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Microwave Communication

Microwave Communication
__________ is the progressive decrease of signal strength with increasing distance.

Propagation
Modulation
Radiation
Attenuation

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Microwave Communication
The main frequency determining element of a klystron is

The repeller voltage
Its mode of operation
Its resonant cavity
The accelerating voltage

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

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

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Microwave Communication
A traveling-wave tube (TWT) amplifies by virtue of

The effect of an external magnetic field
The absorption of energy by the signal from an electron stream
The energy contained the cavity resonators
The energy liberated form the collector

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

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

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Microwave Communication
What is the purpose of the electromagnetic field which surrounds a traveling-wave tube?

To accelerate the electron
To keep the electrons from spreading out
To velocity modulate the electron beam
To slow down the signal on the helix

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MORE MCQ ON Microwave Communication

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