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Method of Remote Powering and Detecting Multiple UWB Passive Tags in an RFID System
Farid Dowla, Faranak Nekoogar, David M. Benzel, Gregory E. Dallum, Alex Spiridon
U.S. Patent 8,188,841 B2
May 29, 2012
A radio-frequency-identification (RFID) tracking and powering system uses coded ultrawideband (UWB) signaling. The proposed hardware and techniques use passive UWB transponders in the field of an RFID-radar system. The radar system enables multiple passive tags to be remotely powered (activated) at about the same time frame via predetermined-frequency UWB-pulsed formats. Once such tags are activated, UWB radar transmits specific interrogating codes to awaken the tags, which then communicate with a unique response code. A UWB system detects the tags using radar methods.

Signal Enhancement Using a Switchable Magnetic Trap
Neil Reginald Beer
U.S. Patent 8,189,186 B2
May 29, 2012
This system for analyzing a sample has a microflow channel. The system associates the sample with magnetic nanoparticles or magnetic polystyrene-coated beads, moves the sample with these nanoparticles or beads into the channel, and holds it there in a magnetic trap in the channel. The sample is then analyzed to obtain an enhanced analysis signal. The apparatus for sample analysis consists of magnetic particles connected to the sample, a microchip with a flow channel, and a carrier-fluid source connected to the flow channel for moving the sample. An electromagnetic trap connected to the flow line selectively traps the sample and the magnetic particles for analysis.

Portable Laser Synthesizer for High-Speed Multidimensional Spectroscopy
Stavros G. Demos, Miroslav Y. Shverdin, Michael D. Shirk
U.S. Patent 8,190,242 B2
May 29, 2012
This portable, field-deployable laser synthesizer is designed for multidimensional spectrometry and time-resolved or hyperspectral imaging. The device includes a coherent light source that simultaneously produces a broad, energetic, discrete spectrum spanning through or within ultraviolet, visible, and near-infrared wavelengths. The light output is spectrally resolved, and each wavelength is delayed with respect to the others. A probe enables light delivery to a target. For multidimensional spectroscopy applications, the probe can collect the resulting emitted light and deliver this radiation to a time-gated spectrometer for temporal and spectral analyses.

Assembly for Electrical Conductivity Measurements in the Piston Cylinder Device
Heather Christine Watson, Jeffrey James Roberts
U.S. Patent 8,193,823 B2
June 5, 2012
This assembly apparatus measures electrical conductivity and other properties of a sample in a piston cylinder device. The device applies pressure and heat to the sample. The assembly apparatus includes a body with an electrode that connects to the sample, an electrical conductor that connects to the electrode, a washer constructed of a hard conducting material that surrounds the electrical conductor, and a second electrode. The second electrode also connects to the sample, and a second electrical conductor connects to the second electrode.

Detecting Fission from Special Nuclear Material Sources
Mark S. Rowland, Neal J. Snyderman
U.S. Patent 8,194,814 B2
June 5, 2012
This neutron-detector system discriminates fissile material from nonfissile material and includes a digital data-acquisition unit that collects data at a high rate. The unit processes in real time large volumes of data directly into information that a first responder can use to discriminate materials. The system counts neutrons from an unknown source and detects excess grouped neutrons to identify fission in the unknown source. The system includes a graphing component that displays the plot of the neutron distribution from the unknown source over a Poisson distribution as well as a plot of neutrons from background or environmental sources. The system further includes a known neutron source placed in proximity to the unknown source to actively interrogate the unknown source and accentuate differences in neutron emission between the known and unknown sources.

Laser Diode Package with Enhanced Cooling
Robert J. Deri, Jack Kotovsky, Christopher M. Spadaccini
U.S. Patent 8,199,787 B2
June 12, 2012
A laser diode package includes a reservoir filled with a fusible metal in close proximity to a laser diode. The fusible metal absorbs heat from the laser diode and undergoes a phase change from solid to liquid during the laser’s operation. The metal absorbs heat during the phase transition. Once the laser diode is turned off, the liquid metal cools and resolidifies. The reservoir is designed such that the liquid metal does not leave the reservoir even when in a liquid state. The laser diode package also includes a lid with one or more fin structures that extend into the reservoir and are in contact with the metal in the reservoir.

Method of Producing an Electronic Unit Having a Polydimethylsiloxane Substrate and Circuit Lines
James Courtney Davidson, Peter A. Krulevitch, Mariam N. Maghribi, William J. Benett, Julie K. Hamilton, Armando R. Tovar
U.S. Patent 8,202,566 B2
June 19, 2012
This metal system is contained in an integrated polymer microsystem. Conductive ink is applied to a flexible polymer substrate made of either silicone or polydimethylsiloxane.

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Privacy & Legal Notice | UCRL-TR-52000-12-10/11 | October 1, 2012