CAJ | 학술논문

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.
설계료일개공작재18~40 GHz적쌍겁화근장측시계통탐두.탐두채용사척나팔형식,위개선척나팔교차겁화특성,제출료재량척궤전간가격판적형식,사기재교관적빈대내구유교저적교차겁화.측시결과표명:해탐두재18~40 GHz빈대내재주복사방향상교차겁화저우-40 dB,차방향도구유량호적대칭성.해탐두구유구면소、교차겁화저、빈대관、궤전간단적우점,괄용우근장측시계통중사용.통과모형설계、가공、실측험증료해방법적정학성급유효성,차방법가이용우관빈대근장측시계통중.
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 radiation part. A method of adding an isolated plane between the feeding ridges is applied to realize the low cross-polarization property of the feed in the wide frequency 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 radiation pattern is symmetrical. This feed has the properties of small size,low cross-polarization,wide bandwidth,and simple feeding characters. The validity and the efficiency are approved by the simulation,manufacture,and measurement. The proposed method can be applied for wide-band near-field measurement system.