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Microwave Engineering: Introduction to microwaves
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Microwave Engineering: Introduction to microwaves
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25 Questions

1. In series stub matching, if the normalized impedance at a point on the transmission line to be matched is 1+j1.33. Then the reactance of the series stub used for matching is:
2. For co-axial lines and waveguides, ________ is more preferred.
3. The major advantage of single stub tuning over other impedance matching techniques is:
4. Using the relation for total reflection co-efficient certain designs of matching networks can be made as per practical requirements.
5. Shunt stubs are preferred for:
6. Effective dielectric constant of a microstrip is given by:
7. The wave number of a stripline operating at a frequency of 10 GHz is:
8. Scattering matrix for a lossless matrix is:
9. The total approximate reflection coefficient is a finite sum of reflection co-efficient of individual matching section of the matching network.
10. The e-2jθ term in the expression for total reflection in a single section quarter wave transformer impedance matching network Г=Г1+ Г3e-2jθ signifies:
11. __________ is a region of Electromagnetic spectrum having frequency ranging from 1GHz to 100 GHz
12. If the standing wave ratio for a transmission line is 1.4, then the reflection coefficient for the line is:
13. In the expression for phase of the reflection coefficient, Lmin stands for :
14. The effective dielectric constant ∈r for a microstrip line:
15. Expression for ϴ means phase angle of the reflection co efficient r=|r|-e^jθ, the phase of the reflection co-efficient is:
16. The specific element Sij of the scattering matrix can be determined as:
17. The two adjustable parameters in single stub matching are distance'
18. Micro strip can be fabricated using:
19. Microstrip line can support a pure TEM wave.
20. If a λ/4 transmission line is used for impedance matching, then always Г1> Г3.
21. Which of the following is the main advantage of microwave
22. The overall reflection coefficient of a matching quarter wave transformer cannot be calculated because of physical constraints.
23. If the reflection coefficient of a transmission line is 0.4, then the standing wave ratio is:
24. A slotted line can be used to measure _____ and the distance of _____________ from the load.
25. With an increase in the operating frequency of a micro strip line, the effective di electric constant of a micro strip line:

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