Are the nec files still available for download anywhere. The cubical quad antenna lends itself to use at vhf and uhf, and a 2 metre quad or two meter quad is easy to make using a few items that are easy to obtain or may even be available anyway. You could use 4nec2 software to make frequency and rh as constants and look for other variables for best results, but it doesnt worth a fuss. I like to combine the vhf and field day events with camping so my antennas need to be portable. Heres a solution with two alternatives for construction. The performance of this antenna has been superb to say the least. The quad reflector assures low angle of radiation even at low heights for real. Print without changing scale and contour will be correct size on paper.
It is a story about rq54l quad antenna installation on a rural position of ra9ftm radiostation. Switchable quadband antennas for cognitive radio base station applications. The list in software antenna analysis a curation of 109 useful links about software, antenna analysis software, for ham radio operators and hams. Quad antenna javascript calculator for cb and amateur radio.
Like a yagiuda antenna yagi, a quad consists of a driven element and one or more parasitic elements. Design and construction of a quad that will last steve root, kosr a 2element quad has fullsized elements. Continues to amaze me and out performs any antenna i have. Eli kovo, 4x4lh originally published in the iarc newsletter 082015 hagal and used with permission of the author. February 17, 2016 july 20, 2018 quadguy 2 meter cubical quad, cubical quad antenna leave a comment. The yagi is about 30 feet closer to the shack, and is nearer to the highway and power lines.
Qq190 4mm tank v2 x racing drone frame the qq190 tank v2 has been replaced by the twoelement quad for 20 through 10 meters want a small antenna that covers al the ham bands between 14 and 29. It should be remembered when considering its use that the quad, when fed at. A fiveelement quad antenna for 2 meters by jim reynante, kd6glfpo box 27856san diego, ca 92198 if your station is located on the fringe of the repeaters coverage area, youve come to the right place. Using a quad reflector with a yagi driven element, the y quad combines the advantages of both designs to give the best performing lightweight antenna available, with switchable polarity. Since its first introduction in the 1940s, the quad antenna has found uses in a number of areas. Jul 14, 2014 hey charlie, the only constant figure here is calculated to frequency. All of our antennas are hand built with the highest quality materials available. However i highly recommend to follow my instructions, which are based on computer antenna simulation software 4nec2, to maximize performance. A quad has a smaller turning radius that a yagi it has a lower noise level and a slight higher gain. The cubical quad or quad antenna has traditionally not been as widely used as its more popular cousin the yagi. A number of these quads have been built, using these formulae, with slight variations in wire diameter, but always using bare hard drawn copper wire. Five band, two element quad for 20 through 10 meters. How or why does a quad or any other antenna develop gain.
This chapter, by chuck hutchinson, k8ch, covers theory and construction of antennas for most radio amateurs. Ham radio antenna towers quad homemade electronics projects tours do it yourself consumer electronics. Summer contests are a great reason to get away from it all and enjoy the pleasures of amateur radio. The quad reflector assures low angle of radiation even at low heights for real long distance performance. In europe the hb9cv antenna is widely used in vhf and uhf portable experimentation but also in hf. Hf vhf uhf antennas for ham radio cb military commercial using. A quad antenna is a type of directional wire radio antenna used on the hf and vhf bands. Here is a useful cheat sheet converting vswr to the percentage of reflected power. This link is listed in our web site directory since thursday jan 11 2007, and till today cubical quad antenna calculator has been followed for a total of 3905 times. Download antenna find online radio stations from all over the world and listen to them with this application.
Describe your experience with the hybridquad antenna and tell us why you give it the rating you did required. All amateur radiorelated projects, tips, tricks, and tools. Horizontal or vertical polarization of an cubical quad antenna is determined by placement of the feed point feed gap on the driven element parasitic elements need to be mounted in the same orientation as the driven element. Eznec simulations of antennas and dual and quad antenna arrays. Design and analysis of microstrip biyagi and quadyagi antenna. The swiss quad antenna at zs6pp, september 1967 qst rf cafe. A circular antenna is the best and has in a certain.
A few fishin poles and a hank of wire can help you snag the big one. All have delivered the goods with no adjustment of element size, giving good gain, fb, and bandwidth. Always remember this when you see antenna models over earth given in dbi. Yquad cb radio base station, beam antenna dual polarity. Lets explore the cubical quad antenna, or quad, and see what it really is and how it really works. Cubical quad antenna calculator resource detail the. If youre looking to purchase a cubical quad antenna, youve come to the right place. With any antenna, gain only occurs from compression of radiation into a narrower area. Sep 03, 2007 this video is from the world of amateur radio. His location was a farm field in tennessee, back in the mid 1960s, so there was really not much in the way of obstacles to perturb signals arriving at one antenna versus the other, except of course when the direction of operation happened to. Earl, va6tj i recently came across an article in an issue of 73 magazine from 1978 raving about an antenna called the german quad which at that time was used by about half the hams in germany. Zelfbouw quadantennes een 50 ohm quad loop voor en 20 m hf skeleton slot, een antenne systeem met een verschil een 50 ohm. Im looking for the 5ghz nolips nec files specifically.
