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Analog Communications
Analog Communications Basic
Quiz 1
Solution
Q.1.
Which of the following term is not applied to the Yagi-Uda array?
a) low impedance
b) high gain
c) good bandwidth
d) high reception of signals
Q.2.
An antenna can be matched to a feed line by using an LC network only.
a) True
b) False
Q.3.
An array with one driven element, a reflector, and one or more directors is called ________
a) Yagi
b) Marconi
c) Simple Dipole
d) Folded Dipole
Q.4.
The energy picked up by a parabolic antenna is concentrated at the ________
a) edges
b) center
c) corners
d) focus
Q.5.
Antennas are often tested in ________
a) an RF reflective chamber
b) a vacuum chamber
c) an anechoic chamber
d) atmosphere
Q.6.
Which one of the following consists of non-resonant antennas?
a) folded dipole
b) simple dipole
c) rhombic antenna
d) broadside array
Q.7.
Which one of the following is very useful as a multiband HF receiving antenna?
a) folded dipole
b) log periodic
c) conical horn
d) rectangular horn
Q.8.
Which among the following is not a reason for the use of antenna coupler?
a) To make the antenna look resistive
b) To provide the output amplifier with correct load impedance
c) To discriminate against harmonics
d) To prevent re-radiation of the local oscillator
Q.9.
Why top loading is used with an antenna?
a) to increase its effective height
b) to increase its beamwidth
c) to increase its bandwidth
d) to increase its impedance
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