In the radar guidance of missiles where the missile has its own radar and its extracts the tracking data from the target reflected energy, the technique is known as
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ECE · all questionsSatellite Communication
Satellite Communication
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For a GEO satellite, what is the free space loss (Ldb) at the equator in terms of carrier wavelength (λ)?
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In a satellite ground station, the received signal is directly amplified in a low noise parametric amplifier followed by a FET amplifier. The gains and effective noise temperatures of the amplifiers are 20 dB, 9.0 K and 10 dB, 200 K respectively. The effective noise temperature of the combination is
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Energy required for satellite is generally derived from
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The uplink and downlink frequencies are made different in satellite links in order to
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Linear velocity of a satellite equals
Where G(Gravity constant) = 6.67 × 10-11m3/kg-sec, M = mass of earth, r = radius of circular orbit
Where G(Gravity constant) = 6.67 × 10-11m3/kg-sec, M = mass of earth, r = radius of circular orbit
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For satellite communication, the frequency should be-
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A highly inclined and highly eccentric orbit used by majority of communication satellites launched by Russia is also known as
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In . . . . . . . . switching a dedicated link/path is established across the sender and the receiver which is maintained for the entire duration of conversation?
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The orbital period of a satellite in circular orbit of radius R from the centre of the earth, is proportional to:
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There is (are) . . . . . . . . orbit(s) for a GEO satellite.
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INTELSAT stands for
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In a satellite communication, the uplink power level is generally high and power level of the received down link signal is low because:
1. High signal attenuation due to free-space loss
2. Limited available down link power
3. Finite satellite down link antenna gain, which is dictated by the required coverage area
1. High signal attenuation due to free-space loss
2. Limited available down link power
3. Finite satellite down link antenna gain, which is dictated by the required coverage area
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A satellite link has same carrier to noise ratio in uplink as well as in downlink. Overall carrier to noise ratio will be-
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The angle of inclination of a satellite whose orbit is over the equator is
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Which one of the following techniques is not suitable for automatic satellite tracking?
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A geostationary satellite
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Diplexer is made of
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Doubling the aperture area of a radar's antenna increases the radar range by
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The signal is sent back to earth by satellite by means of
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