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Microwave Engineering: Waveguides and Passive Devices
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Microwave Engineering: Waveguides and Passive Devices
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25 Questions

1. If the reflection co efficient of a 2 port network is 0.25 then the return network loss in the network is:
2. A coaxial cable is air filled with air as dielectric with inner and outer radius equal to 1 mm and 4 mm. If the surface resistivity is 1.84*10-2Ω,then the attenuation due to conductor loss is:
3. The propagation constant of TEmn mode of propagation for a cylindrical cavity resonator is:
4. The equivalent resistance of a short circuited λ/4 transmission line is independent of the characteristic impedance of the transmission line.
5. A cylindrical cavity resonator can be constructed using a circular waveguide.
6. Shunt stubs are preferred for:
7. Admittance and impedance matrices of a micro waves network are related as:
8. Unloaded Q of a rectangular waveguide cavity resonator:
9. For co-axial lines and waveguides, ________ is more preferred.
10. The expression for total reflection in the simplified form is given by:
11. If the attenuation due to dielectric loss and attenuation due to conductor loss in a microstrip transmission line is 0.024Np/m and 0.0724 Np/m, then the unloaded quality factor if the propagation constant is 151 is:
12. In a two port network, if current at port 2 is 2A and voltage at port 1 is 4V, then the impedance Z₁₂ is:
13. 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:
14. In order to obtain the resonant frequency of a rectangular waveguide, the closed cavity has to satisfy:
15. If the loss tangent of a rectangular waveguide is 0.0004, then Q due to dielectric loss is:
16. If the normalized admittance at a point on a transmission line to be matched is 1+j1.47. Then the normalized susceptance of the stub used for shunt stub matching is:
17. The overall reflection coefficient of a matching quarter wave transformer cannot be calculated because of physical constraints.
18. The loss tangent for a circular cavity resonator is 0.0004.Then the unloaded Q due to dielectric loss is:
19. 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:
20. A microstrip patch antenna has a width of 5.08mm and surface resistivity of 1.84*10-2. Then the attenuation due to conductor loss is:
21. Quality factor of a coaxial cable transmission line is independent of the medium between the wires of the transmission line.
22. Given the dimension of the waveguide as b
23. For a load impedance of ZL=60-j80. Design of 2 single-stub shunt tuning networks to match this load to a 50Ω line is to be done. What is the normalized admittance obtained so as to plot it on smith chart?
24. If ZL< Z0, then the reflection coefficient at that junction is:
25. A circular cavity resonator has a wave number of 151, radius of 2.74 cm, and surface resistance of 0.0184Ω. If the cavity is filled with a dielectric of 2.01, then unloaded Q due to conductor loss is:

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