【作者】 王丛屹； 谭立容； 伍瑞新；

【Author】 WANG Congyi;TAN Lirong;WU Ruixin;School of Electronic Science and Engineering,Nanjing University of China;

【机构】 南京大学电子科学与工程学院；

【摘要】 本文主要设计与研究用于标签识别上的贴片天线,为实现该类型天线小尺寸,相对较低工作频点(915MHz)和高增益以及宽频带要求,在认真比对和分析各类天线特征以及优缺点后,本文决定采用Koch分形缺陷接地面结构来解决传统半波偶极子天线因频点较低而尺寸大的缺点,而为了解决分形缺陷几何结构因具有多谐振频点而带来的低增益、窄带宽固有缺点,在分形缺陷几何结构基础上加了具有较大带宽的半平面领结型天线作为对先前低增益和窄带的补偿。因此该结构天线具有低频点,尺寸小,频带宽,增益大的优点。更多还原

【Abstract】 In this paper,a small patch antenna in the application of RFID tags is being designed and analyzed. In order to realize the mini-size,compared lower working frequency(915 MHz),high-gain and wideband in this type of antenna, having been through meticulous comparing and analyzing characters, advantages and disadvantages between various types of antennas,the Koch Slot Ground Plane is adopted to solve the big size of traditional half wavelength bipolar antenna due to its lower resonant working frequency. To solve the low-gain and narrow bandwidth brought up by the multiple resonant frequencies which is the impossible eliminated character of the fractal geometry,the half-bowtie plane type which compensates the low gain and narrow-bandwidth is added on the foundation of fractal slot geometry. Thus,this type of antennas shares the advantages of lower working frequency,mini-size,wide bandwidth and high-gain.更多还原