Broadband dual-frequency dual-circularly polarized reflective array antenna with independently controllable wave beams

Abstract

The invention relates to the field of wireless communication system electronic devices, and discloses a broadband dual-frequency dual-circularly-polarized reflective array antenna with independent and controllable wave beams. The antenna comprises a dual-band broadband circularly-polarized feed source and a plane reflective array, and is characterized in that the dual-band broadband circularly-polarized feed source is placed near a focal plane of the plane reflective array; the planar reflection array comprises low-frequency and high-frequency dual-circular polarization phase shift units which are arranged in a common-caliber periodic staggered manner, and each dual-circular polarization phase shift unit comprises a circular patch layer, a metal ground layer etched with an I-shaped gap, two microstrip line layers with different lengths, a metal bottom plate layer and the like. According to the invention, the dynamic phase and the rotation phase are combined, the left-handed phase and the right-handed phase are independently regulated and controlled at the K wave band and the Ka wave band at the same time, and the final dual-frequency broadband characteristic of the reflective array antenna is ensured by adopting the forms of cross-shaped slot processing, microstrip line slot coupling patches and the like; and the antenna has the advantages of low profile, easy processing, 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 for wireless communication systems, and in particular relates to a broadband dual-frequency dual-circular polarization reflection array antenna with independently controllable beams. Background technique [0002] At present, the normal work of space probes usually depends on satellite communication, and the commonly used satellite communication frequency bands include C, K and Ka bands. Both K-band and Ka-band refer to a specific radio frequency range. K-band refers to radio waves with a frequency in the range of 18-26.5GHz, and Ka-band refers to radio waves with a frequency in the range of 26.5-40GHz. In order to achieve long-distance and stable communication requirements, it is usually necessary to use high-gain circularly polarized antennas at both the transmitting end and the receiving end of the communication, such as phased array antennas, reflector antennas, etc. [0003] The phased array...

AI Technical Summary

Problems solved by technology

The existing dual-frequency dual circularly polarized reflectarray antennas are divided into two categories, one is based on multi-functional layers, the upper layer is a dual-frequency line circular polarization converter, and the lower layer is a dual-frequency linearly polarized reflectarray antenna. The disadvantage is that there are many functional layers, complex structure, high profile, and narrow bandwidth; the other type is based on circuit implementation, and an orthogonal coupler is loaded under the dual-frequency radiator with a common aperture to realize dual-frequency dual circularly polarized reflective arrays. Antenna, its disadvantage is that the bandwidth is narrow and the frequency of dual frequency is relatively small

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