71. Most dominant mode in a traveling wave magnetron is the one in which
72. In a microwave measurement setup, the power roughing to the load is found to be 50 mW. If a 3 dB coupler is placed before the load, the power to the load will be
73. In a parallel plate waveguide, what is the principal wave?
74. In cavity magnetron, strapping is used to
75. Consider the following statements about the maximum usable frequency for radio communication between two specified points by reflection from an ionosphere layer:
1. It is equal to the critical frequency
2. It is more than the critical frequency
3. It depends upon the distance between the two points
4. It depends upon the height of the ionosphere layer
Of these statements
1. It is equal to the critical frequency
2. It is more than the critical frequency
3. It depends upon the distance between the two points
4. It depends upon the height of the ionosphere layer
Of these statements
76. What is the frequency range of VHF electromagnetic waves?
77. Avalanche Photodiodes are preferred over PIN diodes in optical communication systems because of
78. The field configuration in two different view of waves propagating in a rectangular waveguide, as shown in the given figure represents the mode
79. Which of the following diode is very suitable for switching high frequency signals ON and OFF?
80. Which of the following is a cross-field device?
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