Antenna Length Calculator

We all know how much Bob likes a spreadsheet, so here’s one that may be of interest to the club.

I have encountered the problems of trying to adjust antennas to the resonant frequency,

I decided to apply my maths skills and have come up with the attached.

Basically, you enter a number of values for;

Target Frequency

Frequency you want to be resonant at and if your antenna is ¼, ½ or whatever

You then take some vswr readings, and from there, it calculates the amount you need to increase, or decrease the antenna length.

Keith MM0KTC

Antenna Length Calc (10.4 KB) 119 Downloads

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