Dimensions of the fabricated double biquad antenna. It is easier to design a multiband quad antenna than a multiband yagi antenna. Jul 22, 2019 quad antenna design download file is only 2 mb in size. Quadband duallayer microstrip antenna design for mobile. Six meters arrl antenna vol 5 compendium contains an article i wrote providing details about two portable 6 meters antennas i developed, a twoelement quad and a threeelement yagi with telescoping elements. Table 1 shows an example output from the excel scaling program. Hardware bag when ordering parts, always give part number and description.
Figure 1 shows the dimensions and layout of the antenna and figure 2 shows the final, fabricated double bi quad antenna design. This means that the quad compares to a pair of stacked yagis as there is always some loss in the feed arrangements for stacking the two antennas. Quad antenna design is intended to help amateurs, students or engineers in their telecommunications development. Aug 22, 2017 cheap yagi antennas for vhfuhf by kent britain, wa5vjb download practical antenna design yagi uda antenna model yg 23 quad rectangular or diamond shaped fullwave loop antenna. The name quagi is a simple contraction of quadyagi. The pattern of left is for a twoelement 20meter quad 35 feet high 12 wave high.
H 3 2 antenna basics an antenna is basically a conductor exposed in space. This gave the antenna more gain than a simple quad. According to bob heil in his book, heil ham radio handbook, there were articles in qst and cq magazine showing how to build a 10 meter quad. Its coinductive secret was that it used a folded dipole to feed the quad. This up and over, over and down design had been used in hf wire antennas. All models are built using only the finest materials available, including but not limited to cast aluminum alloy spiders, and only the finest quality fiberglass spreader arms. If using it as a portable antenna each element can be quickly identified without having to measure. Using version 3 of his quad design program is very straightforward. The antenna has a total boom length of 4,21 meters and produces a 9,5dbi gain. The article is well written and includes some very good pictures of his antenna. All about cubical quad antennas the famous handbook on quad theory, design, construction and operation.
The name quagi is a simple contraction of quad yagi. The radiating elements double biquad shape were etched out of a copper layer on fr4, bent at 90 degrees. Click here g4aon has created a 4 element 6 meter quad based on using the same construction methods as my two element quad. The 3 element 2 meter designed for 146mhz quad in this project has a very small. A short boom, wideband, three element yagi for 10 meters. Returns will be accepted 30 days after purchase and must be in saleable condition.
Included standalone nectie app in main yagicad directory, also available from tools menu, that can import necmost nec2 and 4nec2 nec, yw. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. After conducting extensive experiments, hb9cv was so successful in simplifying the construction and design of the quad that he filed a patent application in 1960 for an entirely new concept of this antenna, and named it the swiss quad. The main category is antenna design calculators that is about antenna design calculators. Quad antenna javascript calculator for cb and amateur radio. However i highly recommend to follow my instructions, which are based on computer antenna simulation software 4nec2, to maximize performance. Added antenna notes window, via tools menu, for multilinelonger notes on a design. The antenna acts like a stacked pair on the vertical and a standard yagi on horizontal.
The 3 element 2 meter designed for 146mhz quad in this project has a very small footprint boom length of about 32 14 inches and according to the computer gurus out there, it has about 9. This antenna design has been built for both the ten and two meter versions and i have used them for thunting and in two cvarc field day events with good results. The radiating elements double bi quad shape were etched out of a copper layer on fr4, bent at 90 degrees. A quad antenna is a type of directional wire radio antenna used on the hf and vhf bands. Details of both my home three element quad and my portable quad are at figure 1 element dimensions relate to their total length, ie the sum of the lengths of the four sides. The uniqueness of the tey quad design is in have no capacitance or inductive matching networks that cut down on the efficiency of the quad. Here is an eznec plot and data summary of the 3 element 6 meter quad. For a highergain variation of the biquad thats virtually just as easy to build, have a look at the contruction details for a double biquad antenna. The cubical quad antenna calculator for citizens band cb radio and amateur radio communications to calculate the spacing between the reflector and driven elements and directors. Cubex acknowledges the significant contribution that john w4dj made to the graphics and. 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. The strongest signal produced from northern australia is from 43tr299 the 3 element above is the reason why. Jul 14, 2014 hence here is the double biquad antenna and biquad antenna calculators for handmade antenna based on average data. About quad calculator the resource is currently listed in in 3 categories.
The function of the calculator is to give all of the needed sizing to construct a good 5 element quad antenna for amateur radio use. The antenna calculator is a very simple and easy piece of software. Buy your mq36sr tgm six band three element hybrid quad antenna with dire from. Quad antenna javascript calculator for cb and amateur. Cubical quad antenna calculator in java script let you calculate elements size and. Quoting from william orr, whereas parasitic beams having twenty or thirty parasitic directors are efficient, high gain antennas, it would. This calculator provides quick estimation of antenna size required for a given gain and frequency. Antennas direct 4 quadloop uhf outdoor antennac4cjm the. I just replaced my original version quad with a new v3 version that is 30% smaller and almost as much gain. Cheap yagi antennas for vhfuhf by kent britain, wa5vjb download practical antenna design yagi uda antenna model yg 23 quad rectangular or diamond shaped fullwave loop antenna. This quad,fed by 2 coax lines, was able to work both vertical and horizontal. Sep 25, 2017 the x quad is an improved design of the well known multi element quads. Quad antenna design download file is only 2 mb in size.
