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Microwave Communication

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

Transmitter oscillator
Duplexer stage
Single mixer stage
Local oscillator

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

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

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Microwave Communication
A Class-S Emergency Position-Indicating Radio Beacon (E.P.I.R.B)

May be tested during the first five minutes of any hour
Must have its battery replaced after emergency use
Must be capable of floating or being secured to a survival
All of these

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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 = 3λR/L
S = λR/RL
S = 2λR/L
S = λR/L

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Microwave Communication
Coupling into and out of a traveling-wave tube can be accompanied by a

All of these
Waveguide match
Cavity match
Direct coax-helix match

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

Away from the earth
Towards the ionosphere,
Towards the outer space
Towards the earth

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MORE MCQ ON Microwave Communication

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