Ferrite Circulators MCQ’s

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This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Ferrite Circulators”.

1. The total number of ones in the scattering matrix of an ideal circulator is:
a) 4
b) 3
c) 2
d) 5

2. There is no method in which the scattering matrix of the opposite circularity can be obtained from the matrix we have.
a) True
b) False

3. ________ is a three-port microwave device that can be lossless and matched at all spots.
a) Hybrid junction
b) Magic Tee
c) Circulator
d) Isolator

4. Practically, opposite circulatory in a ferrite circulator can be obtained by:
a) Changing the order of port operation
b) Impedance matching the input ports
c) Changing the polarity of the magnetic bias field
d) None of the mentioned

5. In the scattering matrix representation of a non-ideal circulator, the diagonal elements of the matrix are:
a) Zero
b) One
c) Reflection coefficient Г
d) None of the mentioned

6. The dielectric resonator in the circulator has a single highest order resonant mode.
a) True
b) False

7. A circulator device can also used as an isolator with a few modifications.
a) True
b) False

8. In a stripline junction circulator, the ferrite material is present in the form of a:
a) Slab
b) Ferrite disk
c) Ferrite material is not used in a microstrip circulator
d) Ferrite cubes

9. In the plot of the magnitude of electric field around the periphery of the junction circulator, the curve has:
a) Three peaks
b) Two peaks
c) Four peaks
d) None of the mentioned

10. In the non-ideal scattering matrix representation of the circulator, the attenuation constant and phase constant α, β respectively are approximated as 1.
a) True
b) False

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