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Microwave Communication

Microwave Communication
What do you call an attenuation that occurs over many different wavelengths of the carrier?

Slow fading
Rician fading
Wavelength fading
Rayleigh fading

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Microwave Communication
The main frequency determining element of a klystron is

Its mode of operation
The repeller voltage
Its resonant cavity
The accelerating voltage

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

Thyratron tube
Tunnel diode
Klystron tube
Both B and C

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

Rayleigh fading
Random Doppler shift
Delayed spreading
Slow fading

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Microwave Communication
A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be

A reduction in horizontal resolution
No noticeable effect
A decrease in gain
A decrease in range

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

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

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