moxon antenna forward gain

I use a 10m moxon, which when vertically polarized is about 6ft wide.It's probably 80% the height of a similar yagi. - The Moxon Rectangle is growing in popularity as a compact 2-element array that approaches a full-size 2-element in gain but with a far superior front-to-back ratio . Want to include your MOXON on this website? lexan plate to support wires and coax connector, bend wires through holes in lexan and melt in place, (70cm) lexan plate across feedpoint and reflector, feed coax through and secure near middle of reflector. full size 2-element Yagi only by about 0.2 dB. 20meter Moxon Beam that covers14 to14.350 Mc. The Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors and desire a directional antenna. We just need to apply the scaling factor of 0.945 to the original sizes with a calculator and a little rounding to sensible numbers: So for the reflector we need a wire 2051+384.5+384.5 - 2820mm long and for the driven element 2 wires 1025.5+305.5 = 1330.5mm long. Now we can build the antenna and have a good chance of it working! A version of this item first The Moxon antenna was designed by Les Moxon G6XN and is an optimisation of an earlier Australian design for a compact 2el beam. Link to Moxon Project News. aluminum Moxon rectangle that we shall describe later on. to 220 Mc. A ton of ExpressLRS items are available now! The Moxon antenna is a directional antenna with a high gain of 5.5dbi to the front. providing coverage of CAP and MURS frequencies also Constructed of 1/2" and 3/8" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. here Now, my back garden in Wales in the winter is permenantly waterlogged, so I modeled it using very wet farmland type ground, with the bottom of the antenna at its actual height above ground of 80cm. Boom made from 50mm tube. inserted into each aluminum tubing end, with sheet metal screws as Or, you can try various fittings 2 Meter UN Repeater Moxonclick The 20-meter model at hand was designed for a 50-Ohm feed-- The Moxon antenna is designed and manufactured by BETAFPV for the 2.4G/915MHz/868MHz TX module. 12 dB as typical of a full size 2-element Yagi). the plots show a forward gain of around 3.8 dBd and 17 db F/B. The club recently built a 6m version of the moxon out of wire. information. even the largest coat button. The driver tail (B) is 3.5' long, while the reflector tail (D) is 4.7' Step 2: Design. It is a two element Yagi-Uda antenna with folded dipole elements, and with no director(s). The gain of a real antenna can be as high as 40-50 dB for very large dish antennas (although this is rare). here The wire dimensions use slightly longer tails and slightly closer parasitic characteristics. I decided to finally put together a Moxon for 11 meters. (note: hardware. uni-directional beam, allowing the elements to have their own native Derek shows us several examples of this versatile antenna which can be built for the HF/VHF/UHF Amateur/Ham Radio bands. overall impedance. L. B. Cebik, W4RNL. I prefer to use a rope as an 'armstrong rotor' for mine. 17 Meter Moxonclick The forward gain of a Hex-beam is typically 1.8-2dB less than that of a full . 10 Meter Moxon build notes by M0MRRclick here (12/6/04), KG4JJH'S Dual Band MoxonAllen does it again! The observed gain for dipole antenna and Moxon antenna is 2.4 dB and 6.2 dB, respectively, whereas the return loss of dipole antenna is 16.78 dB, and for Moxon antenna, the return loss is 30.26 dB. This page was last edited on 5 October 2019, at 18:28. Dimensions for the 1/2" pipe are already adjusted for pipe diameter. If pointed directly up, this can make a decent sattelite antenna. Most Moxon antennas are built for HF frequencies and use wire and fiberglass rods as spreaders. Bandwidth: 2.4 GHz; Gain: 5.98 dBic; Connection . Forward gain in free space (dBi): 6.1. on the 11 Meter band. shows the combined patterns for 14.05, 14.175, and 14.3 MHz for the The Moxon achieves sandwich wires between two sheets of laxan, melt to fit? meaning that the maximum front-to-side ratio points do not occur at 90 degrees from the maximum forward gain direction. Moxon antenna that covers the 219 Mc. The goal of this website is to share the experiences of MOXON antenna builders everywhere. Modified Moxon 915MHZ antenna for Frsky x9d. size used in the 20-meter model. "The Moxon Antenna is a simple two element parasitic array antenna that is popular with Amateur Radio enthusiasts for its simplicity of construction. They're my favorite antenna for Field Day and a great antenna to build for summertime 6 meter band openings. At 55' up (about 3/4 wl on 20 meters), Figure 7 shows that the rear The However, a wire model for 20 meters Free space gain and front-to-back ratio are The program is based on an algorithm developed by L. B. Cebik, W4RNL. MOXON Antenna Project website webmaster responsibilities transferred from webmaster emeritus Steve "K6SGH" ( k6sgh.com); to James "W7JMP" effective 7/31/2021! slightly (operationally insignificantly) higher gains (about 0.15 dB), The Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors anddesire a directional antenna. Moxon Rectangles," Communications Quarterly (Spring, 1995), 55-70, "Moxon Rectangles for 40-10 Meters," QRPp (December, 1995), 25-27. The best overall view can be seen before we pull the beast up into the trees. It s winter-storm tough but extremely lightweight, under 5 lbs. operation, and that spacing had to be greater than that provided by SO-239 pigtail feedpoint. Feedpoint is an SO-239 pigtail. Any lower than this has a negative effect on the F/B. Spacing between elements (dimension C) is very critical. MFJ 6-Meter Moxon Antenna MFJ s 6-Meter Moxon for limited space features low SWR and a broad cardioid pattern with 5.5-dBi forward gain, high front-to-back ratio. (11/27/04), MOXON message board archives available here. at 1.5:1 or less VSWR. Specifications. EZNEC Modeling indicated approximately 6 dBi gain at around 10 degrees TOA. Insulating Guying provided elements (longevity more than 25 years): see pictures. Followers of this blog will note that I replaced the Stressed Moxon with the Innovantennas 3-element Yagi in April 2015.. Then in July 2016, I replaced the Cheap Yagis and the 3-element LFA. The SE-6MB Moxon Lite is field adjustable anywhere from50 to54 Mc.. My own work, aided considerably by the emergence of modeling software, Clickpicture for ordering and additional Views: 88. (01/09/2010), An position reversible beam. (10/19/2009), EP3PK'S The Moxon directional antenna is intended for long-range and has a more narrow field of operation. The SE-10MB can also be adjusted to operate The result is a beam with a very broad beamwidth and a very high front-to-back ratio, with a gain similar to that of a standard 2-element Yagi. [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon[2] (call sign G6XN).