2 meter dipole design software

Yagi calculator is a windows program that also runs well on linux, ubuntu 8. The goal here is to put up a cheap, easy, and quick 2meter antenna that is simple and unobtrusive, but works. This antenna is ideal for ionospheric radio wave propagation. Make a 40 metre loaded dipole amateur radio tips and howto. Ver2calwireantenna actuallyaver2callyorientated resonate12wavedipolewith theearthbeingthe return half duetopoorground conduc2vitya. Newbie tip remember if the best swr is at the low end of the band, the antenna is too long. The only problem with such a fan dipole are the frequencies involved. The antennas are come with a center connector piece which has an so. Adding inductors to your dipole makes it possible to reduce the overall length of the antenna.

Many would be familiar with the traditional folded dipole made from tubing or wire, and. Dipole performance of a dipole, feedline and balun followed by a tuner a high dipole, centrefed via a balancedpair transmission line, is an efficient multiband radiating system at all frequencies above that at which the endtoend dipole length is about 0. Richard suggested an airwound balun at the feedpoint to minimize rf along the feedline. The demo version of the software is fully functional and more than adequate for most ham radio antenna design needs. A 2 foot section of pvc painted gray along with various junkbox antenna parts were used in the construction. It is very broadband for a dipole and makes a great field day antenna. This antenna is similar in construction to the 2meter ofc sleeve dipole i built over 8 years ago, but it is a simple centerfed dipole. The main category is antennas for 2 meters band that is about antenna projects for 144 mhz. On hf the size and element diameters are usually a drawback. The most commonly used antenna is the dipole antenna used for rf with the most common applications being old tv transmissions. The classic dipole is also called a balanced antenna because it is fed at its exact center the halfwave ham radio dipole is also the most common antenna used by amateur radio operators throughout the world why is the dipole so popular.

The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. The impedance z at the center insulator is approximately 72 ohms z. Once you get familiar with all the capabilities and features of the demo version, you will have acquired the knowhow to design more complex antennas. Download hf dipole calculator 12 wave wire dipole antenna. Because it is an inexpensive, yet effective, antenna, especially if you build it yourself using wire, insulators and rope that you already have in your. The measurements below are for building a simple dipole antenna. The output shows the 12 wavelength and 14 wavelength design wire length in feet and meters. Jeff is the author of dxing on the edge, a book dedicated to 160 meter history, operation, and equipment available from the arrl.

February 8, 2015 my quest to make a reliable 2 meter dipole antenna for use on 144. If the best swr is at the high end of the band the antenna is too short. The resonant frequency of the antenna is continuously recalculated from its dimensions. Mar 19, 2014 quick description on how to build a 2 meter wire dipole antenna.

Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. Screen shot, non functioning same calculator setup for calculating a dipole for 7. It was incredibly heavy and very quickly became a sagging and corroded eyesore on the corner. Approximately 14 of the 70cm power will flow into the 2m dipole because 440 mhz divided by 3 equals 147 mhz, i. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for jpoles.

When i did get the antenna i tried it on the whole 2 meter band. A cord grip was constructed by drilling two holes in the pipe and inserting a 4mm cleat into each hole purchased from ebay. An eznec antenna model can be used to determine the exact dipole dimensions. The ham radio dipole is called a halfwave antenna because its length corresponds to an electrical half wave at the frequency for which it is intended. 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. Wrapping the coax around the 38 fiberglass pole about ten times was good enough to reduce the match to 1. Make a 40 metre loaded dipole amateur radio tips and how. The coaxial dipole or bazooka is the best keep secret. This program uses different formulae for 2, 3 or multielement designs and includes element tapering. This antenna is similar in construction to the 2 meter ofc sleeve dipole i built over 8 years ago, but it is a simple centerfed dipole. A 2foot section of pvc painted gray along with various junkbox antenna parts were used in the construction.

