Broadband dual-circularly-polarized reflective array antenna and equipment based on reconfigurable dual-function layer

Abstract

The invention relates to the field of wireless communication system electronic devices, and discloses a broadband dual-circularly-polarized reflective array antenna and equipment based on a reconfigurable dual-function layer. The antenna comprises an X-band broadband dual-circularly-polarized feed source and a plane reflective array, the dual-circularly-polarized feed source is placed near a focal plane of the plane reflective array, the plane reflective array is composed of two function-layer-stacked dual-circularly-polarized phase shift surfaces, and the dual-circularly-polarized phase shift surfaces comprise a left-hand circular polarization selection surface and a right-hand circular polarization reflection surface. According to the invention, broadband dual-circularly-polarized beam regulation and control are realized in an X wave band by using polarization selection characteristics and circular polarization rotation phases of the polarization selection surface, a left-hand phase and a right-hand phase are simultaneously and independently regulated and controlled, broadband phase shift response is realized by using a processing mode of miniaturization of units such as a meander line structure, and the antenna ensures the final broadband characteristic of the dual-circularly-polarized reflective array antenna, has the advantages of replaceable functional layers, easy integration, low cost and the like, and has important application prospects in the fields of satellite communication and the like.

Description

technical field [0001] The invention belongs to the field of electronic devices of wireless communication systems, and in particular relates to a broadband double circular polarization reflection array antenna and equipment based on a reconfigurable dual-functional layer. Background technique [0002] Reflectarray antennas have great application value in the fields of earth observation and satellite communication. In this application environment, circular polarization is generally used to prevent polarization mismatch and improve the transmission code rate. At present, there are many passive element designs for circularly polarized reflectarrays. The good characteristics of single circularly polarized reflection can be achieved by using linear polarization or circularly polarized incidence, and using multi-resonant broadband elements. Planar reflectarray antennas are being used more and more widely because of their planar structure, light weight, low cost, low profile and lo...

AI Technical Summary

Problems solved by technology

Based on the sub-wavelength arrangement of phase-shifting units of different frequencies and different structures on the reflectarray, multi-frequency and multi-polarized reflectarray antennas have been realized. rare

[0003] The existing dual circularly polarized reflectarray antennas using dual functional layers are divided into two categories, the upper layer is a linear circular polarization converter, and the lower layer is a linearly polarized reflectarray antenna. The disadvantage is that there are many functional layers and a complex structure. , high profile, and narrow bandwidth; the other is to use a circular polarization selective surface and a half-wave plate reflection unit to realize the separation and independent control of the two circular polarizations through the circular polarization selection of the first functional layer. Difficult to miniaturize the unit, high profile, narrow bandwidth

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