基于腔模理论讨论矩形微带天线远区场  

Discussion about Rectangular Microstrip Antennas Far Field Based on Cavity Model Theory

作　　者：伍刚[1] 张小平[1] 

机构地区：[1]攀枝花学院,四川攀枝花617000

出　　处：《现代电子技术》2006年第15期46-48,51,共4页Modern Electronics Technique

摘　　要：微带天线具有剖面薄、体积小、重量轻、平面结构等特点,他可以形成与导弹、卫星等载体表面共形的结构,能与有源器件和电路集成单一的模件,便于获得圆极化波,实现双频段、双极化等功能。微带天线是由导体薄片粘贴在背面有导体接地的介质基片上形成的天线,利用腔模理论对矩形微带天线远区场求解时,将微带天线看作是一个矩形谐振腔,列出腔内波动方程,求出内场,利用Jm=n×eEz公式求出磁流,再利用矢量电位求出远区场和方向函数表达式。The microstrip antennas has characteristics of the section plane thinly, the volume small, the weight light, the planar structure and so on. It may form structure of surface altogether shape with the missile, satellite and so on carrier, integrate sole module with the active device and the electric circuit,it obtains the circularly - polarized wave,realizes function of the double - polarized and the double - frequency. The microstrip antenna is one glued by the thin slice of conductor to the medium substrate forms with the conductor to earth on the back. When cavity model theory is used to find the rectangular microstrip antennas far zone field, we can regard the microstrip antennas as rectangular resonant cavity,list the wave equation in the cavity, extract the infield,and the magnetic current using the formula →Jm= →n×→eEx ,and extract as well the far field and the directivity function expression using the vector electric potential.

关 键 词：微带天线 腔模理论 波动方程 远区场 方向函数 

分 类 号：TN820[电子电信—信息与通信工程]