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

All of these
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

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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 = λR/RL
S = 3λR/L
S = 2λR/L

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Microwave Communication
__________ is the progressive decrease of signal strength with increasing distance.

Radiation
Attenuation
Modulation
Propagation

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Microwave Communication
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

Low-pass filters
The restricted high-frequency response
A long time constant
The shortest possible time

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Microwave Communication
The maximum usable range of the usual radar set (on any particular range setting) is determined by

The duty cycle
The bandwidth of the receiver IF stages
The interval between transmitted pulses
The width of the transmitted pulses

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MORE MCQ ON Microwave Communication

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