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Microwave Communication

Microwave Communication
A high-power microwave pulse of the order of megawatts can be generated by a

Traveling-wave tube
Magnetron
Reflex klystron
Gunn diode

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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
Fifth
Third
Fourth

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Microwave Communication
At what position is the input signal inserted into a traveling-wave tube?

At the collector end of the helix
At the control grid of the electron gun
At the cathode end of the helix
At the collector

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

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

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Microwave Communication
Klystron oscillators are most often used in the frequency range of

3000 to 30000 MHz
30 to 30000 MHz
10 to 10000 MHz
300 to 3000 MHz

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

Capacitor
RF emitter
Ferrite emitter
Varactor-triac

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MORE MCQ ON Microwave Communication

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