双极化方形微带天线的阻抗特性

在方形微带贴片的相邻两边电可以辐射双极化波。文中结合平面电路技术，腔模理论，用Ｇｒｅｅｎ函数法导出了双边馈电方形微带天线输入阻抗与互阻抗的计算公式，分析了Ｘ波段双极化方形贴片天线输入阻抗，Ｓ参数和电压驻波比在谐振频率附近的变化情况，以及馈电点位置与宽度和εｒ对这些特性参数的影响。文中的计算方法可靠而简捷，可用于此类天线的设计，这种天线容易形成阵列结构，并易于有源集成。

Impedance characteristics of dual-polarized square patch antenna

A square patch antenna fed at two orthogonal edges can radiate dual polarized waves. The input and mutual impedance formulas of a dual polarized square patch element are derived based on the cavity model and planar circuit theory by using the Green function method. The frequency characteristics of impedance, S parameters and VSWR of the antenna are investigated. The affects of the width and location of feedlines and the dielectric constant of substrate on these parameters are also analyzed. These formulas are short cut and effective for engineering designs. This kind of elements is easy to be expended to their arrays and integrated applications.