Electronics and Communication Engineering - Microwave Communication

1. 

In 8 cavity magnetron the p mode corresponds to a total phase shift equal to

A. ± 8 p radians around the periphery
B. ± 4 p radians around the periphery
C. ± 2 p radians around the periphery
D. ± 16 p radians around the periphery

Answer: Option A

Explanation:

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2. 

Satellite communication systems use the frequency band

A. 10 to 20 MHz
B. 50 to 70 MHz
C. 3 to 6 GHz
D. 100 to 120 GHz

Answer: Option C

Explanation:

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3. 

The characteristic impedance of a cable is about

A. 300 Ω
B. 50 Ω
C. 5 Ω
D. 2 Ω

Answer: Option B

Explanation:

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4. 

The Q factor of a waveguide resonator is given by (ω0 is resonant frequency, U is energy storage and WL is the power loss)

A.
B.
C. Q = ω0UWL
D.

Answer: Option A

Explanation:

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5. 

A TR (transmitter receiver) tube has

A. low loss for low power signals and high
B. high loss for low power signals and low loss for high level signal
C. low loss for both low level and high level signals
D. high loss for both low level and high level signals

Answer: Option A

Explanation:

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