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New Piezoelectric Substrates for SAW Devices
International Journal of High Speed Electronics and Systems, 2000Recent developments in single crystal piezoelectric materials have focused on the search for "ideal" materials with zero temperature coefficient of frequency orientations featuring jointly high piezoelectric coupling, high intrinsic Q, zero power flow angle, and minimized diffraction effects.
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SAW device application of diamond
Proceedings of 1995 Japan International Electronic Manufacturing Technology Symposium, 2002Polycrystalline diamond has emerged as a very promising material for high frequency surface acoustic wave (SAW) devices because it has a highest acoustic wave velocity amongst all materials. Theoretical studies with various types of piezoelectric materials were also performed.
S. Shikata +6 more
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Frequency trimming of SAW devices
Proceedings of IEEE Ultrasonics Symposium ULTSYM-94, 1994This paper describes a frequency trimming technique suitable for GHz band SAW devices. A frequency shift was obtained by forming grooves on the substrate surface using an RF reactive sputter etching technique. Because the center frequency of a SAW transducer in a GHz band is very sensitive to the groove depth, a precise control of the etched amount is ...
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General Green's functions for SAW device analysis
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1999The traditional Green's function has been widely used to analyze surface acoustic wave (SAW) devices for many years because of its physical basis and its ability to model many propagating modes. Simplifications are, however, introduced in the derivation of the traditional Green's function that cause it to ignore some important effects, such as mass ...
D, Qiao, W, Liu, P M, Smith
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Fine lithography and saw devices
Microelectronic Engineering, 1984Abstract High performance filters in GHz range are required in communication systems. In this paper, the fine electrodes of the order or 0.2 μm width have been fabricated by using electron beam litho-graphy, normal lift-off techniques and O 2 -plasma cleaning system.
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New architectures for feedthrough SAW recursive devices
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2005This paper presents an analysis of a new type of feedthrough recursive surface acoustic wave (SAW) device. The device combines a conventional SAW structure with positive feedback in a way that allows use of selective properties of the SAW structure, control of the central frequency and bandwidth, achieving significantly higher quality factors for given
Alexander N, Kalashnikov +1 more
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SAW devices for communications applications
Canadian Journal of Electrical and Computer Engineering, 1990The market for surface acoustic wave (SAW) devices now exceeds $100 million. The author presents an overview of the different SAW device structures available and summarizes their properties. He then describes a number of applications related to the communications industry, including general bandpass filters, Nyquist filters, clock recovery filters ...
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Diamond‐SAW devices: a reverse fabrication method
physica status solidi c, 2016AbstractSurface acoustic wave (SAW) devices are key components in modern wireless communication systems. Besides being used as reflective delay lines, filters or resonators, SAW devices can be used as sensors and fixed‐code identification tags. Due to their high‐acoustic velo‐city, diamond films can be combined with piezoelectric materials to fabricate
Debarati Mukherjee +8 more
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Optimal orientation function for SAW devices
IEEE International Frequency Control Sympposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003, 2004The traditional electromechanical coupling coefficient (K/sup 2/) and temperature coefficient of delay (TCD); more recently velocity (v/sub p/), for compact or high frequency devices; and now power flow angle (PFA), diffraction (/spl gamma/), amplitude (|/spl Gamma/|) and phase (/spl ang//spl Gamma/) of a metal strip reflection coefficient are equally ...
J.A. Cowperthwaite, M.P. da Cunha
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SAW devices for communication systems
Proceedings., IEEE Ultrasonics Symposium, 2003The author considers the possibilities of software engineering for the development, modeling, and design of full-custom, high-precision SAW (surface acoustic wave) filters for communication systems, e.g. GHz delay lines for clock recovery in light-wave transmission systems low-loss filters for mobile radios and cordless telephones, spectrum-shaping ...
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