학술논문
Detecting range and coupling coefficient tradeoff with a multiple loops reader antenna for small size RFID LF tags
Document Type
Conference
Author
Source
2012 IEEE International Conference on RFID-Technologies and Applications (RFID-TA) RFID-Technologies and Applications (RFID-TA), 2012 IEEE International Conference on. :154-159 Nov, 2012
Subject
Language
Abstract
This paper summarizes some tests with Low Frequency (LF, 125 kHz) RFID tags of two types: Card and Token. These tests were done in order to evaluate the feasibility of an identification/traceability of tags which size is constrained and supposed to be detected inside a delimited volume of 40×40×10 cm 3 . As the size of the antenna tag is supposed to be very small, we improve the detection range and volume of definition by designing different reader antennas. Reader antennas presented are of two types whether they are based on single (SL) or multiple loops (ML). Detection range was evaluated for planar antennas (3 SL and one ML). Volume of definition for the detection was estimated by designing two-level prototypes of ML antennas. Results are discussed about the optimization possibility of detection range and volume thanks to ML.