【作者】 陈涛华； 陈月云； 简荣灵；

【Author】 Chen Taohua;Chen Yueyun;Jian Rongling;University of Science & Technology Beijing;

【机构】 北京科技大学；

【摘要】 本文提出了一种基于TM_1/2,0、TM₁₀和TM₁₂三模辐射的宽带微带天线。首先,通过在贴片上的馈电点附近加载一个倒U形槽实现良好的阻抗匹配,同时将贴片分成两个部分。之后,在小贴片的上边缘下加载一个短路面,产生一个靠近TM₁₀模的TM_1/2,0模扩展天线的阻抗带宽。最后,为了进一步扩展天线带宽,增大了天线的宽度并在贴片上加载两个对称的垂直矩形槽,降低了TM12模式的频点。基于以上方法,将三个辐射模相互靠近实现带宽扩展。仿真结果表明所提出的天线实现了26.5%的阻抗带宽,并在频带内保持了稳定的法向辐射。更多还原

【Abstract】 In this paper,a broadband microstrip antenna under operation of TM_1/2,0,TM₁₀ and TM₁₂ modes is proposed.Firstly,a good impedance matching is achieved by loading an inverted U-shaped slot near the feeding point on the patch,and the patch is divided into two parts.Then,a shorting wall is added underneath the upper edge of smaller patch,which will excite another TM_1/2,0 mode close to TM₁₀ mode to expand the impedance bandwidth.Finally,to further extend the antenna bandwidth,the antenna width is enlarged and two symmetrical vertical rectangular slots are cut on the patch to reduce the frequency of TM₁₂mode.Based on the arrangements above,three resonant modes are close to each other to achieve bandwidth enhancement.Simulation results show that the impedance bandwidth of proposed antenna is expanded to 26.5%.Moreover,a stable radiation pattern at broadside direction is realized over the operating band.更多还原