41. Transferred electron bulk effect occurs in which of the following?
42. A 20 B directional coupler is shown in the figure
The power output at port 3 will be
The power output at port 3 will be
43. The cutoff wavelength in a standard rectangular waveguide for the TE11 mode is:
44. X-band frequencies are in which one of the following ranges?
45. Which of the following is not a negative resistance device?
46. An ideal local oscillator for microwave frequency measurements, The most suitable microwave source is a
47. Evanescent mode attenuation in a waveguide depends upon the
48. A parametric amplifier has to be cooled
49. In order to couple two generators to a wave guide system without coupling them to each other one, one could not use a
50. Consider the following statements:
For a square waveguide of cross section 3 cm × 3 cm it has been found
1. At 6 GHz dominant mode will propagate
2. At 4 GHz all the modes are evanescent
3. At 11 GHz only dominant modes and no higher order mode will propagate
4. At 7 GHz degenerate modes will propagate
Which of the above statements are correct?
For a square waveguide of cross section 3 cm × 3 cm it has been found
1. At 6 GHz dominant mode will propagate
2. At 4 GHz all the modes are evanescent
3. At 11 GHz only dominant modes and no higher order mode will propagate
4. At 7 GHz degenerate modes will propagate
Which of the above statements are correct?
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