宽频带双层微带天线研究  

Analysis of Broad-Band Dual-Layer Microstrip Antenna

作　　者：董玉良[1] 田步宁[1] 纪奕才[1] 

机构地区：[1]西安电子科技大学天线与电磁散射研究所,西安710071

出　　处：《微波学报》2002年第1期43-45,共3页Journal of Microwaves

摘　　要：本文提出了一种用于计算双层微带天线输入阻抗的新方法，文中引入了互电容及电容耦合系数概念，把天线输入阻抗等效为耦合谐振电路，其单元集总参数可用模展开方法求得；给出了馈电探针的电容补偿公式，使天线阻抗带宽达25％（VSWR《2．0）。本文分析方法简单有效，可推广应用于其它形式的双层或多层微带天线的分析。Abstract: A new method for computing the input impedance of a dual-layer microstrip antenna is presented.By introducing the mutual capacitance and capacitance-coupling coefficient, the input impedance of the antenna isequivalent to a coupling resonant circuit. The lumped parameters of the resonant circuit can be obtained by using themode expansion approach. A capacitance compensation formula is also given. Then, the input impedance bandwidth ofthe antenna is up to 25 % for a VSWR≤2. 0. The present method has advantages of simplicity and validity and can heeasily used to analyze other types of dual-layer or multi-layer microstrip antennas.

关 键 词：贴片天线 宽带天线 模式展开法 互耦 

分 类 号：TN82[电子电信—信息与通信工程]