您的位置 : Non-Self-Jamming Millimeter-Sized Radio-Frequency Identification (RFID)
Location: 浙江大学玉泉校区行政楼208会议室
Time: 2012年3月23日（星期五） 10:00-11:30am
Abstract: Miniature passive RFID is an important component in many sensor network and biomedical applications. To reduce the system antenna size, higher frequency in the high 10 GHz band has to be employed. Self interference and multi-path backscattering have also been a serious problem. We present a new RFID system based on efficient harmonic generation of the nonlinear transmission lines (NLTL). Because the backscattered signal is at the second or third harmonics of the fundamental interrogating frequency, self jamming from readers and multi-path reflection can be readily resolved. There are two additional fundamental advantages for the NLTL designs. First, the Bragg frequency can be set in the transmission line to avoid power spreading into spurious harmonics. Second, the NLTL can be designed with broadband self-impedance matching, eliminating the needs of narrow-band matching network. Both features can contribute to significant reduction in the total signal path loss, and hence extend the reading range.
Matched NLTL with dual antennas and reflective NLTL with single antenna on the RFID tag will be investigated for efficiency comparison. We will present the full RFID system, smaller than 10mm2 with antennas, and the associated ASK/BPSK ID data modulation and analog sensor integration schemes. As an illustration in structural integrity sensor network, a capactive pressure sensor is integrated into the RFID tag to give 0.25o/fF phase shift, which gives 9-bit precision in pressure reading. This new NLTL system is the smallest passive harmonic RFID with the longest range to date.
Biography
Edwin Chihchuan Kan received the B.S. degree from National Taiwan University, Taipei, Taiwan,
R.O.C., in 1984, and the M.S. and Ph.D. degrees from the University of Illinois, Urbana, in 1988 and 1992, respectively, all in electrical engineering. In January 1992, he joined Dawn
Technologies as a Principal CAD Engineer developing advanced electronic and optical device simulators and technology CAD framework. He was then with Stanford University, as a Research
Associate from 1994 to 1997. From 1997 to 2002, he was an Assistant Professor with the School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, where he is now a Professor and Director of Graduate Studies. He has spent the summers of 2000 and 2001 at IBM Microelectronics, Yorktown Heights and Fishkill, NY, in the Faculty Partner Program. In 2004 and 2005, he has been a visiting researcher at Intel Research, Santa Clara, CA, and a visiting professor at Stanford University during his sabbatical leave. His main research areas include
CMOS technology, semiconductor device physics, flash memory, CMOS biosensors, ultra�low power radio link, technology CAD, and numerical methods for PDE and ODE.
Dr. Kan received the Presidential Early Career Award for Scientists and Engineer (PECASE) in October 2000 from the White House. He also received several teaching awards from Cornell Engineering College for his CMOS and MEMS courses.
