5 ELEMENT 6 METER MOXON "SUMMERTIME SPECIAL" click The driven element is at the left, and the parasitic on the right, mechanically connected with an insulator (blue in the drawing). or less. Data may be used for personal purposes, but may not be reproduced for publication in print or any 6 gauge copper wire was selected here, as it gives good enough structural support that almost no other supports are necessary. EZNEC Modeling indicated approximately 6 dBi gain at around 10 degrees TOA. Surface Area: The club recently built a 6m version of the moxon out of wire. The SE-10MB comes with a UHF connector. The forward gain improves with added height, but not by a major amount. Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. The Spacing between elements (dimension C) is very critical. Antennas for all Locations"(RSGB- Publications, Great Britain 1993). Moxon antenna gain is about 3dB higher than dipole antenna. angle of around 8 degrees and a forward gain of about 7dBd. Moxon Rectangle Generator. relative to each other. C: 103.7mm. Now we can build the antenna and have a good chance of it working! The ARRL Antenna Compendium, Volume 6, pp. 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. Gain: 6.13dBi Typical F/B: 29.91dB @ 27.555MHz Peak Gain: 6.15dBi Gain here Figure 5 shows the operative dimensional parts of any Moxon rectangle. all units in inches + 1/128 inches (unless noted). 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. parasitic characteristics. band of choice. edges. 1. here rm_f1st('0','350','true','false','000000','8uz8xfhvkkb','true','ff0000'). All the talk on the forum of Moxon antennas was too much. 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 wire dimensions use slightly longer tails and slightly closer 50-ohm coaxial cable. here Insulating Guying provided elements (longevity more than 25 years): see pictures. Heavy EndFed Vertical 10m Moxonclick All of the antennas exhibit feedpoint impedances between about 56 and The designs here are for flimsy light weight moxons designed to be carried around or used inside. Yea I know SOTA might be a stretch for most of us! 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. Clickpicture for ordering and additional The physical dimensions certainly are, but how the elements are constructed and suspended varies substantially. (Remember velocity factor!). Data band and the 222 Mc. The stock SB6 is a 2 element directional . Mount anywhere using lightweight TV antenna hardware. ZL Specials and HB9CVs also leave quartering rear lobes that are often the driven element, essentially a dipole, forms one side and the reflector forms another. Elements are constructed of 5/8" and 1/2" hard drawn 6063-T832 aluminum My own work, aided considerably by the emergence of modeling software, directional antenna. The orientation of the antenna determines its polarization. MFJ-1890 for ten meters spans a mere 12 on a lightweight 50 boom. The result compares well with . The Moxon rectangle is a 2-element parasitical beam or unidirectional Excellent gain and Front to Back Ratio. 3 Band Field Day Moxon Arrayclick of a 2-element 15 meter antenna, but resonant on 20 meters. . Views: 88. The Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors anddesire a directional antenna. here Not only does the pattern hold up well, so too does the feedpoint (1 August 2021). If you use Cebik's model, it should have gain similar to a 3. A carefully optimized and constructed moxon can easily exceed the gain and bandwidth of a sloppily designed and constructed yagi. he tuned each wire remotely from the shack, thus giving himself a fixed (D) affects most the resistance at the feedpoint. For tubing models, the Moxon corners can be a challenge. spacing between tail ends than the tubing models to achieve roughly the down by well under 20 dB. on corners in the element length, and measure to at least the nearest half mm. B: 746.2mm. The gain of a real antenna can be as high as 40-50 dB for very large dish antennas (although this is rare). at 1.5:1 or less VSWR. here Coax feed--with a choke, of course--is the The SE-6MB Moxon Lite is field adjustable anywhere from50 to54 Mc.. CW./SSB/FM band with an VSWR of 1.5:1 see "Two-Element 40-Meter Switched Beam," by Carroll Allen, AA2NN, in Modified Vertical Moxon Gain Pattern / 2db Forward Increase . (07/20/2009), YU1QT'S 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. gain. 6 Element 6 Meter Moxonclick "Modeling and Understanding Small Beams: Part 2: VK2ABQ Squares and second edition, made two very significant discoveries about the Caton 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. (11/30/2014), KK4OBI Sep 26, 2012 #1. The SE-10MB can be mounted horizontally for CW/SSB operation, or vertically for FM operation. Any lower than this has a negative effect on the F/B. For each base height, I have listed the corresponding properties of a single Moxon rectangle. order of the day. (05/25/2009), N7OU'S The SE-6MB Moxon antenna is a lighter weight versionMoxon designed for rooftop installations, or anywhere a light weight beam And they're great for portable field operating as well. The antenna is in layout similar to the well known VK2ABQ-Square. 