Results 1 - 10 of 92

Interdigital sensors and transducers

by Alexander V. Mamishev, Kishore Sundara-rajan, Student Member, Fumin Yang, Student Member, Member Ieee, Markus Zahn Fellow Ieee - Proceedings of the IEEE 2004; 92(5):808–845
"... This review paper focuses on interdigital electrodes—a geo-metric structure encountered in a wide variety of sensor and transducer designs. Physical and chemical principles behind the operation of these devices vary so much across different fields of science and technology that the common features p ..."
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techniques, modeling of sensor parameters, application examples, and directions of future research. Keywords—Dielectric measurements, interdigital sensors, non-destructive testing (NDT), sensor design, sensor modeling, spec-troscopy, surface acoustic waves (SAWs), transducers. I.

Series-connected Interdigitated Surface Acoustic Wave Sensors for Structural Health Monitoring

by Goutham R Kirikera , Sridhar Krishnaswamy , 2009
"... Abstract: Active health monitoring using narrowband Raleigh-wave or modeselective Lamb-wave actuation and reception involves the use of a pair of matched multi-element transducer arrays. The spacing of the elements of the transducer arrays dictates the Lamb mode wavelength, and by appropriate choic ..."
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Abstract: Active health monitoring using narrowband Raleigh-wave or modeselective Lamb-wave actuation and reception involves the use of a pair of matched multi-element transducer arrays. The spacing of the elements of the transducer arrays dictates the Lamb mode wavelength, and by appropriate

Fabrication of Love Mode Surface Acoustic Wave Devices with Substrate Buried Interdigital Transducers

by Lamia El Fissi, Rachid Haouari, Laurent A. Francis
"... operated in liquids, e.g. biosensors, is focused on using different conventional piezoelectric substrates, and different guiding and sensing layers in order to obtain low insertion loss, high power durability, high sensitivities, etc. [1]. In a classical fabrication scheme, the device is configured ..."
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as a delay line and the metal electrodes of the interdigital transducers (IDTs) are buried between the piezoelectric substrate and the guiding layer. Although damascene processes have been developed for a shallow embedding of the electrodes in the substrate and to keep a flat surface, notably

Simulation of Surface Acoustic Wave Devices

by Sang Dae Yu
"... Abstract—The Mason crossed-field circuit model is gen-eralized to simulate apodized interdigital transducers with-out channel division. The apodized transducer model is based on the transmission line model, and the artificial transformer with different voltage and current coupling ra-tios is used to ..."
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Abstract—The Mason crossed-field circuit model is gen-eralized to simulate apodized interdigital transducers with-out channel division. The apodized transducer model is based on the transmission line model, and the artificial transformer with different voltage and current coupling ra-tios is used

Flexible Ultrasonic Transducers Using Piezoelectric Fiber Composites with Antisymmetric Interdigital Electrodes

by Ching-chung Yin, Yu-chien Wu, Yu-shyan Liu, Shih-ming Hsu
"... Abstract—A conformal ultrasonic transducer constructed by piezoelectric fiber composites (PFC) with new arrangement of electrodes is numerically and experimentally studied. This device is designed to transmit and receive guided waves of constant wavelength for structural health monitoring applicatio ..."
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waves in the host plate. The added mass effect of PFC has more notable influence on transmission of S0 modes than A0 mode in the area near both edges of PFC. The linear scan of transmitted acoustic waveforms along the axis in front of the transducer by a laser Doppler vibrometer reveals the near

Surface acoustic wave concentration of microparticle and nanoparticle suspensions

by James Friend, Haiyan Li, Leslie Yeo , 2007
"... A rapid particle concentration method in a sessile droplet has been developed using asymmetric surface acoustic wave (SAW) propagation on a substrate upon which the droplet is placed. The SAW device consisted of a 0.75-mm thick, 127.68 YXaxis-rotated cut LiNbO3 as a substrate. An interdigital transd ..."
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A rapid particle concentration method in a sessile droplet has been developed using asymmetric surface acoustic wave (SAW) propagation on a substrate upon which the droplet is placed. The SAW device consisted of a 0.75-mm thick, 127.68 YXaxis-rotated cut LiNbO3 as a substrate. An interdigital

Characteristics of Liquids Atomization Using Surface Acoustic Wave

by Minoru Kurosawa, Akira Futami, Toshiro Higuchi - Proc. of SPIE Vol. 8097 80971V-9 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 02/19/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx , 1997
"... A novel way to produce dry fog using a surface acoustic wave transducer has been proposed. This atomizer is suitable for miniaturization and for feed very small amount of mist to control atmospheric condition. The device is 4x8x0.6 mm3 LiNbO3 piezoelectric substrate. High frequency electrical power ..."
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A novel way to produce dry fog using a surface acoustic wave transducer has been proposed. This atomizer is suitable for miniaturization and for feed very small amount of mist to control atmospheric condition. The device is 4x8x0.6 mm3 LiNbO3 piezoelectric substrate. High frequency electrical power

EFFICIENCY OF SURFACE GENERATED BULK ACOUSTIC WAVES IN ROTATED Y-CUTS OF

by Y. W. Zhang
"... Résumé- Nous étudions les ondes acoustiques rayonnées par un transducteur interdigité dans le volume d'un substrat piézoélectrique. Des diagrammes de rayonnement dans des coupes de LiNbÛ3 sont présentés ainsi que leurs vitesses de propagation et angles du flux d'énergie. L'effet d&apo ..."
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flow angles of deep bulk acoustic waves radiated by an interdigital transducer in several LiNbC»3 substrates. Anisotropy effect on the radiation patterns and the coupling between bulk waves and leaky surface waves are analyzed. Optimum cuts for designing a specified device are proposed and general

The Effect Of Electrodes On The Surface Acoustic Wave Propagation In Elastic Solids

by Ji Wang, Jingbo Lin, Yongping Wan, Zheng Zhong
"... Electrodes on the surface of an elastic substrate have important effects on the surface acoustic wave (SAW) propagation, and related changes like wave velocity and mode shapes due to the presence of electrodes should be considered in the analysis so the information available to practical application ..."
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acoustic wave propagation, we can extend the results to discontinuous periodic electrodes, or the interdigital transducers (IDTs), for better estimation of the effect on wave velocity and mode shapes. In a manner similar to our previous work on bulk acoustic wave resonators, simple but effective concepts

RF-Activated Standing Surface Acoustic Wave for On-Chip Particle Manipulation

by Jinhong Guo, Joshua L. W. Li, Yu Chen, Leslie Y. Yeo, James R. Friend, Yuejun Kang
"... Abstract—On-chip flow cytometry provides a powerful tool to characterize cell samples for point-of-care diagnosis. In particular, sample focusing at specific locations along the microchannel is crucial to ensure the accuracy of detection. In this paper, we present a simple strategy of interfacing an ..."
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an RF-activated standing surface acoustic wave (SSAW) substrate with a microfluidic channel, and use this device to study the dynamic process of particle aggregation along the microchannel. Specifically, the SSAW generated by two parallel interdigital transducers induces an acoustic radiation force
Results 1 - 10 of 92