111 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 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.

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.

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.

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.

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.

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.

An adaptable, multistage, multi-rate digital predistortion system that can increase the accuracy of the distortion applied to a power amplifier input signal is disclosed. Further, the digital predistortion system can be implemented using a reduced circuit area by reducing a number of coefficients used by the models applied to generate the distortion compensation signal. Further, the system can implement an improved digital predistortion adaptation engine that improves an adjacent channel leakage ratio of the digital predistortion system. Moreover, the system can compensate for non-linear impairments due to analog / RF circuits and systems and improve at least the following metrics: Error vector magnitude (EVM), adjacent channel leakage ratio (ACLR), spectrum emission mask (SEM), and power consumption of the circuits and systems. An example of circuits and systems is radio frequency power amplifier (RF PA).

A radar system includes: radars arranged in a spatially separated manner and including transmission and reception antennas for a radar signal; a local oscillator for providing a reference signal; and a processor for estimating an azimuth of an object. Each radar includes: an RF circuit for processing a signal in a same frequency band as the radar signal to generate an IF signal; and a BB circuit for processing the IF signal. The processor includes: a delay time calculation unit for calculating delay times of the RF circuit and BB circuit between radars based on a measurement result of the object; a phase error correction unit for correcting a phase of the IF signal based on the delay times; and an azimuth estimation unit for estimating the azimuth of the object based on a corrected IF signal.

An electronic device may include at least one communication processor, at least one radio frequency integrated circuit (RFIC) configured to provide a radio frequency (RF) signal based on a signal from the at least one communication processor, and a first RF circuit and a second RF circuit configured to process and provide the RF signal. The at least one communication processor may be configured to control at least part of the electronic device to allow the first RF circuit to process at least one first RF signal provided from the RFIC, in an over-temperature state, identify that a sum of times when the first RF circuit processes the at least one first RF signal is at least the value of a designated period, and based on the sum of the times when the first RF circuit processes the at least one first RF signal being at least the value of the designated period, stop use of the first RF circuit and control at least part of the electronic device to allow the second RF circuit to process at least one second RF signal provided from the RFIC. Other various embodiments are possible as well.

This invention discloses an adaptive dual-mode direction backtracking system based on double frequency conversion, comprising a radio frequency (RF) circuit, a control circuit, a local oscillator (LOO), and an antenna array. The RF circuit amplifies, filters, and mixes the RF signals received by the antenna array to form signal transmission links in mixed-mode and Van Atta array modes. The control circuit provides unified control over the RF switches and the transmit / receive delays of each channel, and outputs control signals according to the operating mode switching requirements. The LEO generates and distributes a fixed LEO signal and an adaptive LEO signal to achieve frequency matching under different incoming wave frequencies. The antenna array receives external incoming wave signals and transmits direction backtracking signals, employing an adjacent transceiver unit interconnection method in mixed-mode and a centrally symmetrical array element interconnection method in Van Atta array mode. This invention enables stable direction backtracking under different incoming wave frequencies and different application scenarios.

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 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.

Disclosed herein is a wireless module that includes an oscillation circuit component and an RFIC mounted on a multilayer substrate. The oscillation circuit component includes a clock terminal and a first ground terminal. The RFIC has a second ground terminal that supplies a ground potential to a clock circuit therein and a third ground terminal that supplies a ground potential to an RF circuit therein. The multilayer substrate includes a first conductor layer positioned closest to the plurality of pad electrodes of the RFIC and including a first ground pattern connected to the first and second ground terminals and a second ground pattern connected to the third ground terminal. The first and second ground patterns form a gap between the second and third ground terminals in a plan view as viewed in a stacking direction of the multilayer substrate.

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.

Achieving high gain and low noise in RF circuits. [Solution] A III-N dual gate device and a method for manufacturing a III-N dual gate device. An example semiconductor device includes a III-N back barrier, a III-N channel layer on the III-N back barrier, and a two-dimensional electron gas (2DEG) channel in the III-N channel layer. The semiconductor device includes a source contact and a drain contact, and includes a first gate contact and a second gate contact between the source contact and the drain contact. Between the first gate contact and the second gate contact, the semiconductor device includes an n+GaN contact coupled to the III-N channel layer in a connection region.

