Broadband circularly polarized antenna based on feature mode analysis
The low-profile broadband circularly polarized antenna with a non-periodic hexagonal metasurface and feature mode analysis addresses size and bandwidth limitations, offering a simpler feeding structure and broader applications in wireless communication.
JP7886072B2Active Publication Date: 2026-07-07NANJING UNIV OF POSTS & TELECOMM
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Patent Information
- Application Number
- JP2025534512
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2024-04-25
- Filing Date
- 2024-12-03
- Publication Date
- 2026-07-07
- Estimated Expiration
- 2044-12-03
AI Technical Summary
Technical Problem
Existing circularly polarized antennas are large, lack flexibility, have narrow axial ratio bandwidth, and complex feeding structures, making them unsuitable for integration and increasing design complexity and cost.
Method used
A low-profile broadband circularly polarized antenna design using a non-periodic regular hexagonal metasurface with feature mode analysis, featuring a simple feeding structure and adjustable hexagonal ring widths to control mode characteristics and current distribution, enhancing coupling between patches and reducing higher-order mode influence.
Benefits of technology
The design achieves a wider axial ratio bandwidth, smaller size, and simpler feeding method, reducing manufacturing costs and expanding applications in wireless communication systems.
✦ Generated by Eureka AI based on patent content.
Abstract
This invention discloses a wideband circularly polarized antenna based on characteristic mode analysis. The top surface of this antenna is a metasurface structure with aperiodic regular hexagonal rings. The regular hexagonal structure can be arranged in three directions, resulting in a stronger coupling effect and a reduced antenna profile. By adjusting the size of the regular hexagonal rings in each layer, it is possible to control the mode salience and current distribution throughout the metasurface and find the appropriate mode. After the overall dimensions of the metasurface are determined, the appropriate feed position is found based on the current distribution obtained through characteristic mode analysis. This antenna is fed using an L-shaped slot coupled feed method. This invention applies characteristic mode analysis to aperiodic regular hexagonal ring metasurface structures. The regular hexagonal structure strengthens inter-unit coupling and reduces the antenna profile. The aperiodicity allows for control of the modes in the metasurface structure, allowing for optimal mode finding, thereby simplifying the metasurface design process.
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