交叉馈电微带全向天线的时域有限差分法分析.pdfVIP

交叉馈电微带全向天线的时域有限差分法分析 党 涛 1 郑万清 1 陈妹 2 (四川九洲电器集团有限责任公司第一研究所天线室, 四川绵阳 621000)1 (四川九洲电器集团有限责任公司第 一研究所天线室, 四川绵阳 621000)1 (四川九洲电器集团有限责任公司微波技术研究部, 四川绵阳 621000)2 摘 要：提供了在新航行系统中应用的一种新型交叉馈电微带全向接收天线，用三维变换方向隐式时域有限 差分法(ADI-FDTD)进行仿真。给出了改进的 ADI-FDTD 计算公式便于提高计算效率和精度，对新算法的稳 定性、色散关系以及参数的选取进行了研究。然后用这种方法研究了交叉馈电微带全向天线的电压驻波比和 辐射方向图特性，得到一些有参考价值的结论。 关键词：交叉馈电微带全向天线，时域有限差分方法，各向异性系数，数值色散 Analysis of Cross-feed Omni-directional Patch Antenna Using Finite -Difference Time- Domain Algorithm Dang Tao1 Zheng Wanqing1 Chen Mei2 1 (Institute No. 1, Jiuzhou Electric Group Limited Corporation, Sichuan Mianyang 621000 ) 1 (Institute No. 1, Jiuzhou Electric Group Limited Corporation, Sichuan Mianyang 621000 ) 2 (Microwave research Institute , Jiuzhou Electric Group Limited Corporation, Sichuan Mianyang 621000) Abstract: A novel Cross-feed Omni-directional Patch antenna used in new navigation system is presented in this paper. The three-dimensional alternating-direction implicit finite-difference time-domain (ADI-FDTD) method is applied to simulating the complex structure. Modified ADI-FDTD equations have been proposed so that the computational efficiency and precision can be increased. Then the stability, dispersive relation, and selection of additional parameters of the proposed algorithm have been studied. Finally, using the new method, voltage standing wave ratio, and radiation pattern of the patch antenna have been calculated, some characteristics of the antenna are discussed, and significant