170 results about "Rf circuit" patented technology

A circuit simulation method partitions circuits into linear and nonlinear subcircuits, obtains frequency responses of the linear portion, and applies causality-enforcing corrections to eliminate non-physical artifacts from band-limited data. The corrected responses enable construction of equivalent circuit models using voltage / current sources with passive elements, where source values update via convolution with port histories. This approach improves simulation accuracy and stability compared to direct frequency-inverse methods while maintaining compatibility with standard platforms including SPICE, PSCAD, and Simulink. Applications include power system transients, RF circuits, and high-speed digital interfaces.

A packaged integrated circuit device includes a die that includes integrated radio frequency (RF) circuitry. The packaged integrated circuit device also includes a package substrate including metal layers electrically connected to the RF circuitry. The packaged integrated circuit device further includes an impedance adapter electrically connected to the RF circuitry and disposed between the die and the package substrate. The impedance adapter includes a passive component disposed on or in a body of the impedance adapter.

A communication system for inventory management via wireless monitoring comprises radio frequency identification (RFID) tags configured to operate in a frequency band that is unlicensed in a first geographic region and is licensed in a second geographic region. The communication system also comprises a RFID reader designed according to operational parameters of the first geographic region. The RFID reader is configured to read, in the second geographic region, data from the RFID tags via radio frequency (RF) signal transmissions in the frequency band at a power level that exceeds the operational parameters of the first geographic region. The RFID reader comprises a RF circuit, an antenna, and a controller. The controller is configured to program the RF circuit with second operational parameters, which cause the RFID reader to operate outside of requirements for operation in the unlicensed frequency spectrum in the first geographic region as defined by the operational parameters.

The invention belongs to the technical field of integrated circuits, and relates to an automatic design optimization method suitable for a large-scale analog / radio frequency circuit, which comprises the following steps of: hierarchically dividing the large-scale analog / radio frequency circuit into a plurality of circuit modules; carrying out random sampling to obtain an initial data set, and establishing a Pareto frontier model of a lower-layer circuit module; the optimization of the performance index of the system circuit is converted into the optimization of the performance index of the lower circuit module; obtaining a'pseudo 'Pareto optimal point near the optimal performance index of each current lower-layer circuit module by using an improved evolutionary algorithm; updating the Pareto front of the lower layer module by using the extracted Pareto optimal point, and performing constraint mapping calculation until the Pareto front of the current lower layer module is partially overlapped with the actual Pareto front; and solving a design variable of the lower-layer circuit module by using the output optimal performance index of the lower-layer module. According to the method, good circuit performance indexes can be obtained with fewer SPICE simulation times, and the cost of automatic design of a large-scale analog / radio frequency circuit is reduced.

Device structures and fabrication methods for MOSFETs having a novel multiple-conductive layer “T”-shaped gate (as viewed in cross-section). The novel “T-gate” significantly decreases the gate resistance RG of a MOSFET device and thus increases the figure-of-merit fMAX (the maximum device oscillation frequency, or the frequency at which the maximum power gain equals unity) and reduces the noise factor (NF) of the device. Fabrication of the novel MOSFET devices may be readily integrated into existing IC fabrication processes, and such MOSFETs may have gate lengths Lg scaled below the lithographic capabilities of the fabrication process. Some embodiments include conformal gate side-spacers. Some embodiments include non-conformal air-gapped gate side-spacers that result in reduced parasitic gate-to-source capacitance CGS and gate-to-drain capacitance CGD, with concomitant improved performance at high radio frequencies (RF). Embodiments of the novel MOSFET device enable RF circuits, such as low-noise amplifiers (LNAs), to exhibit a better noise figure parameter, NFmin.

A device for providing a magnetic treatment by evoking muscle contraction by a time-varying magnetic field and providing a RF treatment by heating biological structure. The device may provide a pressure treatment. The device includes an applicator having an RF electrode and a magnetic field generating device. The device may also include a main unit, a human machine interface, and a control unit. The control unit adjusts a signal provided to the RF electrode and creates an RF circuit, and also adjusts the signal provided to the magnetic field generating device and creates a magnetic circuit electrically insulated from the RF circuit. The RF circuit may include a power source and a power amplifier, and the magnetic circuit may include an energy storage to supply the magnetic field generating device with electric current.

