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Microwave Communication
Rainfall is an important factor for fading of radio waves at frequencies above
100 GHz
1 GHz
10 GHz
100 MHz
100 GHz
1 GHz
10 GHz
100 MHz
Answer
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Related Question
Microwave Communication
Oscillators of a klystron tube are maintained
By plate-to-cathode feedback
By bunches of electrons passing the cavity grids
By circulating bunches of electrons within the cavities.
By feedback between the accelerating grid and the repeller
By plate-to-cathode feedback
By bunches of electrons passing the cavity grids
By circulating bunches of electrons within the cavities.
By feedback between the accelerating grid and the repeller
Answer
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Microwave Communication
The frequency of the oscillation generated by a magnetron, is mainly determined by
The flux density of the external magnet
The ratio of the dc cathode voltage to the magnetic flux density
The dimension of each cavity resonator
The number of the cavity resonators
The flux density of the external magnet
The ratio of the dc cathode voltage to the magnetic flux density
The dimension of each cavity resonator
The number of the cavity resonators
Answer
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Microwave Communication
A PPI cathode-ray tube as used on a radar set
Is used for receiver alignment
Is used to check the percentage of modulation
Indicates both the range and azimuth of a target
Indicates only the range of a target
Is used for receiver alignment
Is used to check the percentage of modulation
Indicates both the range and azimuth of a target
Indicates only the range of a target
Answer
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Microwave Communication
Which of the reception problems below that is not due to multipath?
Slow fading
Delayed spreading
Random Doppler shift
Rayleigh fading
Slow fading
Delayed spreading
Random Doppler shift
Rayleigh fading
Answer
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Microwave Communication
In a pulsed radar set, the function of the duplexer is to
Aid in calibrating the display unit
Allow the transmitter and the receiver to operate from a common antenna
All of these
Prevent frequency drift in the klystron
Aid in calibrating the display unit
Allow the transmitter and the receiver to operate from a common antenna
All of these
Prevent frequency drift in the klystron
Answer
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