Title

A Passive Wireless Multi-Sensor SAW Technology Device and System Perspectives

Authors

Authors

D. C. Malocha; M. Gallagher; B. Fisher; J. Humphries; D. Gallagher;N. Kozlovski

Comments

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Abbreviated Journal Title

Sensors

Keywords

surface acoustic wave; RFID; sensor; spread spectrum; SURFACE ACOUSTIC-WAVES; SENSORS; Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation

Abstract

This paper will discuss a SAW passive, wireless multi-sensor system under development by our group for the past several years. The device focus is on orthogonal frequency coded (OFC) SAW sensors, which use both frequency diversity and pulse position reflectors to encode the device ID and will be briefly contrasted to other embodiments. A synchronous correlator transceiver is used for the hardware and post processing and correlation techniques of the received signal to extract the sensor information will be presented. Critical device and system parameters addressed include encoding, operational range, SAW device parameters, post-processing, and antenna-SAW device integration. A fully developed 915 MHz OFC SAW multi-sensor system is used to show experimental results. The system is based on a software radio approach that provides great flexibility for future enhancements and diverse sensor applications. Several different sensor types using the OFC SAW platform are shown.

Journal Title

Sensors

Volume

13

Issue/Number

5

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

5897

Last Page

5922

WOS Identifier

WOS:000319445600031

ISSN

1424-8220

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