Surface acoustic waves
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The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted full papers will be peer reviewed. Accepted high quality papers will be presented in oral and poster sessions,will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE.
The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.
The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.
The ICASSP meeting is the world's largest and most comprehensive technical conference focused on signal processing and its applications. The conference will feature world-class speakers, tutorials, exhibits, and over 50 lecture and poster sessions.
All fields of satellite, airborne and ground remote sensing.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...
The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...
Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...
The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes
1979 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1979
1994 Proceedings of IEEE Ultrasonics Symposium, 1994
In this report we develop investigations which have been made to study the energy distribution of different types of surface acoustic waves in several devices using quartz and lithium niobate. The observations were performed with X-ray topographs obtained by the use of the synchrotron radiation. The time structure of the X-rays has permitted stroboscopic observations of the amplitude and phase ...
1976 International Electron Devices Meeting, 1976
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1995
Surface-acoustic-wave (SAW) measurement techniques can be effectively used to determine the acoustic properties of dielectric and piezoelectric films. Such films can be used for the development of semiconductor-integrated microwave- frequency surface and bulk acoustic wave devices. The acoustic properties of silicon nitride, silicon oxynitride, silicon carbide, and TEOS glass, deposited by plasma-enhanced chemical-vapor-deposition (PECVD) on GaAs, have been characterized using ...
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 1995
If spurious bulk-waves are radiated from the launching interdigital transducers (IDT's) in surface acoustic wave (SAW) devices, it is possible to reduce bulk-wave responses by steering the beams out of the receiving IDT by use of the difference of power flow angles (PFA's) between SAWs and bulk- waves. The spurious bulk wave suppression scheme is clarified. A new crystal cut ...
Flying a Helicopter with Brain Waves - CES 2013
Lighting the Way: Optical Sensors in the Life Sciences
Yamaha's Avant Grand Digital Piano Mimics Acoustic
Brooklyn 5G Summit: Tactile Internet: mm-Waves versus cm-Waves
NeuroGrid: Recording action potentials and large-scale network activity from the surface of the brain - IEEE Brain Workshop
IMS 2011 Microapps - A Multi-Level Conductor Surface Roughness Model
Probing the Universe with Gravitational Waves - Applied Superconductivity Conference 2018
Signal Processing and Machine Learning
Quantum Computation - ASC-2014 Plenary series - 4 of 13 - Tuesday 2014/8/12
IMPASS: Intelligent Mobility Platform with Active Spoke System
Life Sciences: Surface Enhanced Raman Spectroscopy, and more
Brooklyn 5G Summit 2014: Unleashing Millimeter-Wave Frequency by Andreas Roessler
IEEE Magnetics Distinguished Lecture - Mitsuteru Inoue
Capturing Sound with Smoke and Lasers
Contactless Wireless Sensing - Shyam Gollakota - IEEE EMBS at NIH, 2019
3D Body-Mapping for Severely Burned Patients - Julia Loegering - IEEE EMBS at NIH, 2019
Brooklyn 5G Summit: Going the Distance with CMOs: mm-Waves and Beyond
Brooklyn 5G - 2015 - Ali M. Niknejad - Going the Distance with CMOS: mm-Waves and Beyond
Radio Astronomy: The Impact of Bose’s Invention - Yashwant Gupta - IEEE India
In this report we develop investigations which have been made to study the energy distribution of different types of surface acoustic waves in several devices using quartz and lithium niobate. The observations were performed with X-ray topographs obtained by the use of the synchrotron radiation. The time structure of the X-rays has permitted stroboscopic observations of the amplitude and phase distributions of the Rayleigh waves across the devices. Bragg and Laue patterns were obtained in order to analyse the components of the displacements. The most important results concern the interactions between the dislocations and the SAW
Surface-acoustic-wave (SAW) measurement techniques can be effectively used to determine the acoustic properties of dielectric and piezoelectric films. Such films can be used for the development of semiconductor-integrated microwave- frequency surface and bulk acoustic wave devices. The acoustic properties of silicon nitride, silicon oxynitride, silicon carbide, and TEOS glass, deposited by plasma-enhanced chemical-vapor-deposition (PECVD) on GaAs, have been characterized using linear arrays of SAW interdigital electrodes operating in the harmonic mode over the frequency region from 30 MHz to above 1.0 GHz. The elastic constants of these amorphous films have been determined by fitting theoretical dispersion curves to the measured SAW velocity characteristics. Frequency-dependent SAW propagation-loss values have been determined from the observed linear change in loss as a function of transducer separation. Preliminary measurements of the temperature coefficient of frequency (TCF) for SAW propagation of the films on GaAs are also given.<<ETX>>
If spurious bulk-waves are radiated from the launching interdigital transducers (IDT's) in surface acoustic wave (SAW) devices, it is possible to reduce bulk-wave responses by steering the beams out of the receiving IDT by use of the difference of power flow angles (PFA's) between SAWs and bulk- waves. The spurious bulk wave suppression scheme is clarified. A new crystal cut with excellently suppressed bulk-wave responses using this scheme is located for quartz.<<ETX>>
Although surface acoustic wave (SAW) devices using quartz and LiNbO<sup>3</sup> have proven highly successful, manufacturability would be considerably eased if SAW devices could be readily integrated with semiconductor devices. In a recent paper, Lee et al. proposed Mg-doped epitaxial GaN as suitable for SAW devices integrated with other III-V materials. The piezoelectric constant, or electromechanical coupling factor (k<sub>2</sub>), is one important parameter determining the acoustic behavior of a material. A large k<sub>2</sub> eases the design of wide-bandwidth low- loss SAW transducers. The piezoelectric constants are also of great interest in the design of strained-layer devices. For Mg-doped GaN, Lee et al. found k<sub>2</sub> = (4.3 plusmn 0.3)%. If confirmed, this would represent one of the highest values of k<sub>2 </sub> ever reported, and would revolutionize the design of acoustic devices integrated with III-V materials, since other III-V materials have much smaller k<sub>2</sub>. For example, GaAs has k<sub>2</sub> = 0.04%
The coupling-of-modes (COM) formalism is extended to include coupled transducers and applied to the modelling of surface acoustic wave (SAW) coupled resonator filters. The models do not require the derivation of equivalent circuits and they accommodate finger reflections, electromagnetic feedthrough and external matching circuits. Frequency responses for waveguide- coupled devices are computed and compared to experimental results. Longitudinal mode profiles within the resonant cavities are presented.<<ETX>>
Frequency spectra of multi-layer Al-AlN FBAR resonator are calculated. It is shown, that plurality of frequency spectra can be obtained by various combinations of quantities of layers and their thickness. Each spectrum is individual and can be used for remote identification similar to SAW tags.
Surface Acoustic Wave (SAW) devices, are not normally amenable to simulation through circuit simulators. In this letter, an electrical macromodel of Mason's Equivalent Circuit for an interdigital transducer (IDT) is proposed which is compatible to a widely used general purpose circuit simulator SPICE endowed with the capability to handle negative capacitances and inductances. Illustrations have been given to demonstrate the simplicity of ascertaining the frequency and time domain characteristics of IDT and amenability to simulate the IDT along with other external circuit elements.<<ETX>>
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