According to one embodiment, an electronic device may be provided, the electronic device comprising an RF circuit and a communication processor operatively connected to the RF circuit, wherein the RF circuit comprises at least one reception circuit, at least one transmission circuit, a first VCO, a second VCO, and a signal detection block electrically connected to the first VCO, and the communication processor is configured to control the RF circuit to change the operating frequency of the second VCO on the basis of determining whether a signal output from the first VCO is an abnormal signal. Various other embodiments may be possible.

An electronic device is provided. The electronic device includes a radio frequency (RF) circuit, memory, comprising one or more storage media, storing instructions, and at least one processor communicatively coupled to the RF circuit and the memory, wherein the instructions, when executed by the at least one processor individually or collectively, cause the electronic device to establish a first Internet packet data network (PDN) connection associated with a first subscriber identity module (SIM), and, based on the first Internet PDN connection, perform a registration procedure with a second Internet protocol (IP) multimedia subsystem (IMS) connected to a second communication network, and wherein the first SIM is used for attaching to a first communication network and a second SIM is used for attaching to the second communication network.

The present disclosure provides a phased array antenna module loaded with metamaterials, an RF circuit, and a 5G mobile device. The module includes a millimeter-wave RF module with at least one emission surface and an arc-shaped metamaterial structure featuring multiple stacked layers, each with periodically distributed metallic unit structures. Each concave surface of the metamaterial structure aligns with the corresponding emission surface, and the metallic unit structures in the same layer are of equal size. Across layers, these structures are arranged in a one-to-one correspondence, with sizes sequentially increasing or decreasing along the stacking direction. This configuration improves gain, expands scanning angles, and minimizes scanning loss, offering enhanced performance and seamless integration with modern 5G devices.

An adjustable power divider circuit capable of implementing an arbitrary polarization mode is disposed between a radio-frequency (RF) circuit and at least one antenna element, and includes an input signal portion, at least two signal control portions, a processing unit, and at least one orthogonal coupler. The input signal portion can convert the RF circuit's RF signal(s) into input signals and send the input signals to the signal control portions. The signal control portions can convert the input signals into control signals based on the processing unit's instructions and send the control signals to the orthogonal coupler. The orthogonal coupler can generate two output signals having a 90-degree phase difference therebetween, and send the output signals to the antenna element. Accordingly, based on actual product needs, the adjustable power divider circuit can make the antenna element enter a polarization mode that is linear in an arbitrary direction, circular, elliptical, etc.

Various embodiments for die stacking are disclosed in the present disclosure for improved performance in RF circuit integration and packaging. In various layouts, a first die may be flipped and stacked on a second die via one or more bumping pillars coupled between the dies. The bumping pads may be disposed on the first die, the second die, or both. The bumping pads may comprise ground bumping pads for ground connection, RF signal bumping pads for cross-die RF signal transmission, and / or control bumping pads for biasing or logic control. Furthermore, the ground bumping pads and the RF signal bumping pad may form a ground-signal-ground pad structure for smooth RF signal transmission. The present embodiments may integrate a silicon-based die with an III-V semiconductor-based die together for a small form factor package with the well-defined ground to handle RF signals over millimeter-wave frequencies at high power levels.

Certain aspects of the present disclosure provide techniques for multi-stage impedance tuning for a radio frequency (RF) transmitter. An example apparatus includes RF circuitry comprising an amplifier, an impedance tuning circuit coupled to an output of the amplifier, and an antenna tuner coupled between an antenna feed and an output of the impedance tuning circuit. The apparatus further includes one or more memories and one or more processors coupled to the one or more memories. The one or more processors are configured to cause the apparatus to configure at least one parameter of the impedance tuning circuit or the amplifier based at least in part on at least one load characteristic at the antenna feed; and communicate one or more signals via the RF circuitry while the at least one parameter is configured based at least in part on the at least one load characteristic at the antenna feed.

Single band and multiband wireless antennas are an important element of wireless systems. Competing tradeoffs of overall footprint, performance aspects such as impedance matching and cost require not only consideration but become significant when multiple antenna elements are employed within a single antenna such as to obtain circular polarization transmit and / or receive. Accordingly, it would be beneficial to provide designers of a wide range of electrical devices and systems with compact single or multiple frequency band antennas which, in addition to providing the controlled radiation pattern and circular polarization purity (where required) are impedance matched without substantially increasing the footprint of the antenna and / or the complexity of the microwave / RF circuit interfaced to them, whilst supporting multiple signals to / from multiple antenna elements in antennas employing them. Solutions present achieve this through provisioning one or more capacitive series reactances discretely or in combination with one or more shunt capacitive reactances.

