Compact millimeter wave dual-polarization filtering antenna and array

By designing a compact millimeter-wave dual-polarization filtering antenna with a multi-layer structure and specific layout, the problems of large antenna size, single polarization and difficult integration in existing technologies are solved, high frequency selectivity and polarization isolation are achieved, and the construction of phased array systems for mobile terminal devices is supported.

CN120637896APending Publication Date: 2025-09-12SOUTHEAST UNIV
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Patent Information

Application Number
CN202510940359.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-09
Publication Date
2025-09-12

AI Technical Summary

Technical Problem

Existing millimeter-wave filter antennas have problems such as being large in size, mostly single-polarized, and difficult to integrate with active circuits, making it difficult to meet the miniaturization and high integration requirements of mobile terminal devices.

Method used

A compact millimeter-wave dual-polarization filtering antenna is designed. It adopts a multi-layer structure and a specific metal layer layout, including a cross-shaped radiating patch, a ring-shaped driving patch, an L-shaped feeding probe, etc., combined with a decoupling structure to achieve dual polarization and integration with active circuits.

Benefits of technology

The antenna has achieved miniaturization and compact structure, and has high frequency selectivity and polarization isolation. It can be expanded into an antenna array and combined with active circuits to build a phased array system with excellent out-of-band suppression and beam scanning performance.

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Abstract

The invention discloses a compact millimeter wave dual-polarization filtering antenna and array, which comprises 11 layers of structures (a first metal layer to a sixth metal layer, three dielectric layers and two bonding layers) and three types of metalized via holes which are sequentially stacked from top to bottom, the feed through hole penetrates through the first dielectric layer to the third dielectric layer, the short-circuit through hole penetrates through the first dielectric layer to the third dielectric layer, and the shielding hole penetrates through the third dielectric layer. Wherein a cross-shaped radiation patch and a C-shaped parasitic metal strip line are arranged on the first metal layer; an annular driving patch is arranged on the second metal layer; the third metal layer is provided with a feed metal strip line and a parasitic metal strip line. The fourth metal layer is provided with a parasitic open-circuit branch. A first grounding plane is arranged on the fifth metal layer; the sixth metal layer is provided with a second grounding plane and an anti-pad. The working frequency band covers the n258 frequency band and the n257 frequency band of 5G millimeter waves, dual-polarization radiation and effective out-of-band rejection can be achieved, and meanwhile the antenna has the advantages of being compact in structure and light and handy in appearance.
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