71. The diode which is mainly used in harmonic generator circuits as frequency multiplier is
72. Indicate the false statement
Transient time in microwave tubes will be reduced if
Transient time in microwave tubes will be reduced if
73. For TE or TM modes of propagation in bounded media, the phase velocity
74. In a particular microwave tube an electron beam is traveling with an electromagnetic wave. The arrangement is such that beam of electrons gets accelerated. During this process
75. Blackbody radiation is enclosed inside a spherical cavity of radius r at a temperature T. What would be the temperature of the enclosure if the radius expands to 2r adiabatically?
76. Which vacuum based device is widely used as a power amplifier in satellite communication system?
77. A microwave junction is supposed to be matched if in the S-matrix
78. Consider the following statements relating to the micro-strip lines
1. Modes in micro-strip lines are purely TEM
2. Micro-strip lines is also called open strip line
3. Radiation loss in micro-strip line can be reduced by using thin high dielectric materials
4. Conformal transformation technique is quite suitable for solving micro problems
Which of the statements given above are correct?
1. Modes in micro-strip lines are purely TEM
2. Micro-strip lines is also called open strip line
3. Radiation loss in micro-strip line can be reduced by using thin high dielectric materials
4. Conformal transformation technique is quite suitable for solving micro problems
Which of the statements given above are correct?
79. A directional coupler with three or more holes is preferred to a two-hole coupler
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