A Best Way To Crack Gorenment Job Exams

Electronics Engineering Objective Questions { Antenna }

120. Which antenna does not depend on frequency?
A. Yagi-Uda
B. Folded-dipole
C. Log periodic antenna
D. None of the above
Discuss in Forum

121. The parabolic and lens antennas are used extensively at
C. Microwaves
D. All of the above
Discuss in Forum

122. The radiation pattern of helical antenna (axial mode) is represented by
A. figure A
B. figure B
C. figure C
D. figure D
Discuss in Forum

123. In E-plane metal plate lens antenna
A. travelling wave fronts are retarded
B. tavelling wave front are accelerated
C. travelling wave front remains unaffected
D. None of the above
Discuss in Forum

124. In H-plane metal plate lens the travelling wave front is
A. totally retarded
B. retarded
C. accelerated
D. neither accelerated nor retarded
Discuss in Forum

125. Antenna radiation efficiency is given by Radiation resistance
A. Antenna resistance
B. Antenna resistance
C. Radiation resistance
D.Maximum power gain
Discuss in Forum

126. Antenna aperture efficiency is given by
A. DX2
C. 47cA
D. 4nA
Discuss in Forum

Page 18 of 20

« 16 17  18  1920 »