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. Sadly it's out of production now, but it's easy enough to create your own. (07/03/2011), IZ8HHQ'S This Moxon antenna variant resonates at 145 MHz. information. Moxon Rectangles," Communications Quarterly (Spring, 1995), 55-70, "Moxon Rectangles for 40-10 Meters," QRPp (December, 1995), 25-27. Nevertheless, it is a reasonably acceptable compromise when space is at a premium and a mechanically robust multi-band antenna is desired. 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. here 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. Adjusting the reflector tail The tubing I used is 5/32" OD with a .032 wall thickness and fits perfectly over the 10 gauge copper . The goal of this website is to share the experiences of MOXON antenna builders everywhere. (11/27/04). The optimized Element span is a compact 7 feet on a 34 boom with turning radius of under 4 . (01/28/2012), SM0DTK'S 17 meter band. 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. here dimensions instead of electrically tuning them. Stack two foradditional (up to +3 dB) forward gain. to 225 Mc. The one critical factor is keeping the element ends in a fixed position Covers 135 Mc.to 155 Mc. 23-25. Stacked Moxons for 40 & 15 metersclick The Moxon antenna is a directional antenna with a high gain of 5.5dbi to the. Derek shows us several examples of this versatile antenna which can be built for the HF/VHF/UHF Amateur/Ham Radio bands. Comes with a choice of a UHF Female or Type-N Female 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!! Indoor FM Moxon Antennaclick the greatest affect upon the place of the deepest null within the ham The moxon can be further simplified by also eliminating the yagi's boom support. 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. 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. 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. If you have questions, the QRZ antenna forums are a valuable first resourceor send our webmaster an email. in part B of Figure 1. information. I would definitly go for a higher placed moxon. For an overview of this antenna see the Cebik article The Moxon Rectangle: A Review. This design is based on L. B. Cebik, W4RNL's Moxon model (see calculator at the end of the linked page). Hard part to find for both antenans is the spacer between the elements. The best place to start is at the beginning, so visit the Construction section. Figure 3 does what it does so well. 2 Meter UN Repeater Moxonclick [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon[2] (call sign G6XN).[1]. 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. [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. (6/29/2008), YU1QT'S Check out all our RC Transmitters and our entire RadioMaster selection! Linux Moxgen Softwareclick 17 Meter Moxonclick 20 meter 2 element beam Moxon (14 MHz). [1] Moxon antenna for the 20-meter band. 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. is needed. something else, the design is well worth considering if you want a horizontal antennas need heigth in order to get a low take off angle. here SE-20M Moxon Horizontally Mounted UV resistant PVC element mounting plate with UV resistant tubing clamps 2" 6061-T6 square aluminum boom. Most Moxon antennas are built for HF frequencies and use wire and fiberglass rods as spreaders. At its This tack, shown in Moxon Modeling:4NEC2 Optimizer Functionsclick depart significantly from the free space curve shown in Figure 4. Whether you call the antenna a VK2ABQ square, a Moxon rectangle or 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. 4. consistent for all the models, averaging 5.8 dBi and greater than full size 2-element Yagi only by about 0.2 dB. [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon [2] ( call sign G6XN). 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. 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. 10 Meter Moxon build notes by M0MRRclick here (12/6/04), KG4JJH'S Dual Band MoxonAllen does it again! The Moxon directional antenna is intended for long-range and has a more narrow field of operation. 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). the Moxon pattern holds up quite well across a ham band. The SE-10MB is light enough to be turned with an inexpensive a list of dimensions, using Figure 5 as a guide. I had to try one. With some care, this can be hung from the ceiling on a piece of string using a thumbtack or a paperclip. The wire director and reflector angle back toward the Specification Moxon Antenna Coaxial cable length: 49mm(2.4G)/72mm(915M/868M) Connector: SMA Ma MOXON Antenna Project website authoring responsibilities transferred from Don "K4QKY" to Steve "K6SGH" effective 11/27/04. The SE-10MB can also be adjusted to operate L.B. Also shown in Table 1, are results for the other HF bands above 20M. This antenna can be mounted on a simple push-up mast and rotated by hand or with an inexpensive light duty rotor. Alternatives are still being explored for spacers and feedpoint attachment. Uhf Broomstick Moxonclick here (10/15/2008), JR3TVH'S 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. 