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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 is used as an oscillator device in the SHF band?

Both B and C
Klystron tube
Tunnel diode
Thyratron tube

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Microwave Communication
Rainfall is an important factor for fading of radio waves at frequencies above

100 GHz
1 GHz
100 MHz
10 GHz

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Microwave Communication
The frequency of the oscillation generated by a magnetron, is mainly determined by

The flux density of the external magnet
The number of the cavity resonators
The dimension of each cavity resonator
The ratio of the dc cathode voltage to the magnetic flux density

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Microwave Communication
A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

Bunching would occur earlier in time
Oscillation will cease
Output power would increase
The frequency will decrease

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Microwave Communication
The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the

Degree of emission from the cathode
Electron transit time
Inter-electrode capacitance
Distributed lead inductance

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MORE MCQ ON Microwave Communication

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