Double Stub Tuning MCQ’s

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

1. The major advantage of double stub tuning is:
a) it uses 2 tuning stubs in fixed positions
b) it involves 2 stubs
c) length of the stub is variable
d) none of the mentioned

2. In a double stub tuner circuit, the load is of _______ length from the first stub.
a) fixed length
b) arbitrary length
c) depends on the load impedance to be matched
d) depends on the characteristic impedance of the transmission line

3. The major disadvantage of single stub tuning is:
a) it requires a variable length of line between the load and the stub
b) it involves 2 variable parameters
c) complex calculation
d) none of the mentioned

4. Double stub tuners are fabricated in coaxial line are connected in shunt with the main co-axial line.
a) true
b) false

5. All load impedances can be matched to a transmission line using double stub matching.
a) true
b) false

6. Stub spacing that are near 0 and λ/2 lead to more frequency sensitive matching networks.
a) true
b) false

7. Impedance matching with a double stub tuner using a smith chart yields 2 solutions.
a) true
b) false

8. The simplest method of reducing the forbidden range of impedances is:
a) increase the distances between the stubs
b) reduce the distance between the stubs
c) increase the length of the stubs
d) reduce the length of the stubs

9. The standard stub spacing usually used is:
a) 0, λ/2
b) λ/4, λ/8
c) λ/8, 3λ/8
d) none of the mentioned

10. If the length of the line between the first stub and the load can be adjusted, the admittance can be moved from the forbidden region.
a) true
b) false

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