E&CSE Research Seminar, Tuesday 08 - 05 - 2007

Abstract:

RFID (Radio Frequency IDentification) is going to be a revolutionary force in terms of the way we live our lives in the future. The major factor holding back large scale implementation of RFID systems is their cost. Chipless RFID systems have the ability to overcome this cost limitation however there are other problems in designing a working system with low-cost components. The goal of our project is to create a novel chipless RFID system based on microstrip technology with implementation onto thin polymer technology in the future. The system will use frequency signatures to encode binary data on the tags and SDMA (Space Division Multiple Access) techniques to distinguish between tags in the interrogation area. My work on this project is to design the transponder for such a system. The transponder is an integral component of the system and the major factor in the system’s overall cost. Several designs have been developed including a mini hairpin bandpass filter, a cross coupling resonator bandpass filter, an ITS (Isosceles Triangle Spiral) resonator bandstop filter and a Pythagorean tree antenna that has sharp resonances at multiple frequencies. These high Q resonances will be used as the frequency signatures for our proposed chipless RFID transponders/tags.