All you need to do is enter the desired resonant center frequency in the form below, then click calculate. This antenna consists of 3 moxon rectangles mounted on a boom. Academic platform journal of engineering and science 73, 424429, 2019. The correct lengths for the various models will be displayed in the chart. If we were working with a 40 meter yagi, the third element would add a considerable load on the mast and rotator. Collectively we have all drawn on the experience of les moxon, g6xn, and his work to transform the vk2abq 2 element. Elevation plot on 20m measurements to build a moxon 4 element. The moxon beam by dk7zb, moxon yagi, moxon antenna. The formula and basics of yagi antenna calculator are also explained with example. Figure 4a comparison of elevation patterns for 2element turnstiles crossed 2element yagis, shown in blue and a. A 3 element quad can be rotated with some extreme engineering. A simple fixed antenna for vhfuhf satellite work explore the lowearth orbiting amateur satellites with. John simpson, kg4zow download source code for this program. Maple leaf communications antenna calculator 3element yagi.
Compared to the moxon 4 element this antenna has one element extra between the two moxon s. The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. Compared to the moxon 4 element this antenna has one element extra between the two moxons. To help me in the selection process, i compared the 3element yagi to the 2element moxon. Works great and actually fits better in my side yard with minimal windload. Use our simple calculator to determine approximate dimensions of materials needed to build a 3element yagiuda antenna, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, coax, connectors, and other parts and accessories for amateur radio and other radio applications.
Design and build a 6 meter 2element moxon antenna mostly from available aluminum tubing and angle stock. 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 driverreflector design. Use our simple calculator to determine approximate dimensions of materials needed to build a 3 element yagiuda antenna, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, coax, connectors, and other parts and accessories for amateur radio and other radio applications. This beam is a 2elementyagi with radiator and reflector and reduced size to about 75% of. I made an experimental mono band moxon for 15 mtrs using some of the materials i intended to use. Sep 26, 2017 antennas tuned and checked with field strength meter and mounted. Although i am in an antennarestricted hoa, i am permitted a tv antenna, so the 6 meter beam surreptitiously replaced. This page covers 3 element yagi antenna calculator. The jk402t is a 22ft boom 2 element 40m yagi that has excellent gain and fr. First, determine the dimensions for the wire elements using the moxgen calculator, this software is available online for download.
The performance of the antenna, through the model, will be explored in several typical settings. Antennas tuned and checked with field strength meter and mounted. Preliminary build and tuning of the 6 meter 4 element moxon. Originally designed by les moxon g6xn, the antenna is stealthy and is an ideal solution for those whose space is limited or restricted, but also gives the user a directional antenna for a smaller footprint. For an overview of this antenna see the cebik article the moxon rectangle. The moxon rectangle is a 2element parasitical beam or unidirectional antenna about 70% the length of a full size 2element yagi of standard driverreflector design. Pdf moxon antenna array design and pattern synthesis technique. Hence, it may not print well unless you download it and print it out landscape. John simpson, kg4zow download source code for this program moxon algorithm and diagram are from awg conversion algorithm from.
This beam is a 2 element yagi with radiator and reflector and reduced size to about 75% of a normal beam. Dimensions 4,0 4,0 meter, weight about 3,0kg, gain 8,5 dbi. This antenna has a very good fb and bandwidth works from 27. The gw3ydx super moxon adding extra directivity to the moxon rectangle for 6m, 4, and 2m photo 1. The author isa keen enthusiast of the moxon rectangle antenna, invented by the late les moxon, g6xn. Elevation plot on 20m the wire antenna with connections for the rods and a coax connector female pl259.
As general information, the director is the shortest element, the driven element is the middle element in a 3 element beam and the reflector is the longest element. We can offer you this antenna in a compleet antenna kit for more information send us an email or look on. Assemble the spreader and lay out the elements, youre now ready to connect the feed points of the 3 driven element to the feed line. The rectangle, however, far exceeds other 2 element beams in fronttoback ratio, while almost equalling them in gain. This is a twoelement beam offering about 3dbd gain and massive 30db front to. The se20m can be also be setup for 17 meter operation by resetting the reflector and element spacer settings with an vswr of 1.
The real advantage of the 3 and 4 element moxon cell yagis. A moxon beam can be expected to provide approximately 5. Also they can have very stable illumination pattern across the. Band 2 3 element moxon antenna detail skywaves dx forum. The elements are loaded capacitively which shortens the overall length while still maintaining a good gain, fr across the 40m band. This is a world wide web front end for a public domain program written by w4vp9kf using php. The mfj1890 is a lightweight aluminum antenna designed to operate in the 10 meter band and we had hoped that with a little messing around we could get it to tune to the 11 meter cb band. Add i found another source for the calculator which gave different dimensions for a 90 mhz 2 ele moxon after a bit of playing an improved fb ratio and swr was achieved. Stumbled across a good moxon antenna calculator this morning which was created by paul evans w4vp9kf. Forward gain almost identical to that of a two element yagi but with better fb ratio. I put up diamond antennas for working satellites and returned the stressed moxon to the pushup mast.
