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- Question
Which modes of circular wave guides have circular symmetry?
Options- A. TE11
- B. TE11 and TE21
- C. TE01
- D. TE01 and TM01
- Correct Answer
- TE01 and TM01
- 1. Guide wavelength (?g), cutoff wavelength (?c) and free space wavelength (?0) of a waveguide are related as
Options- A.
- B.
- C.
- D.
Discuss
- 2. Which of these statements is correct?
Options- A. Ridge guide is essentially a form of capacitively loaded guide.
- B. Ridge guide is essentially a form of inductively loaded guide.
- C. Ridge guide is essentially a form of resistively loaded guide.
- D. Ridge guide has higher power handling capacity than rectangular waveguide. Discuss
- 3. In a multicavity klystron amplifier the electron velocity of the order of
Options- A. 10 m/s
- B. 103 m/s
- C. 106 m/s
- D. 1012 m/s Discuss
- 4. In a shield helix
Options- A. the spacing between adjacent turns is very large
- B. the spacing between adjacent turns approaches zero
- C. the spacing between adjacent turns approaches zero and wire thickness approaches zero
- D. the spacing between adjacent turns is very large wire thickness approaches zero Discuss
- 5. In a coaxial line
Options- A. the characteristic impedance is less than that of two wire line
- B. the wave velocity is less than that of two wire line
- C. both (a) and (b)
- D. neither (a) nor (b) Discuss
- 6. In a Gunn diode oscillator drift velocity of electron is 107 cm/s and active region length is 10 x 10-4 cm. The natural frequency of oscillation is
Options- A. 1 MHz
- B. 10 MHz
- C. 1 GHz
- D. 10 GHz Discuss
- 7. For a given operating frequency a waveguide has more power handling capacity than a coaxial line.
Options- A. True
- B. False Discuss
- 8. In a backward wave oscillator the efficiency
Options- A. is much higher than in TWT
- B. is much lower than in TWT
- C. is almost the same as in TWT
- D. either (a) or (b) Discuss
- 9. Generally the wall thickness of rectangular waveguide is
Options- A. about 1-5 mils
- B. about 40-100 mils
- C. about 0.1 to 0.5 mils
- D. about 500 mils Discuss
- 10. VSWR = Emax/Emin.
Options- A. True
- B. False Discuss
Microwave Communication problems
Search Results
Correct Answer:
Correct Answer: Ridge guide is essentially a form of capacitively loaded guide.
Correct Answer: 106 m/s
Correct Answer: the spacing between adjacent turns approaches zero and wire thickness approaches zero
Correct Answer: both (a) and (b)
Correct Answer: 10 GHz
Correct Answer: True
Correct Answer: is almost the same as in TWT
Correct Answer: about 40-100 mils
Correct Answer: True
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