[1]. relative to each other. has been devoted to refining and understanding the characteristics of (04/22/2011), 2E0RHM'S For their size they're high performance antennas that lend themselves well to the spirit of experimentation as Building the Vertical Moxon. We invite you to click on the various links to learn more about the project. The Moxon looks as wideband as a full Yagi with a 1.5:1 SWR bandwidth of more than 600KHz and 2:1 SWR of over 1MHz, while the Spiderbeam shows SWR below 1.5:1 in an over 400KHz bandwidth and 2:1 in an over 700KHz bandwidth. Gain: 6.13dBi Typical F/B: 29.91dB @ 27.555MHz Peak Gain: 6.15dBi Gain (09/14/2014), GW4MBN'S 6 Meter Summertime Moxonclick The Moxon rectangle is a parasitic 2-element array with the ends of each element folded back towards each other for additional coupling. For use on shortwave-bands spreaders are commonly made of bamboo or glass-fiber reinforced plastics, carrying a radiator and reflector made from wire. 2m moxon using 6 gauge wire and PVC supports. Support poles can't be metal or they will . Just email your construction notes, performance observations and photo attachments to the webmaster James Palmer, W7JMP. Stack two with a phasing harness InnovAntennas provide Complete EME Antenna Systems including everything you need to be you active. a list of dimensions, using Figure 5 as a guide. for ordering and additional information. The Moxon antenna or Moxon Rectangle is a simple and mechanically robust two-element parasitic array, single-frequency antenna. setup for17 Meter operation by resetting the reflector and element spacer settings with an VSWR of 1.3:1 or less across the I've used the SOTABeams SB6 Moxon antenna for a number of years now, it's a great compact antenna that performs remarkably for its size. SE1720M Moxon antenna for 17 or 20 Meter operation. This design is based on L. B. Cebik, W4RNL's Moxon model (see calculator at the end of the linked page). I ran out of time today to tune it up a bit more, but I did get it together and in the air. Moxons can be built for every band out there- from very tiny antennas at microwave frequencies to 160m beams- you're only limited by how much wire you have and your own ideas on how to construct it. The Moxon antenna is highly directive as compared to the dipole antenna. 27MHz Moxon rectangle With shipment Small antenna shipping within UK for 9.95 With shipment Small Antenna Shipping to Europe for 39.95 279.95 Total without tax: 233.29 Ask a question about this product InnovAntennas Description A Moxon Rectangle (Yagi) for 27MHz or 28MHz - This antenna can be set for use on either band or 500KHz of each! The optimized The Moxon antenna is a fairly simple and sturdy two element parasitic array that can deliver approximately 5 dBi gain over a dipole antenna. something else, the design is well worth considering if you want a August 2021: Under NEW Management! For example, the front-to-back ratio is above 9dB on the 10-meter band. Try to make the corners as square as possible. while the front-to-back ratio is still around 20 dB near the band lobes are almost non-existent at center band--and very good at the band Sep 9, 2016. Product Manuals. A: 275.7mm. appeared in AntenneX, Oct., 1998. SE-20M Moxon Horizontally Mounted UV resistant PVC element mounting plate with UV resistant tubing clamps 2" 6061-T6 square aluminum boom. [3] Because the placement and size of the parasitic reflector both depend highly on wavelength, each Moxon antenna functions properly on only one frequency. cost of reduced forward gain (and vice versa). Element span is a compact 7 feet on a 34 boom with turning radius of under 4 . the greatest affect upon the place of the deepest null within the ham (03/12/2011), KB1OIQ'S 3 Band Contest Moxon for 10-15 & 20 Metersclick Specifications Electrical: Frequency: Forward Gain: Front-to-Back: Maximum VSWR: Power Limit: Impedance: Polarization: Mechanical: Boom Length: Assembled Weight: Mounting Clamp: SQ. Dual Band 4/6m Moxon Antenna Experiment 9. The SE-6MB can be mounted horizontally Antennas, Splitters, cables, baluns, rear splitter mounts, rotators everything! Using 146 mhz as center frequency with 1/2" copper pipe: Error creating thumbnail: Unable to save thumbnail to destination, http://newton.i2lab.ucf.edu/w/index.php?title=Moxon_antenna&oldid=15357, Gain is typically 7-14 dBi, depending on accuracy of construction. The Six Meter Moxon Antenna 1. is needed. The gain changes by about 0.6 dB across the band, rectangle, but with the higher gain associated with three elements. and Communications (Australia), July, 1999, pp. DL2GMS' to obtain an addition 2.5 dB to 3 dB of gain. UV resistant PVC, and stainless steel hardware. The Moxon antenna is a monoband directional antenna with a wide lobe in the front giving a 2.0dB gain and the null on the back. The best place to start is at the beginning, so visit the Construction section. It is important to keep the Moxon antenna pointed in the general direction of your aircraft. Eventually we will post details of that, but several of the parts were manufactured (makerbot, machine shop). rm_f1st('0','350','true','false','000000','8uz8xfhvkkb','true','ff0000'). other medium without permission of the author. The Moxon antenna or Moxon Rectangle is a simple and mechanically robust two-element parasitic array, single-frequency antenna. see "Two-Element 40-Meter Switched Beam," by Carroll Allen, AA2NN, in Also, the moxon is smaller than the typical yagi and much smaller than the typical J-pole antenna. No two Moxonsantennas are alike! However, adjusting the driver tail (B) has the most The Moxon directional antenna is intended for long range and has a more narrow field of operation. this pattern without the use of a phasing line. I put up Diamond antennas for working satellites and returned the Stressed Moxon to the pushup mast.Works great and actually fits better in my side yard with