title: An electronic-nose sensor node based on a polymer-coated surface acoustic wave array for wireless sensor network applications.
abstract: This study developed an electronic-nose sensor node based on a polymer-coated surface acoustic wave (SAW) sensor array. The sensor node comprised an SAW sensor array, a frequency readout circuit, and an Octopus II wireless module. The sensor array was fabricated on a large K(2) 128° YX LiNbO3 sensing substrate. On the surface of this substrate, an interdigital transducer (IDT) was produced with a Cr/Au film as its metallic structure. A mixed-mode frequency readout application specific integrated circuit (ASIC) was fabricated using a TSMC 0.18 μm process. The ASIC output was connected to a wireless module to transmit sensor data to a base station for data storage and analysis. This sensor node is applicable for wireless sensor network (WSN) applications.
authors.affiliation: Department of Electrical Engineering, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.
authors.forename: Kea-Tiong
authors.initials: KT
authors.lastname: Tang
authors.forename: Cheng-Han
authors.initials: CH
authors.lastname: Li
authors.forename: Shih-Wen
authors.initials: SW
authors.lastname: Chiu
mesh_terms: D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D011108:Polymers / Q000737:chemistry*; D013016:Sound; D059015:Wireless Technology / Q000295:instrumentation*
chemical_list: D011108:Polymers