- A. Earth-to-satellite link
- B. Satellite-to-earth link
- C. Satellite-to-satellite link
- D. None of these
Satellite Communication
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A satellite cross-link means_____.
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The radiation patterns of earth coverage antennas have a beamwidth of approximately_____.
- A. 21˚
- B. 5˚
- C. 17˚
- D. 35˚
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Which of the following is the first commercial satellite?
- A. Early Bird
- B. Telstar
- C. Explorer
- D. Courier
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A satellite beam that covers almost 42.4% of the earths surface.
- A. Zone beam
- B. Hemispheric beam
- C. Spot beam
- D. Global beam
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Earth station uses what type of antenna_____.
- A. Despun antenna
- B. Helical antenna
- C. Toroidal antenna
- D. Cassegrain antenna
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What is the local oscillator (mixer) frequency of the satellite with an uplink frequency in GHz band?
- A. 3500 MHz
- B. 4500 MHz
- C. 2225 MHz
- D. 2555 MHz
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Is the geographical representation of a satellite antenna radiation pattern_____.
- A. Footprint
- B. Spot
- C. Earth
- D. Region
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Most mobile satellite array uses _______ in transforming 50 to 150 Ω impedance.
- A. Stub
- B. Balun
- C. Quarter-wavelength transformer
- D. Microstrip tapers
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Which of the following is the first active satellite?
- A. Echo I
- B. Telstar I
- C. Early Bird
- D. Sputnik I
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Satellite engine uses_____.
- A. Jet propulsion
- B. Ion propulsion system
- C. Liquid fuel
- D. Solar jet