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how to match loop antenna to a standard 50 ohm?

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mauloftin

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Loop antenna

Hi,

is it possible match loop antenna to a standard 50 ohm. And how ?

Thank
 

Re: Loop antenna

it depends on loop dimensions.

If the loop diameter « λ , the answer is NO, because there is no EM coupling between space and the antenna, in other words, no power is coupled , only H field is coupled. In this case, respecting the Ohm law, the radiactive resistance=0Ω.

If the loop diameter is close to ½λ , both E and H are coupled, in other words , the
0 « Radiative Resistance « ∞.

In my personal experience, years ago, I used a ferrite transformer to match impedance to 50Ω. Note that the transofrmer also acts as a Balun.
 

    mauloftin

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Re: Loop antenna

OK, thank you very much, I thought something similar.... but i was not sure
 

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