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Microwave Communication

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

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

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Microwave Communication
Calculate the effective earth’s radius if the surface refractivity is 301.

8493 mmi
6370 mi
6370 km
8493 km

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Microwave Communication
The resonant frequency of a cavity resonator depends upon

The mode of operation
Its electrical dimensions
The capacitor which tunes it
Its physical dimensions

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

SONAR
LORAN
Fathometer
Echosounder

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

Radiation
Attenuation
Propagation
Modulation

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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 = 2λR/L
S = 3λR/L
S = λR/RL
S = λR/L

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