介质复盖对圆形微带天线性能的影响  

THE EFFECT OF A DIELECTIC COVER ON THE CHARACTERISTIC OF CIRCULAR MICROSTRIP ANTENNAS

作　　者：黄景熙[1] 范治波[1] 

机构地区：[1]武汉大学电子信息学学院

出　　处：《武汉大学学报（自然科学版）》1995年第1期119-122,共4页Journal of Wuhan University(Natural Science Edition)

摘　　要：基于汉克尔变换域分析，对具有一层介质复盖的圆形微带天线进行了严格的全波分析．利用伽略金法推导出对于未知电流展开系数的齐次矩阵方程，通过数值解求得谐振频率和电流展开系数及远场辐射方向图．文中给出了无介质复盖与介质复盖层厚度为不同数值时，圆形微带天线谐振频率和辐射方向图的数值结果，并与实验数值吻合得很好．A rigorous full-ware analysis of a circular microstrip antenna with a dielectric cover is described. This method is based open the Hankel transform domain analysis. The homogeneous matrix equation for unknown current expansion coefficients is derived using Galerkin's method. By solving the matrix equation numerically,the rosonant frequencies and current expansion coefficierts are obtained. After obtaining Hankel transforms of currents on the circular disk, the farAlzone radiation patterns are easily calculated. Numencal results for the rosanant frequencies and radiation I)atterns of a circular microstrip antenna with a dielectric cover are shown for various values of dielectric cover thickness. Numerical results for the resonant frequencies of the antenna without a dielectric cover are also shown and in excellent agreement with the available ed7erir-nental data.

关 键 词：微带天线 圆形微带天线 伽略金法 

分 类 号：TN823.15[电子电信—信息与通信工程]