Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. Each antenna design software is slightly different from each other as each software design some specific types of antenna. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. This design can then be optimised or scaled to suit particular requirements. A boom length of 2 wavelengths or 10 elements would be a minimum sized antenna. The antenna has been optimized for good fr and swr performance across the 6meter band. This basic question led to others, including perhaps the most fundamental of all. Yagio runs under windows 2000, xp, vista, win 7 and likely win 8.
This link is listed in our web site directory since sunday feb 1 2009, and till today dl6wu long boom yagi design tools has been followed for a total of. Download yagi designer software for windows for free. The design here has three elements, but uses a boom less than 36 inches long. Dl6wu long boom yagi design tools resource detail the. Note that the boom is the long element that the directors, reflectors and feed elements are physically attached to, and dictates the lenght of the antenna. The length of the coaxcable should be about 40cm not critical. I designed a yagi antenna using 4nec2, assuming that i would use a non conductive boom. Long yagis are commonly used from the 144mhz amateur band to the 2. This 7 element 6m yagi gives you tremendous performance with very high gain on a 30ft boom.
This calculator is designed to give the critical information of a particular beam antenna, in this case a three element yagi, for the frequency chosen. Some are based on lookup tables, some completely hide their algorithms. As an example, consider the table published in yagi antenna design by p viezbicke from the national bureau of standards, 1968, given in table i. In the past, gain was really equated with the number of elements a yagi had.
Yagicad is a fully integrated analysis and design package primarily intended for vhf yagi aerials. Here seven bulletproof yagi, from 3 to 8 elements, from 2. This page documents the various long boom vhfuhf antenna designs that i have created. Some aspects of longboom, monoband logcell yagi design. All are designed with one goal in the mind, to maintain a solid gain and fb and swr ratio over the band. The main category is antenna analysis software that is about software,antenna analysis software, for ham radio operators and hams. Yagio allows you to create dl6wu long yagi antennas on any frequency, typically on vhf and uhf ham frequencies. Looking back at the articles he wrotethis may explain why he omitted the very popular 2m band in his august 1977 vhf yagi article. The elements are reasonably small, but not so small that building tolerances are critical.
Yagi design basics _____ the yagi antenna has been with us for more than half a century now, but. To obtain higher gain and a shorter boom, you might turn to a driverdirector yagi design. Figure 2b shows the radiation pattern for a 24 element 1296 mhz design. Consequently, before we freeze our design decisions, lets look at the basic wideband 3element yagi design a little more closely.
As is standard windows practice, doubleclick on the filename to open it, or singleclick on it and select open. This high gain 19 dbd antenna is relatively lightweight, inexpensive, and very portable it can be rolled up for transport. Yagio is similar to lpcad, it uses keyboard commands instead of a mouse menu. The study of yagi antennas on the computer has produced some outstanding new yagi designs and shed some light on the key dimensions of yagi performance. Freespace dimensions for the 144mhz yagi family element diameter is 1 4 inch. Education software downloads yagi designer by goforth laboratories and many more programs are available for instant and free download. If i use an aluminum boom but i insulate the elements from the boom, can i keep the same design. When the 15element quagi was designed, the longboom quagi is elegant in its simplicity. Long boommonobandlogcellyagidesign identifierark ark. There is a single driven element driven in the center consisting of two rods each connected to one side of the transmission line, and a variable number of parasitic elements, a single reflector on one side. This window includes all of the information on your antenna design and a simple graphic showing the design, as well as overview.
With the gain optimised yagi, vhf amateurs would normally refer to the yagi of a certain boom length that has more gain than all other yagis on the same or shorter booms. Vhfuhf long yagi workshop if you want a topperformance vhfuhf long yagi, why not build it yourself. The older quick yagi program was used in its design. For a given element diameter, find the yagi with n elements that gives more gain than any other design. Download the zip file here if you are in a hurry or read the introduction below. Long yagi 4 elements antenna designed by 1 cm 062 op. Ve7bqhs gt values are given for 4 bay arrays with specific boom spacing. Some are entirely new designs and others are optimized versions of popular ham designs. Computer modeling has shown that boom length is the real factor that determines gain. The design criteria you have posted is very similar to what i have developed using yw. Anything is scaled to 11m from the 10meter arrl project.