The technical support behind the antenna is excellent. If mounted on a guyed tower break up the guys every 3 feet by using egg insulators in the guy line for the top 20 feet of the guy cables. Pdf switchable quadband antennas for cognitive radio. Quad antenna design having successfully operated for many years with various types of three element beams, mainly for convenience, i decided to try and build a two element three band cubical quad. A light and sturdy quad for 10 and 15 meters fishin for dx. The characteristic impedance of a loop depends on its shape. Dec 01, 20 this design for a swiss quad antenna appeared in the september 1967 edition of qst magazine. Quad antenna javascript calculator for cb and amateur. Since a loop radiates broadside, concentric elements are not in each others way. The list in antennas quad a curation of 110 useful links about quad antenna, how to build a quad antenna for ham radio use. One of its touted strong points is not needing spreaders or a boom. Hence here is the double biquad antenna and biquad antenna calculators for handmade antenna based on average data. Free trial driver booster 6 pro 60% off when you buy antenna. Using a spider quad, such as the gem quad, is one way to ad.
Each antenna is on a separate telephone pole and the boom of each is mounted exactly 80 feet above ground. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. The biggest compromise with a 2element quad is in terms of boom length element spacing. Towers, zs6pp this antenna, designed originally by hb9cv, has not yet received widespread attention in the western hemisphere. Pdf a novel antenna configuration for quadband operation is presented. They are especially designed for amateur radio, with the following characteristics.
Compared to dl3isas 3 band 2 element antenna an improvement of 6 10 db was found in favor of the horizontal quad. A comprehensive guide to the construction, design, and performance of quad antennas haviland, bob on. Grave disappointment the objective is to make the antenna feed often followed. Measurements made by the designer indicate that its performance is superior to the conventional twoelement quad, while the structure is.
Horizontal or vertical polarization of an cubical quadantenna is determined by placement of the feed point feed gap on the driven element parasitic elements need to be mounted in the same orientation as the driven element. After my less than successful attempts on 6 meters with my collinear array, i decided to try another design that i had been looking at for some time. Similar to a yagi antenna, it usually possesses a driven element that sends or receives radio current through a feed line to a receiver or transmitter, and one or several parasitic elements, which modify the driven elements pattern, direction, and gain. It has a lot in common with the zl special, see w4rnl q hb9cv also transposed his feeding system to the 2element cubical quad, this allowed him grounding the both loops, a genius idea for a unique model, he called it swiss quad. A few of the antenna arrays discussed in this article have been constructed and used on dxpeditions to quoddy head and grayland. It is used by radio amateurs on the hf and vhf amateur bands. A comprehensive guide to the construction, design, and performance of quad antennas. The basic quad antenna element consists of a loop of wire a wavelength long in the form of a square as already described. Vhfuhf quad antenna the information in this article has come from many amateur sources, the most notable was from wa6tey sk 1985 ray frost, who was a pioneer of vhf quad designs and one of the best southern california transmitter hunters of the 1980s. I am not an antenna design guy, so i cant comment on its usefulness. Eznec simulations of antennas and dual and quad antenna arrays dallas lankford, 11232014 this article discusses how i have used eznec to design single antennas and dual and quad antenna arrays.
The main category is quad antennas resources that is about quad antenna, how to build a quad antenna for ham radio use. All of our antennas are hand built with the highest quality materials available and should give you many years of service. As with the yagi, parasitic elements can be added to make the antenna more directional. Design and construction of a national contest journal. Since its first introduction in the 1940s, the quad. Using a quad reflector with a yagi driven element, the yquad combines the advantages of both designs to give the best performing lightweight antenna available, with switchable polarity. Eznec simulations of antennas and dual and quad antenna. The x quad is an improved design of the well known multi element quads. The other measurement dl3isa made was between the horizontal quad and a. The dipole is the basic building block of many antennas. Here youll find simple verticals and dipoles, as well as quad and yagi projects and other antennas that you can build and use. The quad antenna is a type of directional antenna that typically has its elements configured into foursided square loops. Many months were spent searching for the best model dimensions shown in various antenna handbooks, and information found on the internet. Very quick shipping from georges who is very kind to think about us, cbers.
All about cubical quad antennas the famous handbook on quad theory, design, construction and operation. I emphasize once more, that if you use insulated wire, or bare copper, different to what i have used, the above measurements will not be correct. Quad antenna design is intended to help amateurs, students or engineers in their telecommunications development. A fiveelement quad antenna for 2 meters by jim reynante.
Like the yagi antenna the quad beam only ever has a single reflector, although more than one director provides additional gain. However the cubical quad beam antenna is able to provide some advantages in a number of circumstances. Pdf switchable quadband antennas for cognitive radio base. About cubical quad antenna calculator the resource is currently listed in in a single category.
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