IEEE 1988 school papers

Microwave filters based on coupled MSW resonators and their applications: A novel and simple technique for realizing tunable and planar microwave bandpass filters has been investigated. The use of coupled magnetostatic wave (MSW) resonators for realizing these filters is demonstrated. Due to their low magnetic losses, epitaxially grown single-crystal yttrium iron garnet (YIG) films are used for the MSW propagation. The i....; Authors:Hanna;S.M.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Ultrasonic motors: An ultrasonic motor is proposed which uses two piezoelectric elements in the stator. One element is used to generate a vibration polarized with respect to the direction of motion of the rotor or the slider. The other one generates a vibration perpendicular to the motion of the rotor. By imaging the ratio of the vibration amplitudes and the phase, t....; Authors:Ueha;S.;Kurosawa;M.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Practical ultrasonic spectrometric measurement of solution concentrations by a tracking technique: The authors designed and tested a practical measurement technique for solutions, based on a resonator with enclosed piezoceramics which can operate at a resonant frequency mode around 500 kHz. The resonance can be tracked automatically by means of a phase-locked loop. The authors report measurements made on water-methanol mixtures, showing that con....; Authors:Dion;J.L.;Barwicz;A.;Bouchard;J.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Ultrasonic techniques for measurement of coal slurry viscosity: The authors present a technical evaluation of ultrasonic methods as applied to the measurement of slurry viscosity. The four ultrasonic techniques examined were measurement of attenuation, acoustic impedance, relaxation, and acoustic streaming and cavitation. Acoustic impedance measurements are more sensitive to slurry viscosity than to any other f....; Authors:Sheen;S.H.;Reimann;K.J.;Lawrence;W.P.;Raptis;A.C.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Analysis of liquid-phase-based sensors utilizing SH surface waves on rotated Y-cut quartz: Surface shear horizontal (SH) wave propagation at the boundary of rotated Y-cut quartz with a viscous fluid is theoretically analyzed for liquid-phase-based sensor applications. Analytical expressions are obtained for the fractional velocity change and attenuation coefficient in terms of the material constants, liquid viscosity and density, and wav....; Authors:Shana;Z.;Josse;F.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Use of SAW devices to monitor viscoelastic properties of materials: Preliminary data are presented which demonstrate the potential sensitivity of SAW (surface acoustic wave) to the elastic properties of polymer coatings. 158-MHz dual SAW devices were used to demonstrate the sensitivity of the SAW to changes in coating elastic properties, and to identify the T/sub g/ and/or T/sub m/ of several polymer coatings. Data....; Authors:Ballantine;D.S.;Jr.;Wohltjen;H.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Surface acoustic wave H/sub 2/ sensor on silicon substrate: A surface acoustic wave (SAW) hydrogen sensor implemented on a silicon substrate is presented. The device is based on the changes produced in the phase velocity of SAWs propagating along a multilayered Pd/ZnO/SiO/sub 2//Si structure by H/sub 2/ absorption and desorption in the selectively sorbent Pd film. Several devices have been made and tested. ....; Authors:Caliendo;C.;D'Amico;A.;Varadi;P.;Verona;E.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Microscale mechanics for sensors and actuators: Microscale mechanical structures have been conceived and fabricated that make possible a wide variety of microsensors and microdynamical moving elements. Miniature sensors and microscopic moving elements on a chip are made by standard integrated-circuit fabrication techniques, augmented with special etches and deposited films. An integrated audio m....; Authors:White;R.M.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Gyrator-type equivalent circuit for piezoelectric transducers: The authors consider piezoelectric transducers operating in the thickness vibration mode, and with the electric field parallel to the motion. It is shown that if the development of the equivalent circuit for the transducers is based on the dielectric constant for constant stress, the static capacitance is defined for free-running transducer conditi....; Authors:Flachenecker;G.;Sauerborn;A.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

Acousto-optic modulators for optical fibers using Hertzian contact with a grooved transducer substrate: The authors describe acousto-optic modulators for optical fibers, fabricated by the deposition of thin zinc-oxide transducers onto specially lapped glass capillary tubes. By exposing the inner surface of the capillary and contacting it to an optical fiber of the same diameter, a good Hertzian contact can be easily attained, providing efficient thro....; Authors:Patterson;D.B.;Godil;A.A.;Kino;G.S.;Khuri-Yakub;B.T.Publisher:Ultrasonics Symposium;1988. Proceedings.;IEEE 1988Conference Date:2-5 Oct. 1988ISSN:Total Page:2 vol. 1113

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