The dual bi quad antenna, also known as the bowtie antenna is a directional antenna ideal for use with mobile phones for umts, g2, g3, g4 and wifi equipment. G0ksc simple to build, high performance yagi and quad. The antenna is basically a quad opened up on the bottom. N4ujw antenna design lab ham radio antennas design 0r. Yagio runs under windows 2000, xp, vista, win 7 and likely win 8. Uhf circularly polarized directional antenna estimated cost. Building a 4 element cubical quad iw5edi simone hamradio. If tuned for maximum gain, the bandwidth for a 3element cubical quad antenna is limited. In the rst section, a brief overview of the literature on dual and quad ridged structures is provided. Cubical quad antenna calculator in java script let you calculate elements size and spacing in inch and meters. The fact that the quad antenna is effectively a pair of stacked dipoles, it offers a lower. The radiating elements double bi quad shape were etched out of a copper layer on fr4, bent at 90 degrees.
Quad antenna javascript calculator for cb and amateur radio. 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. The cubic quad is a very popular way to get reasonably high gain and excellent front to back ratios as well as low angles of radiation for without going to extreme heights. Antenna calculator for hf antennas ham radio secrets. Yagicad is a fully integrated analysis and design package primarily intended for vhf yagi aerials. However i highly recommend to follow my instructions, which are based on computer antenna simulation software 4nec2, to maximize performance. This link is listed in our web site directory since tuesday aug 21 2001, and till today magnetic loop designer has been followed for a total of 14076 times. 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. This type of antenna is quite similar to yagiuda antenna but instead of using a straight element, this antenna uses a square, round, or some other shaped closed looped elements. The antenna acts like a stacked pair on the vertical and a standard yagi on horizontal.
Professional design software hfss is used to design and optimize the antenna and matlab codes were written to determine. W8io antenna modeling, yagio, long yagi antenna design. Long yagis are commonly used from the 144mhz amateur band to the 2. Figures 2 and 3 show the calculated antenna patterns and performance. Enter the required frequency in mhz and the antenna designer will calculate the dimensions of the elements as shown below. All dimensions appear in the table on the right hand side. Biquad and double biquad antennas, as well as diy kits for building your own antennas are also available from biquad supply.
Using version 3 of his quad design program is very straightforward. The standard quad is designed from the textbook equations and is compliments of roger clement kc5lca. Usb icom civ interface milstd188 interface radio hobbyist products 22m part 15 beacon kit cw keyer for beacons kit jellyfish transformer cyclops antenna transformer general interest programs atomic macpc audiocorder. Enter center frequency to be calculated for a quad. Included standalone nectie app in main yagicad directory, also available from tools menu, that can import necmost nec2 and 4nec2 nec, yw. Double bi quad antenna dimension calculator back to antenna calculator overview. In the past several years, especially in the vhf uhf community, a new somewhat confusing method of rating antennas has appeared on amateur radio websites. The skyhopper was named after the first one was compared to a grasshopper.
The quad antenna is a development of several inventions. They are especially designed for amateur radio, with the following characteristics. The reflective surface can be any conductive material, i have heard that even cds work as effective reflectors. Note that frequency is measured in megahertz mhz and the total length of each element is measured in feet ft. The simulation has been performed by zeland software version 14. We can clearly see the gain of two broadside elements 14 wave apart is barely over 1 db, and this is what the antenna models using modern software show. The initial approach of and the software tools developed for. Dish antenna design, free dish antenna design software downloads.
Design, analysis, and fabrication of quad ridged horns this chapter focuses on design and analysis of quad ridged horns achieving nearconstant beamwidth over multioctave bandwidths. This article, part 2 of a twopart series, explains how the latest software can facilitate antenna design for the radar systems needed for nextgeneration cars and trucks. Design and analysis quad band patch antenna for wireless communication. Aug 22, 2017 well on every vhfuhf frequency i tried. The most popular book on antennas ever written, widely known as the antenna builders bible, joseph j. The antenna calculator is a very simple and easy piece of software. Figure 5 the radiation pattern of the antenna on the left is a 4 element quad feed directly with coax.
