一种基于QMSIW的小型化高隔离双频天线设计  

Design of a miniaturized high-isolation dual-frequency antenna based on quarter-mode substrate integrated waveguide

作　　者：李晓龙 刘佳鑫 郭庆功[1] Li Xiaolong;Liu Jiaxin;Guo Qinggong(College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电子信息学院,成都610065

出　　处：《强激光与粒子束》2025年第4期45-50,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(62071316)。

摘　　要：设计实现了一种基于四分之一模基片集成波导(Quarter-Mode Substrate Integrated Waveguide,QMSIW)应用于5.2 GHz/5.8 GHz的双频天线。采用QMSIW结构,在保持了基片集成波导(SIW)的低损耗、低剖面等特性的情况下,减小了天线的体积。通过在QMSIW腔体上添加两排金属化通孔并刻蚀两条矩形槽以及不对称Y形槽,减小其尺寸并实现较高的隔离度。经过测试,天线在5.2 GHz和5.8 GHz的增益分别为6.0和6.1 dBi,交叉极化比分别大于20 dB和25 dB。所设计的天线实现了良好的小型化和大于34 dB的高隔离度,尺寸为0.42λ_(0)×0.42λ_(0)×0.01λ_(0)。实物测试结果与仿真结果吻合良好。A dual-band antenna based on the quarter-mode substrate integrated waveguide(QMSIW)operating at 5.2GHz and 5.8GHz is designed and implemented.The QMSIW structure reduces the volume of the antenna while maintaining the characteristics of low loss and low profile of the substrate integrated waveguide(SIW).By adding two rows of metallized through holes to the QMSIW and etching two rectangular slots and asymmetric Y-shaped slots,the size is reduced and high isolation is achieved.After testing,the antenna gains at 5.2 GHz and 5.8 GHz are 6.0 and 6.1dBi,respectively,with cross-polarization ratios greater than 25 dB and 20 dB,respectively.The proposed antenna achieves good miniaturization and high isolation(greater than 34 dB),with dimensions of 0.42λ_(0)×0.42λ_(0)×0.01λ_(0).The test results agree well with the simulation results.

关 键 词：四分之一模基片集成波导 高隔离 双频 小型化天线 

分 类 号：TN828[电子电信—信息与通信工程]