Electronics and Communication Engineering - Microwave Communication

11. 

Slotted line can be used for measurement of high frequencies

A. True
B. False

Answer: Option A

Explanation:

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12. 

In a waveguide the dielectric region is generally

A. air
B. magnetic material
C. brass
D. mica

Answer: Option A

Explanation:

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13. 

In directional coupler of the given figure, the terms |S14| and |S23| of scattering matrix are nearly

A. 1 each
B. 0.5 each
C. 0.1 each
D. 1 and 0.5 respectively

Answer: Option A

Explanation:

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14. 

A line is excited by a 100 V, 200 ohm source and is terminated by 100 Ω resistance. If the voltage on line reaches steady value in 80 ns, the natural resonant frequency is

A. 100 MHz
B. 50 MHz
C. 12.5 MHz
D. 6.25 MHz

Answer: Option C

Explanation:

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15. 

A line of length slightly longer than and open circuited at far end behaves as

A. inductance L
B. capacitance C
C. L and C in series
D. L and C in parallel

Answer: Option A

Explanation:

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