38 results about "Rf radiation" patented technology

Aspects of the present disclosure provide improved techniques for detecting the presence of RF anomalies and providing for enhanced user control of RF anomaly detection and related actions. Some aspects relate to detecting an RF anomaly by determining, based on a multidimensional encoding of characteristics of an RF signal, that the RF signal is anomalous compared to a baseline of multidimensional encodings of characteristics of RF radiation received in the operating environment. Some aspects relate to controlling RF anomaly detection by initiating an action in response to selection of an option displayed to a user in a graphical user interface in along with an indication of an RF signal determined to be anomalous compared to a baseline. Some aspects relate to identifying a subset of RF data and determining a presence of an RF anomaly corresponding to the subset by comparing a representation of RF radiation to a baseline.

Techniques and apparatus for radio frequency (RF) exposure management for multiple radios are described. An example method of wireless communication by a wireless device generally includes determining a first exposure associated with a first radio for a first transmission in a first time interval; determining a first allowable transmit power associated with a second radio for a second time interval based at least in part on the first exposure associated with the first radio; and transmitting a first signal at a first transmit power in the second time interval using the second radio based on the first allowable transmit power.

An antenna comprises first and second radiating elements that are configured to operate in respective first and second operating frequency bands, and a parasitic element that includes a overlapping first and second conductive paths. The first conductive path includes a plurality of first segments and the second conductive path includes a plurality of second segments. A subset of the first segments overlap respective ones of the second segments to form a plurality of pairs of overlapping first and second segments and at least some of these pairs are configured so that an instantaneous direction of a first current formed on the first segment in response RF radiation emitted by the second radiating element will be opposite an instantaneous direction of a second current formed on the second segment in response to the RF radiation emitted by the second radiating element.

The present application discloses a radio frequency drying system and method, a device, and a storage medium. The system comprises a power supply, a radio frequency source, and a radio frequency radiator. The power supply is configured to supply power to the radio frequency source, and the radio frequency source is configured to output to the radio frequency radiator an electromagnetic wave signal in a predetermined radio frequency band. The radio frequency radiator comprises at least two feeding assemblies. Each feeding assembly comprises a feeding port and a corresponding antenna. An input end of the feeding port is connected to the radio frequency source, and an output end of the feeding port is connected to the corresponding antenna. The antennas of the feeding assemblies are configured to generate a uniformly heated electromagnetic field. There is a gap between the antennas of the feeding assemblies, and the gap is configured for placing an object to be dried. The system has a simple overall structure, is easy to miniaturize, and is suitable for being configured to perform radio frequency drying operations on small consumer products, which is helpful for improving the drying effect, achieving uniform and reliable drying, and further improving the use experience of the consumer products. The present application can be widely applied in the technical field of electronic devices.

A method and apparatus for electrical addressing for an antenna (e.g., a metamaterial radio-frequency (RF) antenna are described. In one embodiment antenna comprising: a plurality of radio-frequency (RF) radiating antenna elements located in a plurality of rings; and matrix drive circuitry coupled to the plurality of RF radiating antenna elements to drive the antenna elements, wherein the matrix drive circuitry to uniquely address each of the antenna elements using a matrix of a plurality of rows and a plurality of columns with a non-grid-based addressing structure.

In certain aspects, a method for wireless communication includes transmitting a first transmission with a first transmitter operable according to a first radio technology, and transmitting a second transmission with a second transmitter after completion of the first transmission, the second transmitter operable according to a second radio technology. The method may also include delaying transmission of the second transmission by a predetermined wait time after completion of the first transmission if the first radio technology is a radio frequency (RF) exposure time-averaged technology and the second radio technology is a non-time-averaged RF exposure technology. The method may also include transmitting the second transmission with a limited peak power for a predetermined time period for at least a portion of the second transmission if the first radio technology is a non-time-averaged RF exposure technology and the second radio technology is a time-averaged RF exposure technology.

Edge computing units that are outfitted with signal receivers and provided at local sites or edge locations are configured to capture RF signals and process the RF signals using transformer models. A spectrum encoder of a transformer model performs attention on frequency-encoded features extracted from spectrograms of the RF signals and features extracted from representations of RF signals associated with discrete RF events, and embeddings generated by the spectrum encoder are decoded to classify the RF signals or a source of the RF signals. Additionally, a spectrum decoder of a transformer model is configured to receive a query for information and to generate a response to the query using a spectrum decoder that performs attention on embeddings received from a spectrum encoder, as well as frequency-encoded features representative of the query, and features representative of semantic information regarding RF signals and sources of the RF signals.

