全等效电流积分方程法分析微带天线

Entire Equivalence Current Integral Equation Approach for the Analysis of Microstrip Antennas

提出了一种分析微带天线的新方法———全等效电流积分方程法。根据等效原理 ,用等效表面电流表示金属导体影响 ,用等效体极化电流来取代介质结构影响 ,建立全等效电流积分方程 ,结合空域矩量法来求解整个微带结构的电流分布。采用该方法可以分析任意结构的微带天线 ,只需用最简单的自由空间格林函数而无须求解复杂的谱域或空域格林函数 ,避免了无穷积分或Sommerfeld积分 ,且在分析中精确考虑了有限尺寸金属接地板的影响。用该方法分析了矩形微带天线 ,计算结果与其它文献给出的结果一致 ,证实了该方法的有效性。

A new approach-entire equivalence current integral equation is developed for the analysis of microstrip antennas. The equivalence principle is used to describe the effects of all conducting bodies by equivalent surface electric currents and all dielectrics by equivalent volume polarization currents, which we call entire equivalence electric current integral equations (E 3CIE). Moment methods (MM) are utilized to solve the electric current on the entire structure. Any kind of microstrip antennas can be analysed using this approach, and the effects of the finite size ground plate is considered in analysing. The salience of this approach is that free space Green's function is used instead of spectral or spatial Green's function, avoiding the difficulties of infinite spectral integral or Sommerfeld integral. Finally, typical results of rectangular microstrip antenna are presented and compared with other's, validating this approach.