In this paper the theory of Characteristic Modes is introduced. The modes currents are orthogonal. They provide a physical interpretation of the radiation phenomena taking place on the antenna. This paper illustrates the Characteristic current distribution of different shape patch antennas to find a general rule.% 文章简单介绍了特征模式方法,该方法为任意形状的电磁物体定义了一系列正交的特征电流。这些特征电流是该电磁物体本身的固有属性,因此可以从本质上解释其辐射特性。文章利用特征模式方法提取不同形式贴片天线的主要特征电流,通过对比研究得到不同形状贴片天线上特征电流的一般性规律。
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