1920results about "High frequency amplifiers" patented technology

Aspects of this disclosure relate to a bulk acoustic wave device that includes a multi-layer raised frame structure. The multi-layer raised frame structure includes a first raised frame layer positioned between a first electrode and a second electrode of the bulk acoustic wave device. The first raised frame layer has a lower acoustic impedance than the first electrode. The first raised frame layer and the second raised frame layer overlap in an active region of the bulk acoustic wave device. Related filters, multiplexers, packaged modules, wireless communication devices, and methods are disclosed.

The invention relates to the technical field of wireless communication, and provides a radio frequency power amplifier and a radio frequency chip, the radio frequency power amplifier comprises an input matching circuit, a first-stage amplifier, a first inter-stage matching circuit, a second-stage amplifier, a second inter-stage matching circuit, a third-stage amplifier and an output matching circuit which are electrically connected in sequence; the radio frequency power amplifier further comprises a control module, a direct current power supply module, a first bias circuit, a second bias circuit and a third bias circuit. The first biasing circuit comprises a power detection network and a switch control circuit; the first input end of the power detection network serves as the first input end of the first bias circuit, the second input end of the power detection network serves as the second input end of the first bias circuit, and the power detection network is used for receiving a radio frequency signal, converting the radio frequency signal into a control voltage in a detection mode and outputting the control voltage to the input end of the switch control circuit. The control switch controls connection or disconnection of the circuit. According to the invention, the robustness of power can be improved.

The invention relates to the technical field of electronic circuits, in particular to a low-noise amplification circuit and a radio frequency system. The low-noise amplification circuit at least comprises an amplification input circuit and an amplification output circuit, wherein at least one group of tail inductor structure is arranged in the amplification input circuit and the amplification output circuit; the first resonance circuit is of a closed structure, the first resonance circuit is in coupling connection with the tail inductor structure, and the first resonance circuit is used for discharging current generated by the tail inductor structure; the first resonance circuit at least comprises a secondary coil which is in coupling connection with a primary coil in the tail inductor structure; and the first end of the first capacitor module is electrically connected with the secondary coil. The invention provides a low-noise amplification circuit with higher working stability.

A power amplifier circuit includes a differential amplifier circuit configured to amplify a radio-frequency signal, a transformer disposed on an output side with respect to the differential amplifier circuit and including a primary winding and a secondary winding, and a dispersion circuit coupled to a midpoint of the primary winding of the transformer and configured to operate as an adjustment circuit. The dispersion circuit is configured to adjust, based on a supply voltage controlled in accordance with the envelope of the radio-frequency signal, a bias (bias current or bias voltage) to be supplied to the differential amplifier circuit.

The invention relates to the technical field of radio frequency signal management, in particular to a radio frequency power supply output power amplification coefficient analysis method and system, and the method comprises the following steps: obtaining the input power, voltage and current parameters of a radio frequency power supply amplifier, calculating the average value of the power supply output power, and analyzing the change trend of the power in a load state. Determining the operation state of the amplifier, and establishing a power output data set. According to the method, the running state of the amplifier is adjusted and optimized in real time by continuously tracking the average value of power output and carrying out detailed analysis on different load states, in addition, accurate adjustment of the amplification coefficient is ensured by quantitatively analyzing the power loss and the fluctuation range, and therefore the amplification effect is optimized, and the reliability of the amplifier is improved. The energy efficiency and the response capability of equipment are remarkably improved, challenges in a complex operation environment are effectively dealt with through fine power stability analysis and dynamic adjustment of an amplification coefficient, and continuous stability and high efficiency of power output are ensured.

Aspects of this disclosure relate to acoustic wave filters with bulk acoustic wave resonators. An acoustic wave filter can include a first bulk acoustic wave resonator configured to excite an overtone mode as a main mode and a second bulk acoustic wave resonator having a fundamental mode as a main mode.

The invention discloses a digital pre-distortion method, system and device and a storage medium, and relates to the technical field of aerospace communication. The method comprises the following steps: acquiring a first input signal and a first actual output signal of the power amplifier, and acquiring a thermal state characteristic; constructing a three-dimensional dynamic baseline; superposing the detection sequence into the first input signal to obtain a second input signal, obtaining a corresponding second actual output signal, and predicting an ideal output signal of the second input signal; extracting a harmonic component generated after the detection sequence passes through a power amplifier, and determining a distortion early warning moment; recording a third input signal after the distortion early warning moment; constructing a virtual test signal according to the third input signal, and predicting to obtain a reference output signal; and comparing the difference between the distortion output signal and the reference output to obtain a distortion feature vector, constructing a dynamic increment compensation function, and correcting the signal processing flow of the power amplifier based on the dynamic increment compensation function. And the accuracy of digital pre-distortion is improved.

