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Free download in PDF Satellite Communication General Knowledge Short Questions & Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
As the height of a satellite orbit gets lower, the speed of the satellite _________.
[A]
increases
[B]
decreases
[C]
remains the same
[D]
None of the above
42
What is the delay time for satellite transmissions from earth transmitter to earth receiver?
[A]
0.5 s
[B]
1s
[C]
5 ms
[D]
0.25 s
43
A method of multiple accessing where a given RF channel bandwidth is divided inot smaller frequency band.
[A]
CDMA
[B]
ANIK-D
[C]
TDMA
[D]
FDMA
44
The switching from one element to the other element in a typical mobile satellite array.
[A]
Series
[B]
Radial
[C]
Matrix
[D]
Shunt
45
Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance.
[A]
stub
[B]
balun
[C]
quarter-wavelength transformer
[D]
microstrip tapers
Answer: quarter-wavelength transformer
46
What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array?
[A]
Radial divider
[B]
Divider/combiner
[C]
Radial combiner
[D]
Radial multiplexer
47
In a typical mobile satellite array antenna if three elements are activated, how many elements are deactivated?
48
A mobile satellite array has usually how many elements?
[A]
6
[B]
88
[C]
12
[D]
14
49
The most common device used as an LNA is
[A]
zener diode
[B]
tunnel diode
[C]
IMPATT
[D]
Shockley diode
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