# Binomial Multi-section Matching Transformers MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Binomial Multi-section Matching Transformers”.

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

a) true

b) false

2. 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

3. 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

4. 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

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

a) 2^{N}│A││cos (θ)│^{N}

b) 2^{N}│A│

c) 2^{N}│cos (θ) │^{N}

d) none of the mentioned

6. 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

7. 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

8. The reflection coefficient Г_{N} in terms of successive impedances Z_{n} and Z_{n+1} when multisection transformers are used in a binomial matching transformer is given by:

a) 0.5ln (Z_{n+1}/Z_{n})

b) ln (Z_{n+1}/Z_{n})

c) 0.5ln (Z_{n}/Z_{n+1})

d) (Z_{n}/Z_{n+1})

9. 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

10. 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

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