Related Questions

A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be
A A decrease in range
B A reduction in horizontal resolution
C No noticeable effect
D A decrease in gain
The frequency of Ku band for satellite communications.
A 4 - 8 GHz
B 12 - 18 GHz
C 8 - 12 GHz
D 26 - 40 GHz
What frequency range is used for TV transmission and low power microwave applications?
A Very Low Frequency : 3 kHz to 30 kHz
B Medium Frequency : 300 kHz to 3 MHz
C Ultra High Frequency : 300 MHz to 3000 MHz
D Super High Frequency : 3000 MHz to 30000 MHz
E None of the above
The maximum usable range of the usual radar set (on any particular range setting) is determined by
A The width of the transmitted pulses
B The interval between transmitted pulses
C The bandwidth of the receiver IF stages
D The duty cycle
When it is desired that short-range targets be clearly seen on a pulsed-radar set, it is important that the receiver and display system have
A A long time constant
B Low-pass filters
C The shortest possible time
D The restricted high-frequency response
It is possible to increase the maximum range of a radar equipment by
A Lowering the pulse frequency
B Raising the peak power of the transmitter
C Narrowing the beam width and increasing the pulse duration
D All of these
If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers
A Must remain as before
B Must be increased
C May be decreased
D Must be doubled
Microwave frequencies are normally regarded as those in the range of
A 1 to 500 MHz
B 1000 to 10,000 GHz
C 1 to 100 GHz
D 10 to 1000 GHz
The frequency range for satellite communication is
A 3 to 30 kHz
B 300 to 3000 kHz
C 3000 to 30000 MHz
D 30000 to 300000 MHz
For interpolation of satellite data used for monitoring dynamic changes that occurs on the earth surface, the most suitable orbit for the satellite is:
A Circular orbit
B Sun-synchronous orbit
C Near polar orbit
D None of these

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