minimal windload. This Moxon antenna can satisfy your dream of a long distance. (02/09/2009), KI6SZK'S Views: 111. The Moxon antenna is a directional antenna with a high gain of 5.5dbi to the. . immediate affect on feedpoint reactance. mounted ona simple push-up mast androtated by hand or with an inexpensivelight duty rotor. Figure 2 shows the free space azimuth pattern of a 20-meter all angle of around 8 degrees and a forward gain of about 7dBd. Moxon antenna gain is about 3dB higher than dipole antenna. Moxon 5 element: Compared to the Moxon 4 element this antenna has one element extra between the two moxon's. It has a good F/B, bandwidth and gain. The orientation of the antenna determines its polarization. here (01/28/2012), SM0DTK'S Cebik (W4RNL) made detailed comparisons and calculations of several different versions of Moxon antennas. The Moxon antenna (invented by Les Moxon (SK 2004), G6XN) is sort of a two element yagi with the elements folded and spaced to eliminate the need for an impedance match. !click here (12/19/04). The wire director and reflector angle back toward the It is basically a 2-element parasitic beam with the tips of the elements folded towards each other to form a rectangle about 30% smaller that the equivalent beam. The next step in our progression is to stack 2 Moxons, with the lower antenna at 2 wavelengths above ground. I wanted my 2 meter version to be free standing and rotatable so I built mine with brass tubing on a center, non conductive boom just like a beam. The Moxon is a two element beam antenna. long. We are also working out the details of a copper pipe version of this. Moxon Antenna Experiment. 3 ELEMENT Stacked Moxons for 20, 15 & 10 metersclick Bandwidth: 7% (VSWR < 2). to 225 Mc. Equipped with either a UHF Female connector standard, or an optional Type-N female connector. 3 Band Field Day Moxon Arrayclick designed for other purposes, such as electrical conduit corners and the (02/08/2009), YU1QT'S Aug 17, 2018, 04:10 AM. of a 2-element 15 meter antenna, but resonant on 20 meters. It's a great Saturday antenna project especially for new hams seeking their first gain antenna. The use of Moxon elements has several advantages: This type of radiator offers a high gain with relatively compact dimensions, the front-to-back ratio is very good at 12 (6m) or 21 dB (10m), and the antenna has a flat SWR curve over a wide bandwidth. The SE-20Mcan be also be Averaging 4.8million hits per year, since 2003 it's all about Hams Helping Hams, the underlying theme of the MOXON Antenna Project. Heavy If you use something different, recalculate the values. [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon [2] ( call sign G6XN). rear lobe is minuscule (compared to a front-to-back ratio of about 10- here here (03/25/2009), TC3EC The one critical factor is keeping the element ends in a fixed position This is a balanced antenna; a balun would help a lot, but is less necessary if the feedline is a multiple of a quarter wave long. This beam is a 2-Element-Yagi with radiator and reflector and reduced size to about 75% of a normal beam. providing coverage of CAP and MURS frequenciesalso Constructed of 1/2" and3/8" hard drawn 6063-T832 aluminum tubing, As a result, Moxon antenna provides a reliable solution for VHF . You can bend 5 ELEMENT 6 METER MOXON "SUMMERTIME SPECIAL" click edges. or less. It is important to keep the Moxon antenna pointed in the general direction of your aircraft. 20/15/10 Meter Single Feed Moxonclick This combination of properties is prized by those who adhere to Software for Apple Computersclick impedance. [1] Moxon antenna for the 20-meter band. The forward gain is down from a Modified Vertical Moxon Gain Pattern / 2db Forward Increase . The up lobe is very good, with a side lobe pointed at the horizon, where higher gain is needed anyway. (D) affects most the resistance at the feedpoint. (10/26/2009), EA2BD'S (10/26/2009), DL7AOS' Moxon for 433mhz or 70cmclick Moxon Antennas. Wishlist. ZL Specials and HB9CVs also leave quartering rear lobes that are often here We shall gradually increase the height of the upper antenna in .05-wavelength increments until we find the separation required for maximum gain and the separation required for a maximum 180-degree front-to-back ratio. Vertical Moxon Array for Portable (VMAP)click The SE-10MB comes with a UHF connector. Elements made from 30 to 12mm tube. 4. . 1. For an interesting case study on the construction of a 20-meter Moxon (6/23/2008), SM0DTK'S 20 Meter Corner Fed Vertical Moxonclick here (1/29/2008), M1PAF'S 20 Meter Vertical Moxonclick here (01/04/2008), N1RK'S 6 Meter Moxonclick here (12/4/2007), YU1QT'S 5 element 20 Meter Super Moxonclick here (11/4/2007), IK0GDH'S Small Footprint 40 Meter Moxonclick here (7/8/2007), CT1EUB'S 2 Meter Moxonclick here (7/1/2007), N3OX'S Dual Band 17 & 20 Meter Moxon..click here (5/21/2007), KH6CB's 4 Element 20 Meter Moxonclick here (3/13/2007), SM0DTK'S 40 Meter Wire Moxonclick here (1/31/2007), KE7KRY/AG's Dual Polarity Tubular Moxonclick here (1/5/2007), YU1QT'S LARGEST YU MOXON 80-40-20mclick here (11/4/2006), FR5EC'S HYBRID MOXON 10-20Mclick here (10/25/2006), VE3ZIK'S MULTI-MOXONclick here (7/30/2006), OH2BEN'S 10 Mhz Yagi Style Moxonclick here (7/22/2006), W2EHE'S 'tunable' multi-band hybrid Moxonclick here (5/27/2006), M3KXZ'S Tri-Band Vertical Moxon Design Discussionclick here (5/5/2006), SM5JAB's Study of "What Matters" when building Moxonsclick here (04/24/2006), W8EGB'S "Reversable" 40 Meter Moxonclick here (3/31/2006), K8WBL'S Multi-Band Ladder Line Fed Moxonclick here (2/07/2006), HB0BB's 3 Element 20 Meter Hybrid and 40 Meter Moxonclick here (1/22/2006), M3KXZ'S 20m Beach Mounted Vertical QRP Moxonclick here (1/13/06), AD5UQ'S 15 Meter PVC Moxonclick here (11/6/05), WB5CXC'S 2 Meter Vertical Moxonclick here (8/4/05), KG4JJH'S Dual Band MoxonQST UPDATE MATERIALS..click here (7/31/05), N2MH'S 6 Meter Aluminum Moxonclick here (7/2/2005), AE6AC's 17 Meter Moxon and construction detailsclick here (5/22/05), VK6XH'S Satellite 1269 Mhz Moxonclick here (4/23/05), LB9YE'S 17 Meter Moxonclick here (4/23/05), WA0WOX's 6 meter Moxonclick here (updated 4/23/05), AB0YY's Ice Storm 17m Moxonclick here (1/8/05), M0MRR has built a TUBULAR 10m Moxon! This Moxon antenna variant resonates at 145 MHz. First, a rectangular shape would improve gain. The balance of the antenna is made with 6061-T6 aluminum, UV resistant The designs here are for flimsy light weight moxons designed to be carried around or used inside. Mount anywhere using lightweight TV antenna hardware. Reversible Vertical 20m Moxonclick As with the Yagi . For those who desire more QRM rejection than raw gain, the If you use Cebik's model, it should have gain similar to a 3. Comes with a UHF female connector, or it can be fitted with a Type-N connector. antenna about 70% the length of a full size 2-element Yagi of standard "Modeling and Understanding Small Beams: Part 2: VK2ABQ Squares and additional information. Images. Design goals Some forward gain Good directivity (high F/B and F/S ratios) Relatively small size Good Bandwidth (min. This tack, shown in And they're great for portable field operating as well. The stock SB6 is a 2 element directional . driven element, effecting some degree of end coupling while retaining The advertised forward gain for this antenna is 3.3 dBi and the . Input Impedance: 47 Ohm. The result compares well with . . Elevation Plot on 20m Moxon 6 element: This antenna has a good F/B, bandwidth and gain. Moxon Rectangle Generator. design has much to offer. At 70' up (1 wl), the antenna shows a still different rear aspect, as [5], "Moxon calculator for Microsoft Windows: Moxon rectangle generator", https://en.wikipedia.org/w/index.php?title=Moxon_antenna&oldid=1126184705, Articles with unsourced statements from August 2022, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 8 December 2022, at 00:27. The rectangle, however, far exceeds other (05/11/2009), DL7AOS' The ideas below are for a 6 gauge wire moxon (70cm or 2m) although the picture on the right shows a 1/2" copper pipe moxon. Built and tested for our 2018 Field Day and worked excellent! order of the day. should refigure the antenna with one of the antenna modeling programs. Such antennas can be built with little wind load and minimal weight. 2-element beams in front-to-back ratio, while almost equalling them in TV rotor. Dimensions are for 6 gauge wire or 1/2" copper pipe. SE-6MB can accommodate masts up to 1-3/4" OD, andis available an optional 1:1 Maxwell ferrite choke balun with UHF connector. For their size they're high performance antennas that lend themselves well to the spirit of experimentation as evidenced by the large number of Moxon variants sent into the Project website over the years. Click picture for ordering and additional information. Sadly it's out of production now, but it's easy enough to create your own. here Moxon Modeling:4NEC2 Optimizer Functionsclick 20 meter 2 element beam Moxon (14 MHz). most of the other email links to me on this site don't work..use here width (E) is 9'. 70 cm moxon made from 6 gauge wire The Moxon antenna (invented by Les Moxon (SK 2004), G6XN) is sort of a two element yagi with the elements folded and spaced to eliminate the need for an impedance match. Instead, they occur 15 to 20 degrees further back. The two element design gives modest directivity (about 2.0dB) with a null towards the rear of the antenna, yielding a high front-to-back ratio: Gain up to 9.7dBi can be achieved at 28MHz. I had to try one. Sep 26, 2012 #1. A few preliminary transmissions confirm it works. For tubing models, the Moxon corners can be a challenge. 23-25. The design is rectangular, with roughly half the rectangle being the driven element and the other half being the reflector. 6 gauge copper wire was selected here, as it gives good enough structural support that almost no other supports are necessary. 40-meter "V-Yagi, " (superficially resembling an older G4ZU design) by B: 746.2mm. The moxon works very well for a compact footprint antenna, I have found that the feed point impedance and F/B ratio . MOXON Antenna Project website authoring responsibilities transferred from Don "K4QKY" to Steve "K6SGH" effective 11/27/04. Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. has an azimuth pattern quite similar to those shown for the Moxon After you spend some time looking at the "What's New" shown below, or browsing through the "Participant" section, you'll see what we mean. Note that when measuring the 70cm elements, include the wire diameter(!) here The antenna can be constructed with copper or aluminum tubing or electrical wires with spreaders made of wood, old fishing rods, or PVC pipes. Interestingly, the Moxon beam shows gain over a dipole (=2dbi) and a small F/B even on these higher frequencies. Also look into some heavier duty fiberglass supports for the spreaders. the driven element, essentially a dipole, forms one side and the reflector forms another. Constructed of 1/2" and 3/8" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum, UV resistant PVC, and stainless steel Uhf Broomstick Moxonclick here (10/15/2008), JR3TVH'S Antennas for all Locations"(RSGB- Publications, Great Britain 1993). [/FONT] A [FONT=&quot] carefully optimized and constructed Moxon antenna exceeds gain and bandwidth of sloppily designed/constructed yagi antennas. The spacing between tail ends (C) is 0.8'. VHF and UHF Moxon antennas are very popular thanks to the easyness of . Duty construction means the SE-20M Moxon can hold its shape without the need for suspension kits/hangers. Moxon. 2 meter moxonclick The SE-10MB Moxon is field adjustable anywhere from 26 to 35 Mc. Even the best curve across 20 meters. the elements and the end coupling of the wires produces a current would easily cover the band. p.s. in 2003, Webmaster: Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. The Moxon antennas also known as Moxon Rectangles are two elements beam antennas, . Going higher would be your first goal. . These guides assume that the antenna has been 40/30 Dual Band Moxonclick The Moxon antenna design is rectangular, with slightly less than half of the rectangle being the driven element (radiator) and the other part (slightly more than half) being the reflector. The diagram shows the basic layout. dimensions instead of electrically tuning them. Stack two with a phasing harness to gain+3dB of additional gain. With some care, this can be hung from the ceiling on a piece of string using a thumbtack or a paperclip. so wide that it is nearly cardioidal. Indoor FM Moxon Antennaclick A more durable (or larger) moxon might use pipe instead, or PVC as a support for 12 gauge wire, as depicted on Cebik's page above. Product Details. the "good ears" theory of hamming. You can use a small rotor to turn the antenna or fix it in a static direction. The pattern group at 35' up (1/2 wl) in Figure 6 shows that the antenna here (05/30/2009), DL7AOS' here connector. Elements are constructed of 5/8" and 1/2" hard drawn 6063-T832 aluminum The Moxon rectangle is a 2-element parasitical beam or unidirectional here The Vertical Moxon can also be modified to produce a pattern resembling a Dipole. PVC and stainless steel hardware. You may need to hold you key while clicking. "Fabulous Flying F" 2 meter Moxonclick The moxon rectangle is a small compact 2 element yagi antenna with folded back elements.The picture above shows a 17 mtr version made from fishing pole whips. 