【摘要】 本文采用腔模理论导出了角馈双极化微带贴片天线的方向图表示式 ,并在此基础上分析了该天线的极化特性。结果表明角馈双极化微带贴片天线的两个不同极化并非处处正交 ,但是在有用的主瓣角度范围内 ,两个极化是接近正交的 ;而且采用多端口网络理论计算两馈电端口间的隔离度仍然大于 2 0dB ,因此角馈双极化微带天线能够用于极化分集接收更多还原

【Abstract】 In this paper, the radiation pattern expression of corner fed dual polarization microstrip patch antenna is derived by cavity theory. On the basis of pattern expression, the polarization characteristics of this antenna are analyzed. The analysis reveals that the double polarizations of this antenna are not orthogonal in every direction, although within the mainbeam of the antenna, its polarizations are almost orthogonal. The antenna’s isolation between the fed ports calculated by multiport network theory is greater than 20dB, so this kind of antenna can be applied to diversity receiving.更多还原