Yagi has a boom of two pieces, therefore no part is longer than 1m. Here is a list of best free antenna design software for windows. They can be made using various materials and in varous sizes. Yagi antenna design program by wa7rai called quick yagi qy4 this 6 meter 6 element ssb yagi was designed and optimized for best feed match using 50. The most yagis have an impedance of 50ohms and are fed with a lambda4choke for 2m and a 34lambdachoke for 70cm. Joe w1jr told me that hams that would modify his 2m yagi design to fit a 12 boom and complain to him that the design was no good. The overview window is the default tab selected when the program starts. Each band has its own reflector and director elements. Using this program i have designed a 6 element 2 meter beam that is 7. Longboom monoband logcell yagi design internet archive.
A good design tool for this is the yagi calculator written by vk5dj. Use a screwdriver and pliers to release one wire from beneath one of the rivets on the 58inch element. Ve7bqh 144 mhz long yagi construction details the ve7bqh 43 element long yagi for the low end of the 2m band. Radiation pattern shown is typical figure8 pattern. With yagicad it is possible to enter a base design from scratch or use one of a number of saved well known designs. A simple 4 element 2 meter yagi made from coathangers or. Sm 5 bsz computer design of very high gain yagi antennas. It is quite possible, that other calculators deliver slightly different results. A simple 4 element 2 meter yagi made from coathangers or other common materials by pete rimmel n8pr. Yagi calculator is a windows program that also runs well on linux, ubuntu 8. It is a 2m 144148mhz designed to be a portable vhf uhf not mounted on a mast. The optimized designs are typically popular vhf long yagi. Rule out old yagi designs constant element spacing not a good indication of modern design. Enter the desired frequency then click on calculate and the optimum values for that combination will be displayed in feet, inches and fractions of.
Figure 2 shows its outline, while figure 3 is a photo of the prototype beam. Vk3dips yagicad will calculate a similar gt for a single yagi system. The yagi uda antenna consists of a number of parallel thin rod elements in a line, usually halfwave long, typically supported on a perpendicular crossbar or boom along their centers. Please limit output power to no more than 10 watts when using the duplexer. The antenna comes with our high quality, heavy duty materials and hardware. Nec model library the following files and links point to necaoyo models of various ham antennas that i have simulated andor tested over the past 30 years as an antenna designer. It can be mounted for vertical or horizontal polarization. Table 11 table 12 specifications for the 144mhz family. About dl6wu long boom yagi design tools the resource is currently listed in in a single category. The long boom six is a unique design thats only available from wolf radio. With careful construction and detailed instructions, it is certainly feasible to build notune yagis up to 432 mhz, but i have my doubts about 903 yagis. We have confirmed that it does work fine on windows xp. Indonesia, about 10 am a morning i was beaming long path towards the east.
Most of the long boom antennas shown below are what i consider to be very high performance yagis. In the following notes, i shall try to develop the major parameters of long boom logcell yagi design. Rf homebrewing a 6 meter yagi by zack lau, w1vt six meters is a great band for home built yagis. On the other hand, yagis with as few as 8 elements have used the design and worked very well. Fig 2the common dialog window for selecting a yagi file. To create a wideband 3element yagi requires more boom length for a given gain than used in the. Yagi calculator yagi calculator is a windows program that also runs well on linux, ubuntu 8. This is the model with the internal duplexer and comes with cables to connect to a radio with a bnc connector. A good yagi design is as easy to build as a poor one. Feeding a dualband uhf and vhf yagi antenna amateur. It turns out that this problem is well solved by the simpler problem. Specifications for the 144mhz family beamwidth stacking.