| 摘要: |
| 为克服传统漏波天线存在的开阻带缺点，提出了斜45°“目”字形缝隙结构，分析了该结构的色散特性和辐射特性，进而设计了具有波束从后向到前向连续扫描功能的漏波天线。同时，提出了四极化形成方案，利用 3 dB 耦合器作为圆极化馈电网络，再引入90°移相器后形成线极化馈电网络。将两条“目”字形缝隙线阵与馈电网络相结合来实现四极化漏波天线。测试结果表明，该四极化天线具有较好的端口隔离度，线极化的波束扫描范围是-25°~21°，圆极化的波束扫描范围是-21°~31°。 |
| 关键词: 基片集成波导(SIW) 四极化 漏波天线 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（62101592）；湖北省自然科学基金计划项目（ZRMS2019001752） |
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| A substrate integrated waveguide quadri-polarized leaky-wave antenna based on eye-shaped slot structure |
| ZOU Xiong,YANG Huabing,FAN Ya,LI Jing |
| (Air Force Early Warning Academy) |
| Abstract: |
| In order to overcome the open stopband shortcomings of traditional leaky wave antenna,an oblique 45° eye shaped slot structure is proposed.The dispersion and radiation characteristics of the structure are analyzed,and then a leaky wave antenna with a function of continuous beam scanning from back to front is designed.At the same time,a quadri polarization forming scheme is proposed.A 3 dB coupler is used as the circular polarization feed network,and then a 90 ° phase shifter is introduced to form the linear polarization feed network.The quadri polarized leaky wave antenna is realized by combining two eye shaped slot linear arrays with the feed network.The test results show that the quadri polarized antenna has good port isolation.The beam scanning range of linear polarization and circular polarization is -25°~21°and -21°~31°，respectively. |
| Key words: substrate integrated waveguide(SIW) quadri polarization leaky wave antenna |
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