(in ) about 'Trying
cap?)', on Tue, 26 Apr 2005:
resonant circuit - it is an antenna. That means that there
Govt's electronics set) has appreciable RR.
Wouldn't a small, unloaded loop antenna serve as a pure h-field probe and pick up a low-frequency signal without reference to radiation resistance? After all, if the loop feed a high-Z amplifier, radiation resistance has no effect on the signal amplitude.
John
(in ) about 'Trying
cap?)', on Tue, 26 Apr 2005:
resonant circuit - it is an antenna. That means that
Govt's electronics set) has appreciable RR. ....
Yes, of course. The OP mentioned wanting to see a signal apparently coming from another state, so we could assume this is probably a far field situation, (even at 60 KHz, where lamda is 5 km). But it is certainly possible to consider only the B component and calculate sensitivity based only on enclosed flux. I think that the ratio of RR losses to internal losses is a good figure of merit for a loop antenna used in the far field, but models without RR would be useful.
John,
Do you know of a good reference that discusses RR losses?
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