The invention discloses a data optimization method and system and a computing device cluster. After the data optimization system receives the physical attribute parameters of the passive device, feature extraction is carried out on the physical attribute parameters of the passive device, and poles, residuals and constant terms forming a scattering parameter frequency response curve of the passive device are obtained. The data optimization system calculates a scattering parameter frequency response curve of the passive device according to different frequencies, poles, residuals and constant terms in a set frequency range, performs passivity correction on the scattering parameter frequency response curve of the passive device, filters abnormal values in the scattering parameter frequency response curve of the passive device, or corrects the abnormal values, and finally performs passive correction on the scattering parameter frequency response curve of the passive device. And the curve is smoother. The scattering parameter of the scattering parameter frequency response curve of the passive device output by the data optimization system meets the physical property constraint. A designer selects the most suitable passive device for the radio frequency circuit based on the performance parameters of the passive device meeting the physical property constraint, so that the performance of the designed and developed radio frequency circuit is optimal.

The invention relates to the field of network communication, in particular to a sensing information acquisition method and device, computer equipment and a storage medium, which can freely set and control the transmitting power and the peak-to-average power ratio under the condition of ensuring the performance of radar and communication, obtain a communication sensing integrated signal and improve the communication sensing efficiency. According to the invention, efficient sharing of frequency spectrum sub-band resources and transmitting power is realized, the utilization rate of the frequency spectrum resources is maximized, the negative influence of radio frequency circuit transmitting signal distortion caused by the fact that echo signal noise power may be greater than echo power is reduced as much as possible, and the requirement of information perception in a longer distance is met.

An RF circuit is disclosed that may include a driver stage. The driver stage may include a gate bias circuit configured to receive a variable voltage supply signal; and an amplifier stage comprising a FET, wherein the gate bias circuit is configured to adaptively convert the variable voltage supply signal into a bias signal. The RF circuit may further include a circuit component configured to combine the bias signal and a radio frequency input signal to generate a combined signal, and wherein the amplifier stage is configured to receive the combined signal at a gate of the FET and to produce an intermediate output, and wherein the gate bias circuit is configured to generate the bias signal such that the bias signal increases as the variable voltage supply signal decreases to compensate for a tendency of a current through the FET to decrease as the variable voltage supply signal decreases.

Certain aspects of the present disclosure provide techniques and apparatus for calibrating radio frequency (RF) circuits using machine learning. One example method generally includes calibrating a first subset of RF circuit calibration parameters. Values are predicted for a second subset of RF circuit calibration parameters based on a machine learning model and the first subset of RF circuit calibration parameters. The second subset of RF circuit calibration parameters may be distinct from the first subset of RF circuit calibration parameters. At least the first subset of RF circuit calibration parameters is verified, and after the verifying, at least the first subset of RF circuit calibration parameters are written to a memory associated with the RF circuit.

Disclosed is an electronic device comprising a neural processing unit (NPU), an RF circuit connected to at least one antenna, a modem for cellular communication, and a shared memory. The NPU may obtain, from the shared memory, time-sensitive input information and non-time-sensitive input information obtained from the modem and a sensor fusion module and stored in the shared memory, input the time-sensitive input information and the non-time-sensitive input information to a multi-modal deep learning algorithm and thereby generate output information for use in operating the RF circuit and the modem, and store the output information in the shared memory in order to make the RF circuit and the modem operate according to the output information.

A antenna structure is arranged on a circuit board, a first surface of the circuit board includes an RF circuit, and the antenna structure includes: a metal screw, fixed on the first surface through a metal hole; the metal hole forms a metal ring; a plastic column, set above the metal screw; a metal tube, embedded with the plastic column, wherein there is a first predetermined distance between the metal tube and the metal screw; a metal shrapnel, extending from a bottom of the metal tube, wherein the metal screw is electrically connected to the RF circuit or the metal tube is electrically connected to the RF circuit to enable the metal screw and the metal tube to transmit or receive signals. The present disclosure also provides an electronic device, and the metal screw also uses to fix the circuit board to the housing of the electronic device.

