Broadband full-angle low-sidelobe beam scanning antenna fed by artificial surface plasmons
CN116960620BActive Publication Date: 2026-10-27SHANGHAI UNIV
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Patent Information
- Application Number
- CN202311021348.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-15
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2043-08-15
AI Technical Summary
Technical Problem
但是天线的扫描波束对应角度往往以边射方向为中心，无法扫描到端射方向，产生了扫描盲区，因而无法实现全角度扫描，在大角度扫描时波束的旁瓣水平也会随之提高
Benefits of technology
[0038]本发明提供了一种人工表面等离激元馈电的宽带全角度低旁瓣波束扫描天线，在金属地的上表面敷有介质板，该介质板上敷有表面等离激元馈电线和卵圆形贴片辐射层。金属地、介质板、表面等离激元馈电线组成馈电结构，在不同频段分别对卵圆形贴片辐射层对跖Vivaldi辐射器结构馈电；所述介质板、表面等离激元馈电线和卵圆形贴片辐射层组成的耦合馈电结构能够扩展频扫天线的扫描范围。所述介质板、表面等离激元馈电线和对跖Vivaldi辐射器能够辐射至端射方向，覆盖到频扫天线的扫描盲区，总体波束扫描角度范围能够达到全角度。所述金属贴片辐射层构成锥形衰减常数分布，能够降低在频扫模式下天线的旁瓣水平。本发明所提供的人工表面等离激元馈电的宽带全角度低旁瓣波束扫描天线能够实现4-12GHz宽带(相对带宽100％)内全角度(180°)的扫描范围，最大旁瓣水平不超过-10dB。能够实现在宽带范围内进行全角度范围波束扫描的同时具有低旁瓣特性，为低、慢、小目标雷达探测系统提供了支持。
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Abstract
The application discloses a wideband full-angle low-sidelobe beam scanning antenna fed by artificial surface plasmons and relates to the technical field of electromagnetic wave detection.The wideband full-angle low-sidelobe beam scanning antenna fed by artificial surface plasmons comprises a dielectric plate, a surface plasmon feeding line arranged on the upper surface of the dielectric plate, a patch radiation layer arranged on the upper surface of the dielectric plate and located on the two sides of the surface plasmon feeding line, a metal ground structure arranged on the lower surface of the dielectric plate, a first metal radiation structure arranged on the upper surface of the dielectric plate and connected with one end of the surface plasmon feeding line and a second metal radiation structure arranged on the lower surface of the dielectric plate.The above scheme in the application can realize full-angle range beam scanning in a wideband range while having a low-sidelobe characteristic, thereby providing support for a low, slow and small target radar detection system.
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