摘要
本文设计了一种K频段低副瓣波导缝隙驻波阵天线,给出了实现低副瓣的方法。设计副瓣电平为-27d B,缝隙幅度分布按-30d B泰勒分布计算,结合高频仿真软件Ansoft HFSS对各缝隙归一化导纳进行计算,建立仿真模型并优化天线各参数。依据设计结果加工实物并测试其方向图及增益。测试结果表明,该天线在工作频带内波束宽度约3°,副瓣电平小于-27d B,工作频带内增益大于30.8d B,仿真结果与实测结果相符,设计满足指标要求。
In this paper, a K-band standing wave array waveguide slot antenna with a low sidelobe is designed, and the method of realizing low sidelobe is presented. The design sidelobe level is-27 d B, and the slot amplitude distribution is calculated according to-30 d B Taylor distribution. Using high frequency simulation software Ansoft HFSS, the normalized admittance of each slot is calculated, the simulation model is established and the antenna parameters are optimized. According to the results of the design, processing object and test the pattern and the gain, and the test results show that the antenna beam width about 3° within the working frequency band, the sidelobe level is less than 27 d B, the working frequency band gain greater than 30.8 d B, the simulation results are in conformity with the measured results, the design satisfies the requirement of indicators.
出处
《现代导航》
2018年第4期287-290,共4页
Modern Navigation
关键词
K频段
低副瓣
波导缝隙
驻波阵
K-braid
Low Sidelobe
Waveguide Slot
Standing Wave Array