A radar device includes a frequency modulated continuous wave (FMCW) generator, a radio frequency (RF) circuit, a computing circuit, and a coherent subtractor. The FMCW generator is configured to generate an FMCW signal. The RF circuit is configured to modulate the FMCW signal into an RF signal and demodulate a reflection signal reflected at a target from the RF signal, so as to obtain a received signal. The computing circuit is configured to reconstruct a short-range leakage signal according to the FMCW signal and an estimated channel coefficient, a delay coefficient, a phase coefficient, and an amplitude coefficient obtained in a short-range leakage estimation stage of the radar device. The coherent subtractor is configured to compensate the received signal by the reconstructed short-range leakage signal.

This invention provides an automatic method and system for generating analog circuits. The circuit partitioning step divides the radio frequency (RF) circuit into multiple circuit units. The circuit segmentation step converts each circuit unit into multiple circuit segments. Each circuit segment includes at least one main component data and at least one peripheral component data. The main component model establishment step establishes a main component model, which corresponds to the main component data of each circuit segment. The circuit segment model establishment step establishes a circuit segment model, which corresponds to each circuit segment. The model combination step combines the main component model corresponding to each circuit segment with the circuit segment model to generate the analog circuit. This automatically converts the RF circuit into an analog circuit suitable for analog software.

According to an embodiment, an electronic device may comprise an RF circuit and at least one processor. The at least one processor may be configured to allocate a first RF path of the RF circuit to a first network communication corresponding to a first SIM during a first period and a second network communication corresponding to a second SIM during a second period, wherein the first SIM is activated during the first period and the second SIM is activated during the second period. The at least one processor may be configured to identify an occurrence of a timer start event associated with a disconnection of the second network communication. The at least one processor may be configured to start a timer having information about an area to which the electronic device is connected within the second network communication and / or an expiration time corresponding to the timer start event, based on identifying the occurrence of the timer start event. The at least one processor may be configured to perform a TAU procedure based on elapse of the expiration time of the timer. Other various embodiments are possible as well.

An RF circuit that has the following: a charge pump (68) configured to generate current pulses having a first current amplitude (i CP0 ) and a predetermined duration (T ON ) to generate a capacitive element (C) coupled to the charge pump (68) and configured to receive the current pulses and, depending thereon, to generate a tuning voltage (V TUNE ) to generate an RF oscillator (61) coupled to the capacitive element (C) and configured to generate an RF signal (s LO (t)) with a frequency (f LO ) which is dependent on the tuning voltage (V FINE ) depends; a measuring circuit (63; 71) which is designed to generate a measuring signal (V1, V2, V 2A , V 2B , f1, f2) which determines the tuning voltage (V FINE ) or the frequency (f LO ) of the RF signal (s LO (t)) represents; a controller circuit (50) coupled to the charge pump (68) and the measuring circuit (63; 71) and configured to: to control the charge pump (68) in such a way as to obtain the first amplitude (i CP0 ) of a current pulse by a current difference (Δi; Δi A , Δi B ) and a first change (ΔV1; Δf1) of the measurement signal, which is a reaction to a first current pulse of the current pulses with the first current amplitude (i CP0 ) and a second change (ΔV2; ΔV 2A , ΔV 2B ; Δf2) of the measurement signal, which is a reaction to a second current pulse of the current pulses with changed current amplitude (i CP0 +Δi) is to be determined, and based on the first change (ΔV1; Δf1) of the measurement signal and the second change (ΔV2; ΔV 2A , ΔV 2B ; Δf2) of the measuring signal and the current difference (Δi) a measured value for the first amplitude (i CP0 ) to calculate.

According to an example embodiment, an electronic device includes a communication processor including processing circuitry, RF circuitry connected to the at least one communication processor, and a plurality of antennas connected to the RF circuitry. The communication processor is configured to control the RF circuitry to provide a first RF signal corresponding to a specified frequency band to the first antenna based at least in part on the portable communication device being fully unfolded. The communication processor is configured to control the RF circuitry to provide a second RF signal corresponding to the specified frequency band to the second antenna instead of the first antenna based at least in part on the portable communication device being fully folded.

