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Microwave Communication

Microwave Communication
Which of the following is used as a high power microwave oscillator?

Klystron
Thyratron
Reflex-klystron
Magnetron

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

1 GHz
100 MHz
10 GHz
100 GHz

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

Rayleigh fading
Random Doppler shift
Slow fading
Delayed spreading

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

SONAR
LORAN
Echosounder
Fathometer

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

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

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Microwave Communication
A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is

1,000,000 watts
1,000 watts
100 watts
10,000 watts

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