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Microwave Communication

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

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

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

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Microwave Communication
A high-power microwave pulse of the order of megawatts can be generated by a

Gunn diode
Traveling-wave tube
Magnetron
Reflex klystron

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Microwave Communication
What is the purpose of the electromagnetic field which surrounds a traveling-wave tube?

To keep the electrons from spreading out
To velocity modulate the electron beam
To accelerate the electron
To slow down the signal on the helix

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

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Microwave Communication
To achieve good bearing resolution when using a pulsed-radar set, an important requirement is

A narrow, antenna-beam width in the horizontal plane
A narrow, antenna-beam width in the vertical plane
A low repetition rate
A high duty cycle

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MORE MCQ ON Microwave Communication

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