The correct lengths for the various models will be displayed in the chart. Calculations for the wire lengths can build a multiband hf fan dipole. The long end was tied to a tree, again, using insulated rope, and with maybe five. Calculations for the wire lengths can be found easily online. The most widely used formula to calculate the approximate overall length of wire required for a dipole is. A shortened fan dipole is a dualband dipole with a fullsize dipole also tied to the same center insulator. In the drawing above, it is shown for just four bands, 80 thru 10. That was one of the criteria for the original poster, which i thought was clear from the title free software for simple dipole antenna simulation perhaps i am missing something, but the original poster asks for simple free software, but people suggest hfss, cst microwave studio and antenna magus.
These antennas are also known as wideband dipoles as an example, method of moment simulations will be performed on dipoles of length 1. It was written for dos many years ago and ported to win32. Dipole antenna length calculator dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz.
Online calculator folded dipole calculator changpuak. Open the dipole length calculator in a separate page. This app does nothing more than the standard 468freq mhz type calculations. Each element is individually tuned to one of the desired bands. How to use mmana antenna software 4 lessons film dx. Building a multiband hf dipole antenna dipole antenna, ham. Ive since been able to buy a stash of 15mm wide clear acrylic pieces in 50mm, 100mm, 150mm and 200mm lengths which make. All you have to do is run the program and input your design frequency in the white window top. Hf linked dipole may 5, 2016 february 8, 2019 this is a really versatile aerial for portable operating and is also quite simple to make its a 40m invertedv dipole but with the wires cut at certain points with crocodileclips soldered onto each piece of wire end. The kj4iif multiband fan dipole for 160, 80 and 40 meters. Multiband hf fan dipole antenna construction today we build a multi dipole array that will work on 80402015 without a tuner. As an example, method of moment simulations will be performed on dipoles of length 1. Wire antenna calculator amateur radio ham radio station ws6x. Antenna calculator and design software electroschematics.
Antenna calculator length of the dipole antenna calculation. The previous calculator used here and most other calculators found show the inverted v antenna legs as being shorter by 2 5% based on the angle when really they should be longer by 2 6%. The antenna consists of a regular 40 meter dipole using a. There were two versions of the fan dipole back then. Build this multiband fan dipole for all band hf antenna excitement here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. A v dipole is simply a dipole antenna spread at 120 degrees, placed horizontal to the ground, and typically oriented in a northsouth direction for receiving weather satellites. Fandipole is a multiband wire antenna category is a curation of 18 web resources on, wa2hip fan dipoles, qrp fan dipole, multiband fan dipole antenna. Multiband hf fan dipole antenna construction k3rrr kilo. The most common dipole length is half the wavelength. All of the individual dipole elements in the fan dipole share a common feed point. A very basic program for calculating the length of each leg of a 12 wave wire dipole antenna. I learned the hard way by working through every section of the software and joining the mmana yahoo group.
This formula to obtain the length of a halfwave dipole antenna will give a good ballpark value to start with. It can be constructed a variety of ways, but figure 2b shows the technique i used to build my first antenna. The height is limited only by the nearest tall tree and the cost of the antenna is minimal. Jetstream jtfan8010bk fan dipole kit this dipole kit may be assembled to cover any 4 bands. This app is intended for aiding in the design of simple wire dipole antennas for 1 30 mhz. You could use the calculator to build a 75 or 80 meter dipole and then calculate an inverted vee for other bands higher in frequency, suspended under it as shown in the drawing above, from the same support and feed both with the same line to xmtr. A fan dipole above consists of multiple dipoles, each cut to a different length for a different band and spaced a few inches from each other. With a tuner, it should load up just about anywhere and might even work. The complete set of equations is expressed in the mathematical relationship below as eq. For example, the 80 meter dipole ran north to south, the forty meter dipole ran north east to south west, and the ten meter dipole ran from east. Download hf dipole calculator 12 wave wire dipole antenna. But once you get it set, you can just enjoy the automatic antenna selection feature of the fan dipole.
