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Microwave Communication

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

Slow fading
Delayed spreading
Random Doppler shift
Rayleigh fading

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

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

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

Rician fading
Rayleigh fading
Wavelength fading
Slow fading

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Microwave Communication
A shipboard equipment which measures the distance between the ship’s bottom and the ocean floor.

Fathometer
SONAR
Echosounder
LORAN

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Microwave Communication
The antenna separations (in meters) required for optimum operation of a space diversity system can be calculated from:where R = effective earth radius (m) and L = path length (m)

S = λR/RL
S = 3λR/L
S = λR/L
S = 2λR/L

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Microwave Communication
The coarse frequency adjustment of a reflex klystron is accomplished by

An adjustment in the synchronizer
The AFC system
Adjusting the flexible wall of the resonant cavity
Varying the repeller voltage

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MORE MCQ ON Microwave Communication

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