MO2.L2.3
Low-Power Ultrasonic Wake-Up through Metal
Thomas Schaechtle, Fabian Höflinger, University of Freiburg, Germany; Georg K. J. Fischer, Fraunhofer Institute for High-Speed Dynamics, Germany; Jan Helmerich, University of Freiburg, Germany; Ivo Häring, Fraunhofer Institute for High-Speed Dynamics, Germany; Stefan J. Rupitsch, University of Freiburg, Germany
Session:
MO2.L2: Wireless Power Transfer and low-power applications Oral
Track:
Energy Harvesting and Wireless Power Transfer
Location:
Room 2
Presentation Time:
Mon, 4 Sep, 12:20 - 12:40 Portugal Time (UTC +1)
Abstract
Nowadays, increasing digitization may give acoustic communication an essential role in areas where electromagnetic communication cannot be employed, or only with extensive effort. Consequently, challenges from real-world applications are increasingly important for the deployment of acoustic communication systems. One major challenge to be addressed is the limited energy resources that battery-powered sensor nodes possess. Besides the high energy consumption during transmission and reception, listening to the communication channel for synchronization between transmitter and receiver is a major energy consuming factor. For this purpose, we introduce the concept of wake-up receivers known from radio technology for acoustic communication systems. Therefore, in this contribution a concept of a low-power acoustic wake-up receiver is presented and implemented with a demonstrator through a 1.6 mm thick metal barrier. We exploit the thickness vibration mode of a piezoelectric transducer at 1.2 MHz to form a subcarrier at 18 kHz. A selective wake-up with a 16 bit address is generated at a data rate of 1 kbps. The acoustic wake-up receiver reliably detects a valid wake-up at an energy consumption of 15 µW.
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Session MO2.L2
MO2.L2.1: WPT AND NFC INTEROPERABILITY FOR WEARABLES WITH MINIATURIZED COILS
Richard Bernd Fischbacher, Jose Romero Lopera, David Pommerenke, Graz University of Technology, Austria; Ralph Prestros, Bernhard Auinger, Silicon Austria Labs, Austria; Wolfgang Bösch, Jasmin Grosinger, Graz University of Technology, Austria
MO2.L2.2: PLANAR ROTATING MAGNETIC FIELD INSIDE A CUBIC STRUCTURE FOR RFID/NFC APPLICATIONS
Jie Sun, Antoine Diet, Yann Le Bihan, Marc Biancheri-Astier, Chadi Gannouni, Michel Police, GeePS, France
MO2.L2.3: Low-Power Ultrasonic Wake-Up through Metal
Thomas Schaechtle, Fabian Höflinger, University of Freiburg, Germany; Georg K. J. Fischer, Fraunhofer Institute for High-Speed Dynamics, Germany; Jan Helmerich, University of Freiburg, Germany; Ivo Häring, Fraunhofer Institute for High-Speed Dynamics, Germany; Stefan J. Rupitsch, University of Freiburg, Germany
MO2.L2.4: EXPLOITING SELF-TUNABLE RFID CHIPS FOR WIRELESS SENSING OF PERMITTIVITY TO ENABLE PASSIVE LOW-COST FOOD-QUALITY MONITORING SYSTEMS
Francesco Piccinno, University of Salento, Italy; Federica Naccarata, University of Rome Tor Vergata, Italy; Riccardo Colella, Francesco Paolo Chietera, Luca Catarinucci, University of Salento, Italy; Gaetano Marrocco, University of Rome Tor Vergata, Italy