Multiband fan dipole click for a larger image and more details. Enter a length between 1 and 500 feet distance from center of antenna to the center of the coil in feet must be less than half the total antenna length given above enter a distance between 0 and 250 feet that is less than half the total antenna length. A ham radio antenna project with plans, pictures and parts list to help you build a fan dipole. I have built so many fan dipoles, i have now forgotten most of them. The purpose of building 2 was to have an eastwest broadside and a northsouth broadside on the dipoles. When fed with open wire type feed, it becomes a multiband antenna using a tuner. All you need to do is enter the desired resonant center frequency in the form below, then click calculate. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole. Hf dipole antenna design software electronic circuits. Older cut and try method here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. I built a multiband dipole that will work 40, 20, 17, and 10 meters for ham radio.
The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. My qth is a first floor flat in a converted victorian detached house with little room and no permission to erect external hf aerials so my only option is the attic. How to use mmana antenna software 4 lessons film antenna design using software modelling need not be difficult particularly if you can watch 4 quick tutorial films to assist. A fan dipole is a similar antenna to this, except that the elements on each end are spaced at an angle to the others. Lets see some antenna calculator and antenna design software that will help you design faster and better. As i have never seen a commercial dipole for these bands, i would like to build one. A fan dipole for the final application that is described here would be mechanically complex, and less likely to stay up in an ice storm. Now, as others have said, there is some interaction between the fan dipole s wire elements because of their close proximity to one another. Hence, a dipole antenna can be made more broadband by increasing the radius a of the dipole.
At dc, a folded dipole is a direct short across the feed point, while a conventional dipole is an open circuit. Even zip cord such as what is used for lamp cords will perform quite well. A good example of this would be a standard 40 and 160meter dualband dipole 2b4016 and an 80meter fullsize dipole in an inverted vee configuration with the same common feed point. The wirelength on this 40m version is actually about 12m per leg. At this length, the dipole is a halfwavelength long at 100 mhz. Always arrange the dipoles with the lowest frequency band first, on top, then the next higher frequency band under it and so on. This calculator uses a k multiplying factor value of. The connections should be soldered and all should be sealed including coax end.
The longer elements should be trimmed before the shorter ones. See more ideas about dipole antenna, ham radio antenna and ham radio. Multi band hf fan dipole antenna design hamuniverse. This configuration, known as a doublet, will work well as a multiband antenna. The multiband fan dipole has always been a popular antenna choice for getting on several bands with a single feedline and without the need for an antenna tuner. Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. The free end of each wires are pointed towards opposite direction of the other free end.
When the legs of a horizontal dipole antenna are slooped, the resonant frequency of the antenna is increased, therefore to bring the antenna back to. One fan dipole was for 754020 and the other was for 2015. To calculate the length of a fullsize dipole, use the dipole antenna length calculator. A halfwave dipole is usually fed at its center because this is where maximum current occurs. Enter the desired frequency and select the desired calculation from the drop box.
The bottom dipole of the multi band dipole is cut for 40 meters with a center frequency of 7. This online calculator can be used to find the length of the dipole antenna. When compared to the planar dipole, the folded dipole structure increases the input impedance of the antenna. Remember, all the weight of this antenna system is supported by the top wire. The built in tuner in most good modern solid state transceivers is adequate to match this antenna without the. I have heard from others who constructed fan dipoles that trimming one element may affect the vswr on the other elements. Offcenter loaded dipole antennas qst magazine, september, 1974. Program good for 1 500 mhz, although intended for mf hf useage. The fan dipole antenna also known as parallel dipole antenna or fanned dipole antenna is a multiband wire antenna tha can be very easy to build this antenna consist basically of multiple dipole antennas, sharing the same coaxial feed line each dipole should be cut for the approximate centers of the bands where you would like it to resonate. Also part of the software program hfta high frequency terrain analysis. Dipole antennas are used alone and as parts of dipole arrays. Fan dipole is a multiband wire antenna category is a curation of 18 web resources on, wa2hip fan dipoles, qrp fan dipole, multiband fan dipole antenna. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. Use 75 or 50 ohm cable to feed the centre of the dipole.
