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Microwave Communication

Microwave Communication
Rainfall is an important factor for fading of radio waves at frequencies above

1 GHz
10 GHz
100 MHz
100 GHz

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Microwave Communication
The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the

Inter-electrode capacitance
Electron transit time
Distributed lead inductance
Degree of emission from the cathode

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Microwave Communication
The frequency of the oscillation generated by a magnetron, is mainly determined by

The number of the cavity resonators
The dimension of each cavity resonator
The flux density of the external magnet
The ratio of the dc cathode voltage to the magnetic flux density

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Microwave Communication
The maximum usable range of the usual radar set (on any particular range setting) is determined by

The bandwidth of the receiver IF stages
The duty cycle
The width of the transmitted pulses
The interval between transmitted pulses

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Microwave Communication
The antenna separations (in meters) required for optimum operation of a space diversity system can be calculated from:where R = effective earth radius (m) and L = path length (m)

S = 3λR/L
S = λR/RL
S = 2λR/L
S = λR/L

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Microwave Communication
Microwave frequencies are normally regarded as those in the range of

10 to 1000 GHz
1000 to 10,000 GHz
1 to 500 MHz
1 to 100 GHz

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MORE MCQ ON Microwave Communication

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