Microwave Communication problems
- 1. As frequency is increased, the skin effect
Options- A. increases
- B. decreases
- C. remains the same
- D. either (b) or (c) Discuss
Correct Answer: increases
- 2. At millimeter wavelength the favoured mode in circular wave guide is
Options- A. TE01
- B. TE11
- C. TE20
- D. TE21 Discuss
Correct Answer: TE01
- 3. In a TWT the phase velocity of the axial component of the field on the slow wave structure is kept
Options- A. equal to velocity of electron
- B. slightly less than velocity of electron
- C. slightly more than velocity of electron
- D. equal to velocity of light in free space Discuss
Correct Answer: equal to velocity of electron
- 4. Microwaves
Options- A. get reflected by ionosphere
- B. are absorbed by ionosphere
- C. are neither reflected nor absorbed by ionosphere
- D. are both reflected and absorbed by ionosphere Discuss
Correct Answer: are neither reflected nor absorbed by ionosphere
- 5. Performance of a PIN diode switch is represented by
Options- A. insertion loss when switch is off
- B. insertion loss when switch is on
- C. insertion loss when switch is on and isolation loss when switch is off
- D. insertion loss when switch is off and isolation loss when switch is on Discuss
Correct Answer: insertion loss when switch is on and isolation loss when switch is off
- 6. The manufacturing technique used to manufacture strip type transmission line is
Options- A. photoetching technique
- B. oxidation technique
- C. cladding
- D. epitaxial Discuss
Correct Answer: photoetching technique
- 7. In microstrip line has dielectric material most commonly used is
Options- A. silicon
- B. rubber
- C. plastic
- D. bakelite Discuss
Correct Answer: silicon
- 8. In the given figure power meters at A and B indicate 1 mW and 110 ?W respectively. VSWR of line is
Options- A. 1.5
- B. 2
- C. 2.5
- D. 3 Discuss
Correct Answer: 2
- 9. The earliest uses of electromagnetic waves were
Options- A. point to point communication
- B. radar
- C. both (a) and (b)
- D. neither (a) nor (b) Discuss
Correct Answer: both (a) and (b)
- 10. An electromagnetic wave can be completely guided by a dielectric rod or slab.
Options- A. True
- B. False Discuss
Correct Answer: True
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