81. Same Amplitude, 90° phase difference indicate which polarization?
82. A radar transmitter has a PRF of 1500 PPS and a pulse width of 1 micro second. Its duty cycle is
83. A chip radar is another name for a
84. Consider the following:
1. Synch
2. Video
3. Sweep
4. Sound
Which of the voltages are found in the output of a normal monochrome receiver video detector?
1. Synch
2. Video
3. Sweep
4. Sound
Which of the voltages are found in the output of a normal monochrome receiver video detector?
85. The sensitivity of a radar receiver is ultimately set by
86. The satellite communication link between two point is established with uplink carrier-to-noise ratio of 20 dB and downlink carrier to noise ratio of 14 dB. The overall C/N is close to:
87. In a typical mobile satellite array antenna, if three elements are activated, how many elements are deactivated?
88. The biggest disadvantage of CW Doppler radar is that
89. If the minimum range of a radar is to be doubled, the peak power has to be increased by a factor of
90. Helical antenna is used for satellite tracking because of its
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