Dipole & Inverted Vee Calculator

 

                               
There really is no exact formula for computing the length of these antennas. There are several factors that affect the resonant frequency of any antenna (including these two types.) Some of these factors are: the height above ground, the diameter of the wire, nearby structures, the affects of other antennas in the area and even the conductivity of the soil.

The formula for these antennas vary from about 145 / f Mhz to 149 / f MHz depending on the band and the height above ground!

There is a standard formula that can be used as a starting point in your design. For a center fed, wire dipole, this formula is 142.6464 / frequency in megahertz. At my location I've Always have had to shorten the antenna in order to obtain a 1:1 match.

In theory, an Inverted Vee should be about 5% shorter than a dipole at the same frequency.

This page uses the formula, 142.6464 / f MHz to calculate dipole lengths. You may change this number if you feel you know a better number to use as a starting point.
Enter the formula for the antenna calculation
Divided by Freq MHz
Percent smaller for the Inverted Vee
Your dipole's total length is meters or inches
Each leg of the dipole is meters or inches
Your Inverted Vee's total length is meters  or inches;
Each leg of the Inverted Vee is meters or inches
  

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 Dick Cullen, PO Box 15053, Colo. Springs, CO 80935  All material Copyrighted by Blarney Manx and R&R Enterprises

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Last Updated - 07/04/04