The utility model relates to a radio frequency power amplification circuit with a harmonic suppression function and a radio frequency chip. The radio frequency power amplification circuit comprises an input matching unit, a first-stage power amplification unit, a first-stage bias unit, a first-stage power supply unit, an inter-stage matching unit, a second-stage power amplification unit, a second-stage bias unit, a second-stage power supply unit and an output matching unit. According to the utility model, the LC type trap circuits are designed and used in the power supply unit and the inter-stage matching unit, so that secondary, tertiary and high-order harmonic suppression is realized in the radio frequency power amplification circuit; meanwhile, based on LC circuit structures in the power supply unit and the inter-stage matching unit, the inter-stage matching bandwidth is widened, and the linearity of the multi-stage power amplification unit is improved.

Method and device(s) for supporting performance of machine learning based CFR and DPD on multiple digital input signals relating to different frequency bands, respectively, in order to signal condition said signals before power amplification and subsequent transmission in said frequency bands by a wireless communication network. The device(s) obtain said multiple digital input signals as complex valued signals. The device(s) perform feature construction that takes said multiple digital input signals as input and provides constructed feature signals according to predefined constructed feature types as output. Said predefined constructed feature types relate to at least the following per complex valued sample of the obtained complex valued multiple digital input signals the real part of the sample, the imaginary part of the sample and at least one of the absolute value of the sample and the phase of the sample.

An adaptable, generalized 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 can improve one or more of the following metrics of a complete radio frequency (RF) analog front-end radio signal chain: 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 a radio frequency power amplifier (PA).

The invention relates to a digital pre-distortion method and system based on a hierarchical iterative neural network, and belongs to the field of digital pre-distortion of power amplifiers. According to the method, the pre-distortion process is decoupled into two stages of off-line generalization training and on-line specialization optimization. In the offline stage, a mixed data set containing multiple modulation modes and bandwidths is adopted to train an offline neural network, and a basic model with high generalization ability is constructed; in the online stage, aiming at a signal with a specific modulation mode and bandwidth, a single configuration data set is utilized to train an online neural network, and the accurate compensation capability of the model on a real-time input signal is enhanced. In practical application, a baseband signal is firstly subjected to targeted preprocessing through the online neural network, then is subjected to deep optimization through the offline neural network, and finally is input into the power amplifier PA. According to the method, through a generalization-specialization double-layer structure, the dynamic response capability and compensation precision of a digital pre-distortion system to a complex signal environment are remarkably improved.

The invention relates to the technical field of wireless communication, and discloses a digital pre-distortion method for improving the linearity of a power amplifier in a phased array system, which comprises the following steps of: 1, acquiring a nonlinear parameter of the power amplifier under a dynamic load in real time, the nonlinear parameters comprise an input signal amplitude-phase characteristic, a temperature parameter and a quantum tunneling current parameter; 2, generating a pre-distortion compensation signal based on the nonlinear parameter, wherein the pre-distortion compensation signal comprises a quantum phase compensation item and a dynamic phase change compensation item; and step 3, superposing the pre-distortion compensation signal to an original input signal to generate a pre-distortion modulation signal. The linearity of the power amplifier is improved by introducing the quantum phase compensation item and the dynamic phase change compensation item, nonlinear parameters are accurately obtained in real time in a dynamic load environment, and the precision of pre-distortion compensation is improved.

The invention relates to the technical field of radio frequency generator circuits, and provides a phase-locking frequency-stabilizing multi-core control radio frequency system, which processes I / Q signals and constructs a multi-core task allocation and cooperation mechanism through a digital baseband processing module, and performs pre-distortion processing and system scheduling. The double-closed-loop control module is used for stabilizing fundamental frequency, correcting temperature drift and compensating and adjusting frequency swing amplitude; the hybrid power amplification module is used for performing multi-stage hybrid power amplification signal processing and temperature monitoring through a driving stage and output stage combined topology; and the feedback sampling network module collects output signals in real time through a directional coupler and feeds back, adjusts and precisely controls the frequency stability according to the output signals.

Aspects of this disclosure relate to acoustic wave filters with bulk acoustic wave resonators. An acoustic wave filter can include a first bulk acoustic wave resonator configured to excite an overtone mode as a main mode and a second bulk acoustic wave resonator having a fundamental mode as a main mode.

A radio-frequency (RF) circuit including: a multi-tone generation circuit configured to generate a multi-tone signal including a plurality of tones; a predistortion circuit configured to predistort the multi-tone signal or a modulation signal and output a predistortion signal; a power amplifier configured to amplify the predistortion signal and output an output signal; and a predistortion modeling circuit configured to model a predistortion model corresponding to the predistortion circuit based on the predistortion signal corresponding to the multi-tone signal and the output signal.

