The Penn State Research Foundation

Jose A Kollakompil

Vijay K Varadan

Vasundara V Varadan

Pascal B Xavier

William D Suh

Kalarickaparambil Vinoy

A gyroscope comprises a piezoelectric substrate having a surface. Disposed on the surface are a resonator transducer, a pair of reflectors, a structure such as a metallic dot, and a sensor transducer. The resonator transducer creates a first surface acoustic wave on the surface. The pair of reflectors reflects the first surface acoustic wave to form a standing wave within a region of the surface between the pair of reflectors. The structure is disposed on the surface within the region, wherein a Coriolis force acting upon the structure creates a second surface acoustic wave. The sensor senses the second surface acoustic wave and provides an output indicative thereof.

Method for making a micro-electro-mechanical gyroscope

A class of antennas that comprise an electrically conductive fractal pattern disposed on a dielectric substrate and are capable of construction in a size measured in centimeters as compared to previous antennas of the same class that measured in meters. One antenna style has a ground plane that is perpendicular to the substrate and another style has a ground plane that is parallel to the substrate. The substrate has a dielectric constant of in the range of about 10 to 600 or more and may be a ferroelectric, such as barium strontium titanate. A bias voltage applied across the substrate can tune the antenna for operation in a particular frequency range. The antenna can be made especially wideband by placing an absorbing material behind the substrate. The fractal pattern may be any fractal pattern, such as Hilbert curve, Koch curve, Sierpinski gasket and Sierpinski carpet. One style of the antenna uses a fractal pattern that has a plurality of segments arranged in a first configuration and a switch disposed to alter the first configuration to one or more other configurations. The antenna elements may also be arranged in a phased array.

Miniaturized conformal wideband fractal antennas on high dielectric substrates and chiral layers

Micro-electro-mechanical gyroscope

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State College, PA, United States of America

Jose A Kollakompil