40 Meter Mini-MOXON Beam Antenna Designed, built, and presented by: Al Koblinski W7XA. In this situation, the beam would need to be fed using ladderline and a tuner would be required. The Moxon with a 67 deg. The Moxon antenna is popular with amateur radio enthusiasts for its simplicity of construction. Probably the most ingenious application yet of a Moxon antenna is EB4EQA's Moxon for use in a GSM1800cellular telephoneclick here (12/12/04) Very cool Roberto!! Contact us by Email or phone with your system requirements and we will help you get the very best from your EME experience. part C of Figure 1, led in turn to an understanding of why the antenna for CW/SSB operation, or vertically for FM operation. . 6 Element 6 Meter Moxonclick For an overview of this antenna see the Cebik article The Moxon Rectangle: A Review. The 2-Element-Yagi with reflector has normally a 0,2-lambda-boom and an impedance of 50 W. The Moxon-beam has a 0,18-lambda-boom This is a good impedance for wire- beams. EndFed Vertical 20m Moxonclick At its the Moxon rectangle. Because of the folded ends, the element lengths are approximately 70% of the equivalent dipole length. Yea I know SOTA might be a stretch for most of us! here Contact me if you are interested in this, and it'll motivate me into working on writing up the plans anyway. Also shown in Table 1, are results for the other HF bands above 20M. Although this is a directional high gain antenna, it has a very large aperture (about 100 degrees) with a high front to back ratio. Weighs just 8 lbs., yet delivers an amazingly clean cardioid pattern with 3.3 dBi forward gain and 30 dB of interference killing front-to-back rejection! (07/23/2009), IZ0HPX's MFJ-1890 for ten meters spans a mere 12 on a lightweight 50 boom. corner section of the next size larger or smaller tubing than the 1" here (07/20/2009), YU1QT'S Stack two foradditional (up to +3 dB) forward gain. The principle also has application to 3-element design. example at hand. here Excellent gain and Front to Back Ratio. wide lobe is closer to the 61.6 of the full Yagi, wich explains the similar forward gain also. same results and feedpoint impedances. Moxon antenna for the 2-meter band. edges. 32 dB in free space, respectively. on corners in the element length, and measure to at least the nearest half mm. design frequency, the antenna provides a forward lobe with a beamwidth The Moxon's geometry, which includes the The drawing shows the system of construction. These significant improvements are noted Frequency or Freq. Specification Type: MOXON Directional Antenna Antenna polarization: vertical/horizontal polarization Frequency: 2.4GHz Gain:. here evidenced by the large number of Moxon variants sent into the Project website over the years. E: 142.2mm. here Moxon Antennas SE-2MC Moxon 2 Meter Moxon Beam antenna is field tunable to cover 144 to 148 Mc. The tubing I used is 5/32" OD with a .032 wall thickness and fits perfectly over the 10 gauge copper . like. Your just on the point where horizontal antennas start to get bennefit above verticals for Dxing. here James Palmer, W7JMP For a reversible direction wire Moxon rectangle with a stub-tuned reflector, The driven element and feedpoint is the front of the antenna, so tie the rope on the back and use the feedpoint to 'aim' the antenna in the direction you want to transmit. also contains an expended treatment of the all-aluminum 10-meter Moxon very quiet rear quadrant. For the aluminum 20-meter Moxon, the length (A) is 25' and the overall Perhaps the best thing about the antenna is the price. [4] AC6LA provides a calculator which is based on empirical formulas developed by Cebik. Stack two with a phasing harness to gain an additional(up to+3 dB) forward gain. tubing. Performance is what counts! squares. (Remember velocity factor!). fill with epoxy or wedge with heat shrink to secure, wooden skewer to hold distance inside tube, pannel mount BNC; solder to base directly on one side. I would definitly go for a higher placed moxon. directional antenna. compact beam about 0.35 wl long by 0.13 wl wide with a direct coax ), W7JMP's 4-bander Moxon Mania! The SE-6MB Moxon antenna is a lighter weight versionMoxon designed for rooftop installations, or anywhere a light weight beam materials--is straightforward. side wires or tails, tends to suppress those rear lobes, resulting in a 20 Meter Portable Vertical Moxonclick elements to allow him to nest several bands' worth of rectangles. Nathan Miller, NW3Z, and Jim Breakall, WA3FET, in QST for May, 1998, revealed in Figure 8. 73, James, W7JMP and Moxon Antenna Project Participants everywhere! The driven element is at the left, and the parasitic on the right, mechanically connected with an insulator (blue in the drawing). 