Dissertation Defense WHAT: Richard Fletcher Low-Cost Electromagnetic Tagging: Design and Implementation PLEASE NOTE NEW DATE! WHEN: Wednesday, July 24, 2002 2:00 PM EST WHERE: E15-070 Bartos Theatre [map] Wiesner Building 20 Ames Street Cambridge, MA WEBCAST: high bandwidth (320x240) || low bandwidth (160x120) DISSERTATION COMMITTEE Neil Gershenfeld MIT Media Arts and Sciences Robert O'Handley MIT Materials Science and Engineering Department Hap Patterson Chief Technical Advisor Sensormatic, Inc. ABSTRACT: Several implementations of chipless RFID (Radio Frequency Identification) tags will be presented and discussed as low-cost alternatives to chip-based RFID tags and sensors. Fletcher will present an overview of present-day near-field electromagnetic tagging, including both chip-based and chipless technologies with associated costs. As a candidate for low-cost ID tags, a design theory and implementation will be presented for multiply-resonant planar LC structures which provides significantly greater bits-per-unit-area relative to the present day state-of-the-art. Other chipless approaches to ID tags using magnetic material structures will also be presented. In addition to identification, Fletcher will discuss how low-cost chipless technologies can also be designed to function as wireless sensors. Several examples will be discussed in detail, including: 1) a family of magnetic materials tags for measuring temperature parameters; and 2) a family of planar LC tags for sensing pressure, humidity, light and pH. Finally, Fletcher will describe the evolution of his work in developing the necessary (and low-cost) instrumentation to support these new varieties of tag technologies, ranging from a $500 agile reader to a $5 reader for toy applications. MIT Media Laboratory Home Page | Events Main Index