A payment terminal comprising a controller is provided. The controller is configured to: (1) generate, via a transceiver electrically coupled to an antenna, an RF radiation field; (2) capture, via the transceiver, a plurality of samples of the RF radiation field; (3) determine sample characteristics based on the plurality of samples; (4) determine comparison metrics by comparing the sample characteristics to one or more baseline characteristics; and (5) set a skimming detection flag based on the one or more comparison metrics. The controller is configured to operate in a payment processing state or an idle state. In some examples, the samples of the RF radiation field are only captured if the payment terminal is in the idle state.

A system includes at least one processor, and a memory that includes computer program code. The memory and the computer program code are configured to, with the at least one processor, cause the at least one processor to monitor a radio frequency (RF) spectrum within an area to detect RF emissions from RF emitters, acquire emission data of the detected RF emissions, process the acquired emission data to determine approximate locations of the RF emitters, and compile the determined approximate locations and acquired emission data into an RF landscape map of the area.

A method for decoating a glazing unit made of a glass panel with a glass sheet which is low in reflectance for RE radiation, where the glass panel has a bent portion with an axis of curvature. The glazing unit also includes a coating system which is high in reflectance for RF radiation disposed on the glass sheet over part of the bent portion. The decoating method includes: decoating a frequency selective surface on the coating system by decoating a matrix of decoated grids; each of the decoated grids has decoated regions in the form of grid lines arranged in a mesh-like manner; each of the decoated grids has a rectangular generic shape; and the decoating is performed by using a laser apparatus. Each of the decoated grids is inscribed in a specific rectangle paralleled to the axis of curvature, and each is oriented by an angle αmn.

Antennas and methods for using the same are described. In one embodiment, the antenna comprises an aperture having a plurality of radio-frequency (RF) radiating antenna elements, the plurality of RF radiating antenna elements being grouped into three or more sets of RF radiating antenna elements, with each set being separately controlled to generate a beam at a frequency band in a first mode.

Antennas and methods for using the same are described. In one embodiment, the antenna comprises an aperture having a plurality of radio-frequency (RF) radiating antenna elements, the plurality of RF radiating antenna elements being grouped into three or more sets of RF radiating antenna elements, with each set being separately controlled to generate a beam at a frequency band in a first mode.

The present invention discloses a glazing unit including a glass sheet having low reflectivity to RF radiation, a coating system having high reflectivity to RF radiation disposed on the glass sheet, and at least one frequency-selective uncoated grid portion on the coating system, the at least one frequency-selective uncoated grid portion including a first uncoated grid and a second uncoated grid, each of the first uncoated grid and the second uncoated grid having a uncoated area in the form of grid lines arranged in a mesh, the first uncoated grid being connected to the second uncoated grid at a connection region, at least in the connection region, the first uncoated grid including a rake design with at least one missing tooth, and the second uncoated grid including a rake design. The present invention also discloses related methods, related apparatus, and uses.

Routing and layout for an antenna are described. In one embodiment, the antenna comprises an aperture having a plurality of radio-frequency (RF) radiating antenna elements, wherein each antenna element of the plurality of RF radiating antenna elements comprises an iris slot opening and an electrode over the iris slot opening; a plurality of drive transistors coupled to the plurality of antenna elements; and a plurality of storage capacitors, each storage capacitor coupled to the electrode of one antenna element of the plurality of antenna elements. The aperture also comprises at least one of: the drive transistor for the one antenna element is located under the electrode of the antenna element, the storage capacitor for the one antenna element is located under the electrode of the antenna element, and the metal routing to the one antenna element for a first voltage overlaps, in an overlap region, a common voltage routing that routes the common voltage to the one antenna element to form a storage capacitance.

Certain aspects of the present disclosure relate to beam selection. An example method generally includes selecting, from a plurality of beams, a beam for uplink transmission during a particular time interval, the selecting being based on a transmission power and a radio frequency (RF) exposure for each of the plurality of beams and transmitting at least one uplink signal using the selected beam during the particular time interval.

Certain aspects of the present disclosure provide techniques for operating a wireless device pursuant to radio frequency (RF) exposure compliance. A method that may be performed by a wireless device includes switching sensing circuitry to a first mode in response to one or more first criteria being satisfied; switching the sensing circuitry to a second mode in response to one or more second criteria being satisfied; and transmitting a signal at a transmit power determined based at least in part on a radio frequency (RF) exposure limit, and if the sensing circuitry is operating in the second mode, on one or more measurements associated with the sensing circuitry.

