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Analysis and Design of UHF Bow-Tie RFID Tag Antenna Input Impedance
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作者 D. A. Abd El-Aziz T. G. Abouelnaga +2 位作者 E. A. Abdallah M. El-Said Yaser S. E. Abdo 《Open Journal of Antennas and Propagation》 2016年第2期85-107,共23页
In this paper two proposed methods of input impedance calculation for Bow-Tie antenna are introduced. The proposed methods show input impedance calculation with high accuracy. Also, design curves for input impedance v... In this paper two proposed methods of input impedance calculation for Bow-Tie antenna are introduced. The proposed methods show input impedance calculation with high accuracy. Also, design curves for input impedance values were developed depending on the geometry of antenna. The proposed design curves are used to design a Bow-Tie type RFID tag antenna. The input impedance of the tag antenna is calculated using proposed methods and compared with that obtained using CST studio suite 2014 and IE3D Zeland version 12.0 software packages. The results are investigated and discussed. The tag antenna is fabricated, measured and the obtained input impedance is compared with the simulation and the proposed methods. Good agreement among measured input impedance and that simulated by CST, IE3D or proposed methods is obtained. 展开更多
关键词 BANDWIDTH Bow-Tie Antenna Radio frequency Identification (RFID) ultra high frequency (uhf)
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GIS用超高频传感器的校准:不同校准方法的比较及一种采用锥形天线的校准系统测试(英文) 被引量:2
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作者 David Gautschi Pierre Bertholet 《高电压技术》 EI CAS CSCD 北大核心 2011年第11期2643-2648,共6页
Different methods of calibrating ultra high frequency(UHF) sensors for gas-insulated substations(GIS) were investigated in the past.The first approach was to use strip lines,triplates and TEM calibration cells.These c... Different methods of calibrating ultra high frequency(UHF) sensors for gas-insulated substations(GIS) were investigated in the past.The first approach was to use strip lines,triplates and TEM calibration cells.These cells had already been in use for years for example to test the electromagnetic compatibility of electronic devices.The smaller the size of the cell,the higher its bandwidth-but the cell should be large enough to not disturb the electric field with the installed sensor under test.To overcome this problem,a calibration procedure using a gigahertz transverse electromagnetic (GTEM) test cell and a pulsed signal source were introduced in 1997.Although this procedure has many advantages and is easy to understand,measurements show several shortcomings of this calibration method.To overcome the disadvantages of the known systems,a calibration cell using a monopole cone antenna and a metallic ground plane were developed and tested.The UHF sensor was placed in a region with minimum distortion of the electric field due to its installation.Experience shows that the new method for calibrating UHF sensors is necessary in order to overcome the limits in the calibration of large sensors and to suppress the propagation of higher order modes and reflections.Due to its surprisingly simple structure,its low price and low overall measurement uncertainty,it is the preferred method for calibrating UHF sensors for GIS applications. 展开更多
关键词 ultra high frequency(uhf) sensors partial discharge detection partial discharge monitoring gas insulated substations(GIS) calibration of sensors calibration cells cone calibration system
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