Provided is a radar system provided with: a local oscillator (30) that supplies a reference signal for generating a radar signal to radars (10, 20); and a processor (15) that estimates the orientation of the target on the basis of signals generated by the radars (10, 20), the radar being provided with: RF circuits (13, 23) that process signals having the same frequency band as radar signals and generate IF signals having a lower frequency than the radar signals; and a BB circuit (14, 24) for processing the IF signal, the processor being provided with: a delay time calculation unit (155) for calculating the delay time [Delta] tRF of the RF circuit and the delay time [Delta] tBB of the BB circuit between radars on the basis of the measurement result of the target; a phase error correction unit (156) that corrects the phase of the IF signal on the basis of the calculated delay times ([Delta] tRF, [Delta] tBB); and an orientation estimation unit (157) that estimates the orientation of the subject on the basis of the corrected IF signal.

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.

A self-tuning, resonant cavity transmitter combiner joins multiple RF transmitters and combines their signals onto a single transmission line. An additional tuning element is added to the junction of the signal paths to overcome the bandwidth limitations of the transmission lines joining the signal paths. An algorithm was developed to optimize the RF performance of the combiner by sampling the RF signals at various points in the RF circuit.

Radio frequency (RF) circuits and method of operating the same are disclosed. In some embodiments, the RF circuit includes an input terminal and an output terminal. A first filter path is connected between the input terminal and the output terminal the first filter path including an piezoelectric filter, a first filter and a second filter, wherein the piezoelectric filter is connected between the first filter and the second filter. The second filter path is connected between the input terminal and the output filter, wherein the second filter path includes a third filter and a fourth filter, wherein both the third filter and the fourth filter are of a second type of filter. The first type of filter is one of either a low pass a high pass type filter. The second type of filter is of another one of the low pass the high pass type filter.

In some embodiments, an apparatus for communication in a wireless network includes a radio frequency (RF) circuitry. The RF circuitry includes one or more transceivers and a signal booster. The signal booster is coupled to the one or more transceivers to provide boosted high frequency signal to the transceivers based on a local oscillator signal received via a transmission line. The signal booster includes an amplifier including a pair of transistors cross-coupled each other in cascode. This configuration results in a reduced impedance of the signal booster, thus provides an improved Q value for the high frequency signal provided to the transceivers, without incurring additional power consumption as in existing systems. The signal booster can be implemented in any access point or client device in a wireless communication network such as IEEE 802.11.

According to an embodiment, an electronic device includes: a memory storing instructions; at least one communication processor; and at least one RF circuit configured to process the RF signal on the basis of the signal from the at least one communication processor. The instructions, when executed by the at least one communication processor, may cause the electronic device to: identify, on a basis that the first event has been identified, whether a frequency band associated with the first event is a first frequency band; identifying whether a first parameter associated with transmission of the RF signal satisfies a first condition on the basis that the frequency band associated with the first event has been identified as the first frequency band; setting a first power to a transmit power of an RF signal associated with the first event on the basis of the first APT table, on the basis that the first parameter has been identified to satisfy the first condition; and changing the amplitude of the baseband signal transmitted to the RF circuit on the basis of the second APT table on the basis of having identified that the first parameter does not satisfy the first condition so as to set the second power to the transmit power of the RF signal associated with the first event.

An operating frequency regulation method for a radio frequency (RF) circuit, an operating frequency control circuit, and an RF power supply device are provided. The operating frequency regulation method for the RF circuit includes the following. The RF circuit is controlled to output to a load at different operating frequencies. A circuit parameter of the RF circuit during output of the RF circuit at each of the different operating frequencies is detected. A resonant frequency of the RF circuit is calculated based on the detected circuit parameter of the RF circuit during the output of the RF circuit at each of the different operating frequencies. An operating frequency of the RF circuit is regulated to the resonant frequency.

To provide a radio communication device, an information processing device, a system, and a program capable of suppressing battery consumption.SOLUTION: The beacon terminal 1 includes an acceleration sensor 14, an angular speed sensor 15, a RAM that stores measured acceleration and angular speed, a MCU11 that controls the acceleration sensor and the angular speed sensor to measure acceleration and angular speed every first period, stores first acceleration and first angular speed measured every first period in the RAM, controls the acceleration sensor and the angular speed sensor to measure acceleration and angular speed every second period shorter than the first period when a change in at least one of the acceleration and the angular speed is detected, and stores second acceleration and second angular speed measured every second period in the RAM, and an RF circuit 12 that wirelessly transmits the first acceleration and the second angular speed and the second acceleration and the second angular speed to the outside every first period.SELECTED DRAWING: Figure 2