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Results 1326–1350 of 1,875

Pseudo-spectral method to control three-degree-of-freedom wave energy converters

Patent • #US10344736B2. The invention provides optimal control of a three-degree-of-freedom wave energy converter using a pseudo-spectral control method. The three modes are the heave, pitch and surge. A dynamic model is characterized by a coupling between the pitch and surge modes, while the heave is decoupled. The heave, however, excites the...

Pulsed source for driving non-linear current dependent loads

Patent • #US11791601B1. A pulsed current source comprises a power source, a discharge capacitor, and an inductive element. The discharge capacitor is selectively coupled to either of the power source or the inductive element. When coupled to the power source, the discharge capacitor is charged. The inductive element can be connected to...

Push Plate for Ball Grid Array Test Sockets

Featured Opportunity • A low profile, controlled force, minimal torque push plate for ball grid array multi-chip module (MCM) test sockets The ball grid array (BGA) is an enabling technology for multi-chip modules, a significant improvement over pin grid arrays. Traditional pin grid array technology suffers from physical limitations; as package pins get...

Pyroelectric demodulating detector

Patent • #US7397301B1. A pyroelectric demodulating detector (also termed a pyroelectric demodulator) is disclosed which utilizes an electrical resistor stacked upon a pyroelectric element to demodulate an rf or microwave electrical input signal which is amplitude-modulated (AM). The pyroelectric demodulator, which can be formed as a hybrid or a monolithic device, has...

Quadrilateral finite element mesh coarsening

Patent • #US8289322B1. Techniques for coarsening a quadrilateral mesh are described. These techniques include identifying a coarsening region within the quadrilateral mesh to be coarsened. Quadrilateral elements along a path through the coarsening region are removed. Node pairs along opposite sides of the path are identified. The node pairs along the path...

Quadrilateral/hexahedral finite element mesh coarsening

Patent • #US8290754B1. A technique for coarsening a finite element mesh (FEM) is described. This technique includes identifying a coarsening region within the FEM to be coarsened. Perimeter chords running along perimeter boundaries of the coarsening region are identified. The perimeter chords are redirected to create an adaptive chord separating the coarsening...

Quantum Science

Technology Area • The Quantum Science technology area contains advances in the understanding and mastery of quantum systems for the manipulation of information with greater sensitivity, speed, and security than is possible with classical information processing methods.   This technology area also contains specialized portfolios related to:   Quantum Computing Materials & Qubit TechnologiesQuantum...

Quantum-size-controlled photoelectrochemical etching of semiconductor nanostructures

Patent • #US9276382B2. Quantum-size-controlled photoelectrochemical (QSC-PEC) etching provides a new route to the precision fabrication of epitaxial semiconductor nanostructures in the sub-10-nm size regime. For example, quantum dots (QDs) can be QSC-PEC-etched from epitaxial InGaN thin films using narrowband laser photoexcitation, and the QD sizes (and hence bandgaps and photoluminescence wavelengths) are...

Quenching of Unincorporated Amplification Signal Reporters (QUASR)

Featured Opportunity • Sandia’s QUASR modification to LAMP helps satisfy the requirements for a simple, robust, and inexpensive point-of-care deployed diagnostic device Rapid changes in how the world must react to pandemics has led to an unprecedented effort to develop rapid, easy to interpret point-of-care tests that meet the World Health Organization (WHO)...

Radar & THz

Technology Area • The Radar & Terahertz (THz) technology area contains advances in detection and imaging using THz waves developed for security, biomedical, and communications applications. Sandia has been at the forefront of new radar breakthroughs for more than 30 years, including historic developments in Synthetic Aperture Radar (SAR).    This technology area...

Radar transmit bandwidth augmentation

Patent • #US12436251B1. Various technologies pertaining to forming a very high instantaneous bandwidth (IBW) radar signal based upon several radio frequency (RF) signals that have sub-bands of the frequency band of the radar signal are described herein. A radar system is configured to address local oscillator leakage across multiple transmit channels of...

Radar transmit bandwidth augmentation

Patent • #US12436252B2. Various technologies pertaining to forming a very high instantaneous bandwidth (IBW) radar signal based upon several radio frequency (RF) signals that have sub-bands of the frequency band of the radar signal are described herein. A radar system is configured to address local oscillator leakage across multiple transmit channels of...

Radar transmit bandwidth augmentation

Patent • #US12061249B1. Various technologies pertaining to forming a very high instantaneous bandwidth (IBW) radar signal based upon several radio frequency (RF) signals that have sub-bands of the frequency band of the radar signal are described herein. A radar system is configured to address local oscillator leakage across multiple transmit channels of...

Radar velocity determination using direction of arrival measurements

Patent • #US9846229B1. The various technologies presented herein relate to utilizing direction of arrival (DOA) data to determine various flight parameters for an aircraft A plurality of radar images (e.g., SAR images) can be analyzed to identify a plurality of pixels in the radar images relating to one or more ground targets....

Radial particle-based terrestrial thermocline for high temperature thermal storage

Patent • #US11549761B1. A system or method for thermal storage includes a recess or containment unit having a first storage layer and a second storage layer comprising a permeable filler material. An intermediate layer is disposed between the storage layers. A primary well traverses the layer in the recess. The primary well...

Radiation detector using a graphene amplifier layer

Patent • #US11287536B1. A radiation field is detected or imaged using one or more junction devices in which a two-dimensional conductor layer is capacitively coupled to a semiconductor absorber layer. In the junction devices, pixel-level amplification and read-out are accomplished through the photogating of the devices by absorption within the absorber layer...

Radiation-hardened transistor and integrated circuit

Patent • #US7298010B1. A composite transistor is disclosed for use in radiation hardening a CMOS IC formed on an SOI or bulk semiconductor substrate. The composite transistor has a circuit transistor and a blocking transistor connected in series with a common gate connection. A body terminal of the blocking transistor is connected...
Results 1326–1350 of 1,875