Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Microwave Communication
Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Sixth

Fourth

Third

Fifth

Sixth

Fourth

Third

Fifth

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Microwave Communication
In a pulsed radar set, the STC circuit is used to

Vary the pulse frequency in order to control the maximum target

Improve the target bearing resolution

Increases receiver sensitivity for echoes from targets

Reduce interference from the effects of sea return

Vary the pulse frequency in order to control the maximum target

Improve the target bearing resolution

Increases receiver sensitivity for echoes from targets

Reduce interference from the effects of sea return

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Microwave Communication
A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

Bunching would occur earlier in time

The frequency will decrease

Oscillation will cease

Output power would increase

Bunching would occur earlier in time

The frequency will decrease

Oscillation will cease

Output power would increase

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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

The shortest possible time

A long time constant

Low-pass filters

The restricted high-frequency response

The shortest possible time

A long time constant

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

Varactor-triac

Ferrite emitter

RF emitter

Capacitor

Varactor-triac

Ferrite emitter

RF emitter

Capacitor

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Microwave Communication
It is possible to increase the maximum range of a radar equipment by

All of these

Narrowing the beam width and increasing the pulse duration

Raising the peak power of the transmitter

Lowering the pulse frequency

All of these

Narrowing the beam width and increasing the pulse duration

Raising the peak power of the transmitter

Lowering the pulse frequency

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication

Microwave Communication In a pulsed radar set, the STC circuit is used to

Microwave Communication A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

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

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

Microwave Communication It is possible to increase the maximum range of a radar equipment by

Microwave Communication
In a pulsed radar set, the STC circuit is used to

Microwave Communication
A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

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

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

Microwave Communication
It is possible to increase the maximum range of a radar equipment by