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327 results about "Rf field" patented technology
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Radio Frequency Field (RF Field) Definition - What does Radio Frequency Field (RF Field) mean? A radio frequency field (RF field) is an alternating current which, when put through an antenna, generates an electromagnetic field for wireless broadcasting or communication by sending a current through an antenna.
Method and apparatus for wireless powering and recharging
InactiveUS6127799ABatteries circuit arrangementsSecondary cells charging/dischargingRf fieldMicrowave
An arrangement is provided for charging a charge storage device by placing the charge storage device in an RF or microwave radiation field. One or more antennas which receive the radiated RF electromagnetic field are placed on the charge storage device. Rectifiers connected to the antennas rectify the received RF electromagnetic field an produce a DC output current which is used to charge the charge storage device. The charge storage device may be a battery or a capacitor and may form an integral part of an electronic device. The same RF field that charges the charge storage device can also be employed to communicate data to transponders which may be associated with computing devices.
Owner:RAYTHEON BBN TECH CORP
Radio frequency identification (RF-ID) based discovery for short range radio communication
InactiveUS6892052B2Shorten sessionShorten the timeCordless telephonesConnection managementRf fieldConnectionless communication
Owner:NOKIA TECH OY
Specimen carrier for automated transport system and method and apparatus for identifying same
A specimen carrier comprises a unitary structure for receiving and retaining a specimen container in an upright orientation. Such unitary structure is defined by a pedestal having upper and lower platforms connected by a stem. Extending upwardly from the upper platform is a plurality of rigid members which support a plurality of opposing flexible fingers adapted to engage and press upon the side wall of a specimen container received by the carrier. Preferably, the specimen carrier of the invention has a chamber formed therein for housing a pre-programmed, programmable or otherwise radio-frequency (RF) identification tag in the form of an RF transponder. Upon being energized by a suitable RF field provided by an RF reader antenna or sensor positioned adjacent the carrier's intended path of movement, the tag transmits a unique identification code, such code being received by the antenna or sensor and decoded by the reader.
Owner:COULTER INTERNATIONAL CORPORATION
Radio frequency (RF) heating system
An RF heating system for bonding a first element to a second element. In one embodiment, the RF heating system includes: (a) a composition, which functions as an adhesive, interposed between the first and second elements, the composition including an ionomer and a polar carrier, wherein the ionomer and / or the carrier are present in amounts effective to allow the composition to be headed by a fringe RF field; and (b) a radio frequency (RF) heating apparatus for producing the fringe RF field.
Owner:AMBRELL CORP
Wireless electromagnetic parasitic power transfer
A wireless system including an antenna, an electrical energy storage unit connected to the antenna, the energy storage unit receiving power via electromagnetic coupling of the antenna with an RF field generated by a master unit, and an electronics package. The electronics package is powered by the energy storage unit, and it includes a sensor, a processor that is capable of acquiring data from the sensor, and a transmitter connected to the processor and to the antenna, wherein the energy storage unit is capable of storing sufficient energy to supply power for the processor to format a message containing data acquired from the sensor and for the transmitter to transmit the message wirelessly via the antenna.
Owner:SECURAPLANE TECH
Resonator system
ActiveUS7193418B2Improve efficiencySmall angleMagnetic measurementsElectric/magnetic detectionElectricityResonance
Owner:BRUKER SWITZERLAND AG
Frequency selective passive component networks for implantable leads of active implantable medical devices utilizing an energy dissipating surface
InactiveUS20100023000A1Increase temperatureAbility to in properMultiple-port networksElectrocardiographyEnergy transferRf field
Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an implantable leadwire of an active implantable medical device, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from a leadwire electrode to a point or an area spaced from the electrode, for dissipation of high-frequency energy.
Owner:WILSON GREATBATCH LTD
Stimulating production from oil wells using an RF dipole antenna
ActiveUS20140152312A1Reduced effectivenessLow thermal conductivityFluid removalDetection using electromagnetic wavesRf fieldElectrical conductor
A system emplaced in a subsurface formation configured to produce radio frequency (RF) fields for recovery of thermally responsive constituents includes coaxially disposed inner and outer conductors connected at an earth surface to an RF power source. The inner and outer conductors form a coaxial transmission line proximate said earth surface and a dipole antenna proximate said formation. The inner conductor protrudes from the outer conductor from a junction exposing a gap between the conductors to a deeper position within the formation. The RF power source is configured to deliver, via the conductors, RF fields to the formation. The system also includes at least one choke structure attached to said outer conductor at a distance at least ¼ wavelength above said junction. The choke structure is configured to confine a majority of said RF fields in a volume of said formation situated adjacent to said antenna.
