Next Article in Journal
An Intelligent Automated Door Control System Based on a Smart Camera
Next Article in Special Issue
Air-Coupled Piezoelectric Transducers with Active Polypropylene Foam Matching Layers
Previous Article in Journal
A Mobile Acoustic Subsurface Sensing (MASS) System for Rapid Roadway Assessment
Previous Article in Special Issue
Development of a Micro-Gripper Using Piezoelectric Bimorphs
Sensors 2013, 13(5), 5897-5922; doi:10.3390/s130505897

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

* ,
Electrical Engineering & Computer Science Department, University of Central Florida, Orlando, FL 32816, USA Current address: Mnemonics Inc., Melbourne, Fl 32934, USA.
* Author to whom correspondence should be addressed.
Received: 10 March 2013 / Revised: 18 April 2013 / Accepted: 24 April 2013 / Published: 10 May 2013
(This article belongs to the Special Issue Piezoelectric Sensors and Actuators)


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.
Keywords: surface acoustic wave; RFID; sensor; spread spectrum surface acoustic wave; RFID; sensor; spread spectrum
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
MDPI and ACS Style

Malocha, D.C.; Gallagher, M.; Fisher, B.; Humphries, J.; Gallagher, D.; Kozlovski, N. A Passive Wireless Multi-Sensor SAW Technology Device and System Perspectives. Sensors 2013, 13, 5897-5922.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here


Cited By

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert