3-91O2 B
What is the purpose or function of the RADAR duplexer/circulator? It is a/an:
A. Coupling device that is used in the transition from a rectangular waveguide to a circular waveguide.
B. Electronic switch that allows the use of one antenna for both transmission and reception.
C. Modified length of waveguide that is used to sample a portion of the transmitted energy for testing purposes.
D. Dual section coupling device that allows the use of a magnetron as a transmitter.