Owner:PYROPHASE INC
RFID tag having combined battery and passive power source
An RFID tag is powered both by an internal battery and passively by an interrogating RF field. As a result, the RFID tag can be passively powered after the internal battery has been depleted. More particularly, an embodiment of the RFID tag includes electronic circuitry to provide RFID functionality, and an energy storage device coupled to the electronic circuitry to provide an operational voltage thereto. A battery is operatively coupled to the energy storage device to charge the energy storage device. A rectified RF power source derived from an interrogating RF field is also operatively coupled to the energy storage-device to charge the energy storage device. The rectified RF power source and the battery are electrically separated from each other. The energy storage device remains charged by the battery in the absence of the RF interrogating field while the battery has remaining capacity. After the battery has become depleted, the energy storage device is charged by the presence of the RF interrogating field.
Owner:INTERMEC IP
Radio frequency identification (rf-id) based discovery for short range radio communication
InactiveUS20050079817A1Shorten identification timeShorten session set-up timeConnection managementData switching by path configurationRf fieldConnectionless communication
A RF-ID based wireless terminal has shortened session set-up and user identification time for conducting transactions with interactive service applications. The wireless terminal includes a terminal identification number and a user identification as a RF-ID tag. A RF-ID reader transmits a RF field for detecting the RF-ID tag in the terminal and provides an output signal when the terminal is within the reader field. The output signal establishes a connectionless communication to an access point or other terminal which initiates a wireless paging operation, in lieu of conducting a terminal discovery process, based upon the content of the RF-ID tag. The terminal initiates a wireless session between the terminal and the access point or terminal for conducting transactions with a service application linked to the access point or terminal.
Owner:NOKIA TECHNOLOGLES OY
Blocking contactless personal security device
A blocking Personal Security Device (PSD) is disclosed which is intended to protect the privacy of one or more contactless PSDs present within a common RF field generated by a contactless PSDs RF reader. The blocking PSD is programmed to exploit an anti-collision protocol used by the RF reader. The blocking PSD prevents the RF reader from accessing a contactless PSD within the common RF field by ignoring wait time commands and repeatedly responding to the RF reader's interrogations.
Owner:ACTIVIDENTITY
Frequency selective passive component networks for implantable leads of active implantable medical devices utilizing an energy dissipating surface
InactiveUS7689288B2Increase temperatureAbility to in properDiagnosticsInternal electrodesEnergy transferRf field
Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an implantable leadwire of an active implantable medical device, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from a leadwire electrode to a point or an area spaced from the electrode, for dissipation of high-frequency energy.
Owner:WILSON GREATBATCH LTD
Human feedback using parasitic power harvesting of RFID tags
The present invention is directed toward secure access systems. Specifically, a radio frequency (RF) enabled device is provided that includes an RF powered human feedback element. An interrogator emitting an RF field may control the human feedback element through the RF field such that information may be transmitted from the interrogator to the device.
Owner:ASSA ABLOY AB
Magneto-acoustic imaging
An apparatus having a coil of wire, energized by a repetitively pulsed radio frequency (RF) power source to provide electromagnetic fields to a region within a body. A scanning, directional hydrophone acoustically connected to the body, samples ultrasonic radiation generated by the RF fields at the RF frequency or twice the RF frequency induced from conductive spots. Signals from the hydrophone are analyzed with regard to their time of arrival relative to the RF pulses and with respect to their direction of arrival. These collected data are recorded and displayed as images of the spots within the region.
Owner:MAGNETUS
Frequency selective passive component networks for active implantable medical devices utilizing an energy dissipating surface
InactiveUS20100217262A1Direct contact guaranteeMultiple-port networksElectrotherapyRf fieldEnergy transfer
Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to the housing for an active implantable medical device (AIMD) which serves as an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an AIMD, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from an AIMD lead to the AIMD housing for dissipation of said high-frequency energy.
Owner:WILSON GREATBATCH LTD
Frequency selective passive component networks for implantable leads of active implantable medical devices utilizing an energy dissipating surface
InactiveUS20100016936A1Increase temperatureAbility to in properDiagnosticsInternal electrodesEnergy transferRf field
Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an implantable leadwire of an active implantable medical device, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from a leadwire electrode to a point or an area spaced from the electrode, for dissipation of high-frequency energy.