Being the crafty maker type, i wanted to build my own antenna. Elsewhere in amateur radio circles this antenna is known as a 2m flower pot antenna. This helps in transfer of energy from transmitter module to antenna. The centre of a dipole is a relatively lowimpedance area, so the grade of plastic is not critical. A 12wavelength dipole is made up of two pieces of wire, each 14wavelength long. Performance is equal to a jpole, but its smaller, less obtrusive and more. Although 4 bands is usually stretching it, dont be afraid to try more. Enter the desired frequency and select the desired calculation from the drop box. A standard 1 2 wavelength, center fed dipole will work on odd halfwavelength multiples of the designed frequency. I like the open sleeve design and would like to build a multiband vertical with 1 2 wave element but for hf.

I like the open sleeve design and would like to build a multiband vertical with 12 wave element but for hf. Portable 2m 144 mhz coaxial dipole antenna get out of. Or outside on the roof, or between 2 trees or the side of a wall, or whatever you can imagine. Jpole is a free and portable antenna design software for windows. The best falcon radio antenna 2 meter this is an indoor, outdoor apartment, house, condo, attic or garage, 2 meter 1 2 wave ham radio transmitting antenna.

The loaded dipole v2 is not as good as a full size antenna but it can be used in limited. This antenna project was inspired by richard frazier w7lpn. Use a screwdriver and pliers to release one wire from beneath one of the rivets on the 58inch element. I purchased wire versions of a two meter dipole from falcon antenna on amazon in may of 2014. But site topography and accommodation often require a coaxial cable. The results are conveniently displayed in inches, centimeters, feet and meters. A very basic program for calculating the length of each leg of a 12 wave wire dipole antenna. Each antenna design software is slightly different from each other as each software design some specific types of antenna. Apr 29, 2010 there seems to be 2 versions of a 1080 meter ocf dipole floating around.

If erected as high as possible and in the clear, then it can provide excellent performance for remarkably little cost. Mar 08, 2018 i decided it was time to set up a 2 meter base station. When the distance between wire ends is set equal to overall wire length a low, but adjustable, horizontal 12wave dipole results. This app is probably of no help to experienced antenna designers. This link is listed in our web site directory since friday jun 22 2012, and till today simple 2 meter dipole antenna has been followed for a total of 821 times. Collapsible 3element, 2meter yagi ae5ph radio notebook. If the antenna is small enough to fit on the inside of your window, then it must be a shortened antenna a true 2meterband dipole is about 1 meter 12 wavelength long. Performance of an invertedv 12wave resonant dipole with. I assume that the distance from the driven element is critical. Widely used on its own, it is also incorporated into other rf antenna designs as well, as the driven element. And usually an antenna close to any frequency on 2 meters will have a higher swr on one end of the band and a lower swr at the other end.

I decided it was time to set up a 2 meter base station. This formula to obtain the length of a halfwave dipole antenna will give a good. It is temporarily mounted at 19ft on 2 sections of rohn 15g tower that is bracketed to my garage. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. If we drop the 20 meter antenna to 20 feet above ground, we not only lose over. The former is a broad fish for me question and demonstrates very little research effort and is mostly helpful only to you. I am a brand new ham and your dipole has become my first fixed antenna. One of them is built from a 5 ft dipole with one leg being 45 ft and the other 90 ft. About 2 meter dipole antenna the resource is currently listed in in 2 categories.

Quick description on how to build a 2 meter wire dipole antenna. The best falcon radio antenna 2 meter this is an indoor, outdoor apartment, house, condo, attic or garage, 2 meter 12 wave ham radio transmitting antenna. The antenna needs two points of suspension for ropes from the dipole end insulators. Hf dipole antenna this antenna software will help you design a simple wire dipole antennas for 1 30 mhz. There seems to be some minor variances of this particular design too, a foot or to longershorter etc. A 12 inch 10 foot pvc pipe 3 14 inch x 36 inch aluminum rods 2 14 inch x 48 inch steel rods i know theyll rust, its just temporary to get it to work, ill get aluminum later i dont have any coaxial cable dont know the best type to get and dont know how to match the impedance of the cable to the antenna. The loaded dipole v2 is not as good as a full size antenna but it can be used in limited spaces and even indoors. The halfwave ham radio dipole is also the most common antenna used by amateur radio operators. Many modern transceivers include swr meters, or you can purchase them separately.

