Title

Spread Spectrum Orthogonal Frequency Coded SAW Tags and Sensors Using Harmonic Operation

Authors

Authors

D. R. Gallagher; M. W. Gallagher; N. Saldanha; J. M. Pavlina;D. C. Malocha

Comments

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Abbreviated Journal Title

IEEE Trans. Microw. Theory Tech.

Keywords

Acoustic devices; harmonic generation; microsensors; multisensor; systems; orthogonal frequency coding (OFC); sensors; spread spectrum; communication; surface acoustic waves (SAWs); SAW devices; Engineering, Electrical & Electronic

Abstract

This paper presents a preliminary investigation of orthogonal frequency coding (OFC) surface acoustic wave tags and sensors at a 500- and 900-MHz operational frequency range using conventional contact lithography techniques. The higher frequency devices are achieved using second harmonic operation; eliminating the need for advanced lithography techniques. The objective of this effort is to increase the technology readiness level of wideband OFC tags at higher frequencies. Measured device results are presented and compared with coupling of modes model predictions to demonstrate performance. The fundamental and harmonic device response is compared for devices designed for operation in the 900-MHz frequency band. The experimental correlation against an ideal matched filter is also presented.

Journal Title

Ieee Transactions on Microwave Theory and Techniques

Volume

58

Issue/Number

3

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

674

Last Page

679

WOS Identifier

WOS:000275559700021

ISSN

0018-9480

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