Owner:WILSON GREATBATCH LTD
Method and apparatus for ion manipulation using mesh in a radio frequency field
ActiveUS20110192969A1Better wayEasy to buildTime-of-flight spectrometersIsotope separationIon chromatographyDesorption
Ion manipulation systems include ion repulsion by an RF field penetrating through a mesh. Another comprises trapping ions in a symmetric RF field around a mesh. The system uses macroscopic parts, or readily available fine meshes, or miniaturized devices made by MEMS, or flexible PCB methods. One application is ion transfer from gaseous ion sources with focusing at intermediate and elevated gas pressures. Another application is the formation of pulsed ion packets for TOF MS within trap array. Such trapping is preferably accompanied by pulsed switching of RF field and by gas pulses, preferably formed by pulsed vapor desorption. Ion guidance, ion flow manipulation, trapping, preparation of pulsed ion packets, confining ions during fragmentation or exposure to ion to particle reactions and for mass separation are disclosed. Ion chromatography employs an ion passage within a gas flow and through a set of multiple traps with a mass dependent well depth.
Owner:LECO CORPORATION
Pulse-to-Pulse-Switchable Multiple-Energy Linear Accelerators Based on Fast RF Power Switching
A method and apparatus for modulating at least one of energy and current of an electron beam in a linac for fast switching of particle beam energy on a time scale comparable with, and shorter than, the interval between linac pulses. Such modulation may be achieved by dividing, in a coupler, a radio-frequency (RF) field into field components and coherently adding these components in a phase shifting section to selectively direct the RF field to a chosen section of the linac. The phase shifting section may include at least one arm containing at least one fast switch and at least one phase changer. In specific embodiments, the phase shifting section may include an electronically controlled plasma switch and a plasma short.
Owner:AMERICAN SCI & ENG INC
RF surfaces and RF ion guides
ActiveUS7365317B2Promote sportsFreedom of movementStability-of-path spectrometersTime-of-flight spectrometersPotential wellRf field
Apparatus and methods are provided for trapping, manipulation and transferring ions along RF and DC potential surfaces and through RF ion guides. Potential wells are formed near RF-field generating surfaces due to the overlap of the radio-frequency (RF) fields and electrostatic fields created by static potentials applied to surrounding electrodes. Ions can be constrained and accumulated over time in such wells. During confinement, ions may be subjected to various processes, such as accumulation, fragmentation, collisional cooling, focusing, mass-to-charge filtering, spatial separation ion mobility and chemical interactions, leading to improved performance in subsequent processing and analysis steps, such as mass analysis. Alternatively, the motion of ions may be better manipulated during confinement to improve the efficiency of their transport to specific locations, such as an entrance aperture into vacuum from atmospheric pressure or into a subsequent vacuum stage.
Owner:PERKINELMER U S LLC
Frequency selective passive component networks for implantable leads of active implantable medical devices utilizing an energy dissipating surface
InactiveUS7751903B2Increase temperatureAbility to in properMultiple-port networksElectrocardiographyRf fieldEnergy transfer
Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an implantable leadwire of an active implantable medical device, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from a leadwire electrode to a point or an area spaced from the electrode, for dissipation of high-frequency energy.
Owner:WILSON GREATBATCH LTD
RFID device detection system and method
An RFID device detection system includes a proximity locator, which generates an electric field for reading an antennaless RFID device, or for reading other, antennaed RFID devices. An antennaless RFID device includes non-antenna conductive leads coupled to a chip. The proximity locator includes one or more conductors forming a transmission line structure arranged to set up a strong RF electric field in proximity to the locator. The strong RF electric field may be a short-range field that provides significant RF energy only over a relatively short distance, when compared with traditional RF fields that are set up over a relatively large distance. The short-range RF field allows coupling to antennaed and antennaless RFID devices that are near to the proximity locator. The RFID device detection system may be employed in a variety of tasks, including inventory control and theft detection.
