Explore topic-wise MCQs in Microwave Engineering.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

A three section binomial transformer is used to match a 100Ω transmission line to a 50Ω transmission line. Then the value of the constant ‘A’ for this design is:

A. -0.0433
B. 0.0433
C. 0.01
D. -0.01
Answer» B. 0.0433
Discussion
2.

As the number of sections in the binomial multisection transformer increases the plot of normalized frequency v/s reflection co-efficient has a wider open curve.

A. true
B. false
Answer» B. false
Discussion
3.

In the plot of normalized frequency v/s reflection co-efficient for a binomial multisection filter, the curve has a dip at:

A. center frequency
B. upper cutoff frequency
C. lower cutoff frequency
D. none of the mentioned
Answer» B. upper cutoff frequency
Discussion
4.

The reflection coefficient ГN in terms of successive impedances Zn and Zn+1 when multisection transformers are used in a binomial matching transformer is given by:

A. 0.5ln (Zn+1/Zn)
B. ln (Zn+1/Zn)
C. 0.5ln (Zn/Zn+1)
D. (Zn/Zn+1)
Answer» B. ln (Zn+1/Zn)
Discussion
5.

The condition │Г (θ) │=0 for θ=π/2 of a binomial multi section transformer corresponds to the:

A. upper cutoff frequency
B. lower cutoff frequency
C. center frequency
D. none of the mentioned
Answer» D. none of the mentioned
Discussion
6.

To obtain a flat curve in the response of a binomial multisection transformer, N-1 derivatives of │Г (θ) │are set to zero. This implies:

A. the frequency sensitivity of the matching section is increased linearly
B. the frequency sensitivity of the matching section is increased exponentially
C. roll off in the curve is increased
D. none of the mentioned
Answer» E.
Discussion
7.

If a quality binomial matching transformer gives a good flat response curve, it is called “maximally flat”.

A. true
B. false
Answer» B. false
Discussion
8.

AS_THE_NUMBER_OF_SECTIONS_IN_THE_BINOMIAL_MULTISECTION_TRANSFORMER_INCREASES_THE_PLOT_OF_NORMALIZED_FREQUENCY_V/S_REFLECTION_CO-EFFICIENT_HAS_A_WIDER_OPEN_CURVE.?$

A. true
B. false
Answer» B. false
Discussion
9.

A three section binomial transformer is used to match a 100Ω transmission line to a 50Ω transmission line. Then the value of the constant ‘A’ for this design is:$#

A. -0.0433
B. 0.0433
C. 0.01
D. -0.01
Answer» B. 0.0433
Discussion
10.

In the plot of normalized frequency v/s reflection co-efficient for a binomial multisection filter, the curve has a dip at?

A. center frequency
B. upper cutoff frequency
C. lower cutoff frequency
D. none of the mentioned
Answer» B. upper cutoff frequency
Discussion
11.

The reflection coefficient –ìN in terms of successive impedances Zn and Zn+1 when multisection transformers are used in a binomial matching transformer is given by:$

A. 0.5ln (Z<sub>n+1</sub>/Z<sub>n</sub>)
B. ln (Z<sub>n+1</sub>/Z<sub>n</sub>)
C. 0.5ln (Z<sub>n</sub>/Z<sub>n+1</sub>)
D. (Z<sub>n</sub>/Z<sub>n+1</sub>)
Answer» B. ln (Z<sub>n+1</sub>/Z<sub>n</sub>)
Discussion
12.

The reflection co-efficient magnitude of a binomial multisection transformer is:

A. 2<sup>N</sup>│A││cos (θ)│<sup>N</sup>
B. 2<sup>N</sup>│A│
C. 2<sup>N</sup>│cos (θ) │<sup>N</sup>
D. none of the mentioned
Answer» B. 2<sup>N</sup>‚Äö√Ñ√∂‚àö√Ü‚àö√°A‚Äö√Ñ√∂‚àö√Ü‚àö√°
Discussion
13.

The condition │Г (θ) │=0 for θ=π/2 of a binomial multi section transformer corresponds to the:$

A. upper cutoff frequency
B. lower cutoff frequency
C. center frequency
D. none of the mentioned
Answer» D. none of the mentioned
Discussion
14.

To obtain a flat curve in the response of a binomial multisection transformer, N-1 derivatives of │Г (θ) │are set to zero. This implies:$

A. the frequency sensitivity of the matching section is increased linearly
B. the frequency sensitivity of the matching section is increased exponentially
C. roll off in the curve is increased
D. none of the mentioned
Answer» E.
Discussion
15.

The response curve of a binomial matching transformer is plotted for each section of the matching network individually and then analyzed for optimum solution.

A. true
B. false
Answer» C.
Discussion
16.

If a quality binomial matching transformer gives a good flat response curve, it is called “maximally flat”.$

A. true
B. false
Answer» B. false
Discussion
17.

The passband response of a binomial matching transformer can be called optimum:

A. if the roll off in the response curve is high
B. if the response is flat in the impedance matched region
C. if the matching network is frequency sensitive
D. none of the mentioned
Answer» C. if the matching network is frequency sensitive
Discussion