An improved architecture for a radio frequency (RF) power amplifier, impedance matching network, and selector switch. One aspect of embodiments of the invention is splitting the functionality of a final stage impedance matching network (IMN) into two parts, comprising a base set of off-chip IMN components and an on-chip IMN tuning component. The on-chip IMN tuning component may be a digitally tunable capacitor (DTC). In one embodiment, an integrated circuit having a power amplifier, an on-chip IMN tuner, and a selector switch is configured to be coupled to an off-chip set of IMN components. In another embodiment, an integrated circuit having an on-chip IMN tuner and a selector switch is configured to be coupled through an off-chip set of IMN components to a separate integrated circuit having an RF power amplifier.

Amplification circuitry is disclosed that couples neutralization transistors to amplification transistors to neutralize parasitic capacitance of the amplification transistors. Gates of a first amplification transistor and a first neutralization transistor are coupled together, and gates of a second amplification transistor and a second neutralization transistor are also coupled together. Drains of the first amplification transistor and the second neutralization transistor are coupled together, and drains of the second amplification transistor and the first neutralization transistor are also coupled together. Sources of neutralization transistors are coupled together at a node, such that a voltage swing of a first signal in the first neutralization transistor may be canceled by a voltage swing of a second signal in the second neutralization transistor. The node also couples to a resistor that prevents charge building in the neutralization transistors.

The invention relates to the technical field of radio-frequency signal processing, and discloses a 5G radio-frequency signal amplification method and system, and the method comprises the steps: decomposing an obtained radio-frequency signal into a high-frequency sub-band and a low-frequency sub-band through a multilayer wavelet packet, judging whether the radio-frequency signal is sparse in a wavelet packet domain, and carrying out the sparse reconstruction of an LI norm minimization problem if the radio-frequency signal is sparse; obtaining feature data of each sub-band, extracting a nonlinear transfer function of each sub-band through a CNN-GRU network, and carrying out transfer learning pre-training and dynamic adaptation updating; on the basis of dynamic adaptation update ending, layered memory polynomial calculation and layered model joint output construction, layered model parameter optimization is converted into a least square problem to obtain an error compensation function, and resource allocation is dynamically adjusted according to the peak-to-average power ratio of an input signal; and based on power amplifier state data, holographic sensing is performed on nonlinear parameters of the device through a fusion model, and dynamic changes of the device are compensated through multi-stage calibration and calibration delay is controlled.

Methods and devices to improve nonlinearity performance of low noise amplifiers (LNAs) are disclosed. The described methods and devices reduce the capacitive loading of the LNA amplifying devices on the bypass path of the LNAs when operating in the bypass mode. This is performed by decoupling the active devices from ground to put the amplifying devices in a floating state, thus minimizing the impact of the gate-source capacitances of the amplifying devices on the overall linear performance of the LNA operating in the bypass mode.

An impedance matching circuit includes a radiofrequency terminal and a series circuit connected to the radiofrequency terminal, wherein the series circuit comprises at least one reactance and at least one switching element having a drive input. A drive circuit is connected to the drive input and a coupler is connected to the drive circuit so as to an enable signal input. The impedance matching circuit enables short switching times and low losses in the at least one switching element.

A frontend circuit includes a wide-band filter, a transmit filter, and switches. The wide-band filter passes both the receive frequency band of a first communication frequency band and that of a second communication frequency band which is close to or overlaps that of the first communication frequency band. The transmit filter passes the transmit frequency band of the first or second communication frequency band. The switches are capable of simultaneously bringing, into conduction, at least two of multiple filters including the wide-band filter and the transmit filter. In carrier aggregation using the receive frequency bands of the first and second communication frequency bands, the switches simultaneously bring the wide-band filter and the transmit filter into conduction. Thus, in carrier aggregation using signals of multiple communication frequencies simultaneously in communication, attenuation of signals due to signal leakage in two receive frequency bands, which are close to each other, is suppressed.

The invention discloses a power amplifier, a chip and a radio frequency front end module, the power amplifier comprises a first power amplification circuit and a second power amplification circuit, the first power amplification circuit comprises a plurality of first amplification transistors connected in parallel, and the plurality of first amplification transistors are arranged along a first direction; the second power amplification circuit comprises a plurality of second amplification transistors connected in parallel, and the second amplification transistors are arranged in the second direction; wherein the first direction intersects with the second direction. Based on the power amplifier, the chip and the radio frequency front-end module provided by the invention, by arranging the first amplification transistor and the second amplification transistor along different directions, the layout of an internal circuit of the power amplifier is optimized, the area occupied by the power amplifier is reduced, and the miniaturization design of the radio frequency front-end module is facilitated.

