MICROWAVE COMMUNICATION QUIZ

The resonant frequency of a cavity resonator depends upon

The mode of operation

Its physical dimensions

Its electrical dimensions

The capacitor which tunes it

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YOUR ANSWER : ?

If k-factor is greater than 1, the array beam is bent

Towards the earth

Away from the earth

Towards the ionosphere,

Towards the outer space

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YOUR ANSWER : ?

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 reduction in horizontal resolution

A decrease in gain

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YOUR ANSWER : ?

Which causes multipath or frequency selective fading?

Nearer reflector

Large reflector

Small reflector

Further reflector

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A high-power microwave pulse of the order of megawatts can be generated by a

Reflex klystron

Traveling-wave tube

Gunn diode

Magnetron

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When it is desired that short-range targets be clearly seen on a pulsed-radar set, it is important that the receiver and display system have

A long time constant

The restricted high-frequency response

Low-pass filters

The shortest possible time

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YOUR ANSWER : ?

The Gunn diode oscillator

Generates frequencies which are below 100 MHz

Is capable of generating continuous microwave power of the order of kilowatt

Depends on the formation of charge domain

Operates over a positive resistance characteristic

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YOUR ANSWER : ?

If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers

Must be increased

Must be doubled

Must remain as before

May be decreased

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YOUR ANSWER : ?

The main frequency determining element of a klystron is

Its resonant cavity

Its mode of operation

The repeller voltage

The accelerating voltage

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

Thyratron tube

Both B and C

Klystron tube

Tunnel diode

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YOUR ANSWER : ?

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