摘要
针对放置极近的微带天线阵元之间耦合的问题,提出一种改进方法,即通过在贴片附近增加两条微带线将相邻边的间距仅0.048λ0(λ0是自由波长)的阵元之间的隔离度(|S21|)从7.5dB提高到21.5dB以上。与同尺寸的普通微带天线阵相比,该方法较大程度地改善了阵元的方向性,降低了副瓣电平。为了获得最大的隔离度,优化了微带线的长度、宽度以及贴片与微带线间耦合缝隙的大小。
An efficient mutual coupling reduction method is introduced for very closely placed dual- element microstrip antennas. Through two simple microstrip lines on the ground plane, more than 21dB isolation is achieved with edge-to-edge distance of less than 0. 048λ0（λ0 is free space wave- length）. The width and length of microstrip lines as well as the coupling slot between the patch and microstrip lines have been optimized for maximizing the isolation.
出处
《信息工程大学学报》
2013年第1期54-57,共4页
Journal of Information Engineering University
关键词
微带天线阵
耦合减弱
微带线
patch antenna array
mutual coupling reduction
microstrip lines
