In an H-plane tee
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ECE · all questionsMicrowave Communication
Microwave Communication
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A reflex Klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the
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The main disadvantage of the two hole directional coupler is
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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-
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In a Gunn diode, the negative resistance is due to
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Phase focusing, which leads to bunching of electrons takes place in which of the following?
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In microwave telemetry, repeated station are required to cover large area. What is, generally, the distance between repeater stations?
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Which of the following materials used in tunnel diode
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Schottky diode has high switching speed because:
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The idler frequency of a non de-generate parametric amplifier with input frequency fi and pump frequency fp is
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Most dominant mode in a traveling wave magnetron is the one in which
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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
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In a parallel plate waveguide, what is the principal wave?
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In cavity magnetron, strapping is used to
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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
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What is the frequency range of VHF electromagnetic waves?
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Avalanche Photodiodes are preferred over PIN diodes in optical communication systems because of
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The field configuration in two different view of waves propagating in a rectangular waveguide, as shown in the given figure represents the mode
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Which of the following diode is very suitable for switching high frequency signals ON and OFF?
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Which of the following is a cross-field device?
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