Page 22 - E BOOK MICROWAVE DEVICES 2023
P. 22
CIRCULAR POLARIZATION
When a wave is circularly polarized, the
electric field vector appears to be rotated
with all its components loosing
orientation. The mode of rotation may also
be different at times. However, by using
circular polarization, the effect of multi-
path gets reduced and hence it is used in
satellite communications such as GPS.
LINEAR POLARIZATION
When a wave is transmitted or received, it
may be done in different directions. The
linear polarization of the antenna helps in
maintaining the wave in a particular
direction, avoiding all the other directions.
Though this linear polarization is used, the
electric field vector stays in the same plane.
Hence, we use this linear polarization to
improve the directivity of the antenna.
17
PROPERTIES OF ANTENNA
