Surface acoustic wave devices
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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.
To promote awareness, understanding, advancement and application of ocean engineering and marine technology. This includes all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.
The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power
The conference covers all aspects of the technology associated with ultrasound generation and detection and their applications.
The IEEE Sensors Conference is a forum for presentation, discussion, and exchange of state-of-the art information including the latest research and development in sensors and their related fields. It brings together researchers, developers, and practitioners from diverse fields including international scientists and engineers from academia, research institutes, and companies to present and discuss the latest results in the general field of sensors.
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
Provides leading edge information that is critical to the creation of reliable electronic devices and materials, and a focus for interdisciplinary communication in the state of the art of reliability of electronic devices, and the materials used in their manufacture. It focuses on the reliability of electronic, optical, and magnetic devices, and microsystems; the materials and processes used in the ...
Publishes original and significant contributions relating to the theory, design, performance and reliability of electron devices, including optoelectronics devices, nanoscale devices, solid-state devices, integrated electronic devices, energy sources, power devices, displays, sensors, electro-mechanical devices, quantum devices and electron tubes.
Theory and applications of industrial electronics and control instrumentation science and engineering, including microprocessor control systems, high-power controls, process control, programmable controllers, numerical and program control systems, flow meters, and identification systems.
1994 Proceedings of IEEE Ultrasonics Symposium, 1994
The relative fraction r of the elastic energy of an acoustic mode localized in a supported film is shown to play an important role in some applications of layered structures such as electroelastic effect, gas sensing and acoustic characterization. Computer simulation of the parameter r as a function of the film thickness normalized to the acoustic wavelength is performed for ...
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
1979 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1979
IEEE 1986 Ultrasonics Symposium, 1986
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The relative fraction r of the elastic energy of an acoustic mode localized in a supported film is shown to play an important role in some applications of layered structures such as electroelastic effect, gas sensing and acoustic characterization. Computer simulation of the parameter r as a function of the film thickness normalized to the acoustic wavelength is performed for different possible material combinations in accordance with Farnell-Adler's scheme. Some general features of the parameter r are discussed. Measurements of acoustic attenuation and temperature coefficient of delay, are shown to correlate with the behavior of this parameter for Rayleigh and Sezawa modes and for both conditions of slow film on fast substrate and fast film on slow substrate. The analysis and experiments have been carried out on layered structures made of AlN and ZnO films on glass, fused quartz, and Si substrates
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
There has been a historical trend to reduce feature sizes in solid-state devices and circuits to improve performance and achieve higher packing density. The fundamental limits and practical problems associated with smaller features will be examined, citing the impact of emerging pattern generation technologies, such as electron-beam and x-ray lithography, on circuits with features below 1 μm.
This paper proposes a focusing method based on multiple scanning of a device surface to be observed, which is particularly-suitable for a fast-mechanical- scanning and phase-sensitive laser probe for radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices. When high spatial resolution is required for the observation, one needs an objective lens of large magnifying power with extremely shallow focal depth. Accordingly, an uneven surface and tiny inclination of a BAW device cause acquired images a considerable defocus, by which it is difficult to obtain precise and reliable field quantities related to acoustic waves in the device. The proposed method is shown to be most effective in avoiding this sort of defocus and able to focus the entire surface. By this method, for example, we could clearly observe power leakage in an FBAR structure.
This paper describes a focus adjustment system particularly designed for the fast-mechanical-scanning and phase-sensitive laser probe for radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices. When high spatial resolution is necessary for the observation, one needs an objective lens of large magnifying power with extremely shallow focal depth. Then a tiny inclination of a measurement device may cause severe defocus resulting in blurred images. We installed the focus adjustment system in the laser probe, and showed that even there is the inclination, high quality information of the wave field can be acquired without slowing down the scanning speed. The laser probe with the focus adjustment function is applied to the characterization of RF SAW devices operated in 2 GHz range. It is shown the spatial resolution better than 0.5 mum is obtainable.
In this paper, we discuss the nonlinear performance difference between surface acoustic wave (SAW) and bulk acoustic wave (BAW) resonators, which are inter- modulation-distortion (IMD) and triple-beat (TB) products, and indicate the importance to reduce even-order nonlinearity of BAW resonator. Then, we were able to validate the accuracy and efficiency of our proposed simulation technique on BAW devices by comparing our simulation with experimental data. We verified that our circuit model is a high-performance tool that can be used to predict BAW device nonlinearities. Finally, we produced the thin film bulk acoustic resonator (FBAR) duplexer with highly linear performances for wideband code division multiple access (WCDMA) band 1.
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