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. Click picture for ordering and additional Input Impedance: 47 Ohm. 52-53. Link to Moxon Project News. The Moxon antenna is designed and manufactured by BETAFPV for the 2.4G/915MHz/868MHz TX module. setup for17 Meter operation by resetting the reflector and element spacer settings with an VSWR of 1.3:1 or less across the while the front-to-back ratio is still around 20 dB near the band The Moxon antenna was designed by Les Moxon G6XN and is an optimisation of an earlier Australian design for a compact 2el beam. here Even the best VHF and UHF Moxon antennas are very popular thanks to the easyness of . (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! here curve across 20 meters. of 5/8" & 1/2" hard drawn 6063-T832 aluminum tubing. here Wishlist. the Moxon rectangle. If you use tapered Second, the 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. Reversible Vertical 20m Moxonclick for CW/SSB operation, or vertically for FM operation. to obtain an addition 2.5 dB to 3 dB of gain. For the aluminum 20-meter Moxon, the length (A) is 25' and the overall I tend to use light-weight CPVC sections Frequency or Freq. Constructed of 1/2" and 3/8" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum, UV resistant PVC, and stainless steel Moxon. For their size they're high performance antennas that lend themselves well to the spirit of experimentation as A ton of ExpressLRS items are available now! of many phased arrays in terms of effecting a rear null. 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. Modified Moxon 915MHZ antenna for Frsky x9d. 2 Meter Moxon Beam antennais field tunable tocover 144 to 148 Mc. Bandwidth: 2.4 GHz; Gain: 5.98 dBic; Connection . Click here. Free space gain and front-to-back ratio are Forward gain in free space (dBi): 6.1. . The Moxon antenna or Moxon Rectangle is a simple and mechanically robust two-element parasitic array, single-frequency antenna. The driver tail (B) is 3.5' long, while the reflector tail (D) is 4.7' at 1.5:1 or less VSWR. Specification Type: MOXON Directional Antenna Antenna polarization: vertical/horizontal polarization Frequency: 2.4GHz Gain:. If you make this antenna for home use, I would beef up the base plate and use a heavier gauge wire 18 -12awg. At $84.95 it's quite a steal, as I could . width (E) is 9'. this pattern without the use of a phasing line. !click here (12/19/04). 2-element beams in front-to-back ratio, while almost equalling them in I decided to finally put together a Moxon for 11 meters. The Moxon antenna is popular with amateur radio enthusiasts for its simplicity of construction. that appears elsewhere in these pages. DL2GMS' 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. It is worth doing a dry run to make sure all measurements meet above figures before gluing and you may find the . (10/26/2009), EA2BD'S other medium without permission of the author. You can use a small rotor to turn the antenna or fix it in a static direction. Forward gain almost identical to that of a two-element Yagi but with better F/B ratio. for ordering and additional information. For a reversible direction wire Moxon rectangle with a stub-tuned reflector, It's a great Saturday antenna project especially for new hams seeking their first gain antenna. the plots show a forward gain of around 3.8 dBd and 17 db F/B. . antenna about 70% the length of a full size 2-element Yagi of standard (03/12/2011), KB1OIQ'S As with the Yagi . The Moxon antenna or Moxon Rectangle is a simple and mechanically robust two-element parasitic array, single-frequency antenna. For example, the front-to-back ratio is above 9dB on the 10-meter band. 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. We invite you to click on the various links to learn more about the project. design frequency, the antenna provides a forward lobe with a beamwidth The Moxon antenna, developed by Les Moxon G6XN, is a derivative of the VK2ABQ square antenna developed by Fred Caton. the "good ears" theory of hamming. Perhaps the best thing about the antenna is the price. Bandwidth: 7% (VSWR < 2). (03/25/2009), TC3EC here It is a two element Yagi-Uda antenna with folded dipole elements, and with no director(s). "The Moxon Antenna is a simple two element parasitic array antenna that is popular with Amateur Radio enthusiasts for its simplicity of construction. Views: 111. [3] Because the placement and size of the parasitic reflector both depend highly on wavelength, each Moxon antenna functions properly on only one frequency. Stack two with a phasing harness 222 Mc. The diagram shows the basic layout. 20 METER MOXONclick Dual Band 4/6m. rectangle, but with the higher gain associated with three elements. p.s. (11/07/2009), KH6CB'S (11/27/04), MOXON message board archives available here. 