Design And Manufacturing Process Of UHF RFID Ear Tag For Cattle

Common cattle ear tags with QR code have many defects such as small storageinformation, short read range, unchangeable storage information, vulnerable toenvironmental pollution, inconvenient, poor anti-false performance etc, therefore can’tmeet the requirements of large-scale modern farming and food safety traceability system.In contrast, UHF RFID has more advantages, such as multiple targets fast recognition,dynamic identification, farther read range, good security performance, EEPROM,compatible with ERP system etc, and is very suitable for animal identification andmanagement. Therefore, this paper chooses cattle ear tags built-in UHF RFID label to bestudied.This paper designs and optimizes a folded dipole antenna based on a NXP G2XLchip by HFSS simulation analysis software, which used to fabrication UHF RFID ear tagsfor cattle. The antenna combinates the T match and the end capacitive load method, easilyrealizes the impedance match and easily adjusts the size. Measured by the samplepreparation, the read range is in3m above, achieving the requirements of the UHF RFIDindustry application.This paper makes RFID antenna on the PI film by nanometer ink-jet printing, whichis quick and efficient. The resistance ratio of antenna has achieved RFID industryapplication requirements. The research and implementation of the process is helpful toshort the proofing cycle of RFID tag antenna.This paper designs an utility ear tag for cattle with chimeric-welded structure,whichhas lower cost and higher efficiency. Furthermore, there is no damage to the built-in tagsin the whole welding process.This paper builds a simple UHF RFID read range testing platform,tests and analysisthe read range of label before and after packaged.Test finds that whether packaged, thereis recognition blind area in the read range of label.What’s more, the attenuation of the read range of label after packaged is up to36%.This paper illustrates the recognition blindarea is mainly caused by electromagnetic wave reflection, and the read range attenuationis due to packaging materials which change the dielectric constant of antenna dielectric layer andthen change the electromagnetic performance of the label, through HFSS simulation analysis andplane wave oblique incidence model analysis.