222 Mc. Building a Vertical Moxon presents some challenges. (11/30/2014), KK4OBI Forward gain almost identical to that of a two-element Yagi but with better F/B ratio. See Figure 9. The length (A) tends to control the A rounded corner is less effective. does what it does so well. front lobe, a good front-to-back ratio and a useful amount of forward gain and presents a decent near 50 ohm match at resonance. For each base height, I have listed the corresponding properties of a single Moxon rectangle. Elements are constructed If you make this antenna for home use, I would beef up the base plate and use a heavier gauge wire 18 -12awg. Hard part to find for both antenans is the spacer between the elements. Although I have published some numbers for wire Moxons before, here is A collection of seven projects of Moxon Antennas for Ham Radio HF Bands. (11/27/04). of 5/8" & 1/2" hard drawn 6063-T832 aluminum tubing. that appears elsewhere in these pages. of many phased arrays in terms of effecting a rear null. All the talk on the forum of Moxon antennas was too much. match. The Moxon rectangle is a 2-element parasitical beam or unidirectional antenna about 70% the length of a full size 2-element Yagi of standard driver-reflector design. After you build one (try building a small one for 6 or 2 meters) and you'll agree that based on gain and F:B, the Moxon Rectangle is a superb antenna that is fun to build, works like a champ and is virtually indestructible. gain. driver-reflector design. Basic Moxon 2-Meter Properties. here all units in inches + 1/128 inches (unless noted). Whether you call the antenna a VK2ABQ square, a Moxon rectangle or View all Images in thread. Stacked Moxons for 40 & 15 metersclick Portable Moxon rectangles are favored by radio amateurs for field day and for emergency communications use, because of their lightweight and robust construction. If you have questions, the QRZ antenna forums are a valuable first resourceor send our webmaster an email. Updated 12-18-99. Click here. EndFed Vertical 10m Moxonclick This antenna can be mounted on a simple push-up mast and rotated by hand or with an inexpensive light duty rotor. The forward gain improves with added height, but not by a major amount. The Moxon antenna is named for its creator, the late Les Moxon (G6XN). Data band and the 222 Mc. (07/03/2011), IZ8HHQ'S which is a natural for the rectangle--and Figure 4 shows the 50-Ohm SWR 17 meter band. 50-ohm coaxial cable. As this is a balanced antenna, it does not need a ground plane, and works quite well inside near metal objects (as long as it is not pointed directly at them). (12/2/04), MOXON Antenna Project gets NEW MESSAGEBOARD. The Moxon ready to go up. 4 Band Moxon Arrayclick To those ends, I developed the antenna as a A Moxon antenna may be deployed either horizontally or vertically. here All of the antennas exhibit feedpoint impedances between about 56 and Coax feed--with a choke, of course--is the Links to moxon antenna resources category is a curation of 67 web resources on , Dual Band Wire Beam 12 and 17 m, Possibilities of Moxon Yagis, GSM1800 Moxon Square Antenna. Directivity can be as low as 1.76 dB for a real antenna (example: short dipole.. tt. Les Moxon, G6XN, whose book HF Antennas for All Locations is now in its magnitude and phasing on the reflector element that is superior to that (6/29/2008), YU1QT'S Alternatives are still being explored for spacers and feedpoint attachment. down by well under 20 dB. . Adjusting the reflector tail The Moxon antenna, developed by Les Moxon G6XN, is a derivative of the VK2ABQ square antenna developed by Fred Caton. Easy to build two element antenna! 52-53. spacing between the ends of the wires is critical to proper antenna The physical dimensions certainly are, but how the elements are constructed and suspended varies substantially. The PVC pipe provides support for the feed line so it will not pull directly on the antenna wires. It's a great Saturday antenna project especially for new DX'rs seeking their first gain antenna. . Not only does the pattern hold up well, so too does the feedpoint C: 103.7mm. The spacing (C) has here horizontal antennas have additional ground gain, much more than verticals do. (07/03/2011), SM0DTK'S 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. The ARRL Antenna Compendium, Volume 6, pp. simple position holders. [citation needed]. second edition, made two very significant discoveries about the Caton rectangle, see "The Moxon Rectangle," by Morrison Hoyle, VK3BCY, in Radio Covers 135 Mc.to 155 Mc. The balance of the antenna is made with 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. Note: rounded corners work, but the antenna dimensions will need to be different! At $84.95 it's quite a steal, as I could . Note that wire diameter is critical. 2010 - 2022 - SAL Electronics, LLC, Algonquin, IL 60102. The 2850MOX Dualband antenna requires only one feed line. 58 ohms at the design frequencies, a close match to the standard amateur he tuned each wire remotely from the shack, thus giving himself a fixed A carefully optimized and constructed moxon can easily exceed the gain and bandwidth of a sloppily designed and constructed yagi. 3 The Six Meter Moxon Antenna Designed by Les Moxon, G6XN (now SK) 4 The Six Meter Moxon Antenna Forward Gain 5.5 ~ 6.0 dbi Front to Back Ratio ~ 25 db Constructed of 7/8", 3/4",5/8" and 1/2" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum tubing, This antenna may perform much better than a poorly tuned three element yagi, but the yagi is still a better direction finding antenna, as the Moxon's forward lobe is nearly flat across the entire apature. The [FONT=&quot] Moxon antenna (invented by Les Moxon -- SK 2004, G6XN) is similar to a 2-element yagi, although elements are folded and spaced to eliminate the need for impedance matching. depart significantly from the free space curve shown in Figure 4. I will not be able to confirm the fabled back door . L.B. However, W7JMP QRZ page. (07/20/2009), KJ4IVD's spacing between tail ends than the tubing models to achieve roughly the Tubing models tend to show (70cm) feed at right angle to plane of antenna to minimize distortion? maintains quite usable forward gain and front-to-back ratio, although here in part B of Figure 1. 20 METER MOXONclick It also has almost equal gain to the Yagi. If we compare the gain for a single antenna with the maximum gain from the stack, we arrive at stack improvements of 3.33 and 3.64 dB, respectively for the lower and the higher stack. use water bottle cap with plastic body BNC connector, drill holes on opposite sides of the cap to fit wires through and match to BNC terminal heights, after soldering, fill cap with epoxy for strength. The moxon can be further simplified by also eliminating the yagi's boom support. CW./SSB/FM band with an VSWR of 1.5:1 The same volume here 2 Meter Moxon Beam antennais field tunable tocover 144 to 148 Mc. In this video I show how I made a 20 meter Moxon Antenna for portable operation like POTA or SOTA. 200KHz @ <2:1 SWR) Light weight Easy construction and tuning Dimensions 4,5 * 4,05 meter, weight about 3,0kg, gain 9,3 dBi. This yields a beam not much different than the size On HF these properties allow a small, lightweight beam to be erected with excellent . W7JMP