In an effort to keep the price on maco antennas down, we have decided not to clean up all the burrs and rough. In a quagi the first two elements of the antenna are quads, the directors are all simple straight wire elements, as in the traditional udayagi design. Antenna software becomes useful when you are tired of the cut and try method. The fact that the quad antenna is effectively a pair of stacked dipoles, it offers a lower. If the length of the conductor is a certain ratio or multiple of the. A circular antenna is the best and has in a certain. Most often used with a parasitic loop direct or and a parasitic loop. In 1947, cubical quads began gaining popularity with amateur radio operators. This calculator requires only the entry of the center of the frequency range your quad antenna will be used in. The 2element quad has almost the same gain as a 3element yagi. Part of the successful translation of the design models to a physical antenna involves the use of high quality parts. 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. Until then design the antenna for a 1% lower frequency and inform me of the results.
Both antennas were designed for easy construction and quick assembly and disassembly. View and download maco antennas vq2 quad assembly instructions manual online. This may be a new antenna for tennadyne, both rog and norm i have been dealing with for over a decade. This link is listed in our web site directory since tuesday apr 18 2000, and till today quad calculator has been followed for a total of 61551 times. They are especially designed for amateur radio, with the following characteristics. The 2element quad has almost the same gain as a 3 element yagi. Durable easy to build 4 element 6 meter quad or 6n2 or 4 element 6 and 5 element 2 permanent or portable. Direct feed and tuning the antenna to resonant frequency gives the most optimal performance. It uses a single coax line to a homebrew antenna switch. Figures 2 and 3 show the calculated antenna patterns and performance.
Jpole antenna is pretty easy to build and usually designed by amateur radio operators through this software, you can easily find out four important parameters to build this antenna namely, radiator length, driven stud length, gap space, and feedpoint. Figure 3 shows my 4 element quad built with old moonraker 4 parts on a 40 foot tower. The quad antenna, sometimes called the cubical quad, is an antenna which is used. In this paper, a quadband, duallayer microstrip antenna was proposed. This provision is normally not a problem for quad antennas, but many hf and lower vhf. Ok well start with a specification of my present quad 2 element. You may download the spreadsheet using the following links. Antenna, ve3sqb ham radio antenna design software programs. Enter center frequency to be calculated for a quad.
There is nothing special about my sixmetre quad design but i have spent a fair amount of time tuning it up for maximum gain. The characteristic impedance of a loop depends on its shape. It is used to design jpole antennas for the desired frequency. 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. Maco antennas vq2quad assembly instructions manual pdf download. A fiveelement quad antenna for 2 meters by jim reynante. Due to the rapid acceleration and evolution of the wireless communication and their equipment, integrating more services in the personal devices, personal digital assistance pda devices has to work in multiband frequencies. Antenna calculator and design software electroschematics.
The swr measurements overlay the modeled curves in figure 4 too closely to need a new chart. I said you are limited on element spacing if you use my design moonraker 4 parts, because you will have to stick with the moonraker 4 element spacing s1 65, s2 56, s3 65. See below for the program information and a source to download it. Figure 1 shows the dimensions and layout of the antenna and figure 2 shows the final, fabricated double biquad antenna design. Rog puts these together as orders come in so be patient about shipping. Quad driven udayagi quagi antennas aa1zb on the web. The swiss quad antenna at zs6pp, september 1967 qst rf cafe. A 3 element cubical quad has more gain than a 3 element yagi. Returns processed will require a 20% restocking fee plus shipping. Using eznec 4, the free space model indicates a gain of 10.
However, adding quad elements produces diminishing returns. The xquad is an improved design of the well known multi element quads. Msdos antenna maker it allows to quickly calculate dimensions for quads antennas, yagi antenna, inverted vees antennas as well as jpoles and traps to. A cubical quad antenna is a four sided, square version of a folded dipole.
Jpole is a free and portable antenna design software for windows. The added gain over a two element driver reflector design is less evident than the improved fb. Mq36sr tgm six band three element hybrid quad antenna with. Pdf design and analysis quadband patch antenna for. Below you can find the dimensions for a 3el cubical quad. Avanti antennas produced a little quad called the pdlii. The gain of an an antenna with parasitic elements varies with the spacing and tuning of the elements, and thus for any given spacing there is a tuning condition that will give maximum gain this spacing.
The proposed antenna is suggested to be used in a mobile phone handset that covers four frequency. A quad antenna is typically a single wire formed into a square. Page e provides calculations for three different 3element yagi designs. Likewise, a 3 element quad has more gain than a 3 element yagi. Dimensions of the fabricated double bi quad antenna. Design and analysis quadband patch antenna for wireless communication. The cubical quad beam antenna offers about 2 db over a yagi of a similar length. I modeled his antenna in eznec and was delighted with the wide flat bandwidth, similar to an owa yagi. Cubex currently offers cubical quad antennas for 70 centimeters through 40 meters. Design log periodic antenna design excel sheet file download, in italian.
The antenna is basically a quad opened up on the bottom. All about cubical quad antennas the famous handbook on quad theory, design, construction and operation addeddate 20180207 17. The design impedance is 75 ohms, but i am feeding the antenna directly with 50 ohm coax, the measured swr is. The dimensions for the quad are based on a design by g0ksc3. Download quad antenna design assists users in designing quad antennas with an integrated calculator that helps enthusiasts properly place. I am also a big fan of quads, my low band quad is a old hy gain hy quad i purchased in the late 70s and is still going strong today. Moore describes his antenna as a pulledopen folded dipole. Quad antenna design has been tested by our team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean.
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