Adaptive impedance matching system for downlink of passive semi-ultra wideband ultra-high frequency radio frequency identification tag

2012 ◽  
Vol 26 (6) ◽  
pp. 530-540 ◽  
Author(s):  
Gui-ying Zhang ◽  
Yu-jie Dai ◽  
Xiao-xing Zhang ◽  
Ying-jie Lv
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
High Frequency ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Ultra High Frequency ◽  
Frequency Identification

scholarly journals A novel reverse design method of tag antenna based on image analysis

2020 ◽  
Vol 14 ◽  
pp. 174830262090696
Author(s):  
Zhenlu Liu ◽  
Zhimin Zhao ◽  
Xiaolei Yu ◽  
Mengjie Liu ◽  
Rendong Ji
Keyword(s):  
Image Analysis ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
High Frequency ◽  
Design Method ◽  
Impedance Matching ◽  
Simulation Software ◽  
Ultra High Frequency ◽  
Antenna Performance ◽  
Frequency Identification

Since the working efficiency of the entire radio frequency identification system depends on the performance of the radio frequency identification tag antenna, the research and design of the tag antenna have received attention, especially for radio frequency identification tags applied to special scenes. We mainly studied the effect of antenna bending on the performance of ultra-high frequency radio frequency identification systems, and combined the bent antenna with the impedance matching loop to achieve impedance matching between the chip and the antenna in the ultra-high frequency band. We analyzed the variation of tag antenna performance with antenna parameters by the simulation software High Frequency Structure Simulator (HFSS). At the same time, we propose a novel antenna reverse design method. Through the analysis of the antenna-specific absorption rate image, the antenna performance intensity is visually reflected. According to the image analysis result, the antenna parameters are corrected to improve the antenna matching performance. This design method is simpler and faster than other methods.

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