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MICROWAVE COMMUNICATION

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

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

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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

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

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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/L
S = λR/RL
S = 2λR/L

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Microwave Communication
The aquadag coating on the inside of PPI tube is used

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

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Microwave Communication
What allow microwave to pass in only one direction?

Ferrite emitter
Capacitor
Varactor-triac
RF emitter

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