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Microwave Communication

Microwave Communication
Which of the reception problems below that is not due to multipath?

Delayed spreading
Slow fading
Random Doppler shift
Rayleigh fading

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Microwave Communication
A traveling-wave tube (TWT) amplifies by virtue of

The energy liberated form the collector
The effect of an external magnetic field
The absorption of energy by the signal from an electron stream
The energy contained the cavity resonators

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Microwave Communication
The maximum usable range of the usual radar set (on any particular range setting) is determined by

The interval between transmitted pulses
The duty cycle
The bandwidth of the receiver IF stages
The width of the transmitted pulses

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Microwave Communication
Which of the following operating frequencies is used for the modern loran navigational system?

Loran A: 1950 kHz
Loran D: 10.2 kHz
Loran B: 900 kHz
Loran C: 100 kHz

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Microwave Communication
At what position is the input signal inserted into a traveling-wave tube?

At the collector
At the control grid of the electron gun
At the cathode end of the helix
At the collector end of the helix

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Microwave Communication
Oscillators of a klystron tube are maintained

By feedback between the accelerating grid and the repeller
By plate-to-cathode feedback
By bunches of electrons passing the cavity grids
By circulating bunches of electrons within the cavities.

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MORE MCQ ON Microwave Communication

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