Dual circularly polarized filtering reflectarray unit, antenna and implementation method thereof

By designing a dual-circularly polarized filter reflector array unit and utilizing a multilayer dielectric substrate and conductor structure, the phases of right-hand and left-hand circularly polarized reflected waves can be independently controlled, achieving independent beam control and out-of-band suppression for the dual-circularly polarized filter reflector array antenna. This solves the problem of single polarization form in existing technologies and is suitable for B5G/6G millimeter-wave communication systems.

CN121602059BActive Publication Date: 2026-06-12SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Filing Date
2026-01-28
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing high-gain filtered reflective or transmissive array antennas are mostly single-line polarized, dual-line polarized, or single circular polarized, failing to simultaneously support left-hand circular polarization and right-hand circular polarization, and lacking independent beam control capabilities and integrated filtering characteristics, thus limiting their application in polarization diversity or full-duplex communication.

Method used

A dual-circular polarization filter reflector array unit was designed. Through a multilayer dielectric substrate and a multilayer conductor structure, including a radiation structure, a parasitic resonance structure, and a hybrid coupler, the phases of the right-hand circularly polarized and left-hand circularly polarized reflected waves are independently controlled by the first and second phase delay lines to form upper and lower radiation nulls to achieve out-of-band suppression. The radiation nulls are moved by adjusting the position and gap of the radiation patch and the closed metal ring. Combined with a planar dual-circular polarization filter feed, dual-beam independent control is achieved.

Benefits of technology

It achieves independent directional passband high-efficiency radiation of right-hand circularly polarized and left-hand circularly polarized beams, significant out-of-band suppression, reduced system insertion loss, improved system integration, adaptability to amplitude and phase stability of non-equivalent illumination units, and features high integration and low profile design, making it suitable for B5G/6G millimeter-wave communication systems.

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Abstract

The application provides a dual circularly polarized filtering reflective array unit, comprising a multilayer dielectric substrate and a multilayer conductor structure arranged thereon, the multilayer conductor structure comprising: a radiation structure comprising an upper radiation patch and a lower radiation patch; a parasitic resonance structure comprising a closed metal ring arranged around the radiation structure; a hybrid coupler, and a first phase delay line and a second phase delay line connected to two ports of the hybrid coupler respectively; wherein the radiation structure and the parasitic resonance structure cooperate to form a radiation zero point on the upper side and the lower side of the passband of the unit reflection coefficient, realizing out-of-band suppression; the first phase delay line is used for independently regulating the phase of the right-handed circularly polarized reflected wave, and the second phase delay line is used for independently regulating the phase of the left-handed circularly polarized reflected wave.
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