Contents I. Introduction
With the development of satellite communications, the role of high-performance circularly polarized antennas is becoming more and more significant [1]. The advantages of circularly polarized antennas are mainly reflected in three aspects, one is that circularly polarized antennas can receive incoming waves of arbitrary polarization, and can also be received by arbitrarily polarized antennas, so circularly polarized antennas are commonly used in electronic reconnaissance and jamming [2]; Second, the characteristic of rotational orthogonality of circularly polarized antennas is widely used in communications, radar and electronic countermeasures [3]; Third, when the circularly polarized wave is incident to a symmetrical target such as a plane or a sphere, the rotation is reversed, so the circularly polarized antenna is used in mobile communications, GPS, etc. to suppress rain and fog interference and anti-multipath reflection [4].
