阶跃阻抗谐振器结构的双频差分天线  

Dual-band Differential Antenna Based on Stepped Impedance Resonator

作　　者：马润波[1] 张文梅[1] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《测试技术学报》2011年第5期414-420,共7页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(60771052);国家博士后基金特别资助(200801424);山西省高校青年学术带头人专项基金(2009021019-1);山西省青年科学基金(2010021015-1)

摘　　要：提出了一种采用阶跃阻抗谐振器(SIR)结构设计的同轴馈电双频差分天线.天线具有对称结构,其传输线模型包含两个谐振单元.通过对谐振单元的简化和分析,证明了谐振单元类似于标准的1/4波长SIR,并导出了谐振单元的电长度和阻抗比与双频天线工作频率的关系.依照该方法设计了一个2.4/5.2 GHz的双频差分天线,同时用模型仿真的方法优化了天线的馈电位置.所实现的天线尺寸为28.2mm×23.5 mm,相当于0.4λ×0.33λ.通过制作和实测,天线工作在2.38 GHz和5.11 GHz,对应的增益分别为1.9 dBi和6.6 dBi.仿真和测试结果表明,采用阶跃阻抗谐振器设计双频差分天线的方法是可行且有效的.This paper presents a method for the coaxial feeding dual-band differential antenna with stepped impedance resonator （SIR） structure. The antenna is symmetric, and its transmission line model contains two resonant units. By simplifying and analyzing the resonant unit, it is proved that the resonant unit is similar to the standard one-quarter wavelength SIR, and the relationship between the electric length and impedance ratio of the resonant unit and the operating frequencies is deduced. According to the method, a 2.4/5.2 GHz dual- band differential antenna is designed, and the positions of the feed points are optimized when the antenna model is simulated. The realized antenna size is 28.2 mm ×23.5 mm, equivalent toO. 43. × 0.33A. Being fabricated and measured, the designed antenna has operating frequencies of 2.4 GHz and 5.11 GHz, the corre- sponding gains of 1.9 dBi and 6.6 dBi, respectively. The simulated and measured results show that the prsented method for designing dual-band differential antenna is feasible and effective.

关 键 词：阶跃阻抗谐振器 双频 差分 天线 传输线模型 

分 类 号：TN823.24[电子电信—信息与通信工程]