The present application provides an aerosol substrate heating parameter analysis method, a related device, and a storage medium. The aerosol analysis method is applied to an aerosol-generating system. The aerosol-generating system comprises a power supply, a radio frequency source, and a radio frequency radiator. The radio frequency radiator is configured to serve as a container for accommodating an aerosol substrate and as a radiating element for generating a heating electric field. The method comprises: equivalently modeling the aerosol-generating system in an unloaded state as a first RLC circuit; when the aerosol-generating system is in a loaded state, equivalently modeling the aerosol substrate and the radio frequency radiator as a parallel capacitor, and, on the basis of the parallel capacitor, replacing a capacitor in the first RLC circuit to form a second RLC circuit for the aerosol-generating system in the loaded state; and, on the basis of the second RLC circuit, analyzing changes in target parameters of the aerosol substrate during a heating process.

[0003] An exemplary method for wireless communication by a user equipment (UE) generally includes: identifying a region in which the UE is located; selecting at least one of a mode or one or more parameters for RF exposure compliance based on the identified region; and transmitting a signal at a transmit power level based at least in part on the selected mode or at least one of the selected one or more parameters.

Antennas with tunable elements and methods for using the same are disclosed. In some embodiments, an antenna comprises: a plurality of radio-frequency (RF) radiating antenna elements, wherein each antenna element of the plurality of RF radiating antenna elements comprises a tunable element, circuitry connected to the tuning element to set a voltage on the tunable element. In some embodiments, the circuitry comprises a voltage storage structure, a first transistor having a first gate connected to the voltage storage structure, a first source connected to the tunable element, and a first drain for coupling to a constant voltage source, and a data voltage input terminal operable to apply a voltage to the voltage storage structure and to the first gate to determine current through the first transistor.

This application discloses an radio frequency (RF) drying system, method, apparatus, and storage medium. The system includes a power supply, an RF source, and an RF radiator. The power supply provides power to the RF source, which outputs electromagnetic wave signals in a predetermined RF frequency band to the RF radiator. The RF radiator includes at least two sets of feeding components, each set including a feeding port and a corresponding antenna. The input of the feeding port is connected to the RF source, and the output of the feeding port is connected to the corresponding antenna. The antennas of each set of feeding components generate a uniform heating electromagnetic field, and there are gaps between the antennas of each set of feeding components for placing the object to be dried. The system has a simple overall structure, is easy to miniaturize, and is suitable for RF drying of small consumer products. It helps improve the drying effect, achieves uniform and reliable drying, and thus improves the user experience of consumer products. This application can be widely applied in the field of electronic equipment technology.

This invention provides a flexible conformal radio frequency (RF) radiation device, a head-mounted brain-computer interface (BCI) terminal, and an assembly method, relating to the field of BCI terminal technology. The flexible conformal RF radiation device includes: a flexible dielectric substrate; a radiator comprising multiple conductive patches attached to one side surface of the flexible dielectric substrate, with each adjacent pair of conductive patches connected by a microstrip line; a feed line connected to one end of the radiator for connection to a wireless communication module; and a near-human isolation structure disposed on the side surface of the flexible dielectric substrate opposite to the radiator. The flexible dielectric substrate can be bent into a closed-loop structure with its ends connected. This invention provides an RF radiation device more suitable for the commercial integration of head-mounted BCI terminals, maintaining relatively stable matching characteristics under different head circumferences and assembly conditions, and achieving a manufacturable, assemblable, and reliable conformal arrangement within a limited space, while simultaneously considering coverage of commonly used wireless frequency bands and near-human safety requirements.

A wireless power transmission device is provided. The wireless power transmission device includes a plurality of power transmission antennas, a plurality of sensing antennas, a power processing circuit memory storing one or more computer programs, and one or more processors communicatively coupled to the plurality of power transmission antennas, the plurality of sensing antennas, the power processing circuit, and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the wireless power transmission device to control the power processing circuit to transmit power to a first electronic device disposed in a first region among a plurality of regions through the plurality of power transmission antennas, transmit at least one first signal through the power processing unit using a first sensing antenna among the plurality of sensing antennas, receive at least one second signal through the power processing circuit, using a second sensing antenna among the plurality of sensing antennas, identify, whether an object exists in the first region among the plurality of regions based on the at least one first signal and the at least one second signal, identify a first stay duration during which the object stays in the first region, based on identifying that the object exists in the first region, identify a first cumulative RF radiation value of the wireless power transmission device for the first region during the first stay duration, and based on the first cumulative RF radiation value being equal to or greater than a first threshold for the first region, control the power processing circuit to adjust transmission output of the power to the first electronic device in the first region or to direct the power toward the first electronic device in the first region to a second electronic device in a second region different from the first region.

