| 1. | The TWT is sometimes preferred to the magnetron as a radar transmitter output tube because it is ? | |
|
more broadband
|
||
|
less noising
|
||
|
capable of a longer duty cycle
|
||
|
a more efficient amplifier
|
||
View Answer
Discuss in Forum
Report Question| 2. | In a TWT the helix is used as which one of the following ? | |
|
Fast wave structure
|
||
|
Attenuating element
|
||
|
Slow wave structure
|
||
|
Amplifying element
|
||
| 3. | By using a travelling wave structure in a maser, we may ? | |
|
increase the power output
|
||
|
increase the bandwidth of operation
|
||
|
minimize the noise level and distortion
|
||
|
stabilize the frequency of operation
|
||
| 4. | Which of the following is a microwave source with a cross-field theory ? | |
|
Travelling wave tube
|
||
|
Double cavity klystron
|
||
|
Reflex klystron
|
||
|
Magnetron
|
||
| 5. | One of the following microwave diodes is suitable for very low power oscillators only ? | |
|
Gunn diode
|
||
|
IMPATT diode
|
||
|
Tunnel diode
|
||
|
Avalanche diode
|
||
| 6. | The two-valley model of the Ridley-Watkins Hilsum theory is best suited to explain the working of which one of the following ? | |
|
Gunn diode oscillator
|
||
|
Klystron oscillator
|
||
|
Quartz crystal oscillator
|
||
|
R-C oscillator
|
||
| 7. | Which one of the following microwave devices is used for switching applications ? | |
|
PIN diode
|
||
|
Step recovery diode
|
||
|
Gunn diode
|
||
|
IMPATT diode
|
||
| 8. | Which one of the following microwave diodes is suitable for very low power oscillations applications only ? | |
|
VARACTOR
|
||
|
Tunnel
|
||
|
GUNN
|
||
|
IMPATT
|
||
| 9. | A parametric amplifier has to be cooled ? | |
|
to make it suitable to pulses
|
||
|
because it cannot operate at room temperature
|
||
|
to improve noise performance
|
||
|
to increase bandwidth
|
||
| 10. | MASER is a/an ? | |
|
detector
|
||
|
receiver
|
||
|
amplifier
|
||
|
None of the above
|
||