Satellite Systems

Wireless & Mobile Communications

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Paging System”.

1. A helical antenna is used for satellite tracking because of _________
a) Circular polarization
b) Maneuverability
c) Beamwidth
d) Gain

2. Repeaters inside communications satellites are known as ___________
a) Transceivers
b) Transponders
c) Transducers
d) TWT

3. ___________ is the geographical representation of a satellite antenna radiation pattern.
a) Footprint
b) Spot
c) Earth
d) Region

4. The smallest beam of a satellite antenna radiation pattern is ________
a) Zone beam
b) Hemispheric beam
c) Spot beam
d) Global beam

5. _________ detects the satellite signal relayed from the feed and converts it to an electric current, amplifies and lowers its frequency.
a) Horn antenna
b) LNA
c) Satellite receiver
d) Satellite dish

6. A satellite signal transmitted from a satellite transponder to earth’s station is _________
a) Uplink
b) Downlink
c) Terrestrial
d) Earthbound

7. __________ is a loss of power of a satellite downlink signal due to earth’s atmosphere.
a) Atmospheric loss
b) Path loss
c) Radiation loss
d) RFI

8. Which of the following is the point on the satellite orbits closest to the Earth?
a) Apogee
b) Perigee
c) Prograde
d) Zenith

9. What kind of battery panels are used in some advanced satellites?
a) Germanium based panels
b) Silicon based panel
c) Gallium Phosphate solar panel array
d) Gallium Arsenide solar panel array

10. A satellite battery has more power but lighter _________
a) Lithium
b) Leclanche
c) Hydrogen
d) Magnesium

11. INTELSAT stands for ___________
a) Intel Satellite
b) International Telephone Satellite
c) International Telecommunications Satellite
d) International Satellite

12. The frequency of Ku band for satellite communications is __________
a) 6/4 GHz
b) 14/11 GHz
c) 12/14 GHz
d) 4/8 GHz

13. The most common device used as an LNA is ________
a) Zener diode
b) Tunnel diode
c) IMPATT
d) Shockley diode

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