231results about How to "Increase field strength" patented technology

The present inventions are directed to touch sensors with improved topological equivalence between an equipotential space and a Cartesian space to which the equipotential space will be mapped. The touch sensor comprises a substrate with a touch region, and a set of electrodes that are electrically coupled to the touch region. The touch sensor further comprises a plurality of resistive band segments that frames the touch region. The electrodes are located between the resistive band segments. Each resistive band segment has a resistivity that is intermediate between the resistivity of the electrodes and the resistivity of the touch region, thereby providing a transition between the low resistivity electrodes and the high resistivity touch region, and improving the topological equivalence within the corners of the touch region. At least one of the band segments has a non-uniform linear resistance to provide further improvement to the topological equivalence.

A catheter, particularly an intra-vascular catheter, has at least one magnetic field-generating element arranged in the catheter envelope in the region of the catheter tip, characterized in that the magnetic field of which is variable while the catheter is inserted into a patient.

A magnetic write head for us in perpendicular magnetic recording tapered trailing shield design for improved write flux, and field gradient performance.

A system and method for tracking articles and controlling inventory thereof on a real time basis comprising the use of a tag assembly including a plurality of tags including both active tags and passive tags distinguishable from one another by the provision of a self contained power source in the active tags. One or more readers are disposed within a locale being monitored and are structured to communicate received data transmission from a host controller, for additional administrative processing in terms of determining the existence, location and/or movement of various articles with which the plurality of tags are directly associated. Depending on their category the tags may be activated by either entering an electric field of a predetermined first frequency or by receiving an activation signal from the reader assembly also transmitted at the first predetermined frequency. Communication between the tags and the reader occurs at a second frequency being different from the first frequency.

The present disclosure provides a high performance hybrid magnetic structure made from a combination of permanent magnets and ferromagnetic pole materials which are assembled in a predetermined array. The hybrid magnetic structure provides means for separation and other biotechnology applications involving holding, manipulation, or separation of magnetic or magnetizable molecular structures and targets. Also disclosed are further improvements to aspects of the hybrid magnetic structure, including additional elements and for adapting the use of the hybrid magnetic structure for use in biotechnology and high throughput processes.

A circuit arrangement for deriving electrical power from a received electromagnetic field to power a transponder includes a detuning unit connected between two antenna terminals for limiting the power absorbed by the antenna. The detuning unit includes a component having an impedance that passively varies or is actively varied dependent on the field strength of the field prevailing at the antenna. One arrangement of the detuning unit includes two varactor diodes connected anti-parallel between the antenna terminals. Another arrangement of the detuning unit includes a varactor arranged in series between two capacitors between the antenna terminals, a field strength detector, and a controllable voltage source connected to apply to the varactor a control voltage that varies depending on the detected field strength. Thereby, the input impedance varies depending on the field strength, to achieve impedance matching for a low field strength, and a mis-matched condition for a high field strength.

A process for simultaneously coating and forming a body. The process includes moving two mold halves into contact with one another; introducing an injection-molding material into the mold halves so that a molding is formed; evacuating the molding; admitting a gas into the molding; igniting a plasma in the molding so that a coating is deposited on the inner side of the molding; and moving the mold halves apart so that the molding drops out.

A process for preparing crystalline sugar by providing a solution of a solvent and sugar, exposing the solution to a magentic field having a strength which is sufficient to impart improvements in the processing of the sugar or the properties of the resulting crystalline sugar product, and providing conditions suitable for crystallization to obtain a substantially crystalline sugar product. The magnetic field strength is sufficient to influence at least one of morphology, size, nucleation rate or, crystallinity of the crystalline sugar product.

