A temporal multi-frequency encoding technique for chipless RFID based on c-sections
Abstract
A time domain chipless RFID tag based on cascaded microstrip coupled transmission line sections (C-sections), which can operate in multi-frequency bands is presented. The group delay characteristics of the C-sections are exploited to generate the tag Identification (ID). The tag comprises cascaded commensurate group of C-sections and two cross-polarized ultra wide-band (UWB) antennas. Since the proposed tag can operate in multi-frequency bands, this paper proves the possibility of increasing the coding capacity compared to the existing time domain designs. A tag operating at ISM (Industrial Scientific and Medical) bands at 2.45 GHz and 5.8 GHz together with conformance of frequency and power regulations is discussed elaborately. The prototype of the device is fabricated and validated experimentally. The time domain characteristic of the tag is also validated experimentally by interrogating a short pulse. Furthermore, measurement results using commercial Ultra Wide Band (UWB) radar which can be used as a chipless RFID reader is also incorporated. The obtained results confirm the concept and the possibility of using temporal multi-frequency in chipless RFID. (25 References).
Keywords
encoding polarisation radiofrequency identification ultra wideband antennas ultra wideband radar time-domain analysis UWB radar commercial ultra wide band radar ISM band coding capacity multifrequency bands cross-polarized ultra wide-band antennas group delay characteristics C-sections cascaded microstrip coupled transmission line sections time domain chipless RFID tag temporal multifrequency encoding technique RFID systems [B6250L] Radar equipment
systems and applications [B6320] Mathematical analysis [B0220] Codes [B6120B] Single antennas [B5270B]