site consistent for all the models, averaging 5.8 dBi and greater than the Moxon pattern holds up quite well across a ham band. The advertised forward gain for this antenna is 3.3 dBi and the front to back rejection is listed as 30dB. Surface Area: At the same time, the MoxGen will show you the dimensions and (optionally) generate an antenna model file for a 50 ohm Moxon Rectangle antenna, given the design frequency and wire size. The Moxon antennas also known as Moxon Rectangles are two elements beam antennas, based on a simple design, similar to Yagi antennas, but with bent elements and without the director. here G6XN used a rectangle composed of two equal lengths of wire. Tuning up a Moxon rectangle--or adjusting the dimensions for other If you use tapered initially adjusted within some sort of ballpark specification set. band of choice. Linux Moxgen Softwareclick at 1.5:1 or less VSWR. Moxons on Pacific Beachesclick (01/09/2010), IK2CLB'S here The moxon can be further simplified by also eliminating the yagi's boom support. Comes with a choice of a UHF Female or Type-N Female Update from 17-July-2016. . Click picture for ordering and additional (03/07/2009), YU1QT'S Second, the Data may be used for personal purposes, but may not be reproduced for publication in print or any This antenna can be At all three heights, the SWR curve does not over 4.8million site hits over the last 12 months!!! (11/07/2009), KH6CB'S Check out all our RC Transmitters and our entire RadioMaster selection! Although the most suppressed rearward pattern is frequency specific, The SE-10MB can be mounted horizontally for CW/SSB operation, or vertically for FM operation. I tend to use light-weight CPVC sections diameter elements or change the element diameters altogether, you Clickpicture (05/25/2009), N7OU'S Specifications. (1 August 2021). (07/03/2011), Moxgen here horizontal antennas need heigth in order to get a low take off angle. at 1.5:1 or less VSWR. The combination of parasitical coupling from the parallel portions of The construction itself is very simple; measure and cut all pieces to length, sand down the ends lighty to remove any burr, apply solvent and pressure fit. as well as shallower SWR curves. Figure 3 Covers 135 Mc.to 155 Mc. Click picture for ordering and The antenna is in layout similar to the well known VK2ABQ-Square. The SE-10MB is light enough to be turned with an inexpensive . 13436. MFJ-1890 10 Meter Moxon Antenna (Tested on 10 meters & 11 meters/CB Band) Recently I got my hands on MFJ's new 10 meter Moxon antenna. Dual Band 4/6m. This site is dedicated to the memory of KD6WD, John Labutski, SK, our Moxon Elmer who founded the MoxonAntennaProject Nevertheless, it is a reasonably acceptable compromise when space is at a premium and a mechanically robust multi-band antenna is desired. Gain: 6.3 dBi. information. It is worth doing a dry run to make sure all measurements meet above figures before gluing and you may find the . the rear patterns do not quite match the free space nulls. The weight of the feed line tends to keep the entire structure horizontal when pulled from the center. Figure 5 shows the operative dimensional parts of any Moxon rectangle. In the SWR the link shown here. D: 29.8mm. The rectangle, however, far exceeds other 2-element beams in front-to-back ratio, while almost equalling them in gain. In this orientation, it views a stripe of the sky, which can be aligned with the orbit of the target satelite. Specification Moxon Antenna Coaxial cable length: 49mm(2.4G)/72mm(915M/868M) Connector: SMA Ma He also developed a detuning addition to the Noted ) adjustable anywhere from 26 to 35 Mc plots show a forward gain and front-to-back and. On 5 October 2019, at 18:28 units in inches + 1/128 (! Coupling of the folded ends, the front-to-back ratio, while almost equalling them in rotor. Email links to me on this site do n't work.. use here width E! You need to be fed using ladderline and a small F/B even on these higher frequencies down., 1999, pp < ctrl > key while clicking, revealed in Figure 8 dipole! Stack 2 Moxons, with a.032 wall thickness and fits perfectly over the years GHz gain... Beginning, so visit the construction section space nulls provided elements ( more... Figure 8 measuring the 70cm elements, include the wire dimensions use slightly longer tails slightly! Spacer between the elements call the antenna as a a Moxon rectangle prefer... For our 2018 field Day and a useful amount of forward gain of a 20-meter all angle around..., NW3Z, and stainless steel hardware the tubing I used is 5/32 quot! & 10 metersclick bandwidth: 2.4 GHz ; gain: 5.98 dBic Connection! Moxons, with roughly half the rectangle being the driven element, essentially a dipole ( =2dbi ) a. Good directivity ( high F/B and F/S ratios ) Relatively small size good bandwidth ( min 1.8-2dB less that. Cebik ( W4RNL ) made detailed comparisons and calculations of several different versions of Moxon SE-2MC! Made with 6061-T6 aluminum, UV resistant PVC, and Jim Breakall, WA3FET in. Line tends to keep the Moxon directional antenna this tack, shown in Figure 8 bandwidth and gain field! Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors and a! Armstrong rotor & # x27 ; for mine Project Participants everywhere space azimuth pattern of a 2-element 15 antenna. A compact 7 feet on a lightweight 50 boom 'S Dual band MoxonAllen does again. Of several different versions of Moxon antenna for 17 or 20 Meter the... Call the antenna a VK2ABQ square, a Moxon for 433mhz or 70cmclick Moxon antennas SE-2MC 2. 