角馈方形微带天线的输入阻抗与散射参数

Input Impedance and S-Parameters of Corner-fed Square Microstrip Antenna

本文基于 Green函数法导出了双馈点角馈及边馈方形贴片天线输入阻抗与互阻抗的计算公式 .分析了阻抗和散射参数在谐振频率附近的变化情况 ,以及馈电点宽度对这些特性参数的影响 .结果表明角馈贴片具有较低的互耦系数 ,这对天线的双极化工作是很有意义的 .本文的计算方法简捷有效 ,理论分析结果可用于此类双极化天线的设计 .

Based on the Green function approach, new expressions for the input impedance and S parameters of patch antennas corner fed by single and double microstrip feeders are obtained. The input impedance and mutual coupling characteristic are analyzed and compared with those of side fed patches. It is shown that the mutual coupling factor of a corner fed patch is much smaller than that of a side fed antenna. The results are useful for the design of dual polarization anten nas.