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Microwave Communication
Klystron oscillators are most often used in the frequency range of
300 to 3000 MHz
10 to 10000 MHz
30 to 30000 MHz
3000 to 30000 MHz
300 to 3000 MHz
10 to 10000 MHz
30 to 30000 MHz
3000 to 30000 MHz
Answer
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Related Question
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.
Fifth
Sixth
Fourth
Third
Fifth
Sixth
Fourth
Third
Answer
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Microwave Communication
Oscillators of a klystron tube are maintained
By feedback between the accelerating grid and the repeller
By plate-to-cathode feedback
By circulating bunches of electrons within the cavities.
By bunches of electrons passing the cavity grids
By feedback between the accelerating grid and the repeller
By plate-to-cathode feedback
By circulating bunches of electrons within the cavities.
By bunches of electrons passing the cavity grids
Answer
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Microwave Communication
Which of the following operating frequencies is used for the modern loran navigational system?
Loran D: 10.2 kHz
Loran A: 1950 kHz
Loran B: 900 kHz
Loran C: 100 kHz
Loran D: 10.2 kHz
Loran A: 1950 kHz
Loran B: 900 kHz
Loran C: 100 kHz
Answer
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Microwave Communication
What is the purpose of the electromagnetic field which surrounds a traveling-wave tube?
To slow down the signal on the helix
To keep the electrons from spreading out
To velocity modulate the electron beam
To accelerate the electron
To slow down the signal on the helix
To keep the electrons from spreading out
To velocity modulate the electron beam
To accelerate the electron
Answer
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Microwave Communication
The Gunn diode oscillator
Generates frequencies which are below 100 MHz
Is capable of generating continuous microwave power of the order of kilowatt
Operates over a positive resistance characteristic
Depends on the formation of charge domain
Generates frequencies which are below 100 MHz
Is capable of generating continuous microwave power of the order of kilowatt
Operates over a positive resistance characteristic
Depends on the formation of charge domain
Answer
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