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Microwave Communication

Microwave Communication
In a radar-set receiver, the usual mixer stage is

A silicon crystal
A tunnel diode
A Rochelle salts crystal
And FET

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Microwave Communication
When it is desired that short-range targets be clearly seen on a pulsed-radar set, it is important that the receiver and display system have

Low-pass filters
The shortest possible time
A long time constant
The restricted high-frequency response

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Microwave Communication
Calculate the effective earth’s radius if the surface refractivity is 301.

8493 mmi
6370 km
6370 mi
8493 km

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Microwave Communication
Which of the following is used as an oscillator device in the SHF band?

Klystron tube
Thyratron tube
Tunnel diode
Both B and C

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Microwave Communication
Oscillators of a klystron tube are maintained

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

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

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

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MORE MCQ ON Microwave Communication

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