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Dot-in-Well Quantum-Dot Infrared Photodetectors
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Date added: 02/01/2008 |
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We are developing DWELL-QDIPs based on InGaAs QDs embedded in the lattice-matched GaAs/AlGaAs materials system, in which we have extensive experience in growth and fabrication of FPAs. Using this lattice-matched materials system we should be able to stack 50-100 InGaAs QDs in a GaAs/AlGaAs DWELL device structure. Therefore, we expect at last an order of magnitude higher quantum efficiency and responsivity from InGaAs/GaAs/AlGaAs DWELL-QDIPs
compared to lattice mismatched InGaAs/InGaAs/GaAs DWELL-QDIPs. |
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Increasing Discharge Capacities of Li-(CF)n Cells
hot!
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Date added: 02/01/2008 |
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Increasing the discharge capacity of Li-(CF)n batteries, while maintaining high practical specific energy, would open new applications for these battery cells. This issue is addressed here. |
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Integrated Microbatteries for Implantable Medical Devices
hot!
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Date added: 02/01/2008 |
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This innovation proposes to use the device housing the tube to also be the main battery package to maximize energy density while minimizing excess packaging materials. The battery will use a liquid electrolyte consisting of a Li-based salt and appropriate solvent. |
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High Power Amplifier and Power Supply
hot!
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Date added: 01/02/2008 |
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The uniqueness is of this application is:
(a) fast focus modulator, (b) generation of -20 kV voltage containment, (c) powering and protecting a 94-GHz, pulsed extended interaction klystron delivering 2-kW pulse RF power at 1.4% duty cycle, (d) develop cooling
techniques for wave guides carrying such power for testing high power amplifier in thermal vacuum chamber. |
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Microstrip Yagi Antenna With Dual Aperture-Coupled Feed
hot!
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Date added: 01/02/2008 |
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A microstrip Yagi employing a dual offset aperture-coupled feed to obtain circular polarization was designed to operate at X-band (8.4 GHz). The X-band microstrip Yagi array designed in this work consists of three Yagi array elements, with each element having one reflector patch, one driven patch, and two director patches. |
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Patterned Ferroelectric Films for Tunable Microwave Devices
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Date added: 01/02/2008 |
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The inclusion of voltage-tunable barium strontium titanate (BSTO) thin films into planar band pass filters offers
tremendous potential to increase their versatility. The ability to tune the passband so as to correct for minor
deviations in manufacturing tolerances, or to completely reconfigure the operating frequencies of a microwave
communication system, are highly sought-after goals. This
study explores the use of patterned ferroelectric layers to minimize dielectric losses without degrading tunability. |
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Inertial Orientation Trackers With Drift Compensation
hot!
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Date added: 01/02/2008 |
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A self-contained sensor apparatus generates a signal that corresponds to at least two of the three orientational aspects of yaw, pitch and roll of a human-scale body, relative to an external reference frame. The sensor may be mounted to the body. |
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Metrology Camera System Using Two- Color Interferometry
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Date added: 12/03/2007 |
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The invention measures both bearing and range to
multiple targets with no moving parts. The system is based on the combination of the Modulation Sideband Technology for Absolute Ranging (MSTAR) sensor and the Array Heterodyne Interferometer. It permits measurement of the three-dimensional position of multiple targets with sub-millimeter accuracy. |
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Four-Way Ka-Band Power Combiner
hot!
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Date added: 12/03/2007 |
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This power combiner utilizes a junction of 5 rectangular waveguides in a radial waveguide. Input signals sent into any four ports, when properly phased, will combine and come out the remaining port. |
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Design and Fabrication of High- Efficiency CMOS/CCD Imagers
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Date added: 12/03/2007 |
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A new architecture is presented that simultaneously provides high sensitivity, excellent angular response and is compatible with next generation CMOS dielectric and metallizaton technologies. |
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