In article , Cecil Moore wrote:

Something I have wondered about: If we simply amplify
the receiver voltage through a near infinite impedance
FET with virtually no load on the signal, do we get the
signal information but lose virtually all the power to
re-radiation? (assume high S/S+N)

I think so, yes. Electrically, a "driven element" which feeds a
very-high-impedance FET would look like a simple passive element (e.g.
like a parasitic director or reflector in a Yagi). There would be
some small amount of power delivered into the load (the FET's gate
capacitance and its associated losses), and some small amount
dissipated as losses in the element itself, but the rest would be
re-radiated... just as is the case with an unloaded parasitic element.

--
Dave Platt AE6EO
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