Petkie
Douglas T. Petkie, Dayton, OH US
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20100241009 | Systems and Methods for Detecting Movement of a Target - A system is disclosed for wirelessly detecting movement of a target. The system comprises a reference oscillator, a transmitter, a receiver, a demodulator, and a processor, wherein: the reference oscillator generates references frequencies for the transmitter, the receiver, and the demodulator; the transmitter generates a continuous-wave signal at a frequency based on the transmitter reference frequency and wirelessly transmits it to the target; the receiver wirelessly receives a reflected signal from the target having a phase angle corresponding to movement of the target and converts the reflected signal into an intermediate frequency signal based on the receiver reference frequency; the demodulator demodulates the intermediate frequency signal into an in-phase component and a quadrature component; and the processor converts the in-phase component and the quadrature component into a movement signal corresponding to movement of the target. | 09-23-2010 |
Ronald Petkie, Thousand Oaks, CA US
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20090242021 | SOLAR CELL WITH COLORIZATION LAYER - Colorization of a solar cell is achieved by modifying a layer proximate an active layer of the solar cell. The color attribute may be obtained by selecting one or more narrow bands of wavelengths in the visible color spectrum to be reflected from the surface of the solar cell unit that results in a specific color or combination of colors at various angles. The spectrum of light reflected from the active solar cell area is controlled through the use of filters that reflect only limited portions of the spectrum, thereby minimizing the effect of reflected light on the overall efficiency of the solar cell. | 10-01-2009 |
20120006382 | THIN AND FLAT SOLAR COLLECTOR-CONCENTRATOR - A photonics-based planar solar concentrator designed for collecting and guiding insolate radiation from one side to solar cells for energy conversion on another side is described. The planar solar concentrator consists of two sections. The top section is a matrix of micro-size wide angle solar concentrators. The bottom section is a planar lightwave circuit, which may be multi-layered. Planar lightwave circuits are used within a relatively thin cross-sectional thickness to guide light from micro-concentrators to output apertures on the opposite surface, such that solar cells can be located directly underneath the concentrator. The planar concentrator can deliver multiple times the normal sunlight intensity to standard silicon solar cells, thereby decreasing the number of cells required in a typical solar module. This planar solar concentrator is designed for use as the top optical layer of a standard flat panel solar module. The concentrator collects light from a relatively wide angle of incidence, and can therefore eliminate the need for active tracking. | 01-12-2012 |
Ronald Petkie, Albuquerque, NM US
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20090211620 | CONFORMAL SOLAR POWER MATERIAL - A solar cell mesh includes multiple strips of flexible photovoltaic conversion cells disposed in a first direction. Multiple strips of flexible material are intertwined with the multiple strips of flexible photovoltaic material at least somewhat orthogonal to the first direction to form the mesh, such as in a fabric or net. The mesh may be applied to a curved surface of the device and encapsulated such that the mesh is conformal with the curved surface of the device. | 08-27-2009 |
Ronald R. Petkie, Fort Collins, CO US
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20140315345 | Methods For Thick Films Thermoelectric Device Fabrication - Solid state thermoelectric energy conversion devices can provide electrical energy from heat flow, creating energy, or inversely, provide cooling through applying energy. Thick film methods are applied to fabricate thermoelectric device structures using microstructures formed through deposition and subsequent thermal processing conditions. An advantageous coincidence of material properties makes possible a wide variety of unique microstructures that are easily applied for the fabrication of device structures in general. As an example, a direct bond process is applied to fabricate thermoelectric semiconductor thick films on substrates by printing and subsequent thermal processing to form unique microstructures which can be densified. Bismuth and antimony are directly bonded to flexible nickel substrates. | 10-23-2014 |