| 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 dB，副瓣电平带宽(SLL≤-19 dB)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 dBi的高增益特性。 |
| 关键词: 缝隙阵列 宽带特性 低副瓣 脊波导 高增益 |
| DOI： |
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| 基金项目: |
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| Design of a slotted ridge waveguide antenna array with broadband characteristic of impedance and low sidelobe |
| LI Jia-mei,GUAN ZHeng-tao |
| () |
| Abstract: |
| An 8×16 slotted ridge waveguide antenna array is presented.The linear array is separated into two sub-arrays.The antenna is fed by a waveguide divider,which is combined by a coaxial connector and two coupling slots.All the radiation slots are distributed in Taylor pattern.The antenna array is optimized according 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 the antenna possesses broadband characteristic of impedance as well as low sidelobe compared with those presented in existing literatures.Besides,the gains are higher than 16 dBi within its operating frequency. |
| Key words: slot array broadband characteristic low sidelobe ridge waveguide high gain |
