Microwave Engineering Lab Viva Questions – Part 7

1. Kuroda identities are not used for

A. Transferring short to open

B. Design realizable characteristic impedance

C. Eliminate lumped impedances and capacitors

D. Add spacing between stubs

Answer : [C] Eliminate lumped impedances and capacitors

 

2. Richard transom and Kuroda identities are only used for the realization of

A. Low pass filter and Band pass filter

B. Low pass filter and high pass filter

C. Band stop filter and band pass filter

D. Low pass filter and band stop filter

Answer : [D] Low pass filter and band stop filter

3. Design with commensurate lines involves

A. Transmission lines with lambda/8 lines only

B. Transmission lines having same length

C. Transmission lines with lambda/4 lines only

D. Transmission line with only open circuit stubs

Answer : [B] Transmission lines having same length

4. Redundant filter synthesis yields

A. Non-periodic filter response

B. A response same as lumped element filter

C. Filter response Periodic in 4 W

D. Filter response Periodic in 2 W

Answer : [C] Filter response Periodic in 4 W

5.

i) In stepped impedance filter, frequency response repeats non-periodically.

ii) Stepped impedance filter has different impedance for different steps

A. Both are true and (ii) is the reason for( i)

B. (i ) is true and( ii) is false

C. Both are false

D. Both are true and (ii) is not the reason for (i)

Answer : [D] Both are true and (ii) is not the reason for (i)

6. For better stepped impedance filter performance

(i)

(Zh/Zl) should be as high as possible

(ii) Bl should be greater than

Pi/4

a. should be as high as possible

b. Both are true

c. Both are false

d. (i) True (ii)False

e. (i) False (ii) True

Answer : [C] Both are false

7. A matching network is required at the load terminal of

A. 4rd order butter worth filter

B. 3th order butter worth filter

C. 4th order cheby shev filter

D. 3rd order chebyshev filter

Answer : [C] 4th order cheby shev filter

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9. If an inductor of L=10, is approximated to a transmission line section of characteristic impedance 200, what will be the length of the line at 4GHz.

A. 1.89 mm

B. 5.96 mm

C. 18.72 mm

D. 1.67 mm

Answer : [B] 5.96 mm

10. A capacitor with admittance 0.1j is followed by a unit element with characteristic impedance 50 Ohms. For the equivalent circuit obtained by the Kuroda’s identity, the unit element characteristic

impedance and the inductor value are respectively,

A. 8.33, 41.66

B. 41.88, 8.33

C. 12, 60

D. 60, 12

Answer : [A] 8.33, 41.66