Optimization Design of Passive RFID Tag Antenna Model for Bolt Looseness Detection of Hydroelectric Unit
SONG Kun
XIE Rong
RAN Yunzheng
LU Luoping
ZHONG Jianwei
LIAO Honghua
Abstract：In order to assist the management of bolt looseness detection,radio frequency identification(RFID)technology was applied to bolt looseness detection.A passive RFID tag antenna model for bolt looseness detection was designed.Firstly,the bent dipole and end short circuit design were used to make the antenna reach the target center resonant frequency.Secondly,a rectangular loop feed design was added under the antenna structure,which was similar to the matching loop structure,so that the tag antenna and the target chip were realized impedance matching.The high frequency structural simulator(HFSS)software was used to simulate and optimize the structure parameters of the label antenna,so that the final size of the tag antenna was determined to be 60.0mm×60.0mm×1.6mm.The impedance of the Farsens Rocky 100 chip at 915 MHz is 51-j460Ω.The simulation showed that the impedance of the tag antenna was 46.7+j461.4Ω,which was well matched with the chip.The center frequency of the antenna was 915 MHz,and the bandwidth of return loss less than-10dB was 840～970 MHz.The maximum gain was 0.8dB,which met the distance requirement of bolt loosening detection.This study had certain application value in bolt loosening detection.
Keywords：bolt looseningRFIDtag antennabending dipoleimpedance matchingHFSS simulationreturn loss
Publication Date：2024-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 64-68,74 )