61. In an H-plane tee
62. A reflex Klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the
63. The main disadvantage of the two hole directional coupler is
64. Indicate the false statement-
When the free-space wavelength of a signal equals the cut-off wavelength of the guide-
When the free-space wavelength of a signal equals the cut-off wavelength of the guide-
65. In a Gunn diode, the negative resistance is due to
66. Phase focusing, which leads to bunching of electrons takes place in which of the following?
67. In microwave telemetry, repeated station are required to cover large area. What is, generally, the distance between repeater stations?
68. Which of the following materials used in tunnel diode
69. Schottky diode has high switching speed because:
70. The idler frequency of a non de-generate parametric amplifier with input frequency fi and pump frequency fp is
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