Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"SAW devices"”.
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Lithium niobate thin films on diamond substrates for SAW devices
… magnetron sputtering. The surface acoustic wave (SAW) characterizations of the multilayer lithium niobate/diamond/silicon are calculated. The lithium niobate thin films as well as the diamond/silicon substrates are structurally analyzed using techniques such as Bragg X-ray diffraction, scanning …
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Design, Analysis And Implementation Of Orthogonal Frequency Coding In Saw Devices Used For Spread Spectrum Tags And Sensors
SAW based sensors can offer wireless, passive operation in numerous environments and various device embodiments are employed for retrieval of the sensed data information. Single sensor systems can typically use a single carrier frequency and a simple device embodiment, since tagging is not …
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Group III-nitride devices and applications
… focuses on developing group III-nitride based devices for novel applications.;GaN is a robust, chemically inert, piezoelectric material, making it an ideal candidate for surface acoustic wave (SAW) devices designed for high temperature and/or harsh environment sensors. In this work, SAW devices …
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Development and evaluation of an acylating agent detector using surface acoustic wave devices
… a highly desirable goal. Surface Acoustic Wave (SAW) devices have been used for chemical analysis since 1978. While sensitive to mass changes occurring on their surfaces, they are not selective to the mass they will detect. Their use as chemical sensors requires the development of specificity for …
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Real-time 3-d localization using radar and passive surface acoustic wave transponders
… this system is included. Surface acoustic wave (SAW) device design and modeling is covered with particular attention paid to implementation of passive transponders. A method under development to fabricate SAW devices with features as small as 300nm is then covered in detail. The electronic design …
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Surface acoustic wave devices with low loss and high frequency operation
… trends in the use of surface acoustic wave (SAW) devices are reviewed. As a result, three areas not previously addressed by STC were identified: lower insertion loss designs, higher operating frequencies and improved temperature dependent stability. A review of the temperature performance of …
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Películas delgadas de nitruro de aluminio depositadas por pulverización y su aplicación a dispositivos de ondas acústicas
… dispositivos de ondas acústicas de superficie (SAW) con aplicaciones en electrónica de radiofrecuencia. La técnica que se ha empleado para el depósito de las películas de nitruro de aluminio es la pulverización reactiva de radiofrecuencia; se trata de una técnica muy versátil y de uso común en …
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Design and fabrication of a prototype aluminum nitride-based pressure sensor with finite element analysis and validation
… on Aluminum Nitride (AlN) Surface Acoustic Wave (SAW) and Shear Horizontal (SH)-SAW. This AlN-based device has unique superiority over other SAW devices, including relatively lower cost, higher sensitivity, intrinsically higher reliability, more compact size, and faster response. In this novel …
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Acoustoelectric charge transport in quasi-one-dimensional systems
… frequency locked to an external potential. Such devices are expected to form the basis of a standard of electric current, long sought after by the metrological community, to provide a representation of the ampere and to be compared with existing quantum standards of the volt and ohm. This thesis …
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Surface Acoustic Waves Propagation and Coupling Fields in Piezomagnetic and Piezoelectric Semiconductor Layered Structures
… the needs of the rapid development of electronic devices. In recent years, the research on multi-field coupling behaviors and waves modulation of PSs has become one of the hot topics. By integrating multiferroic materials with PSs, new magnetically regulated composite devices such as magnetically …