Dimensions calculated by the program are the height above ground of the triangles apex and the angle it subtends. Now, a horizontal halfwave dipole in free space would be 1 meter long from insulator to insulator. I built a 2 meter desk top version out of foam disks and 20 awg wire. The garden here at pzt towers is 50ftx20ft so a fulllength flattop dipoledoublet to get me onto 7mhz was out of the question. My design is similar to his design in that i use 4 inch diameter pvc pipe as the coax winding form. However, there is a way to reduce the overall length of an hf dipole through the use of loading coils. About simple 2meter dipole antenna the resource is currently listed in in a single category. There seems to be 2 versions of a 1080 meter ocf dipole floating around. Here is a list of best free antenna design software for windows. The yagi is oriented for horizontal polarization, no ground plane, and a frequency of 146 mhz. Making a coaxial dipole if you start with a common half wave.

I had an inverted t loaded element designed for 160 to 6 meters and it worked. The dipole antenna is an excellent option for many amateur radio applications especially on the hf bands like 80 metres, 40 metres, 20 metres, 15 metres and 10 metres. For many years, hams on hf have known that a 40 meter 7 mhz dipole will work quite well on 15 meters 21 mhz. In the video demo, i use the program to design a 20 meter dipole which is to be installed 30 feet above ground. View antenna display, showing the wires making up the model of the fiveelement beam, with currents and 2d slice superimposed to show orientation. I have built a 2 meter vertical dipole antenna but i am having some issues with the swr, eatch length of wire coming from the shield and the center of the coax i cut to 20 inches i got this number from an article for building a 2 meter dipole but when i check the swr i cant get it to go below 1. See more ideas about dipole antenna, ham radio antenna and ham radio. Antenna, ve3sqb ham radio antenna design software programs. On vhf you can easily design a single feed 2 and 6 meter antenna. This calculator is designed to give the horizontal length of a particular dipole including tees antenna, or one side of it, for the frequency chosen. The calculations for an antenna might be complex, a simple dipole antenna however is pretty easy to design.

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. Post updated 5 may 2019, scroll to the bottom for details. The antenna was constructed on the ground as per the dimensions shown. This link is listed in our web site directory since wednesday aug 29 2007, and till today 2 meter dipole antenna has been followed for a total of 20694 times. A dipole for 7 mhz wont work well at all at 2x the frequency 14 mhz, or 20 meters, but it will work at 3x the. This means it will be relatively inefficient just like the rubber duck antenna that would be supplied with your handheld. Made out of coax, it matches closely to 50 ohms and can be set up horizontally or in an inverted v. It is made to be hung in the rafters or from the ceilings. Dipoles are often rated at about 2 dbi of gain over an isotropic radiator, which. It is used to design jpole antennas for the desired frequency. It will work well on 2m but has a problem on 70cm because of interaction between the two dipole elements. Dipole, inverted v and ground plane antenna calculators. Most commercial versions like the buckmaster seem to follow this design.

Click on calculate and the optimum length for that combination will be displayed in feet and inches. It is the feed point where feedline is usually attached from transmitter. When you run the program, you will see the main view as shown below. I have built a 2meter vertical dipole antenna but i am having some issues with the swr, eatch length of wire coming from the shield and the center of the coax i cut to 20 inches i got this number from an article for building a 2meter dipole but when i check the swr i cant get it to go below 1. I probably went a bit overboard and entered the length and diameter of each section of the whips into the nec file. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. For example, rather than asking simple wire dipole help, try asking why is the length of a dipole 468frequency. The loaded dipole opens up the options for many armature radio users faced with space constraints. Initial setup of antenna and environment parameters. The antenna cable was then threaded through the cleat and secured with a nylon tierap as shown in the image above. The classic dipole is also called a balanced antenna because it is fed at its exact center. To be combined with a yagi uda antenna or used as is.

Fill the hole in the top of the pl259 with hot glue, silicone, or liquid electrical tape. A particular design is given for an antenna named the bc trapper, designed by jeff briggs, k1zm. The goal here is to put up a cheap, easy, and quick 2 meter antenna that is simple and unobtrusive, but works. Whats the difference between these two ocf designs. Long yagis are commonly used from the 144mhz amateur band to the 2. I just wanted to drop you a note and thank you for the plans for the dipole antenna.