Owner:AVERY DENNISON CORP
Anti-tear protection for smart card transactions
InactiveUS6727802B2Avoid collisionShorten transaction timeMemory record carrier reading problemsUnauthorized memory use protectionInformation processingProduct system
A fast data transfer collection system using message authentication and contactless RF proximity card technology in non-contact storage and retrieval applications. The system is generally comprised of Host computers (application computer systems), Target radio frequency (RF) terminals, and a plurality of portable Tags ("smart" or "proximity" cards). A Host provides specific application functionality to a Tag holder, with a high degree of protection from fraudulent use. A Target provides control of the RF antenna and resolves collisions between multiple Tags in the RF field. A Tag provides reliable, high speed, and well authenticated secure exchanges of data / information with the Host resulting from the use of a custom ASIC design incorporating unique analog and digital circuits, nonvolatile memory, and state logic. Each Tag engages in a transaction with the Target in which a sequence of message exchanges allow data to be read(written) from(to) the Tag. These exchanges establish the RF communication link, resolve communication collisions with other Tags, authenticate both parties in the transaction, rapidly and robustly relay information through the link, and ensure the integrity and incorruptibility of the transaction. The system architecture provides capabilities to ensure the integrity of the data transferred thus eliminating the major problem of corrupting data on the card and in the system. The architecture and protocol are designed to allow simple and efficient integration of the transaction product system into data / information processing installations.
Owner:KELLY GUY M +3
Fragmentation of ions by resonant excitation in a high order multipole field, low pressure ion trap
InactiveUS20030189171A1Promote collision-induced dissociationIncrease probabilityStability-of-path spectrometersMaterial analysis by electric/magnetic meansRf fieldIon trap mass spectrometry
In the field of mass spectrometry, a method and apparatus for fragmenting ions with a relatively high degree of resolution and efficiency. The technique includes trapping the ions in a linear ion trap, in which the background or neutral gas pressure is preferably on the order of 10<-5 >Torr. The trapped ions are resonantly excited for a relatively extended period of time, e.g., exceeding 50 ms, at relatively low excitation levels, e.g., less than 1 Volt(0-pk). The technique allows selective dissociation of ions with a high discrimination. High fragmentation efficiency may be achieved by superimposing a higher order multipole field onto the quadrupolar RF field used to trap the ions. The multipole field, preferably an octopole field, dampens the radial oscillatory motion of resonantly excited ions at the periphery of the trap. This reduces the probability that ions will eject radially from the trap thus increasing the probability of collision induced dissociation.
Owner:DH TECH DEVMENT PTE
Generation of combination of RF and axial DC electric fields in an RF-only multipole
InactiveUS7067802B1Reduce usageParticle separator tubesIsotope separationRf fieldElectrical resistance and conductance
An RF-only multipole includes a spiral resistive path formed around each multipole rod body. RF voltages are applied to the rod body and resistive path, and DC voltages are applied to the resistive path, to create a radially confining RF field and an axial DC field that assists in propelling ions through the multipole interior along the longitudinal axis thereof. In one implementation, the resistive path takes the form of a wire of resistive material, such as nichrome, which is laid down in the groove defined between threads formed on the rod body. The RF-only multipole of the invention avoids the need to use auxiliary rods or similar supplemental structures to generate the axial DC field.
Owner:THERMO FINNIGAN
RF power supply for a mass spectrometer
ActiveUS7498571B2Promote recoveryStability-of-path spectrometersSpectrometer circuit arrangementsShunt DeviceRf field
The present invention provides a radio frequency (RF) power supply in a mass spectrometer. The power supply provides an RF signal to electrodes of a storage device to create a trapping field. Such ion storage devices are often used to store ions prior to ejection to a subsequent mass analyzer. The RF field is usually collapsed prior to ion ejection. The present invention provides a RF power supply comprising: a RF signal supply, a coil arranged to receive the signal provided by the RF signal supply and to provide an output RF signal for supply to electrodes of an ion storage device, and a shunt including a switch operative to switch between a first open position and a second closed position in which the shunt including a switch operative to switch between a first open position and a second closed position in which the shunt shorts the coil output.
Owner:THERMO FINNIGAN
Low frequency asset tag tracking system and method
InactiveUS7414571B2Accurate resolutionReduce decreasePosition fixationElectric/electromagnetic visible signallingRf fieldCargo container
An apparatus and method for low frequency asset tracking includes a low frequency transmitter tag associated with a cargo container or other high value commodity, a plurality of receivers that detect low frequency signals, and a microprocessor that uses algorithms and / or data pertaining to the propagation characteristics of the signal to locate the position of the container or high value commodity. The tag may include sensors to monitor container properties or conditions, such as temperature, motion, intrusion, RF fields, or other properties of interest. Sensor data may be modulated on the low frequency transmitter signal.
