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 |