Microwave Communication
What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?

Isolator
Magnetron
Simplex
Circulator

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Microwave Communication
The cavity resonator

Has a low Q factor for narrow operation.
Is equivalent to an LC resonant circuit
Produces a frequency which is independent of the cavity size.
In a reflect klystron has its output taken from the reflector plate

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