1. Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 M. Cicioni, A. Scorzoni, P. Placidi, F. Alimenti DIEI Università degli Studi di Perugia, Via Duranti 93, 06125 Perugia, Italy S. Zampolli, G.C. Cardinali, I. Elmi CNR – IMM Sezione di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy University Barcelona Flexible Tag Gas Sensing System for Food Logistics Applications

2. Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 Scenario A flexible tag gas sensing system with Radio Frequency IDentification (RFID) communication capabilities for food logistics is being proposed The final device will be a flexible label hosting sensing capabilities and a RFID interface for wireless data exchange within an Ambient Intelligence (AmI) infrastructure This visionary application requires the development and optimization of several Micro System Technologies Ami Network Reader (with gas sensing capabilities) AmI node Flexible Tag Microlab Flexible Tag Microlab Flexible Tag Microlab

3. Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 System architecture 1 2 3 4 5 Custom RFID circuitry with discrete components (ISO-15693 Vicinity Card): antenna (1) analog front-end (2) digital circuitry (sensor control and signal acquisition) (3) commercial RH & temperature sensor and light sensor (4) thin film flexible battery and switching power supply (5) + Ultra-low power (ULP) Metal OXide (MOX) sensor

4. Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 RFID capabilities Reader Tag 100% Amplitude Shift Keying (ASK) pulse position coding Analog front-end rectifies the incoming signal CPLD hw demodulates the signal Tag Reader Antenna loading to generate subcarriers: Frequency Shift Keying (FSK) modulation CPLD and C manage the transmission implemented on CPLD implemented on µC implemented on both CPLD and µC Antenna Demodulator Decoding of incoming message Preparation of outgoing message Analog Front-End Modulator Control Unit Digital blocks

5. Ischia, 21-23 giugno 2006Riunione Annuale GE 2006 Conclusions Prototypes of RFID antennas on flexible substrate and active (battery powered) RFID circuits were realized and tested ULP MOX sensor hotplates have been designed through FEM simulations, and physically realized RFID tags featuring MOX sensors will be available by the end of 2006