加载测向天线阵列的统一网络模型研究

The Unified Network Model Analysis of the Loaded Antenna Array for Direction Finding

该文首先建立联系天线阵元和加载网络的统一网络模型,把路与场统一于广义矩阵型欧姆定律之中。基于统一网络模型理论,采用矩量法(MoM)分析了加载匹配补偿网络的五元圆形测向天线阵列(FCADF)。研究表明,电路网络的加载,引入了新的路与场相互作用,可有效补偿天线单元之间的互耦影响,改善方向图不圆度特性,并实现阻抗匹配,从而提高了测向精度。此外,测向天线阵列中的局域谐振现象,通过加载网络也被有效抑制。

This paper first presents the unified network model associated antennas with loaded networks, which shows that the loaded circuit networks and the antennas (field networks) are unified by the generalized matrix Ohm's law. Based on the theory of the unified network model, this paper give a rigorous study of the Five-element Circle Array for Direction Finding (FCADF) by using the Method of Moments (MoM). The results show that the interaction between circuits and fields is introduced by loading a matching and compensating network, which compensates the effect of mutual coupling between array elements, realizes impedance matching, and improves the non-circular degree of radiated pattern and the precision of direction finding. In addition, the local resonant phenomenon in FCAFD is effectively restrained by loading the circuit network.