Explore topic-wise MCQs in Microwave Engineering Questions and Answers.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

For a transmission line, L=1.8mh/m C=0.01pF/m, then the phase constant of the line when operated at a frequency of 1 GHz is:

A. 4.2426
B. 2.2
C. 0.3
D. 1
Answer» B. 2.2
Discussion
2.

In a certain microwave transmission line, the characteristic impedance was found to be 210 10°Ω and propagation constant 0.2 78°.What is the impedance Z of the line, if the frequency of operation is 1 GHz?

A. 0.035+j41.97
B. 0.35+j4.97
C. 35.6+j4.28
D. 9.254+j4.6
Answer» B. 0.35+j4.97
Discussion
3.

A microwave generator at 1.2 GHz supplies power to a microwave transmission line having the parameters R=0.8Ω/m, G=O.8millisiemen/m, L=0.01µH/m and C=0.4PF/m. Propagation constant of the transmission line is:

A. 0.0654 +j0.48
B. 0.064+j4.8
C. 6.4+j4.8
D. none of the mentioned
Answer» B. 0.064+j4.8
Discussion
4.

Expression for phase constant β is:

A. √LC
B. ω √LC
C. c)1/ (ω √LC)
D. None of the mentioned
Answer» C. c)1/ (ω √LC)
Discussion
5.

If the admittance and the impedance of a transmission line are 100 Ω and 50 Ω of a respectively, then value of phase constant β is:

A. 0
B. 20
C. 132
D. 50
Answer» B. 20
Discussion
6.

If a transmission line with inductive reactance of 41.97 Ω and capacitive reactance of 1132.5Ω is operated at 1 GHz , then its phase constant is:

A. 0.0305
B. 0.3
C. 30.3
D. 0.6
Answer» B. 0.3
Discussion
7.

If propagation constant is 12:60°, then the value of phase constant and attenuation constant is:

A. α=6, β=10.39
B. α=61, β=78
C. α=12, β=20.6
D. none of the mentioned
Answer» B. α=61, β=78
Discussion
8.

The value of ‘α’ for a lossless line is:

A. 0
B. 1
C. Infinity
D. Data insufficient
Answer» B. 1
Discussion