Circularly polarized wide-beam scanning array unit

By simplifying the design of the circularly polarized wide-beam scanning array unit, the problems of insufficient stability and performance of the array antenna are solved, and the efficient combination of wide bandwidth, wide scanning angle and circular polarization is achieved, which is suitable for low-orbit satellite communication ground terminal antennas.

CN121812960APending Publication Date: 2026-04-07SHENYANG UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202610122015.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-29
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

In existing array antenna designs, the complex inter-board structure leads to reduced stability and makes it impossible to simultaneously meet performance requirements such as wide bandwidth, wide scan angle, and circular polarization, thus failing to meet the high-performance requirements of low-Earth orbit satellite communication.

Method used

A circularly polarized wide-beam scanning array unit with a four-layer dielectric substrate, four-layer metal layers and metal pillar structure is used to simplify the structure and improve stability and circular polarization performance by utilizing a hollowed-out dielectric cover layer, a metasurface patch layer and a sequentially rotated coupled feed stripline.

Benefits of technology

This invention achieves a wide bandwidth, large circular polarization scanning angle, simple structure, and low profile array unit, which is suitable for hybrid scanning high-gain satellite communication ground terminal antennas, improving the stability and performance of the unit.

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Abstract

The invention discloses a circularly polarized wide-beam scanning array unit, the bottom layer of the array unit is provided with a second layer of metal floor, the second layer of metal floor is provided with a feed structure and a radiation structure from bottom to top in sequence, and the peripheral surfaces of the feed structure and the radiation structure are coated with isolation structures. A sequentially rotating coupling feed strip line is clamped in the feed structure, a second layer of metasurface patch is adopted in the radiation structure, and a dielectric covering layer is arranged at the upper end of the radiation structure. The array antenna unit has the advantages of wide frequency band, large circular polarization scanning angle, simple structure, low profile and the like, is suitable for a single-side main plane broadband circular polarization large-angle scanning array antenna, and is particularly suitable for a mixed scanning type high-gain satellite communication ground terminal antenna; and the application in the aspects of a re-frequency selective surface, a polarization selective surface, an intelligent metasurface, a backtracking array and the like can be expanded.
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