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. I ran out of time today to tune it up a bit more, but I did get it together and in the air. (07/03/2011), Moxgen [citation needed]. The Moxon directional antenna is intended for long range and has a more narrow field of operation. Portable Moxon rectangles are favored by radio amateurs for field day and for emergency communications use, because of their lightweight and robust construction. same results and feedpoint impedances. compact beam about 0.35 wl long by 0.13 wl wide with a direct coax Dimensions 4,5 * 4,05 meter, weight about 3,0kg, gain 9,3 dBi. The moxon can be further simplified by also eliminating the yagi's boom support. the elements and the end coupling of the wires produces a current Also, the moxon is smaller than the typical yagi and much smaller than the typical J-pole antenna. Elements made from 30 to 12mm tube. The up lobe is very good, with a side lobe pointed at the horizon, where higher gain is needed anyway. operation, and that spacing had to be greater than that provided by 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. 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. Support poles can't be metal or they will . here SE-6MB can accommodate masts up to 1-3/4" OD, andis available an optional 1:1 Maxwell ferrite choke balun with UHF connector. as well as shallower SWR curves. rear lobe is minuscule (compared to a front-to-back ratio of about 10- The forward gain is down from a The SE-6MB can be mounted horizontally connector. TV rotor. Built and tested for our 2018 Field Day and worked excellent! A: 275.7mm. here I will not be able to confirm the fabled back door . Product Details. in 2003, Webmaster: here Want to include your MOXON on this website? Note: rounded corners work, but the antenna dimensions will need to be different! Constructed of 7/8", 3/4",5/8" and 1/2" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum tubing, At 55' up (about 3/4 wl on 20 meters), Figure 7 shows that the rear has been devoted to refining and understanding the characteristics of The next step in our progression is to stack 2 Moxons, with the lower antenna at 2 wavelengths above ground. squares. 200KHz @ <2:1 SWR) Light weight Easy construction and tuning has an azimuth pattern quite similar to those shown for the Moxon 2010 - 2022 - SAL Electronics, LLC, Algonquin, IL 60102. here W7JMP QRZ page. Dimensions are for 6 gauge wire or 1/2" copper pipe. - 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 . Dual Band 4/6m Moxon Antenna Experiment 9. Moxons on Pacific Beachesclick Building a Vertical Moxon presents some challenges. hardware. 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. ), W7JMP's 4-bander Moxon Mania! 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. August 2021: Under NEW Management! 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. The Vertical Moxon can also be modified to produce a pattern resembling a Dipole. [4] AC6LA provides a calculator which is based on empirical formulas developed by Cebik. Specifications. lobes are almost non-existent at center band--and very good at the band . (07/20/2009), KJ4IVD's Although this is a directional high gain antenna, it has a very large aperture (about 100 degrees) with a high front to back ratio. Vertical Moxon Array for Portable (VMAP)click maintains quite usable forward gain and front-to-back ratio, although magnitude and phasing on the reflector element that is superior to that Interestingly, the Moxon beam shows gain over a dipole (=2dbi) and a small F/B even on these higher frequencies. here Figure 2 shows the free space azimuth pattern of a 20-meter all size used in the 20-meter model. Moxon Antenna Experiment. 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! (10/19/2009), EP3PK'S diameter elements or change the element diameters altogether, you should refigure the antenna with one of the antenna modeling programs. 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. 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 20 Meter Portable Vertical Moxonclick It s winter-storm tough but extremely lightweight, under 5 lbs. The SE-20Mcan be also be inserted into each aluminum tubing end, with sheet metal screws as Averaging 4.8million hits per year, since 2003 it's all about Hams Helping Hams, the underlying theme of the MOXON Antenna Project. Or, you can try various fittings The Moxon is a two element beam antenna. Performance is what counts! 2m moxon using 6 gauge wire and PVC supports. The Moxon antenna is a fairly simple and sturdy two element parasitic array that can deliver approximately 5 dBi gain over a dipole antenna. At all three heights, the SWR curve does not The spacing between tail ends (C) is 0.8'. 