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Microwave Communication

Microwave Communication
In an SHF pulsed radar set, a reflex klystron can be used as a

Local oscillator
Duplexer stage
Single mixer stage
Transmitter oscillator

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Microwave Communication
In microwave transmission using digital radio, what causes most intersymbol interference?

Random Doppler shift
Rayleigh fading
Slow fading
Delayed spreading

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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/L
S = 3λR/L
S = 2λR/L
S = λR/RL

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Microwave Communication
Oscillators of a klystron tube are maintained

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

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Microwave Communication
Which of the following operating frequencies is used for the modern loran navigational system?

Loran B: 900 kHz
Loran D: 10.2 kHz
Loran C: 100 kHz
Loran A: 1950 kHz

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Microwave Communication
The resonant frequency of a cavity resonator depends upon

The capacitor which tunes it
Its electrical dimensions
Its physical dimensions
The mode of operation

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MORE MCQ ON Microwave Communication

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