Can a Loop Antenna Serve as Both Voltage Source and Inductor in an RLC Network?

[dmorris619]

I am building a resonant RLC network in which the inductor is actually a loop antenna that will pick up changes in magentic fields and represent them as a voltage. Is this configuration actually feasible where the loop antenna is both the voltage source and the inductor?

Also slightly related is the best method in which to connect the loop antenna to the network. I have read on the web that it is often better to connect the loop antenna to the resistor and the capacitor through a 1 to 1 transformer, instead of connecting it directly into the circuit. If someone could provide guidance on this as well that would be great.

 

[vk6kro]

A loop antenna does behave like an inductor provided it has less than a half wavelength of wire in it. Longer than that, and it behaves like a capacitor.

However, normally, you would have one that behaved like an inductor.

If you have a receiver that has a low input impedance, you could put a capacitor in series with one leg of the antenna and this will resonate the antenna and stop it being damped by the low impedance.

I can't think of any reason to have a 1:1 transformer at the receive input.

Small loops are very inefficient but may work Ok for strong signals.