Satellite Communication Systems MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Satellite Communication Systems”.

1. The transmitter-receiver combination in the satellite is known as a _______
a) Relay
b) Repeater
c) Transponder
d) Duplexer

2. The downlink frequency is lower than the uplink frequency.
a) True
b) False

3. The satellite that is used as a relay to extend communication distance is called as __________
a) Relay satellites
b) Communication satellites
c) Repeater satellites
d) Geosynchronous satellites

4. What is the reason for carrying multiple transponders in a satellite?
a) More number of operating channel
b) Better reception
c) More gain
d) Redundancy

5. What is the reason for shifting from c band to ku band in satellite communication?
a) Lesser attenuation
b) Less power requirements
c) More bandwidth
d) Overcrowding

6. What is the maximum theoretical data rate if a transponder is used for binary transmission and has a bandwidth of 36MHz?
a) 32Mpbs
b) 72Mpbs
c) 36Mpbs
d) 12Mpbs

7. Why are VHF, UHF, and microwave signals used in satellite communication?
a) More bandwidth
b) More spectrum space
c) Are not diffracted by the ionosphere
d) Economically viable

8. Which of the following bands cannot be used for satellite communication?
a) MF
b) Ku
c) X
d) C

9. Why are techniques like frequency reuse and spatial isolation carried out?
a) Reduce traffic load
b) More gain
c) High speed
d) Error detection

10. Which technique uses two different antennas to reduce traffic on the same frequency?
a) Spatial isolation
b) Frequency reuse
c) Multiplexing
d) Modulation

11. Spatial-division multiple access (SDMA) depends on satellite location and not frequency.
a) True
b) False

12. Which technique uses spot beam antennas to divide the area covered by the satellite into smaller segments?
a) Spatial isolation
b) Frequency reuse
c) Multiplexing
d) Modulation

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