ECE · all questions

Satellite Communication
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216

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Q201

In satellite communication, scrambling is mainly used for-

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Q202

For an orbiting satellite, in magnitude

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Q203

A television (TV) transmission using satellite is an example of which type of transmission?
1. Half duplex
2. Full duplex
3. Simplex

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Q204

A satellite communication link has uplink C/N₀ of 50 dB-Hz and downlink C/N₀ of 47 dB-Hz. What would be overall link C/N₀?

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Q205

Expensive tracking equipment is not requires for:

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Q206

What was the first commercial geostationary communication satellite?

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Q207

One of the following is found on board a weather satellite

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Q208

The number of Active transponders are carried by a high capacity satellite are

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Q209

If the peak transmitted power in a radar system is increased by a factor of 16, the maximum range will be increased by a factor of

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Q210

A radar system uses a rotating antenna

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Q211

Range resolution of a Linear Frequency Modulated pulse compression radar depends on which of the following factors:

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Q212

In satellite communication, Faraday rotation is caused by

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Q213

The usable bandwidth of a microwave because transponder for 6/4 satellite communication is generally

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Q214

The maximum range of a monostatic Radar is R. If a target having a Radar cross-section of 10 m² exists at R/2, what should be the target cross-section at 3R/2 to result in an equal signal strength at the Radar?

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Q215

An FM-CW (Frequency Modulated - Continuous Wave) Radar is essentially

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Q216

Which of the following statements on communication by geosynchronous satellites are correct?
1. The propagation loss over each direction (uplink are downlink) is about 200 dB at 5 GHz.
2. Radius of the geosynchronous orbit is 42250 km.
3. An arc of about 17° must be covered by the satellite antenna in the equatorial plane.
4. The polar regions are well covered by the satellite antenna.
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