A substrate for enhanced electromagnetic spectroscopy of an analyte comprises a solid support and a plurality of individual nanoparticles affixed thereto, wherein the nanoparticles are designed to have an increased electromagnetic field strength and/or plasmon resonance frequency that is between the frequency of an incident electromagnetic radiation and the frequency of the Raman response from the analyte and wherein the Raman response is enhanced by the individual nanoparticles. The nanoparticles may comprise a shell surrounding a core and the thicknesses of the core and the shell are selected to produce a plasmon resonance frequency. The wavelength of the incident radiation may be between 200 nm and 20 microns. A method for carrying out spectroscopy comprises providing a light source having a frequency different from that of the analyte, selecting a nanoshell configuration, providing a plurality of nanoshells with that configuration, and affixing the nanoparticles to a support.

A method and structure for designing near-field probes with high sensitivity used in detecting a wide variety of materials and objects such as biological anomalies in tissues, cracks on metallic surfaces, location of buried objects, or composition of material such as permittivity and permeability . . . etc., is disclosed. The present invention includes using single or multiple metamaterial unit cells or metamaterial particles as near-field sensors. Metamaterial unit cells are defined as the building blocks used for fabricating metamaterials that provide electrical or magnetic properties not found in naturally occurring media. Metamaterial unit cells or particles include split-ring resonators, complementary split-ring resonators, or a variety of other electrically-small resonators made of conducting wires or conducting flat surfaces. Metamaterial unit cells are excited by appropriate excitations such as small loops, microstriplines, etc. depending on the electromagnetic properties of the metamaterial unit cell. Once the metamaterial unit cell is excited, the reflection and transmission coefficients from the excitation mechanism can be measured.

A wide bore, high field superconducting magnet. The superconducting magnet has a plurality of superconducting coils impregnated with epoxy and nested within each other. An innermost one of the nested coils has a bore therethrough that defines a bore width of the magnet. The bore width is greater than approximately 100 millimeters. The nested coils are electrically connected in series and cooled to an operating temperature less than approximately 4 degrees K. The magnet also has external reinforcements on the coils that are applied prior to impregnating the coils with epoxy. An active protection circuit protects the coils in response to a quench in the magnet. The protection circuit includes heater elements positioned in thermal contact with the coils prior to impregnating the coils with epoxy. The magnet further has lead supports for supporting the lead wires with epoxy that extend from the coils.

A two-hop distant node is recognized by exchanging a Hello message, and an RTS message is transmitted through a doubled transmission distance prior to transmission of a data packet. Each node manages a channel available to a self node and an adjacent node in a channel status table based on the RTS message. A node which tries to transmit the data packet refers to the channel status table, so as to be capable of easily selecting a channel available to the self node and a node of a communication destination. Transmission wireless field strength is enhanced or a modulating system strongly resistant to noises is used so that the RTS message is transmitted at a distance which is not less than twice as long as that of the Hello message and the data packet.

A method and apparatus for near-field focusing of an incident wave, over a range of frequencies from microwaves to optical frequencies, into a sub-wavelength spot having a peak-to-null beamwidth of λ/10. The screen may be made out of closely spaced, unequal slots cut on a metallic sheet. Nano-scale focusing capability may be achieved with a simple structure of three slots on a metallic sheet, which can be readily implemented using current nanofabrication technologies. Unlike negative-refractive-index focusing implementations, this “meta-screen” does not suffer from image degradation when losses are introduced and is easily scalable from microwave to Terahertz frequencies and beyond. The slotted geometry is designed using a theory of shifted beams to determine the necessary weighting factors for each slot clement, which are then converted to appropriate slot dimensions.

The invention relates to an inductive component (10) whose soft-magnetic core (11) consists of a powder composite. Said powder composite is produced by mixing a ferromagnetic amorphous or nanocrystalline alloy powder with a ferromagnetic dielectric powder and a thermoplastic or duroplastic polymer. Unlike conventional injection-molded or cast soft-magnetic cores, cores from a composite comprising a dielectric ferromagnetic powder allow for packing densities of substantially more than 55% by volume.

A dielectric device of higher performance is provided. An electron emitter, to which the dielectric device is applied is provided with: an emitter including a dielectric; and an upper electrode and a lower electrode to which drive voltage is applied in order to emit electrons. The emitter is formed by the aerosol deposition method or the sol impregnation method.

