A parametric amplifier sometimes uses a circular to:

1.	A parametric amplifier sometimes uses a circular to:
A.	Prevent noise feedback
B.	Allow the antenna to be used simultaneously for transmission and reception
C.	Separate the signal and idler frequencies
D.	Permit more efficient pumping
Answer» B. Allow the antenna to be used simultaneously for transmission and reception

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A parametric amplifier sometimes uses a circular to:

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