摘要
设计了一种16×8脊波导缝隙阵列天线,线阵阵面分成两个子阵,馈电采用同轴馈电与耦合缝隙馈电结合的两级馈电方式,辐射缝隙分布为泰勒分布。天线设计采用近场诊断方法和阻抗过载技术进行优化。天线实物加工测试结果表明,天线在X频段驻波带宽(VSWR≤1.5)为7.3%,最低副瓣达到-25.8 d B,副瓣电平带宽(SLL≤-19 d B)为6.2%。与已有文献相比,该天线同时具备阻抗宽带特性和低副瓣宽带特性,工作频带内具有增益均大于16 d Bi的高增益特性。
An 8×16 slotted ridge waveguide antenna array is presented. The linear array is separated intotwo sub-arrays. The antenna is fed by a waveguide divider,which is combined by a coaxial connector andtwo coupling slots. All the radiation slots are distributed in Taylor pattern. The antenna array is optimizedaccording to the near-field on slots aperture and impedance overload technology. The antenna entity is fabricated and measured. Measured results show that impedance bandwidth is 7. 3%（VSWR≤1. 5）,and sidelobe bandwidth（SLL≤-19 dB） is 6. 2%,sidelobe is less than -25. 8 dB. The conclusion is drawn that theantenna possesses broadband characteristic of impedance as well as low sidelobe compared with those pres-ented in existing literatures. Besides,the gains are higher than 16 dBi within its operating frequency.
出处
《电讯技术》
北大核心
2014年第12期1674-1677,共4页
Telecommunication Engineering
关键词
缝隙阵列
宽带特性
低副瓣
脊波导
高增益
slot array
broadband characteristic
low sidelobe
ridge waveguide
high gain
