双极化双频段微带天线设计

Design of Dual-polarization and Dual-band Microstrip Antenna

设计了一款双极化双频段的微带天线。天线采用双馈电结构可实现双极化特性,采用方环形的腔体的设计,可以实现双频段特性,最底层的馈电网络采用二级Wilkinson宽带功分器,展宽了天线工作频段的带宽,每个频段内带宽达到1.1GHz。由仿真和测试结果表明,天线阻抗带宽为:3.5GHz-4.6GHz、5.5GHz-7GHz,在该频段内天线具有双极化特性。该天线可以用于超宽带定位基站,发射标签可以任意放置。

A dual polarized dual frequency band microstrip antenna is designed.The antenna adopts double feed structure can achieve the dual polarization characteristics,the design of the ring cavity side,can achieve dual band characteristics,the bottom of the feed network using two Wilkinson broadband power divider,the frequency bandwidth of the antenna broadening,each frequency band bandwidth reaches1.1GHz.The simulation and test results show that the antenna impedance bandwidth is3.5GHz-4.6GHz and5.5GHz-7GHz,and the antenna has dual polarization characteristics in this frequency band.The antenna can be used for ultra wideband locating base station and transmitting labels can be placed arbitrarily.