Discussion
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- Question
Oscillations are obtained from a reflex klystron only for combinations of anode voltage and repeller voltage that give a favourable transit time.
Options- A. True
- B. False
- Correct Answer
- True
- 1. In 8 cavity magnetron the p mode corresponds to a total phase shift equal to
Options- A. ± 8 p radians around the periphery
- B. ± 4 p radians around the periphery
- C. ± 2 p radians around the periphery
- D. ± 16 p radians around the periphery Discuss
- 2. Which of the following statements is not correct regarding modes of electromagnetic energy transmission?
Options- A. In TE mode the direction of electric field is always and everywhere transverse to the direction of propagation
- B. In TM mode the magnetic field pattern is always and everywhere transverse to the direction of propagation
- C. The subscripts is TE and TM designations denote the number of half sine wave variations of the field components in x and y directions respectively.
- D. TM11 is called the dominant mode. Discuss
- 3. If the peak transmitted power in a radar is increased by a factor 81, the maximum range is increased by a factor of
Options- A. 3
- B. 9
- C. 27
- D. 81 Discuss
- 4. The noise figure of klystron amplifier is about
Options- A. 25 dB
- B. 3 dB
- C. zero
- D. 1 dB Discuss
- 5. If air pressure in a rectangular waveguide is increased the maximum power handling capacity
Options- A. is decreased
- B. is increased
- C. remains the same
- D. may increase or decrease depending on pressure Discuss
- 6. In microwave communication links the fading due to rain occurs. The methods to solve this problem include
Options- A. antenna replacement and feed correction
- B. amplitude trimming and phase correction
- C. polarization shifting and code diversity
- D. path diversity and frequency diversity Discuss
- 7. A microwave connector should have high SWR.
Options- A. True
- B. False Discuss
- 8. In the given figure shows a 10dB directional coupler. If power input at port 1 is 100 mW, power output at port 3 is
Options- A. 10 mW
- B. 15 mW
- C. 20 mW
- D. 25 mW Discuss
- 9. In Gunn diode electrons are transferred from
Options- A. Ridge guide is essentially a form of capacitively loaded guide
- B. low to high mobility energy bands
- C. valley to domain formation
- D. domain to valley formation Discuss
- 10. Satellite communication systems use the frequency band
Options- A. 10 to 20 MHz
- B. 50 to 70 MHz
- C. 3 to 6 GHz
- D. 100 to 120 GHz Discuss
Microwave Communication problems
Search Results
Correct Answer: ± 8 p radians around the periphery
Correct Answer: TM11 is called the dominant mode.
Correct Answer: 3
Correct Answer: 25 dB
Correct Answer: is increased
Correct Answer: path diversity and frequency diversity
Correct Answer: False
Correct Answer: 10 mW
Correct Answer: Ridge guide is essentially a form of capacitively loaded guide
Correct Answer: 3 to 6 GHz
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