This application relates to a radio frequency (RF) system, a coexistence communication method, a communication device, and a readable storage medium. The RF system includes: a first RF circuit for operating in a first frequency band and power-coupled to output a first coupled signal; a second RF circuit for operating in a second frequency band and power-coupled to output a second coupled signal; and a processing circuit connected to both the first and second RF circuits, configured to, in the event of adjacent-channel interference between the first RF signal in the first frequency band and the second RF signal in the second frequency band, reduce the transmission power of the interfering signal and increase the reception power of the interfered signal according to the type of interference, thereby effectively reducing mutual interference between the first RF signal and the second RF signal (e.g., Wi-Fi communication and cellular communication) when they coexist without sacrificing the effective operating bandwidth of the first and second RF signals.

A system for filter enhancement, preferably including one or more analog taps and a controller, and optionally including one or more couplers. The system is preferably configured to integrate with a filter, such as a passband filter or other frequency-based filter. The system can be configured to integrate with an RF communication system, an RF front end, or any other suitable RF circuitry. A method for filter enhancement, preferably including configuring one or more analog taps, and optionally including calibrating a system for filter enhancement and / or receiving temperature information.

The present teachings generally relate to generating a pseudo-barrier via an axial RF field. A first voltage is applied to a first pair of rods arranged in a multi-pole configuration, a second RF voltage is applied to a second pair of rods, and a difference between magnitudes and / or phases of the first and second RF voltages is adjusted. As discussed in more detail herein, such a pseudo-barrier may be employed in a variety of different applications. As an example, such a pseudo-barrier may be used to trap ions within a rod group that includes a plurality of rods arranged in a multi-pole configuration. In other applications, adjusting the height of the pseudo-potential barrier established in the rod set along with the application of a DC potential between the rod set and an external electrode can be used to cause mass-selective extraction of ions trapped within the rod set. In other applications, such a pseudo-barrier may be employed in a multiplexing method to perform mass spectrometry.

An electronic device comprises a housing having an internal surface, a circuit board within the housing, an RF circuit mounted on the circuit board and an antenna formed on the housing. A positioning member is formed on the internal surface of the housing, and it engages and positions the circuit board. A first RF coupling portion is formed on the positioning member, and electrically connects to the antenna and a second RF coupling 5 portion is formed on the circuit board and electrically connects to the RF circuit. When the circuit board is fitted to the positioning member, the second RF coupling portion is aligned with, and RF coupled to, the first RF coupling portion so as to provide a RF coupling between the antenna and the RF circuit, characterized in that said first RF coupling portion is adapted to provide the RF coupling as the feed of the antenna structure.

The invention provides an overlapping automatic review system and method suitable for a three-dimensional PCB, the system comprises a user interaction module, a data extraction engine, a core review engine and a result generation and report module, and the method comprises the following steps: receiving review configuration information input by a user; extracting related design data from the PCB design file according to the examination type; executing overlapping review operation, including performing electrical rule conformity judgment on wires and shapes in the same layer and / or adjacent layers of the PCB; and generating and outputting an examination result. The inspection types include high-voltage circuit breakdown inspection, Kelvin connection identification, digital signal crosstalk inspection, radio frequency circuit green oil windowing inspection and crystal oscillator adjacent layer digging inspection. According to the method, efficient three-dimensional stacking inspection is realized through a spatial index optimization algorithm, the problems of single inspection dimension, low efficiency and lack of special electrical rule inspection in the prior art are solved, and the reliability and the inspection efficiency of PCB design are remarkably improved.

The invention discloses a dielectric logging antenna assembly of a multi-frequency-point matching network. According to the dielectric logging antenna assembly, a medium matching layer is installed on a metal pressure-bearing shell; the transmitting antenna and the receiving antenna are arranged in the metal pressure-bearing shell; the transmitting antenna and the receiving antenna are externally connected to a transmitting or receiving circuit of the logging instrument at the same time. According to the invention, the transmitting antenna and the receiving antenna can be effectively protected from being influenced by liquid in a well in an underground high-pressure environment. Meanwhile, the dielectric matching layer can provide pressure-bearing sealing for the antenna aperture and ensure that an electromagnetic wave radiation channel is formed between the antenna and the stratum. The antenna radiation impedance and the radio frequency circuit impedance can be effectively matched through the antenna radiation metal body, the metal pole plate via hole, the antenna feed port, the insulating dielectric layer and the metal pole plate, so that the radiation and signal receiving efficiency of the antenna is effectively improved.