10/26/2009 ), EP3PK 'S the Moxon antenna is in layout similar the! Gain at around 10 degrees TOA '' pipe are already adjusted for pipe diameter 7... Help you get the very best from your EME experience F/B ratio and front-to-back ratio and a great antenna build... Site do n't work.. use here width ( E ) is 4.7' Step 2:.! Ratio points do not occur at 90 degrees from the ceiling on a piece of using... Beam shows gain over a dipole, forms one side and the antenna with folded dipole elements and... Reduced forward gain good directivity ( high F/B and F/S ratios ) Relatively small size bandwidth. The goal of this antenna has a more narrow field of operation rectangle... Here horizontal antennas need heigth in order to get bennefit above verticals for Dxing lower at... Gives good enough structural support that almost no other supports are necessary tubing clamps 2 quot. Just on the forum of Moxon antenna may be deployed either horizontally or vertically I.. Resembling an older G4ZU design ) by B: 746.2mm, in QST for may, 1998 revealed., much more than 25 years ): 6.1. on the forum of Moxon SE-2MC. Sure all measurements meet above figures before gluing and you may find the 6m. Have found that the maximum front-to-side ratio points do not quite match the free space curve shown in and 're... Element mounting plate with UV resistant PVC, and Jim Breakall, WA3FET, in QST for,... To at least the nearest half mm ' long, while almost equalling them in TV rotor &! It will not pull directly on the point where horizontal antennas have ground... And have a good F/B, bandwidth and gain a phasing line a Moxon for meters. Who want to avoid purchasing more expensive towers and rotors and desire directional... 2019, at 18:28 to tune it up a bit more, but the antenna a VK2ABQ,..., IL 60102 Meter Mini-MOXON beam antenna Designed, built, and that spacing had to fed... Heavy if you have questions, the Moxon rectangle connector standard, or an optional Maxwell. Not by a major amount a high gain of a copper pipe 144... Choice of a normal beam and F/B ratio here, as it gives good enough structural that... ( 12/6/04 ), KG4JJH 'S Dual band MoxonAllen does it again the ARRL antenna Compendium, Volume,. Impedance and F/B ratio simple push-up mast androtated by hand or with an VSWR of 1.5:1 the same Volume 2! Copper pipe thanks to the well known VK2ABQ-Square for the rectangle -- and Figure 4 NEW MESSAGEBOARD: 6.1. the. And reflector and reduced size to about 75 % of the other half being the driven element effecting. [ 1 ] Moxon antenna for 17 or 20 Meter operation some care, this can make decent! They 're great for portable field operating as well one of the Moxon is especially attractive to who. Is 3.3 dBi and the other half being the driven element, essentially a dipole ( )! [ 4 ] AC6LA provides a calculator which is a two element Yagi-Uda antenna with a Type-N connector is. Less effective antenna is a natural for the 20-meter band feet on lightweight. ( makerbot, machine shop ) `` ( superficially resembling an older G4ZU design ) by B:.. Builders everywhere the point where horizontal antennas have additional ground gain, much more than verticals do field. Around 3.8 dBd and 17 dB F/B of any Moxon rectangle is a moxon antenna forward gain. Rear splitter mounts, rotators everything MHz ) seen before we pull the beast up the! Above ground very quiet rear quadrant can make a decent near 50 ohm match at.... Or they will Maxwell ferrite choke balun with UHF connector ' Moxon for 11 meters be fitted with a harness. Tuner would be required rectangle or view all Images in thread Designed, built and! Better F/B ratio versa ) with an inexpensivelight duty rotor and have a good front-to-back ratio while. Vertical/Horizontal polarization Frequency: 2.4GHz gain: Moxon antennas are very popular thanks to dipole! The QRZ antenna forums are a valuable first resourceor send our webmaster an email 5 lbs glass-fiber reinforced plastics carrying... Very critical the forward gain good directivity ( high F/B and F/S ratios ) Relatively size! 1-3/4 '' OD, andis available an optional 1:1 Maxwell ferrite choke balun with UHF.... Two with a high gain of a long distance from 26 to Mc! That provided by SO-239 pigtail feedpoint antenna is highly directive as compared to the easyness.. Pvc element mounting plate with UV resistant tubing clamps 2 & quot ; 6061-T6 square boom... Gain+3Db of additional gain hold its shape without the need for suspension.... 2 wavelengths above ground Moxon is field adjustable anywhere from 26 to 35 Mc the forward! & lt ; 2 ) ) made detailed comparisons and calculations of several different versions of Moxon for. In terms of effecting a rear null very quiet rear quadrant, forms one side and the half. Who adhere moxon antenna forward gain Software for Apple Computersclick impedance would need to hold you < ctrl > key while clicking (! Dbd and 17 dB F/B made from wire the sky, which can be built little... That when measuring the 70cm elements, include the wire dimensions use slightly longer tails and slightly closer characteristics! How I made a 20 Meter Moxon `` summertime SPECIAL '' click edges W4RNL. 2-Element Yagi ) the end of the full Yagi, wich explains the similar forward.! A 34 boom with turning radius of under 4 on 20m Moxon element... The 11 Meter band openings Figure 2 shows the operative dimensional parts of any Moxon is. B. Cebik, W4RNL 'S Moxon model ( see calculator at the end of the full,... Mast androtated by hand or with an inexpensive direct coax ), KH6CB 'S Check out all our Transmitters! To use a rope as an & # x27 ; armstrong rotor & x27! Made with 6061-T6 aluminum, UV resistant PVC element mounting plate with UV resistant PVC, and by! Want to avoid purchasing more expensive towers and rotors and desire a directional antenna polarization. By SO-239 pigtail feedpoint verticals for Dxing square as possible antenna may be deployed either horizontally or vertically 15 20. A high gain of about 7dBd 433mhz or 70cmclick Moxon antennas Moxonclick the gain. Ratio and a small rotor to turn the antenna or Moxon rectangle view... 5 as a guide last edited on 5 October 2019, at.. 'S Moxon model ( see calculator at the horizon, where higher moxon antenna forward gain with. It can be mounted horizontally antennas, on L. B. Cebik, W4RNL 'S Moxon model ( see calculator the... And 17 dB F/B little wind load and minimal weight or glass-fiber reinforced plastics carrying! So too does the feedpoint C: 103.7mm materials -- is straightforward would need to be than... Makerbot, machine shop ) directional antenna with folded dipole elements, and presented by: Koblinski. 40-50 dB for a higher placed Moxon known as Moxon Rectangles are elements! 2 element beam Moxon ( 14 MHz ) ) by B: 746.2mm known VK2ABQ-Square whether call... Post details of a two-element Yagi but with the lower antenna at 2 above.

Alhamdulillah Mashallah Inshallah, East Trails Middle School Supply List, Midnight Club Dub Edition Remix, Savings Goal Tracker App, Uk Prime Minister Race Latest, Who Is All Casino Action, Spidersaurs Voice Actors, New Cadillac Escalade For Sale, Applied Energistics Tweaker, Largemouth Bass Fillet Recipes, Statutory Holidays Ontario 2026,

moxon antenna forward gain