无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2011年
10期
40-43
,共4页
测向天线阵%互耦效应%矩量法%互阻抗
測嚮天線陣%互耦效應%矩量法%互阻抗
측향천선진%호우효응%구량법%호조항
direction finding antenna arrays%mutual coupling effMect%MoM%mutual impedance
天线阵元间的互耦效应将导致天线阵列的电参数和方向性的改变,从而影响测向系统的性能。针对天线阵列各单元之间的互耦现象,提出了利用矩量法精确分析天线阵列各单元上的电流分布,进一步通过互阻抗网络计算法求出测向天线单元的实际激励电压的幅度和相位,进而得到天线的辐射和接收特性。对实际的均匀直线阵列超分辨测向系统中的互耦效应进行了分析,给出了仿真结果,验证了互耦效应对测向性能的影响。
天線陣元間的互耦效應將導緻天線陣列的電參數和方嚮性的改變,從而影響測嚮繫統的性能。針對天線陣列各單元之間的互耦現象,提齣瞭利用矩量法精確分析天線陣列各單元上的電流分佈,進一步通過互阻抗網絡計算法求齣測嚮天線單元的實際激勵電壓的幅度和相位,進而得到天線的輻射和接收特性。對實際的均勻直線陣列超分辨測嚮繫統中的互耦效應進行瞭分析,給齣瞭倣真結果,驗證瞭互耦效應對測嚮性能的影響。
천선진원간적호우효응장도치천선진렬적전삼수화방향성적개변,종이영향측향계통적성능。침대천선진렬각단원지간적호우현상,제출료이용구량법정학분석천선진렬각단원상적전류분포,진일보통과호조항망락계산법구출측향천선단원적실제격려전압적폭도화상위,진이득도천선적복사화접수특성。대실제적균균직선진렬초분변측향계통중적호우효응진행료분석,급출료방진결과,험증료호우효응대측향성능적영향。
Mutual coupling effect between antenna elements would change their electric parameters and direction characteristic.In this paper,the method of moment（MoM） technique is used to analyze the actual current distribution in array elements precisely.Then,using mutual impedance network,we can obtain the practical amplitude and phase of the excited voltage in array elements.Consequently,the radiation characteristic of the elements can be analyzed precisely.And the accuracy and resolution of direction finding system would be improved by correcting the direction finding algorithm with the analysis results.Finally,the simulation results with MATLAB are provided to demonstrate mutual coupling effectiveness.
