Modeling electrical response of polymer-coated SAW resonators by equivalent circuit representation

被引：7

作者：

Kshetrimayum, Roshan ^{[1
]}

Yadava, R. D. S. ^{[2
]}

Tandon, R. P. ^{[1
]}

机构：

[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

[2] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

来源：

ULTRASONICS | 2011年 / 51卷 / 05期

关键词：

SAW resonators; Equivalent circuit model; Coupling-of-modes (COM) theory; SAW chemical sensor; Viscoelastic polymer; CHEMICAL SENSORS; QUARTZ RESONATOR; FILM RESONANCE; STW RESONATORS; GAS SENSOR; THICKNESS; OSCILLATORS; DEVICES; LINE;

D O I：

10.1016/j.ultras.2010.12.006

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The paper presents an equivalent circuit model of the polymer coated surface acoustic wave (SAW) resonators by combining coupling-of-mode (COM) description of SAW resonators and perturbation calculation of SAW propagation under polymer loading. An expression for the motional load produced by polymer coating is deduced in terms of COM parameters and polymer characteristics. In addition, expressions for the shifts in resonance frequency and attenuation due to polymer loading are obtained. Simulation results are presented for one-port and two-port resonator devices coated with viscoelastic thin polymer film. The influence of polymer film on resonator response is studied with regard to variations in film thickness and shear modulus. The model simplifies understanding of polymer-coated SAW sensors. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：547 / 553

页数：7

共 32 条

[1]

Auld B., 1973, Acoustic fields and waves in solids, V1st edn

[2] Investigations on plasma-polymer-coated SAW and STW resonators for chemical gas-sensing applications [J].

Avramov, ID ;

Kurosawa, S ;

Rapp, M ;

Krawczak, P ;

Radeva, EI .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2001, 49 (04) :827-837

[3] Comparative studies on polymer coated SAW and STW resonators for chemical gas sensor applications [J].

Avramov, ID ;

Rapp, M ;

Voigt, A ;

Stahl, U ;

Dirschka, M .

PROCEEDINGS OF THE 2000 IEEE/EIA INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM & EXHIBITION, 2000, :58-65

[4] Gas Sensitivity Comparison of Polymer Coated SAW and STW Resonators Operating at the Same Acoustic Wave Length [J].

Avramov, Ivan D. ;

Rapp, Michael ;

Kurosawa, Shigeru ;

Krawczak, Piotr ;

Radeva, Ekaterina Ivanova .

IEEE SENSORS JOURNAL, 2002, 2 (03) :150-159

[5] Modeling the responses of thickness-shear mode resonators under various loading conditions [J].

Bandey, HL ;

Martin, SJ ;

Cernosek, RW ;

Hillman, AR .

ANALYTICAL CHEMISTRY, 1999, 71 (11) :2205-2214

[6]

Campbell C. K., 1998, SURFACE ACOUSTIC WAV

[7] Comparison of lumped-element and transmission-line models for thickness-shear-mode quartz resonator sensors [J].

Cernosek, RW ;

Martin, SJ ;

Hillman, AR ;

Bandey, HL .

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 1998, 45 (05) :1399-1407

[8] Humidity sensors made on polyvinyl-alcohol film coated SAW devices [J].

Chen, Y. -T. ;

Kao, H. L. .

ELECTRONICS LETTERS, 2006, 42 (16) :948-950

[9]

DATTA S, 1986, SURFACE ACOUSTIC WAV, pCH6

[10]

DAVID SB, 1992, ANAL CHEM, V64, P3069

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