Antenna project contributions are from all over the world. Antenna magus is a software tool for the acceleration of the antenna design and modeling process. This calculator requires only the entry of the center of the frequency range your quad antenna will be used in. If you have no particular preference within a given ham radio band, then simply enter its center frequency i. 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.
The prototype for 2 meters made its first contact of over 200 miles while lying upside down on a picnic table. 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 dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. Apr 30, 2016 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. Added antenna notes window, via tools menu, for multilinelonger notes on a design. Antenna design programswith surface mount technology and microcircuitry, most hams no longer build their own equipment. The nec2mp engine will speed up computation tremendously in dual and quad core pcs. Quad antenna javascript calculator for cb and amateur. Ok well start with a specification of my present quad 2 element. The quad antenna is without doubt the best dx antenna available.
With yagicad it is possible to enter a base design from scratch or use one of a number of saved well known designs. More antenna material means more capture area is in the air. Rf toolbox dipole, yagi, vertical, cubic quad, log periodic. Any good commercial vswave an tenna, small yagi or homebrew vhf uhf quad can beat this antenna at gain on a given design frequency, but none of these will band vhf antenna.
Emmcap software for modeling of arbitrarily shaped wire structures and the computation of their electromagnetic behavior, including radiation and scattering. Design your vhf yagi antenna online, a javascript enhanced web page that implements the design of an antenna in the vhf, uhf by k7mem. Figure 1 shows the dimensions and layout of the antenna and figure 2 shows the final, fabricated double bi quad antenna design. Table 1 shows an example output from the excel scaling program. Count on design software for millimeterwave automotive radar and antenna system development, part 2 no question, automotive radar technology is reaching new heights. However all antennas are scaleable by nature, so if you design a 4 element hitech yagi on 2 meters with 12 db gain, it translates directly into a 12db gain 4 element yagi on 20 meters. It has a higher gain than any other antenna of similar dimensions and is also very cheap to construct. About magnetic loop designer the resource is currently listed in in a single category. Meaning youll have a better chance of hearing someone on a quad antenna versus a yagi antenna, and this isnt considering the noise advantage of the cubical quad which i will speak about a bit later. 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. The x quad is an improved design of the well known multi element quads. This up and over, over and down design had been used in hf wire antennas. Count on design software for millimeterwave automotive. The cubical quad beam antenna offers about 2 db over a yagi of a similar length.
It uses a single coax line to a homebrew antenna switch. One area that is still open to amateurs is in antenna building. In 1924, moses jacobson patented a loop antennas with rhombic shape. The list in software antenna analysis a curation of 109 useful links about software, antenna analysis software, for ham radio operators and hams.
So anything design advances done on 2 meters or above are completely valid on the hf bands. The characteristic impedance of a loop depends on its shape. 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. This calculator provides quick estimation of antenna size required for a given gain and frequency. Every element of a cubical quad antenna is a full wavelength long. D is the distance from the dipole to the reflector.
The name quagi is a simple contraction of quad yagi. The w8io antenna site yagio software 23 march 2016 yagio yagi design by w8io. Antenna designing software instructions to build a beam for 40 m band. Design, analysis, and fabrication of quadridged horns. However, if you find this software useful please consider making a donation here. Antenna, ve3sqb ham radio antenna design software programs. Rick adams makers of cubical quad spiders for cb and ham radio use. A circular antenna is the best and has in a certain. Free radio frequency software, antenna design and calculators. Tbd a less common type that are circularly polarized.
First you can taylor it to the needs of your communication local or dx and optimize it for the frequency you talk on and to the needs of your environment make it strong if you live in a harsh one where ice and wind is a problem. Lets see some antenna calculator and antenna design software that will help you design faster and better. 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. Quadband base antenna or not n6pet my ham radio journal. Myers engineering providers of original and custom antenna design, antenna engineering, and antenna development and manufacturing services. Having had a gem quad hf 201510m for a few years, back in the early 80s, i can testify to the quad s slight advantages over a tribander yagi with the same number of elements.
This kind of antenna looks similar to a biquad but works like a quad antenna. The frequency scaling formulas for cubical quad antennas are shown in this picture. Dish antenna design software free download dish antenna. The quad at very best barely has 1 db gain over a dipole, and at worse has loss. The webmaster does not read the comments regularly. It can be constructed from any common household copper wire 22.
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. Use these antenna design software to design and analyze antennas of. The spacing of each element is the same and all directors are the same size. One of the greatest advantages of the quad is that it exhibits a lower angle of radiation than a yagi at heights of less than one wavelength. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. However, lengthening the director elements, thereby sacrificing approximately 1 db. So whats new in 2020, in ham radio antenna designs. Can be interfaced to hfwin32 propagation prediction software. Mininec for windows is antenna modeling tool for the novice, student and hobbyist.
When using a biquad to establish a link to another wireless device, you should ensure the polarisation of the biquad is the same as the antenna you are connecting to. Quad antenna design is one more free antenna design and analysis software for windows. Direct feed and tuning the antenna to resonant frequency gives the most optimal performance. Assists users in designing quad antennas with an integrated calculator that helps enthusiasts properly place the hardware device to receive the best signal available quad antenna design is a small tool designed to help antenna enthusiasts build quad antennas. Rf toolbox dipole, yagi, vertical, cubic quad, log. Order practical antenna handbook with cd rom by joseph j.
For information on connecting a biquad antenna to a wireless radio, have a look at the page on using wireless antennas. For a hundred years the amateurs have made more breakthroughs in antenna design than the professionals. Emmcap software for modeling of arbitrarily shaped wire structures and the computation of their electromagnetic behavior, including radiation and scattering problems. Msdos antenna maker it allows to quickly calculate dimensions for quads antennas, yagi antenna, inverted vees antennas as well as jpoles and traps to. Yagi calculator is a windows program that also runs well on linux, ubuntu 8. Download quad antenna design assists users in designing quad. Quad antenna is a type of directional wire radio antenna mainly used on the vhf and. Most often used with a parasitic loop direct or and a parasitic loop. Carrs practical antenna handbook, third edition is a work for anyone, ham radio operators, shortwave radio listeners anyone with an interest in antennas, from the newest of novices to the. Most are designed for ease of construction and expense. The main category is antenna analysis software that is about software, antenna analysis software, for ham radio operators and hams.
Almost identical in design with comets uhv4, there was a slight difference in length and loading coil. The radiation pattern of the antenna on the right shows a quad using a device balun, gamma match etc. The antenna looks a bit like a corkscrew and can be either lhcp left hand circular polarisation or rhcp right hand circular polarisation. Quad antenna is a type of directional wire radio antenna mainly used on the vhf and uhf bands. The list will grow with your help so lets start and share the knowledge. Dimensions of the fabricated double bi quad antenna. Deviation from the design frequency will unbalance the nearresonance condition of the parasitic elements. Here is a simple antenna calculator for two popular forms of ham radio hf wire antennas. This design can then be optimised or scaled to suit particular requirements. There are many reasons you should considering building your own antenna. However hro had another quad band antenna, the diamond hv7a.
Antenna design freeware 1d and 2d arrays from mei software. It wont be easy to handle this piece of software without some proper. Please post a comment if you know other great software or links with information about antenna calculator and design programs. Calculate the required dimensions for a collinear dipole antenna construction for any given frequency. The list in antennas quad a curation of 110 useful links about quad antenna, how to build a quad antenna for ham radio use. You just set the frequency for which you want to design a quad, indicate the number of elements, the wire size, and choose the type of gain you want. Pdf design and analysis quadband patch antenna for. The kit contains all the precut and predrilled parts required to build a biquad antenna. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz. A quad antenna is typically a single wire formed into a square.