TENG Fei, CHENG Xiu-yang
(College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China)
Abstract： A method is proposed to eliminate undesired resonant points of a dual-layer circular polarization microstrip antenna, the frequency of which is 2.42 GHz. The simulation results show that there are two undesired resonant points, the frequencies of which are both greater than the resonant frequency. One is around 4.4 GHz, while the other is around 5.8 GHz. As they would disturb the proper functioning of the antenna, the paper will eliminate the undesired resonant points by cutting U-shaped slots on the ground. Size of the slot is half of the wavelength of corresponding frequency point if slot is cut on the patch, while it is a quarter of the wavelength if there is a opening port on the slot. The simulation results show that it's effective to eliminate the undesired resonant points in this way.
Key words： resonant points； microstrip antenna； U-shaped slot； simulation
CLD number： TP820.1+1 Document code： A
Article ID： 1674-8042(2014)02-0080-03 doi： 10.3969/j.issn.1674-8042.2014.02.016
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一种在接地板开U型缝消除微带天线杂谐振点的方法滕飞, 程秀洋
(山东科技大学 电气与自动化工程学院，山东 青岛 266590)
摘要:本文提出一种消除微带天线杂谐振点的方法， 该微带天线为双层介质板， 其谐振频率为 2.4 GHz， 共有两个杂谐振点分别在 4.4 GHz 附近及 5.8 GHz 附近。 这两个杂谐振点破坏了微带天线的性能， 故本文通过在接地板上合理地开U型缝来消除这两个谐振点， U型缝隙的长度为相应频率谐振点波长的一半； 如果在缝隙上有开放端口， 则U型缝隙长度为相应频率谐振点波长的四分之一。 仿真结果表明： 该方法可有效消除杂谐振点。
关键词:谐振点； 微带天线； U型缝； 仿真
引用格式：TENG Fei, CHENG Xiu-yang. A method of elimination of undesired resonant points of microstrip antenna by cutting U-shaped slot on the ground. Journal of Measurement Science and Instrumentation, 2014, 5(2): 80-82. [doi: 10.3969/j.issn.1674-8042.2014.02.016]
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