高隔离度宽带双极化微带天线设计

双极化天线由于具有极化分离的优异性能,在无线通信系统中引起了广泛关注,因此本文设计了一个高隔离度宽带双极化微带缝隙天线.为了获得高隔离度特性,该天线采用两个不同结构的微带线馈电,分别激励起垂直极化和水平极化模式.同时在地板上开缝隙来展宽天线带宽和实现天线的小型化.仿真优化结果表明,该天线端口1和端口2的阻抗带宽分别为51%和62%,在1.71GHz~2.69GHz整个工作频带范围内两端口之间的隔离度高于40dB,且结构简单,适用于移动通信的实际应用中.

Design of Wideband Dual-Polarized Microstrip Antenna with High Isolation

Dual-polarized antennas have aroused much attention in wireless communication systems due to the excel-lent performance of polarization diversity.Therefore,a broadband dual-polarized microstrip slot antenna with high port isola-tion is proposed.Two feeder lines of different structures are employed to excite the horizontal and vertical polarization modes and obtain high port isolation.Furthermore,the broadband and miniaturization characteristics of the antenna are achieved by etching slots on the ground plane.The simulation results indicate that the bandwidth of port 1 and port 2 are 5 1%and 62%respectively,and the port isolation is higher than 40 dB from 1.71GHz to 2.69GHz.It has a simple structure and is suitable for practical applications of mobile communications.