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Antennas
Antennas Assessment
Quiz 1
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Q.1
The directivity of Yagi-Uda antenna is increased by adding ______
a) reflectors
b) driven element
c) directors
d) boom
Q.2
Directors are used to increase ______ of the Yagi-Uda antenna.
a) Directivity
b) Gain
c) Back lobe
d) Reflection away from the radiation
Q.3
What is the radiation pattern of a Yagi-Uda antenna?
a) Broad-side
b) End-fire
c) Collinear
d) Both Broadside and End-fire
Q.4
A narrow beam-width is obtained through a large number of directors.
a) True
b) False
Q.5
The dipole to which the power is applied directly from the feeder in the Yagi-Uda antenna is called as _____
a) Director
b) Reflector
c) Driven element
d) Boom
Q.6
Folded dipole is used than a single dipole in Yagi-Uda to obtain wider frequency range.
a) True
b) False
Q.7
In which of the following bands Yagi-Uda antenna operates?
a) HF-UFH
b) VLF-MF
c) LF-HF
d) UHF-EHF
Q.8
A Yagi-Uda antenna is ____
a) Only a super directive antenna
b) Only a super gain antenna
c) Both super directive and super gain
d) Neither super directive nor super gain
Q.9
In order to convert the bidirectional dipole to unidirectional system, we use _______
a) Active element
b) Driven element
c) Parasitic element
d) Isolator
Q.10
Which of the following will add the field of the driven element and will excite the next parasitic element to increase the gain of the antenna?
a) Director
b) Reflector
c) Active element
d) Boom
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