Certain aspects of the present disclosure provide techniques and apparatus for antenna-aware energy reservation for radio frequency (RF) exposure compliance. An example method of wireless communication includes obtaining information associated with a plurality of antenna ports. The method further includes determining one or more reserves based at least in part on the information. The method further includes transmitting a first signal via a first antenna port at a first transmit power determined based at least in part on the one or more reserves while maintaining at least a portion of the one or more reserves for a future transmission via a second antenna port.

An antenna having a radio frequency (RF) radiating antenna element with a static capacitor is described. In some embodiments, the antenna includes an RF signal source and a plurality of radio frequency (RF) radiating antenna elements coupled to the RF signal source, each of the RF radiating antenna elements comprising a slot, a tuning element coupled to the RF signal source for tuning the slot as part of the RF radiating antenna element that generates a beam, and a fixed capacitor coupled to the RF signal source and coupled in series with the tuning element across the slot, the fixed capacitor for mitigating harmonic generation to control the linear response of the plurality of radio frequency (RF) radiating antenna elements.

A first transmission power level based on a radio frequency exposure limit and a second transmission power level based on the first transmission power level and a probability of detection of a body by a body proximity sensor are determined, where it is ensured that an average usage of the first and second transmission power levels over time does not exceed the transmission power limit, determined based on radio frequency exposure limits. A transmission power gain is determined based on a difference between the first and second transmission power level based on the probability of detection, and a false alarm rate of the body by the body proximity sensor. The transmission power gain may be used as a performance indicator to select from multiple first and second transmission power gains. First and second transmission power gains corresponding to the selected transmission power gain may be stored and applied during transmission.

An antenna having a tuning circuit architecture and methods for using the same are described. In some embodiments, an antenna includes a metasurface having a plurality of radio-frequency (RF) radiating antenna elements. Each of the plurality of antenna elements includes a tuning circuit including a voltage-variable capacitor, a first fixed capacitor coupled in series with the voltage-variable capacitor, and a second fixed capacitor coupled in parallel with the voltage-variable capacitor.

Certain aspects of the present disclosure provide techniques for operating a wireless communication device pursuant to radio frequency (RF) exposure across tissues and / or body locations. An example method of wireless communication by a wireless device generally includes tracking a plurality of RF exposures across a plurality of locations associated with a human body over time. The method further includes transmitting a signal at a transmit power determined based at least in part on a time-averaged RF exposure limit and the tracked RF exposures.

A method for decoating a glazing unit made of a glass panel with a glass sheet which is low in reflectance for RF radiation, where the glass panel has a bent portion. The glazing unit also has a coating system which is high in reflectance for RF radiation disposed on the glass sheet over at least a part of the bent portion with an axis of curvature. The decoating method includes a step of decoating a frequency selective surface on the coating system by decoating a patchwork of decoated grids, connected together two-by-two and edge-to-edge; each decoated grids has decoated regions in the form of grid lines arranged in a mesh-like manner; each of the decoated grids are inscribed in a circle; and the decoating step is performed by using a laser apparatus.

An antenna having a tuning circuit architecture and methods for using the same are described. In some embodiments, an antenna includes a metasurface having a plurality of radio-frequency (RF) radiating antenna elements. Each of the plurality of antenna elements includes a tuning circuit including a voltage-variable capacitor, a first fixed capacitor coupled in series with the voltage-variable capacitor, and a second fixed capacitor coupled in parallel with the voltage-variable capacitor.

A threshold magnetometer includes a vertical cavity surface-emitting laser with a first material that is disposed in one of the layers. The first material is configured as an absorbent material or emission material to light propagating in the optical resonator. As an absorbent material, the first material absorbs light when exposed to radio frequency (RF) radiation at one or more resonant frequencies. As an emission material, the first material intensifies light when exposed to RF radiation at one or more resonant frequencies. The resultant intensity change can be detected and used to determine characteristics of an external magnetic field.