基于FSS的紧凑型微基站天线

Compact micro-base station antenna based on FSS

设计了一款1×2双极化微基站天线来解决传统宏基站在信道补盲和信道容量提升上遇到的瓶颈。该双极化微基站天线单元通过采用叠层技术和角馈技术,并结合加载短路金属铜柱的方法来提高单元端口间的隔离度;此外,通过在天线单元间加载由频率选择性表面(frequency selective surface,FSS)构成的隔离墙结构以减小双极化天线单元间的耦合。仿真测试结果表明,该1×2双极化微基站天线各单元在工作频段2.5~2.7 GHz内驻波比小于1.5,端口间隔离度大于30 d B,且具有稳定的方向性。在微基站有限的空间内所设计的双极化微基站天线,具有结构紧凑和隔离度高的特性,且天线单元间相互独立工作。

A 1×2 dual-polarized micro base station antenna is presented in this paper.Compared with traditional macro-base station antenna,the proposed antenna is a good candidate for improving the problem of channel blind and low capacity.The laminate technology,angle feed and short circuit metal pillars are utilized to realize high isolation between each port.A frequency selective surface(FSS)wall is further introduced to reduce the coupling of the proposed dual polarized antennas.The simulation and test results show that the VSWR of antenna element is less than 1.5,the isolation between ports is more than 30 dB and a stable radiation pattern can be obtained from 2.5 to 2.7 GHz.Furthermore,due to the compact structure,the proposed antenna has advantage in the size of the micro base station.