The invention relations to a planar motor adopting a three-dimensional permanent magnet array, and the planar motor comprises a rotor and a stator. The rotor adopts a three-dimensional permanent magnet array, the three-dimensional permanent magnet array consists of S-type and N-type big permanent magnets which are respectively provided with an S-pole upper bottom surface and an N-pole upper bottom surface and both shaped like frustums of square pyramids and a small permanent magnet, the S-type and the N-type big permanent magnets both carry out the magnetizing along the direction of connecting lines of centers of the respective upper and lower bottom surfaces, the small permanent magnet is obtained by symmetrically cutting a quadrangular pyramid from the upper bottom surface and the lower bottom surface of a straight triangular prism with the bottom surface which is shaped like an isosceles triangle, the magnetizing direction is parallel to the direction of the bottom side of the isosceles triangle of the bottom surface, the lower bottom surfaces of the S-type and the N-type big permanent magnets are downward, the S-type and the N-type big permanent magnets are arranged in a staggered manner along the X direction and the Y direction for forming a planar array, the small permanent magnet is arranged between the adjacent two big permanent magnets, and the magnetizing direction of the small permanent magnet is pointed to an S pole of the adjacent S-type big permanent magnet from an N pole of the N-type big permanent magnet. The rotor can generate higher field strength mass ratio in air gap and further improve the thrust and the acceleration of the planar motor.

An optical fibre is provided having a fibre cladding around a longitudinally extending optical propagation core. The cladding has a reflection region of a varying refractive index in the longitudinal direction.

A method for programming a storage element and a storage element programmed using gate induced junction leakage current are provided. The element may include at least a floating gate on a substrate, an active region in the substrate, and a second gate adjacent to the floating gate. The method may include the steps of: creating an inversion region in the substrate below the floating gate by biasing the first gate; and creating a critical electric field adjacent to the second gate. Creating a critical electric field may comprise applying a first positive bias to the active region; and applying a bias less than the first positive bias to the second gate. The element further includes a first bias greater than zero volts applied to the active region and a second bias greater than the first bias applied to the floating gate and a third bias less than or equal to zero applied to the second gate. The first and third bias are selected to create leakage current in the substrate between the floating gate and the select gate.

An object of the present invention is to make it possible to accurately grasp the state inside an object to be measured. According to the present invention there is provided a measuring apparatus comprising: quasi-electrostatic field generating means generating a quasi-electrostatic field of higher strength as compared with a radiated electric field and an induced electromagnetic field; quasi-electrostatic field detecting means detecting a result of interaction between the quasi-electrostatic field generated by the quasi-electrostatic field generating means and applied to a human body, and an electric field corresponding to a potential change caused by a biological reaction inside the human body; and extracting means extracting the potential change from the result of interaction.

A system and method for tracking articles and monitoring them on a real time basis comprising the use of a tag and one or more reader disposed within a locale being monitored and structured to communicate received data transmission to or from a host controller, for additional administrative processing in terms of determining the existence, location, state and/or movement of various articles with which the plurality of tags are directly associated. Depending on their category the tags may be activated by either entering an electric field of a predetermined first frequency or by receiving an activation signal from the reader assembly also transmitted at the first predetermined frequency. Communication between the tags and the reader occurs at a second frequency being different from the first frequency.

An electrooptic device (2), and the methods for manufacturing, including a liquid crystal material (12) disposed between electroded flat glass or polymer substrates (4, 20) which have been precoated with a e.g. a chiral smectic surface layer (10, 14) in such way that the surface layer is able to mediate switching of the liquid crystal (12) between different optical states. The chiral smectic surface layer can be a polymer, oligomer or monomer liquid crystal with paraelectric, ferroelectric, ferrielectric or antiferroelectric response, which is insoluble in the liquid crystal used for the bulk (12) between the electroded substrates (4, 20). the switchable surface director enforces a certain orientation of the optic axis in the bulk liquid crystal (12), which can be a conventional non-chiral or chiral nematic or smectic in a twisted or non-twisted configuration.