Design of an Ultra-Compact UHF Passive RFID Tag Antenna for a Medical Sample Tube

In this letter, a small-sized ultra-high frequency (UHF) RFID tag antenna for a medical sample tube is proposed. The RFID tag antenna is designed and fabricated based on the circular loop antenna used in the UHF band (Korea standard, 917 MHz to 923.5 MHz). The tag antenna size is reduced using a circular meander stub. The antenna has a physical size of 8 mm, which is about λ/40 in electrical length. The proposed tag antenna is molded into a medical sample and multitag identification is performed.

[1]  K. Quboa,et al.  A New Fractal Loop Antenna For Passive UHF RFID Tags Applications , 2008, 2008 3rd International Conference on Information and Communication Technologies: From Theory to Applications.

[2]  Mun Leng Ng,et al.  A small passive UHF RFID tag for livestock identification , 2005, 2005 IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications.

[3]  Hosung Choo,et al.  Design of UHF small passive tag antennas , 2005, 2005 IEEE Antennas and Propagation Society International Symposium.

[4]  Jong-Suk Chae,et al.  RFID Tag Antenna Coupled by Shorted Microstrip Line for Metallic Surfaces , 2008 .

[5]  Young Joong Yoon,et al.  Small-sized spiral dipole antenna for RFID transponder of UHF band , 2005, 2005 Asia-Pacific Microwave Conference Proceedings.

[6]  Jong-Myung Woo,et al.  Size Reduction in UHF Band RFID Tag Antenna Based on Circular Loop Antenna , 2005, 2005 18th International Conference on Applied Electromagnetics and Communications.

[7]  Hong-Kyun Ryu,et al.  Miniaturisation of rectangular loop antenna using meander line for RFID tags , 2007 .

[8]  Cheol-Sig Pyo,et al.  Shorted Microstrip Patch Antenna Using Inductively Coupled Feed for UHF RFID Tag , 2008 .