Owner:Q TRACK INC
RF transmitter arrangement for an MR system, and method for determining a setting parameter therefor
ActiveUS20050140369A1Leakage of RF power can be substantially preventedAvoid distortionElectric/magnetic detectionMeasurements using magnetic resonanceResonanceTransmitter
A radio frequency transmitter arrangement for a magnetic resonance apparatus has a distribution unit and an antenna unit, wherein the antenna unit, to generate radio frequency fields, is fashioned in at least two orthogonal modes, and the distribution unit is fashioned for the division of an RF transmission signal into at least two mode feed signals. At least one adjustment unit is provided to adjust the amplitude and / or phase of one of the mode feed signals and is connected with the antenna unit such that each of the mode feed signals generates a radio frequency field in one of the modes. A multiple transmitter arrangement has at least two radio frequency transmitter arrangements and at least two 180° hybrids. A method is provided to determine at least one setting parameter of the adjustment unit.
Owner:SIEMENS HEALTHCARE GMBH
Tandem time of flight mass spectrometer and method of use
InactiveCN1689134AAcquisition speed is fastHigh sensitivityTime-of-flight spectrometersElectron/ion optical arrangementsRelative energyMass analyzer
To provide comprehensive (i.e. rapid and sensitive) MS-MS analysis, the inventor employs a time-nested separation, using two time-of-flight (TOF) mass spectrometers. Parent ions are separated in a slow and long TOF1, operating at low ion energy (1 to l00eV), and fragment ions are mass analyzed in a fast and short TOF2, operating at much higher keV energy. Low energy fragmentation cell between TOF1 and TOF2 is tailored to accelerate fragmentation and dampening steps, mostly by shortening the cell and employing higher gas pressure. Since separation in TOF1 takes milliseconds and mass analysis in TOF2- microseconds, the invention provides comprehensive MS-MS analysis of multiple precursor ions per single ion pulse. Slow separation in TOF1 becomes possible with an introduction of novel TOF1 analyzers. The TOF-TOF could be implemented using a static TOF1, here described on the examples of spiratron, planar and cylindrical multi-pass separators with griddles spatial focusing ion mirrors. Higher performance is expected with the use of novel hybrid TOF 1 analyzers, combining radio frequency (RF) and quadratic DC fields. RF field retains low-energy ions within TOF 1 analyzer, while quadratic DC field improves resolution by compensate for large relative energy spread.
Owner:力可公司
Intensity modulated three-dimensional radiation scanning method and apparatus
The invention relates to treatment of solid cancers and more particularly to a method and apparatus correlating proton beam intensity with proton delivery efficiency, optionally in a raster beam scanning system. The system induces betatron oscillation on the proton beam causing the beam to traverse an extraction material resulting in slowed protons and a feedback current proportional to the proton flux. A controller receives the desired intensity from an irradiation plan and the feedback current and adjusts the radio-frequency field in the radio-frequency cavity system to yield an intensity of the proton beam that matches the desired intensity from the irradiation plan. Preferably, the intensity of the proton beam correlates with radiation delivery efficiency. The system preferably operates in conjunction with a multi-field charged particle cancer therapy system, with charged particle beam injection, particle beam acceleration, multi-axis charged particle beam control, and / or targeting methods and apparatus.
Owner:BALAKIN ANDREY VLADIMIROVICH +1
Low Frequency Inductive Tagging for Lifecycle Managment
InactiveUS20110169657A1Double communication speedIncrease rangeIndividual entry/exit registersSubscribers indirect connectionRadio frequency energyData memory
A lifecycle management system for detection and tracking of drillpipes which carry low radio frequency tags that comprise an inductive antenna and transceiver operable at a first radio frequency below 1 megahertz, a transceiver operatively connected to that antenna, an ID data storage device, a microprocessor for handling data from the transceiver and data store, and a tag energization inductive antenna which can receive radio frequency energy from an ambient radio frequency field of a second low radio frequency. The system includes a field communication inductive antenna disposed, preferably at a distance of several feet from each object, that permits effective communication therewith at the aforesaid first radio frequency, a data receiver, transmitter and reader data processor in operative communication with the field communication inductive antenna, and a field energization inductive antenna which can produce the ambient radio frequency field at the tag energization inductive antenna.
Owner:VISIBLE ASSET INC
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