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Microwave Communication

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

Both B and C
Thyratron tube
Klystron tube
Tunnel diode

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

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

10 GHz
100 MHz
100 GHz
1 GHz

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Microwave Communication
In a pulsed radar set, the function of the duplexer is to

All of these
Prevent frequency drift in the klystron
Aid in calibrating the display unit
Allow the transmitter and the receiver to operate from a common antenna

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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
The aquadag coating on the inside of PPI tube is used

All of these
As a second anode and to prevent the build-up of secondary field
To focus the beam of primary electrons
To shield the electron beam from unidirectional magnetic

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MORE MCQ ON Microwave Communication

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