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Microwave Communication
If k-factor is greater than 1, the array beam is bent
Towards the ionosphere,
Away from the earth
Towards the outer space
Towards the earth
Towards the ionosphere,
Away from the earth
Towards the outer space
Towards the earth
Answer
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Related Question
Microwave Communication
In a radar-set receiver, the usual mixer stage is
A silicon crystal
A Rochelle salts crystal
A tunnel diode
And FET
A silicon crystal
A Rochelle salts crystal
A tunnel diode
And FET
Answer
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Microwave Communication
In a pulsed radar set, the STC circuit is used to
Reduce interference from the effects of sea return
Vary the pulse frequency in order to control the maximum target
Increases receiver sensitivity for echoes from targets
Improve the target bearing resolution
Reduce interference from the effects of sea return
Vary the pulse frequency in order to control the maximum target
Increases receiver sensitivity for echoes from targets
Improve the target bearing resolution
Answer
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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
Output power would increase
Oscillation will cease
The frequency will decrease
Bunching would occur earlier in time
Output power would increase
Oscillation will cease
The frequency will decrease
Answer
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Microwave Communication
If the instantaneous RF potentials on the two sides of a magnetron cavity are of opposite polarity, the operation is in the
π/4 mode
π/2 mode
π mode
2π mode
π/4 mode
π/2 mode
π mode
2π mode
Answer
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Microwave Communication
Oscillators of a klystron tube are maintained
By bunches of electrons passing the cavity grids
By circulating bunches of electrons within the cavities.
By plate-to-cathode feedback
By feedback between the accelerating grid and the repeller
By bunches of electrons passing the cavity grids
By circulating bunches of electrons within the cavities.
By plate-to-cathode feedback
By feedback between the accelerating grid and the repeller
Answer
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