Overview

Circular polarized antenna refers to the angle between the polarization surface of radio waves and the normal plane of the earth, which varies periodically from 0 to 360 degrees. The trajectory of the electric field vector at the end is projected as a circle on a plane perpendicular to the propagation direction. This type of antenna can provide a stable link between the transmitting antenna and the receiving antenna, and has the ability to improve multipath distortion and polarization mismatch. In addition, circularly polarized antennas also have the advantages of small size, light weight, and easy manufacturing.

Features

The main technical features of circularly polarized FM antennas include the following aspects:
Polarization direction adaptability: Circular polarized antennas have strong adaptability to polarization direction. Regardless of the orientation of the receiving antenna, the transmitted signal is the same and will not differ due to different polarization directions. This characteristic enables circularly polarized antennas to perform well in complex electromagnetic environments and effectively resist the effects of polarization mismatch.
The anti-interference ability of multipath propagation: In multipath propagation environments, circularly polarized antennas perform well and can reduce signal fading. Due to the rotation of electric field vectors around the propagation direction in space, signals transmitted from different paths are not easily cancelled out by each other during reception like linearly polarized antennas, thus ensuring the stability of communication.