Reg Edwards wrote:
It may be of interest -
Doubling the length and diameter of a solenoid and reducing the number of
turns of thicker wire to maintain the same inductance, doubles the Q until
radiation loss resistance begins to predominate.
And it's a big coil for radiation resistance to predominate.
----
Reg, G4FGQ
....and like i mentioned, put a (cylindrical) shield around it and you
still have a high Q and a lower frequency *due to the higher distributed
capacitance.
Alternately, use it as a slow wave structure in a (resonant)
cavity)...
(same difference)
|