A slot-based self-decoupling patch antenna

By embedding rectangular slots into rectangular metal patches and adjusting the feed point position, the mutual coupling problem of patch antenna arrays under conventional spacing arrangement was solved, achieving self-decoupling and wide bandwidth matching, thus improving the radiation performance of the array.

CN121261111BActive Publication Date: 2026-07-17NANTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANTONG UNIV
Filing Date
2025-09-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing patch antenna arrays suffer from severe mutual coupling when arranged at conventional spacing, resulting in radiation pattern distortion and poor matching. Furthermore, their decoupling bandwidth is narrow, limiting their application potential.

Method used

A rectangular slot is embedded on the vertical axis of symmetry of a rectangular metal patch. By changing the current distribution and expanding the weak electric field region, combined with adjusting the feed point position, self-decoupling is achieved. This method is suitable for conventional spacing array arrangements and expands the matching and decoupling bandwidth.

Benefits of technology

It achieves self-decoupling of conventionally spaced array arrangements, improves matching bandwidth and decoupling effect, expands the degree of freedom of array arrangement, and takes into account a wide matching and decoupling bandwidth.

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Abstract

This invention discloses a slot-based self-decoupling patch antenna, comprising a top metal structure, an upper dielectric substrate, a lower dielectric substrate, a metal ground layer, and a coaxial line. The self-decoupling patch antenna of this invention symmetrically embeds rectangular slots along the vertical axis of symmetry of a rectangular metal patch. It utilizes the change in current distribution caused by the rectangular slots of the excitation unit to construct the oblique current of the coupling unit. Combined with the expansion effect of the rectangular slots of the coupling unit on the weak electric field region, self-decoupling of the patch antenna is achieved. This solves the limitation problem of decoupling spacing in self-decoupling antenna structures, enabling conventional spacing array arrangement and decoupling, while also considering a relatively wide matching and decoupling bandwidth.
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