Do the radials of a quarter or 58 wavelength antennas connect to. A half wave antennas radiation peak angle is 20 degrees. The second reason you may want to use the 5 8 wave vertical is to obtain a lower angle of radiation. To use the calculator, enter the desired operating frequency in megahertz to get a starting length in both feet and meters for building a quarterwave vertical antenna.
The calculators for other antenna types such as parabolic,horn,dipole and patch are also mentioned. Program good for 1 500 mhz, although intended for mf hf useage. Wave velocity ms wavelength m frequency hz example calculation. He goes on to debunk the 58 advantage claims in his four page article.
Here are the steps that i would follow in planning a 5 8 wave antenna. Find a tube with a circumference equal to one wavelength, and wrap wire in a helix spaced a quarter wavelength. Coax collinear antenna dimension calculator back to antenna calculator overview. Anyway back when chasing dx on 160 was tough in the 60s and 70s loran and power limits of about 100 watts out. This link is listed in our web site directory since wednesday mar 25 2009, and till today 58 wave vertical antenna calculator has been followed for a total of 25921 times. Discussion in cb antennas started by homerbb, mar 18, 2011. The vhf 58wavelength 144 mhz vertical monopole has long held the reputation of providing about a 3db gain advantage over the 14wavelength. It is found that a 34 wavelength vertical element provides a good match, and therefore one solution for providing a good impedance match for the 5 8 wavelength vertical antenna is to make it appear as a 5 8 radiator but have the electrical length of a 34 element. The measurements below are for building a simple dipole antenna.
Linear polarized antenna is a type of fpv antenna, and. Download hf dipole calculator 12 wave wire dipole antenna. Dipole antenna length calculator dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. To reduce the ground effect, 58 wavelength antenna should be installed at least 12 wavelength above ground to 1. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. Order nmo mount for your larsen vhf mobile antenna separately.
You can shorten your vertical antenna by using a loading coil. Yagi calculator is a free antenna design and analysis software for windows. The following program will calculate the lengths needed to construct several popular wire antennas. I would think that still would work on bent vertical antennas from 14 up to 5 8 wave. If you have no particular preference within a given ham radio band, then simply enter its center frequency i.
In order for this antenna to tune properly at the 2 meter ham bands, 144148mhz at onequarter wavelength, it would need to be a hair over 20 inches long. Calculate the required dimensions for a coaxial collinear antenna construction for any given frequency. This app is probably of no help to experienced antenna designers. Before answering a question like this, i must first ask the ham whatread more. It is found that a 34 wavelength vertical element provides a good match, and therefore one solution for providing a good impedance match for the 58 wavelength vertical antenna is to make it appear as a 58 radiator but have the electrical length of a 34 element. I have tried out different wire sizes,number of turns and diameters and i have got good results on the swr meter but when the antenna is up and compared to a folded dipole at the same height the 5 8 is down at least 5 or more spoints. A very basic program for calculating the length of each leg of a 12 wave wire dipole antenna. Enter the desired frequency and select the wavelength. Antenna calculator antenna calculator is a useful tool when developing antennas for. When the antenna is erected and the ground plane is in place, grab your antenna analyzer or vna. Youll find that the 5 8 wave antennas angle of radiation is just 16 degrees making it an even better dx antenna. Wire antenna calculator amateur radio station ws6x.
Antenna calculator is a free software application from the reference tools. The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. Antenna design calculators category is a curation of 83 web resources on, parallel square conductor transmission line calculator, analysis of antenna mast strength and bending stress, full wave loop antenna calculator. Making your own 2 metre 146 mhz 58th wave whip antenna. Choose from quarterwave, halfwave, the powerful 58wave, 34wave, or fullwave, and calculate minimum lengths of required radials, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, wire, coax, connectors, and other parts and. The advent of new, affordable mfhfvhf radios in the last few months from virtually all the major manufacturers, has spurred a migration by more and more hams to the six meter band. Analysis and design of circular microstrip patch antenna at 5.
Using a 5 watt portable transceiver and having the antenna mounted on an nmo mag mount and sitting on the roof of the car, swr tests with both a bird 43 and diamond sx1100 swr meter. It is quite possible, that other calculators deliver slightly different results. This calculator will help you to calculate the different wavelength of. My latest homebrew 58 base antenna worldwidedx radio forum. Im trying to build a 5 8 wave antenna out of an old cb antenna for the vhf band the problem is i cannot find out how to calculate the coil dimentions. Have a maxrad 58 wave whip antenna that i think is supposed to be tuned to the rr frequencies, but a quick search hasnt revealed what length is best for a 58. Maple leaf communications antenna calculator vertical. This calculator will help you to calculate the different wavelength of antennas based on the frequency. This calculator uses a k multiplying factor value of. Generally the imaginary part will be capacitive and the real part will not match 50 ohms. All you need to do is enter the desired resonant center frequency in the form below, then click calculate. The inverted vee antenna will be shorter by 2 5% depending on the angle from horizontal.
Calculate safety distance from your antenna icnirp is a calculator software that. The main category is vertical antennas plans that is about vertical antennas projects. The 58 wave antenna consists of a vertical radiator which is fed at the base of the antenna. Made from heavyduty aluminum, the cp22e is easily assembled, yielding excellent performance with 6. This does not take into consideration the type or size of horizontal reflectors, of even if there is a need for them. Online antenna analysis and design software free online software to. This page can be used to calculate the element and radial lengths for a 14 wave ground plane antenna.
