| 摘要: |
| 多极化天线能够有效利用电磁波的空间维度，使无线通信或雷达系统容量得到很大提高。从对角馈电的基片集成波导腔体的场分布出发，分析其传输模式。通过在腔体表面设置正交缝隙，可以实现两种相互垂直的极化方式。在分析正交矩形缝隙和领结形缝隙的尺寸对天线性能影响的基础上，获取了TE120模谐振频率的经验计算公式，从而设计了两种双极化天线并比较了两者的工作性能。测试和分析结果表明，双极化领结形缝隙天线具有更大的带宽和更小的缝隙尺寸，测试的工作带宽为200 MHz，天线增益为5.2 dBi，具有广阔的应用前景。 |
| 关键词: 缝隙天线 单腔体双极化 基片集成波导（SIW） 对角馈电 领结形缝隙 |
| 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(2019CFB382) |
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| A diagonally-fed SIW single cavity dual polarization antenna based on bowtie-shaped slot |
| ZOU Xiong,HE Huan,QIAN Huan,AI Pan |
| (Air Force Early Warning Academy,Wuhan 430019,China) |
| Abstract: |
| Multi-polarization antennas can utilize the spatial dimension of electromagnetic wave effectively,which greatly improves the capacity of wireless communication or radar system.From the field distribution of a substrate integrated waveguide(SIW) cavity fed diagonally,the transmission mode is analyzed.Two perpendicular polarization types can be realized by setting orthogonal slots on the upper plate of the cavity.According to the analysis of antenna performance,which is influenced by the size of orthogonal rectangular slot or bowtie-shaped slot,an empirical formula of TE120 mode resonant frequency is obtained,and two types of dual polarization antenna are designed and their performance is compared.The test and analysis results show that the dual polarization antenna based on bowtie-shaped slot has a larger bandwidth and smaller slot size.The measurement shows that it has bandwidth of 200 MHz and gain of 5.2 dBi,which reflects a wide application prospect. |
| Key words: slot antenna single cavity dual polarization substrate integrated waveguide(SIW) diagonally-fed bowtie-shaped slot |
