Search Results - electrical

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Monolithic High Voltage Impulse Amplifier Using HBT
SUMMARY Lehigh University has developed a method for circuit design for amplifying short impulses using monolithic HBT technology. HBT has the desirable characteristics of high transit frequency (fT) and breakdown voltage for the generation of high power at radio and microwave frequencies. In normal operation the generated power is lower than e...
Published: 2/14/2013   |   Inventor(s): James Hwang, Subrata Halder, Renfeng Jin
Keywords(s): Communications, Electrical
Category(s): Electronics
Internal Microlens Arrays Enhancing Performance of Dye Sensitized Solar Cells
SUMMARY Existing solar cell devices only control light outside of the device as a top-layer coating or solar collector. This invention from Lehigh University incorporates the lenses within the device itself. The microlens arrays redistribute the light internally and increase the exposed surface area associated with the dye support. This method fo...
Published: 11/6/2012   |   Inventor(s): James Gilchrist, Mark Snyder, Pisist Kumnorkaew
Keywords(s): Efficiency Enhancement, Electrical
Category(s): Electronics, Energy and Environment
Fabrication of Low-Loss Silicon-on-Insulator Optical Waveguides
SUMMARY Disclosed is a method of fabricating an optical waveguide device including the steps of forming a mask over a waveguide core material layer so as to leave a portion of the layer exposed, and exposing the structure to an oxidizing environment to form an oxide layer on the waveguide core material layer at least in the exposed portion thereby ...
Published: 3/16/2009   |   Inventor(s): Thomas Koch, Robert Pafchek, Mark Webster
Keywords(s): Electrical, High Quality Optics
Category(s): Electronics