圆环微带天线特征值的一种近似计算公式  

An approximate calculation formula of eigenvalue for ring microstrip antenna

作　　者：商锋[1] 董妮妮[2] 田秀劳[2] 

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121 [2]西安邮电大学理学院,陕西西安710121

出　　处：《西安邮电大学学报》2015年第3期97-99,共3页Journal of Xi’an University of Posts and Telecommunications

摘　　要：在多模卫星系统圆环天线以介质为中心的情形下,利用腔体模型构建特征函数,得出磁壁边界条件下的特征方程,针对方程参数的不同取值,运用Matlab求解相应的特征值。调用Lsqcurvefit函数,通过拟合得出特征值的近似公式。借助Ansoft HFSS软件进行天线设计仿真,所得主模谐振频率与由近似公式所得结果一致,表明所得近似公式可用于简化天线设计。With the ring microstrip antenna in multimode satellite system whose center is media, the characteristic function was constructed using the cavity model. And the characteristic equa- tion under magnetic wall boundary conditions was obtained. With the different values of equation parameters, the corresponding eigenvalue were achieved. According to these values, the approxi- mate calculation formula was given using the Lsqcurvefit function for data fitting in MATLAB. Then the antenna was simulated in Ansoft HFSS, and its simulation result agrees well with the calculation formula under the main mode. The consistency shows the approximate calculation for- mula can be used to simplify the design of the ring microstrip antenna.

关 键 词：圆环天线 公式拟合 谐振频率 

分 类 号：TN82[电子电信—信息与通信工程]