Get the right size for an antenna

This post is mostly a remember for myself … The formula to get the right antenna size is the following one.

Wavelengh = 300 / FmHz

As an example 300 / 868Mhz = 0,345 m

Then the antenna will be 1/2 wave = 17,28cm or 1/4 wave = 8,64cm

 

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