紧耦合天线的反相耦合相消隔离技术

紧耦合天线的反相耦合相消隔离技术

内容简介：提高紧耦合天线的隔离度是雷达、通信和电子对抗等许多领域中提升系统性能的技术之一,目前的方法大多以牺牲天线辐射效率为代价。研究了一种基于反相耦合相消理念的去耦方法,可以在极小间距情况下实现天线单元之间的高隔离度,并且保持较高的天线增益。利用一种微带双天线结构来验证这一方法,这种结构的两个天线都工作于1.8 GHz,相互间的间隔为10 mm（1/16波长）,仿真和实验结果说明,两个天线间的隔离可以低于-20 dB。经仿真结果显示该结构中的天线增益要大于0 dB,与不经隔离设计时的同结构同尺寸天线差别约1 dB。初步实现了在较小地影响辐射性能的前提下实现紧耦合天线之间的高隔离目标。

Abstract：Decoupling of high coupled antennas is one of the bottlenecks in fields such as radar,commu-nication and electronic warfare.However,the cost of sacrificing antenna radiation performance is una-voidable when the coupling is reduced by existing decoupling technologies.An isolation method of high coupled antennas by adding a reverse phase coupling arm is proposed,which achieve high isolation with little influence of radiation efficiency even under the situation of very close distance between antennas.An example will be given to illustrate this principle,in which antennas work at a frequency of 1.8 GHz and with a distance of 10 mm（1 /16 wavelength）.As shown by simulation and experiment results,isola-tion between antennas of this architecture is less than 20 dB while the gain of each single antenna is kept over 0 dB,so that the proposed method is preliminarily validated.

作者：陈念, 耿军平, 叶声, 梁仙灵, 金荣洪,

关键词：隔离, 紧耦合天线, 反相相消,