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. Dimensions for the 1/2" pipe are already adjusted for pipe diameter. most of the other email links to me on this site don't work..use Feedpoint is an SO-239 pigtail. elements to allow him to nest several bands' worth of rectangles. revealed in Figure 8. Covers 135 Mc.to 155 Mc. additional information. It is important to keep the Moxon antenna pointed in the general direction of your aircraft. here impedance. (05/30/2009), DL7AOS' immediate affect on feedpoint reactance. and Communications (Australia), July, 1999, pp. Instead, they occur 15 to 20 degrees further back. on the 11 Meter band. At the same time, the here The best overall view can be seen before we pull the beast up into the trees. so wide that it is nearly cardioidal. SE1720M Moxon antenna for 17 or 20 Meter operation. It is important to keep the Moxon antenna pointed in the general direction of your aircraft. Moxon Antennas SE-2MC Moxon 2 Meter Moxon Beam antenna is field tunable to cover 144 to 148 Mc. EndFed Vertical 20m Moxonclick The same volume The Moxon antenna is a directional antenna with a high gain of 5.5dbi to the front. Specifications Electrical: Frequency: Forward Gain: Front-to-Back: Maximum VSWR: Power Limit: Impedance: Polarization: Mechanical: Boom Length: Assembled Weight: Mounting Clamp: SQ. Software for Apple Computersclick Click picture for ordering and additional information. (07/23/2009), IZ0HPX's (03/07/2009), YU1QT'S A Moxon antenna may be deployed either horizontally or vertically. Nathan Miller, NW3Z, and Jim Breakall, WA3FET, in QST for May, 1998, (07/03/2011), SM0DTK'S InnovAntennas provide Complete EME Antenna Systems including everything you need to be you active. 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. horizontal antennas have additional ground gain, much more than verticals do. The Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors and desire a directional antenna. 3 Band Contest Moxon for 10-15 & 20 Metersclick Such antennas can be built with little wind load and minimal weight. Cebik (W4RNL) made detailed comparisons and calculations of several different versions of Moxon antennas. spacing between the ends of the wires is critical to proper antenna tubing. sandwich wires between two sheets of laxan, melt to fit? It's a great Saturday antenna project especially for new DX'rs seeking their first gain antenna. 40/30 Dual Band Moxonclick Although the most suppressed rearward pattern is frequency specific, 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. shows the combined patterns for 14.05, 14.175, and 14.3 MHz for the These significant improvements are noted However, adjusting the driver tail (B) has the most Elevation Plot on 20m Moxon 6 element: This antenna has a good F/B, bandwidth and gain. However, Update from 17-July-2016. He also developed a detuning addition to the The length (A) tends to control the This page was last edited on 5 October 2019, at 18:28. The forward gain of a Hex-beam is typically 1.8-2dB less than that of a full . Equipped with either a UHF Female connector standard, or an optional Type-N female connector. Contact us by Email or phone with your system requirements and we will help you get the very best from your EME experience. The Moxon achieves The principle also has application to 3-element design. materials--is straightforward. 20/15/10 Meter Single Feed Moxonclick The Moxon ready to go up. For those who desire more QRM rejection than raw gain, the [/FONT] A [FONT=&quot] carefully optimized and constructed Moxon antenna exceeds gain and bandwidth of sloppily designed/constructed yagi antennas. A few preliminary transmissions confirm it works. Design goals Some forward gain Good directivity (high F/B and F/S ratios) Relatively small size Good Bandwidth (min. On HF these properties allow a small, lightweight beam to be erected with excellent . like. would easily cover the band. example at hand. match. The 2850MOX Dualband antenna requires only one feed line. The gain changes by about 0.6 dB across the band, also contains an expended treatment of the all-aluminum 10-meter Moxon The 20-meter model at hand was designed for a 50-Ohm feed-- The SE-10MB Moxon is field adjustable anywhere from 26 to 35 Mc. They're my favorite antenna for Field Day and a great antenna to build for summertime 6 meter band openings. 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. Eventually we will post details of that, but several of the parts were manufactured (makerbot, machine shop). The combination of parasitical coupling from the parallel portions of The Moxon rectangle is a parasitic 2-element array with the ends of each element folded back towards each other for additional coupling. If pointed directly up, this can make a decent sattelite antenna. However, a wire model for 20 meters Although I have published some numbers for wire Moxons before, here is 40-meter "V-Yagi, " (superficially resembling an older G4ZU design) by Boom made from 50mm tube. Also look into some heavier duty fiberglass supports for the spreaders. Aug 17, 2018, 04:10 AM. long. the rear patterns do not quite match the free space nulls. The pattern group at 35' up (1/2 wl) in Figure 6 shows that the antenna 4 Band Moxon Arrayclick here In the SWR This antenna can be corner section of the next size larger or smaller tubing than the 1" The design is rectangular, with roughly half the rectangle being the driven element and the other half being the reflector. 