Top 80+ Solved Antennas and Microwave Engineering MCQ Questions Answer
Q. To prevent an IMPATT diode from burning, a constant bias source is used to maintain at safe limit.
a. average current
b. average voltage
c. average bias voltage
d. average resistance
Q. The number of semiconductor layers in IMPATT diode is:
a. two
b. three
c. four
d. none of the mentioned
Q. If the length of the intrinsic region in IMPATT diode is 2 µm and the carrier drift velocity are 107 cm/s, then the drift time of the carrier is:
a. 10-11 seconds
b. 2×10-11 seconds
c. 2.5×10-11 seconds
d. none of the mentioned
Q. If the length of the intrinsic region in IMPATT diode is 2 µm and the carrier drift velocity are 107 cm/s, then the nominal frequency of the diode is:
a. 12 ghz
b. 25 ghz
c. 30 ghz
d. 24 ghz
Q. If the RMS peak current in an IMPATT diode is 700 mA and if DC input power is 6 watt, with the load resistance being equal to
a. 10.1 %
b. 10.21 %
c. 12 %
d. 15.2 %
Q. If the critical field in a Gunn diode oscillator is 3.2 KV/cm and effective length is 20 microns, then the critical voltage is:
a. 3.2 v
b. 6.4 v
c. 2.4 v
d. 6.5 v