For best low-level noise performance in the X-band, an amplifier shoul

1.	For best low-level noise performance in the X-band, an amplifier should use:
A.	A bipolar transistor
B.	A Gunn diode
C.	A step-recovery diode
D.	An IMPATT diode
Answer» D. An IMPATT diode

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For best low-level noise performance in the X-band, an amplifier should use:

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