Download or read book Surface Acoustic Wave Probing with Spaced Interdigital Transducers written by Stanford University. Ginzton Laboratory and published by . This book was released on 1976 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have found that interdigital surface acoustic wave (SAW) transducers deposited on glass substrates and positioned very close to a piezoelectric crystal delay line surface (spaced transducers) may be used to simulate identical transducers fabricated directly on the surface, for pretesting and prealignment of SAW devices. A novel spaced transducer mounting technique has been developed that utilizes a free floating gimbal, which permits positioning the spaced transducer substrate next to the delicately polished SAW substrate without any mutual wiping. This feature greatly extends the reliability of the spaced transducer and overcomes the problem of damaging the surface polish. The gimbal mechanism is mounted on a mobile support which assures good positioning and orientation accuracy. A number of important uses for the new spaced transducer configuration in connection with surface acoustic wave delay line simulation are described, and a brief treatment of the electrical and coupling properties of spaced transducers is also presented. (Author).

Download or read book Optical Probing of Surface Acoustic Wave Generation Under Interdigital Transducers written by P. J. Vella and published by . This book was released on 1973 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-resolution optical spectroscopy was used to study the growth of continuously excited surface acoustic waves under 15- and 25-finger-pair aluminum interdigital transducers on 7-cut z-propagating lithium niobate. The observed exponential growth of the surface wave with distance is in agreement with simple coupled-mode theory. The coupling parameter leads to a direct evaluation of the effective electromechanical coupling constant K. For yz LiNbO3 a value of K squared = 0.030 plus or minus 0.003 was found. (Author).

Download or read book A Perturbative Analysis of Surface Acoustic Wave Propagation and Reflection in Interdigital Transducers written by Carsten H. Thoma and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Signal Processing with Surface Acoustic Wave Delay Lines of Large Bandwidth and Delay written by C. M. Fortunko and published by . This book was released on 1975 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Large Time bandwidth Product Surface Acoustic Wave Delay Lines written by Stephen Leslie Quilici and published by . This book was released on 1974 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research on Devices Using Acoustic Surface Waves written by Stanford University. Microwave Laboratory and published by . This book was released on 1970 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Surface Wave Research written by Stanford University. Microwave Laboratory and published by . This book was released on 1971 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Surface Wave Research Second Report written by Stanford University. Microwave Laboratory and published by . This book was released on 1972 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Surface Wave Devices for Signal Processing written by D.P. Morgan and published by North Holland. This book was released on 1985 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have seen the emergence of a wide variety of electronic devices making use of surface acoustic waves in solids. This book focusses on the devices of greatest current interest and on the principles underlying them. An introductory survey is followed by chapters on acoustic wave fundamentals, electric excitation, transducers, multi-strip couplers and propagation effects. The interdigital transducer is emphasised since it is a key element in most devices. The remaining chapters - about half of the book - describe practical devices including delay lines, bandpass filters, chirp filters for pulse-compression radar (including reflective array compressors), convolvers and oscillators. For the main devices the text includes design principles, second-order effects, practical performance and, where appropriate, the role of the device in system applications. Some of the more mathematical details are relegated to Appendices, which include electrode interactions in transducers, sampling theory, the electrostatic element factor and the required relationships from Fourier analysis. A classified list of over 500 references is provided.The book will be of interest to engineers developing surface-wave devices, and to those using the devices in practical systems. It is also very suited for university courses or research work.

Download or read book Surface Acoustic Wave Probing of Ceramics written by Julia Ju-Wen Tien and published by . This book was released on 1983 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Surface Acoustic Wave Devices in Telecommunications written by Ken-Ya Hashimoto and published by Springer Science & Business Media. This book was released on 2000-06-21 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface acoustic wave (SAW) devices are widely used in mobile communications, a rapidly evolving market. This book gives an overview on the latest SAW technologies with an emphasis on the design and simulation of devices, such as resonator-based devices employing the SH-type leaky SAW.

Download or read book Surface Acoustic Wave Devices written by Supriyo Datta and published by Prentice Hall. This book was released on 1986 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Surface Wave Diffraction and Beam Steering written by Thomas L. Szabo and published by . This book was released on 1973 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report contains a detailed description of diffraction in acoustic surface wave devices. This source of loss is highly important in the design and realization of bandpass filters, long time delay lines and other devices for electronic sensors and communications systems. A complete review of acoustic surface wave diffraction on anisotropic substrates is presented. Full experimental verification of theory is provided. Complete computer program listings and descriptions are provided. The limits of applicability of the parabolic velocity surface theory are quantitatively delineated. Universal diffraction loss design curves are given for all parabolic materials. A limitation in the use of the exact angular spectrum of waves theory occurs for materials having a power flow angle slope approximately - 1 unless the velocity surfaces are very accurately known. Both YZ LiNbO3 and 16-1/2 degree double rotated LiNbO3 fall in this category. Approximate diffraction loss design curves are given for YZ LiNbO3. A complete tabular summary of all important material properties affecting acoustic surface wave device design is included. (Author).

Download or read book A Perturbative Analysis of Surface Acoustic Wave Propagation and Reflection in Interdigital Transducers written by Carsten H. Thoma and published by . This book was released on 1997 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Creating and Imaging Surface Acoustic Waves on GaAs written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The versatility of surface acoustic wave (SAW) devices stems from the accessibility of the propagation path to modification and detection. This has led to the integration of SAWs in a variety of novel fields, including quantum information processing. The development of technologically competitive devices requires the use of gigahertz frequency SAWs. This thesis develops fabrication processes for high frequency interdigital transducers on gallium arsenide. Optically lithography was used to create linear and stepped transducers, with a minimum feature size of 2 um, that were driven at their fifth harmonic. The highest frequency achieved was 1435 MHz, but the power absorbed was less than 3% and insertion losses were greater than -80 dB. Further improvements in the design and fabrication are required if optically fabricated transducers are to be an alternative to transducers with narrower finger widths. Electron-beam lithography techniques were developed and used to create transducers with finger widths of 500 and 400 nm, with fundamental resonance frequencies of 1387 and 1744 MHz, respectively. The power absorbed was 3 to 6% with insertion losses greater than -45 dB. The performance characteristics can be improved by the removal of residual resist on the surface of the transducer. An indispensable tool for the characterization of one-port transducers is an all optical probe to measure the displacement field of a SAW. This work details the design and construction of a scanning Sagnac interferometer, that is capable of measuring the outward displacement of a surface. The spatial resolution of the interferometer was 2.4 +/- 0.2 um and the displacement sensitivity was determined to be 4 +/- 1 pm. The instrument was used to map the SAW displacement field from a 358 MHz transducer, with results showing the resonant cavity behaviour of the fingers due to Bragg reflections. It also allowed for the direct detection of the SAW amplitude as a function of the driving frequency of.

Download or read book Single Interdigital Transducer as Surface Acoustic Wave Impedance Sensor written by V. H. Nguyen and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: