单轴各向异性背腔式微带贴片天线的表面缝隙场分布及交叉极化方向图分析  

Analysis of Near-Field Distribution and Cross-Polarization Radiation Pattern Cavity-Backed Microstrip Patch Antenna on a Uniaxial substrate

作　　者：班永灵[1] 周乐柱[1] 于哲峰[1] 王湃[1] 

机构地区：[1]北京大学信息科学技术学院电子学系,北京100871

出　　处：《北京大学学报（自然科学版）》2004年第3期498-504,共7页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然科学基金 (60 0 710 167);教育部博士点基金 (2 0 0 10 0 0 10 3 7)资助项目

摘　　要：为了研究单轴介质基片的各向异性性质对微带贴片天线辐射特性的影响 ,采用矢量有限元 边界积分法 (Edge BasedFEM BI)对填充单轴各向异性介质的背腔式微带贴片天线表面缝隙部分的切向电场分布及交叉极化方向图进行了计算及分析。计算结果表明仅当单轴介质的光轴沿贴片的法向方向 (z轴 )时 ,填充不同的单轴介质才会影响微带天线的场分布及最大交叉极化电平值 ,而当光轴沿x轴、y轴时 。For the study of effects of uniaxial anisotropy in the substrate on radiation property of cavity-backed microstrip patch antenna, the hybrid method of Edge-Based finite element (Edge-Based FEM) and boundary integral (BI) is adopted to solve the tangential electric field distribution on the surface and the cross polarization radiation pattern. The computing results show that the field distribution and cross polarization pattern of microstrip antenna with different uniaxial substrate are affected only when the optic axis is along z coordinate. When the optic axis is along x, y coordinate, the effects are neglected.

关 键 词：单轴各向异性 背腔 微带贴片天线 方向图 有限元 

分 类 号：TN8224[电子电信—信息与通信工程]