Dipole antenna calculator electrical, rf and electronics. The socalled ocf windom is also a misnomer, for the same reasons. This is a program i wrote for a local dx club, the central california dx club. These 2 dipoles are at right angles to each other and the 2015 dipole is located about 6 feet below the 754020 fan dipole. This is a simple dipole built for twoband operation that i made for portable use with my 20 and 40 meter qrp rigs. The following program will calculate the lengths needed to construct several popular wire antennas. Discussion of construction of homebrew 60301712 fan dipole. Of course if 40 is included you will get 15 meters as well giving you 5 bands. This is usually called a fan dipole and works well when tuned for lowest swr. The feed point of the dipole coincides with the origin. Today we build a multi dipole array that will work on 80402015 without a tuner. The measurements below are for building a simple dipole antenna.
If you have a longer garden, you can move the pigtail join further back the return wire. Dipole, inverted v and ground plane antenna calculators. My thought is to start with a alphadelta delta c and a commonmode choke at the feedpoint and then cut the wire for each of the bands. Making it a resonant antenna for all bands from 80m to 6m except warc bands. Having a small garden or none at all, need not be a problem if you want to work dx as i have discovered. The 7 band ocf dipole antenna was erected at 25 to 30 feet, on a hill side, using a military style push up mast, with a few customization on it. Wolverhampton amateur radio society m0wym fan dipole. Multiband hf fan dipole antenna construction youtube. On the other hand, an ocf dipole is an ungrounded dipole antenna fed with twinconductor line, either coaxial or open wire parallel conductors. Each wire has one end connected to antenna and the other end is left free. How to build a fan dipole amateur radio antenna field day. As a followup, ive now built and hoisted the fan dipole. The results are conveniently displayed in inches, centimeters, feet and meters.
The fence fan dipole ffd a quick, easy and inexpensive multiband antenna. The built in tuner in most good modern solid state transceivers is adequate to match this antenna without the use of an external matchbox. Data from the arrl antenna book, dean straw n6bv editor. Building a multiband hf dipole antenna dipole antenna. Several dipoles with different lengths, each of which is resonant on a different band, can be connected together at a common feed point and fed with a single feedline. The dipole antenna is the simplest and most widely used in radio communications since the beginning of rftechnique.
Dipole antenna calculator, free dipole antenna calculator software downloads, page 3. The first version was each dipole was the horizontal spread. The current configuration of the wires are as follows. I have it suspended from the center feed point rf choke and from the ends at about 40 feet.
Total wavelength refers to a single wire dipole in freespace and is theoretical. Over on thingiverse user f16v1per has created a 3d printed bracket that can help with securely holding our multipurpose dipole kit at a 120 degree angle, which is the perfect angle to use when in a v dipole configuration. Dipole antenna calculator software free download dipole. The podcast is 22 minutes long, and in that time he discusses eshail2, a geosynchronous satellite with an amateur radio transponder that was recently launched and activated, some of his favorite recent posts from our blog here at, including posts about a 3d printed v dipole holder, radwave rf analyzer, cloning 433 mhz devices, and. Ham radio 40 20 15 meter half wave fan dipole antenna. Any dipole antenna consists of two identical elements in the form of metal rods with the feedline between them. The other multiresonant dipole is known by many names. Im not in possession of antenna modeling software at this time, but has anyone tried modeling fan dipoles with various elements. The spreaders can be made from any nonconductive material such as pvc conduit pipe or you can use ladderline and make the whole lot from 1 piece of cable. This makes the tuning of a fan dipole somewhat more labor intensive than a single band dipole. Multiband dipole i built a multiband dipole that will work and 10 meters for ham radio.