Martin hedman s hemsida 40 meter mini moxon beam antenna at w7xa 3 element moxon dx antennas moxon antenna calculator stlfinder martin hedman s hemsida moxon beam antenna calculator new. A 2 element moxon antenna for the 15 meter 21mhz band. Amateur beam antenna calculator three element yagi. The result is a beam with a very broad beamwidth and a very high fronttoback ratio, with. You can readily see that the moxon has a wider beamwidth along with a vastly improved fronttoback ratio. Adding 10 meter moxon to a 3element 6 meter antenna qrz forums. The moxon rectangle is a parasitic 2 element array with the ends of each element folded back towards each other for additional coupling. 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 rectangle is a parasitic 2element array with the ends of each element folded back towards each other for additional coupling. Calculator 3element yagi maple leaf communications. A fourelement moxon antenna array is proposed in this paper.
Hi greetings, i have already started to construct a 3 element yagi for 40 metres but have not yet decided how i am going to match or feed the antenna, what is it you used, a gamma match with a tuning capacitor connected to it and what is the rectangular box the tuning capacitor goes on to before the 75 ohm coax. Indicative that there is some resilwnce to slight measurement errors. The following program will calculate the lengths needed to construct several popular wire antennas. A 3element quad can be rotated with some extreme engineering.
This program has been derived from a public domain basic program written by l. Vortex antenna systems radio communication antenna. The pvc items are readily available from the local hardware store and are very inexpensive. Top 10 surveillance mistakes to avoid when installing your security system for the first time duration. Stay here to learn how to design a 3 element yagi for whatever frequency or wavelength you want. Jk402t 2 element 40m moxon style capacitive loaded yagi. I raised my antenna to around 10 ft for tuning purposes, and measured the swr to be around 2. John simpson, kg4zow download source code for this program moxon algorithm and diagram are from moxon moxgen.
Jun 16, 2006 ok ive been operating with an inverted v for about 3 months now and haveing decent results. This antenna is made for the dxer or contester that is looking for an antenna to work across the globe. Although i am in an antennarestricted hoa, i am permitted a tv antenna, so the 6 meter beam surreptitiously replaced an existing tv antenna we no longer use. Page 3 of 22 acknowledgments this project to construct a vertical moxon antenna for the amateur 20m band was inspired by the work and experience of pete mills, m3kxz, and the moxon antenna project group. Jan 06, 2015 stumbled across a good moxon antenna calculator this morning which was created by paul evans w4vp9kf.
Forward gain almost identical to that of a twoelement yagi but with better fb ratio. Moxon g6xn in his book hf antennas for all locations rsgb publications, great britain 1993. The moxon is cheap to build and easy to rotate, although im a little concerned about where the coax is supposed to run. The 6 meter moxon is built from 5 8 inch od and 1 2 inch od aluminum tubing with 3 8 inch od solid aluminum for the corners. Having a few 10 meter openings, i wanted to explore the possibility of adding 10 meters to my existing 6 meter loopdriven 3element beam. Spacing is on the antenna bar holding the elements, with equidistant spacing from each of the outside elements to the. A 2 element moxon antenna for the 11 meter 27mhz band. Antenna design calculators category is a curation of 83 web resources on, parallel square conductor transmission line calculator, analysis of antenna mast strength and bending stress, full wave loop antenna calculator.
Construction of a 20m vertical moxon for use adjacent to salt. There is even a pcbased calculator that you can download. The back two rectangles were reflector, driven element and 2 directors like the super moxon antenna. Followers of this blog will note that i replaced the stressed moxon with the innovantennas 3element yagi in april 2015 then in july 2016, i replaced the cheap yagis and the 3element lfa. Essentially it consists of two metal or wire elements. Dimensions 4,0 4,0 meter, weight about 2,5 kg, gain 7,5 dbi. Nov 23, 2010 15 meter moxon beam in action moxon on top of the 20 foot painter pole extension moxon in the air note the pvc pipe that feeds the driven element with coax fishing poles glued to paint roller extensions, which mount into the moxon center moxon fishing poles and mast, 2. Wire antenna calculator amateur radio station ws6x. Heres the azimuth plots at 30 feet high with a 10 degree elevation angle.
Apr 20, 2017 having a few 10 meter openings, i wanted to explore the possibility of adding 10 meters to my existing 6 meter loopdriven 3 element beam. Jun 20, 2011 dimensions 4,0 4,0 meter, weight about 3,0kg, gain 8,5 dbi. Mhz, includes dimensions, antenna pattern, swr and antenna gain plots by wb5cxc. Driven three element yagi the performance improvement over a standard two element wideband yagi with the same boom length comes at a price an extra element and a phase line. This program has been derived from a public domain basic program written by. The program is based on an algorithm developed by l. The 2 element yagi with reflector has normally a 0,2lambdaboom and an impedance of 50 w. Adding 10 meter moxon to a 3element 6 meter antenna qrz. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1. I started this project after building my first mono band moxon for 15 mtr band. Antenna software 4nec2 graphs reported a gain of 15 dbi. Impedance is less sensitive to stacking and ground clearance.
The design frequency should be for a frequency from the beginning of the band. The result is a beam with a very broad beamwidth and a very high fronttoback ratio, with a gain similar to that of a standard 2 element yagi. A 6 meter moxon antenna discover 6 meters for the first time or enhance your existing operation with a rugged but portable version of this novel 2 element antenna. The moxon antenna was designed by les moxon g6xn and is an optimisation of an earlier australian design for a compact 2el beam. This antenna is made for the dxer or contester that is. The rectangle, however, far exceeds other 2element beams in fronttoback ratio, while almost equalling them in gain. The real advantage of the 3 and 4 element moxoncell yagis.