一种去耦多系统基站天线

A Decoupling Multi-System Base Station Antenna

针对基站天线需兼容2G、3G、4G和5G多个系统的需求,提出了一种新的去耦多系统基站天线。天线由低频辐射单元和高频辐射单元肩并肩布局组阵,低频辐射单元为了减小对高频信号的耦合,采用1 mm细臂结构,并且通过细臂本体弯折实现的3.5 GHz带阻滤波。高频辐射单元通过调节环氧板和天线罩之间的间距来减小天线罩对3.5 GHz信号的影响。仿真和实测结果表明,所设计的天线工作带宽覆盖820 MHz~960 MHz,3.4 GHz~3.6 GHz,且波宽、轴向交叉极化、驻波等指标均达到预期。

A new decoupling multi-system base station antenna is proposed to meet the requirement that the base station antenna needs to be compatible with 2G,3G,4G and 5G systems.The antenna consists of a low-frequency radiation unit and a high-frequency radiation unit arranged side by side.In order to reduce the coupling of high-frequency signals,the low-frequency radiation unit adopts a 1 mm thin arm structure,and the 3.5 GHz band-stop filter is realized by bending the thin arm body.The high-frequency radiation unit reduces the influence of the radome on the 3.5 GHz signal by adjusting the spacing between the epoxy board and the radome.The simulation and actual measurement results show that the operating bandwidth of designed antenna covers 820 MHz~960 MHz,3.4 GHz~3.6 GHz,and the indicators such as wave width,axial cross-polarization and standing wave all meet the expectations.