Listed under the antennasvertical category that is about vertical. Have a maxrad 5 8 wave whip antenna that i think is supposed to be tuned to the rr frequencies, but a quick search hasnt revealed what length is best for a 5 8. The distance between one point to another adjacent point in a wave is known as the wavelength. Enter the desired frequency and select the desired calculation from the drop box. Use our simple calculator to determine approximate dimensions of materials needed to build a vertical antenna. Larsen 144174 mhz nmo baseloaded 58 wave antenna black. At vhf, both the 14wavelength monopole and the 58wavelength monopole antennas are widely used. Six meter wavelength band antennas iw5edi simone hamradio. Using this software, you can design and build your own yagi antenna. Circular polarized antenna is the most popular antenna for fpv flying with 5. Emphasis added on specifications that dont stand up to analysis or diamonds own measurements.
This page covers 3 element yagi antenna calculator. To determine the frequency for which this length is 5 8 wavelength, multiply the frequency by 2. This calculator is designed to give the vertical length height of a particular antenna, for the frequency and wavelength chosen. Do the radials of a quarter or 5 8 wavelength antennas connect to. The 58 wave antenna consists of a vertical radiator, a loading coil and colinear plane at the base of the antenna. 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%. It seems you are ignoring the repeater user in this article, who often benefit from a higher angle of radiation due to repeaters being several thousand feet higher on mountain tops. This calculator can be used to design a quarter wave ground plane antenna, with radials.
Some are based on lookup tables, some completely hide their algorithms. On6mu home made vhf 58 vertical antenna for radioamateurs. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. Im often asked, what antennas are best for six meters. Currently supports halfwave dipoles 58 wave verticals 1 wav.
This means that when perfectly constructed, it will have an impedance that is made up of a real part and an imaginary part. The cp22e is a 2meter monoband, 258 wavelength groundplane antenna, optimized for the u. Here is a handy chart for determing 14 wave verticals, 12 wave dipoles, and full wave loop lengths. That means that the amount of power your radio puts into the antenna, will actually be increased a little, and the antenna will radiate an effective radiated power slightly higher than the input power. The larsen nmo150b baseloaded 58 wave antenna only black operates within the vhf frequency range, 144174 mhz.
Dipole antenna calculator software free download dipole. Have a yaesu ft2500m ham radio set up to shift between my car and indoors. For best result, adjust the length of the antenna to get the smallest swr, or adjust loading coil for the best matching impedence. The correct lengths for the various models will be displayed in the chart.
Choose from quarterwave, halfwave, the powerful 5 8 wave, 34wave, or fullwave, and calculate minimum lengths of required radials, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, wire, coax, connectors, and other parts and. Calculate the frequency length of antennas please enter one value only and calculate the result. This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave ratio swr to design the antenna, you need to go to task design yagi menu. Here is a simple antenna calculator for two popular forms of ham radio hf wire antennas. Find the lowest frequency for which you have minimum return loss. Lots of calculators online and software are available to determine the required values. I used this calculator to build a dipole antenna for the cdma 450 network operated by net1 in scandinavia. This software can not only be used to design but also to find out antenna gain, stacking distance, and standing wave ratio swr. These items, a spacer, which will be used to mount the coil, and the coupler will be used to mount the radials disc to the antenna shaft. Nov 03, 2018 the vertical endfed 5 4 wavelength antenna may actually work somewhat for vhf use, but is hardly an efficient use of antenna resources. The formula and basics of yagi antenna calculator are also explained with example. To reduce the ground effect, 5 8 wavelength antenna should be installed at least 12 wavelength above ground to 1. This link is listed in our web site directory since wednesday mar 25 2009, and till today 5 8 wave vertical antenna calculator has been followed for a total of 25921 times.
This vehicle antenna delivers high performance, with a gain of 3 db with ground plane. 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. All antenna lengths in the information below are in feet and are the results based on the standard formula of 468 fmhz total length in feet. Helical antennas invented by john kraus give a circular polarized wave. About 58 wave vertical antenna calculator the resource is currently listed in in 2 categories. Lightradio in vacuumair light in water sound in air sound in water custom ms kms miless. The vertical endfed 54 wavelength antenna may actually work somewhat for vhf use, but is hardly an efficient use of antenna resources. In this post, an experimental 5 8 wavelength wire antenna was built using a chosen frequency of 28. P, india abstract here we made an attempt to maximize the gain of microstrip patch antenna. This calculator provides quick estimation of antenna size required for a given gain and frequency. This app does nothing more than the standard 468freq mhz type calculations. The output shows the 12 wavelength and 14 wavelength design wire length in feet and meters. 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%.
Radio signal reception is poor in general in the area. Lets take for instance the case of a wave with a frequency of 56 hz going through a material at a speed of 168 ms. There is a free antenna modeling program called eznec that can be. The conductor width isnt of great importance in the design. Although they do allow better range and reception, there are situations where you are better off using simple linear polarized antenna, such a dipole antenna. I would think that still would work on bent vertical antennas from 14 up to 58 wave. The dipole consisted of two aluminum tubes 34 x 6, and two aluminum tubes 12 x 2. Enter the required frequency in mhz, the velocity factor of the coax if known and antenna designer will calculate the dimensions of. There are usually four radials, three being a minimum, but you could use up to six. 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. The basic formula for determining the length of a fullwave wire loop antenna is.
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