| 摘要: |
| 设计了一个工作在18～40 GHz的双极化近场测试系统探头。探头采用四脊喇叭形式
，为改善脊喇叭交叉极化特性，提出了在两脊馈电间加隔板的形式，使其在较宽的频带内具
有较低的交叉极化。测试结果表明：该探头在18～40 GHz频带内在主辐射方向上交叉极
化低于-40 dB，且方向图具有良好的对称性。该探头具有口面小、交叉极化低、频带宽
、馈电简单的优点，适用于近场测试系统中使用。通过模型设计、加工、实测验证了该方法
的正确性及有效性，此方法可以用于宽频带近场测试系统中。 |
| 关键词: 宽带 近场测试 低交叉极化 四脊喇叭 探头 |
| DOI： |
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| 基金项目: |
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| Design of a novel wide-band dual-polarized feed for near-field measurement system |
| YU Hui-juan,YANG Shun-ping,HE Hai-da |
| () |
| Abstract: |
| A novel dual-polarized feed operating in 18～40 GHz for near-field
measurement system is proposed. The quadruple-ridge horn is designed as the radia
tion part. A method of adding an isolated plane between the feeding ridges is ap
plied to realize the low cross-polarization property of the feed in the wide fr
equency band. The measurement data shows that the cross-polarization is below
-40 dB in the direction of the main radiation in the frequency band, and the r
adiation pattern is symmetrical. This feed has the properties of small size, low cross
-polarization, wide bandwidth,and simple feeding characters. The validity and t
he efficiency are approved by the simulation, manufacture, and measurement. The proposed
method can be applied for wide-band near-field measurement system. |
| Key words: wide-band near-field measurement low cross-polarization quadruple-ridge feed |
