摘要
为了将缝隙天线应用于射频识别标签中,提出了一种新的设计标签用缝隙天线的方法.基于互补天线的阻抗关系式,由待设计缝隙天线的阻抗推算出互补电振子的阻抗,得到电振子的几何结构,设计出两款(偶对称和奇对称)超高频段(UHF)射频识别标签用缝隙天线.通过仿真给出了所设计天线的阻抗、反射系数(S11)随频率变化的曲线和辐射方向图,制作了相应的实物天线.设计、仿真与测试结果表明,整个设计过程简洁、清晰,设计效率较高,奇对称弯折缝隙天线的性能优于偶对称天线,仿真与测试结果吻合得较好.
In order to apply the slot antenna to the Radio Frequency Identification （RFID） tag, a new method to design the slot antenna for RFID tag is first proposed. In this method, the impedance expression of mutual-patch antenna is adopted to calculate the impedance of mutual-patch dipole antenna according to the impedance of the slot antenna to be designed. Next, the profile of the dipole antenna is determined, and two slot antennas respectively with even and odd symmetries are presented for RFID tag at ultra-high frequency band. Then, the simulation is performed to present the curves of impedance and return coefficient （S11） versus frequency and the radiated pattern. Fabricated antennas are finally produced according to the simulated results. The results of design, simulation and measurement indicate that the design method is simple, clear and efficient, that the performance of the odd-symmetry slot antenna is better than that of the even-symmetry one, and that the simulated results accord well with the measured ones.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第9期6-10,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省科技攻关项目(2003C40406)
关键词
射频识别
标签天线
缝隙天线
互补天线
阻抗关系
矩量法
Radio Frequency Identification
tag antenna
slot antenna
mutual-patch antenna
impedance relationship
method of moment
