Satellite Communication(Electrical Engineering ) Questions and answers for exam Preparation

Question 1. Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance.

Stub
Balun
Quarter-wavelength transformer
Microstrip tapers

Explanation:-

Answer: Option C. -> Quarter-wavelength transformer

Question 2. VSAT was made available in

1979
1981
1983
1977

Explanation:-

Answer: Option A. -> 1979

Question 3. What band does VSAT first operate?

L-band
X-band
C-band
Ku-band

Explanation:-

Answer: Option C. -> C-band

Question 4. A satellite signal transmitted from a satellite transponder to earth’s station.

Uplink
Downlink
Terrestrial
Earthbound

Explanation:-

Answer: Option B. -> Downlink

Question 5. A helical antenna is used for satellite tracking because of

Circular polarization
Maneuverability
Beamwidth
Gain

Explanation:-

Answer: Option A. -> Circular polarization

Question 6. Repeaters inside communications satellites are known as

Trancievers
Transponders
Transducers
TWT

Explanation:-

Answer: Option B. -> Transponders

Question 7. The radiation patterns of earth coverage antennas have a beamwidth of approximately

21°
5°
17°
35°

Explanation:-

Answer: Option C. -> 17°

Question 8. A satellite batter has more power but lighter.

Lithium
Leclanche
Hydrogen
Magnesium

Explanation:-

Answer: Option A. -> Lithium

Question 9. What kind of battery panels are used in some advance satellites

Germanium based panels
Silicon based panel
Galium Phosphate solar panel array
Galium Arsenide solar panel array

Explanation:-

Answer: Option D. -> Galium Arsenide solar panel array

Question 10. The bandwidth of C-band satellite frequency band in U.S.

500 GHz
1000 GHz
1000 MHz
500 MHz

Explanation:-

Answer: Option D. -> 500 MHz