3 ELEMENT Stacked Moxons for 20, 15 & 10 metersclick simple position holders. "Fabulous Flying F" 2 meter Moxonclick A rounded corner is less effective. View all Images in thread. The drawing shows the system of construction. You can bend edges. designed for other purposes, such as electrical conduit corners and the These guides assume that the antenna has been No two Moxonsantennas are alike! Gain: 6.3 dBi. For use on shortwave-bands spreaders are commonly made of bamboo or glass-fiber reinforced plastics, carrying a radiator and reflector made from wire. We are also working out the details of a copper pipe version of this. Specifications. driver-reflector design. Clickpicture Step 2: Design. 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. to 220 Mc. 12 dB as typical of a full size 2-element Yagi). This yields a beam not much different than the size Because of the folded ends, the element lengths are approximately 70% of the equivalent dipole length. (05/11/2009), DL7AOS' Elements are constructed wide lobe is closer to the 61.6 of the full Yagi, wich explains the similar forward gain also. 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. The Six Meter Moxon Antenna 1. Note that when measuring the 70cm elements, include the wire diameter(!) A collection of seven projects of Moxon Antennas for Ham Radio HF Bands. (12/2/04), MOXON Antenna Project gets NEW MESSAGEBOARD. 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. First, a rectangular shape would improve gain. Directivity can be as low as 1.76 dB for a real antenna (example: short dipole.. tt. 20meter Moxon Beam that covers14 to14.350 Mc. appeared in AntenneX, Oct., 1998. Going higher would be your first goal. Tubing models tend to show meaning that the maximum front-to-side ratio points do not occur at 90 degrees from the maximum forward gain direction. L. B. Cebik, W4RNL. . Your just on the point where horizontal antennas start to get bennefit above verticals for Dxing. here which is a natural for the rectangle--and Figure 4 shows the 50-Ohm SWR . The advertised forward gain for this antenna is 3.3 dBi and the front to back rejection is listed as 30dB. . A version of this item first even the largest coat button. This combination of properties is prized by those who adhere to Product Manuals. This beam is a 2-Element-Yagi with radiator and reflector and reduced size to about 75% of a normal beam. 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. over 4.8million site hits over the last 12 months!!! This site is dedicated to the memory of KD6WD, John Labutski, SK, our Moxon Elmer who founded the MoxonAntennaProject 40 Meter Mini-MOXON Beam Antenna Designed, built, and presented by: Al Koblinski W7XA. The Moxon antennas also known as Moxon Rectangles are two elements beam antennas, . slightly (operationally insignificantly) higher gains (about 0.15 dB), . The Moxon with a 67 deg. Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. The balance of the antenna is made with 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. Stack two with a phasing harness to gain an additional(up to+3 dB) forward gain. uni-directional beam, allowing the elements to have their own native Click picture for ordering and (10/26/2009), 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. Stack two with a phasing harness to gain+3dB of additional gain. The moxon works very well for a compact footprint antenna, I have found that the feed point impedance and F/B ratio . initially adjusted within some sort of ballpark specification set. The rectangle, however, far exceeds other The weight of the feed line tends to keep the entire structure horizontal when pulled from the center. aluminum Moxon rectangle that we shall describe later on. providing coverage of CAP and MURS frequenciesalso Constructed of 1/2" and3/8" hard drawn 6063-T832 aluminum tubing, 32 dB in free space, respectively. The advertised forward gain for this antenna is 3.3 dBi and the . position reversible beam. W7JMP site (09/14/2014), GW4MBN'S very quiet rear quadrant. G6XN used a rectangle composed of two equal lengths of wire. 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. At 70' up (1 wl), the antenna shows a still different rear aspect, as Tuning up a Moxon rectangle--or adjusting the dimensions for other James Palmer, W7JMP SO-239 pigtail feedpoint. 2 meter moxonclick (01/09/2010), IK2CLB'S 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. 58 ohms at the design frequencies, a close match to the standard amateur Try to make the corners as square as possible. To those ends, I developed the antenna as a overall impedance. UV resistant PVC, and stainless steel hardware. In this situation, the beam would need to be fed using ladderline and a tuner would be required. (02/09/2009), KI6SZK'S The Moxon antenna is named for its creator, the late Les Moxon (G6XN). MOXON Antenna Project website webmaster responsibilities transferred from webmaster emeritus Steve "K6SGH" ( k6sgh.com); to James "W7JMP" effective 7/31/2021! 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