The invention discloses a third harmonic suppression radio frequency transmitter, which comprises a gain boosting modulator, a third harmonic suppression filter and a power amplifier driver, and is characterized in that the gain boosting modulator is used for performing out-of-band noise suppression on an orthogonal baseband signal to obtain a radio frequency output signal; the third harmonic suppression filter is used for carrying out third harmonic suppression on the radio frequency output signal to obtain a radio frequency harmonic suppression signal, and the power amplifier driver is used for carrying out power amplification on the radio frequency harmonic suppression signal to obtain a radio frequency amplification signal and further sending the radio frequency amplification signal to an external load. The gain boosting modulator is driven by a first local oscillator signal with a first duty ratio, and the third harmonic suppression filter is driven by a second local oscillator signal with a second duty ratio. According to the invention, out-of-band noise generated by a baseband circuit and a mixer in a transmitting link can be effectively suppressed, a third harmonic term at a 3xfLO can be suppressed, a CIM3 nonlinear term is further suppressed, and the method can be widely applied to the technical field of wireless communication.

Disclosed is a technology related to a low noise amplifier applied between an RF receiver and an RF switch. A phase difference matching circuit having the same phase difference as a positive gain amplifier is added to an output terminal of an attenuator of a low noise amplifier having a variable gain switching structure. In addition, a variable impedance circuit connected to an output terminal of the positive gain amplifier and an output terminal of a phase difference matching unit to finely adjust the phase difference of each output terminal may be further included.

A power amplifier device includes a transistor die with an elongated bondpad coupled to a terminal of an integrated transistor. The device also includes a substrate formed from a stack of alternating dielectric and patterned conductive layers. An elongated die contact is exposed at a first substrate surface and is attached to the elongated bondpad to provide a uniform connection between the die contact and the elongated bondpad. A vertical interconnect structure is connected to the die contact and extends towards the second substrate surface. A circuit includes passive component(s) coupled to the second substrate surface and to the vertical interconnect structure. An encapsulation material layer covers the passive component(s) and the second substrate surface. A plurality of device interconnects are coupled to the substrate, electrically coupled to the power transistor die, and exposed at a contact surface of the power amplifier device.

The invention belongs to the technical field of signal processing, and particularly discloses a deep learning driven power amplifier predistortion method, which comprises the following steps: constructing a signal matrix of a target signal sequence, the target signal sequence being obtained by preprocessing an original time signal sequence collected from a signal source; sequentially inputting the signal matrix into a PDTRANS predistortion model and a power amplifier, and obtaining an output signal sequence of the power amplifier; determining a loss function value based on the output signal sequence and the target signal sequence, and adjusting hyper-parameters of a PDTRANS pre-distortion model based on the loss function value; the steps of obtaining the output signal sequence of the power amplifier and adjusting the hyper-parameters of the PDTRANS predistortion model are repeated until the loss function is minimized, and the trained PDTRANS predistortion model matched with the power amplifier is obtained; and performing pre-distortion compensation on the power amplifier based on the trained PDTRANS pre-distortion model. According to the invention, accurate pre-distortion modeling of the power amplifier is realized.

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.

The embodiment of the invention provides a power amplifier, a radio frequency module and electronic equipment. The power amplifier comprises a signal input end, a signal output end and a plurality of tube cores which are connected in parallel; the tube core comprises electrode finger strips extending along a first direction, and the electrode finger strips comprise a grid electrode finger strip, a source electrode finger strip and a drain electrode finger strip; in the second direction, the signal input end and the signal output end are located on the two sides of the multiple tube cores respectively, and the second direction is perpendicular to the first direction. The extension direction of the electrode finger strips is perpendicular to the signal input / output direction, so that the performance of the electrode finger strips can be optimized to the maximum extent and the requirement of high power can be met under the limited layout area, and the flexible possibility is created for the circuit architecture design.

Disclosed in the present invention are a power amplifier module for implementing average power protection, an electronic device, and a method. The power amplifier module comprises: a controller, configured to provide logic control and bias voltage for a radio frequency power amplifier; the radio frequency power amplifier, configured to amplify the power of a radio frequency signal and then output the amplified radio frequency signal to a filter; and a filter for frequency bands, configured to filter the amplified radio frequency signal to obtain a radio frequency signal of a required specific frequency band. When the detected power of the radio frequency power amplifier is greater than or equal to a first power threshold, and the time during which the detected power is greater than or equal to the first power threshold reaches a first time threshold, the power amplifier module enters an average power protection operating mode, and the controller adjusts the gain of a power amplification unit, so as to protect the filter in the power amplifier module from being burnt out.

The invention provides a radio frequency power amplifier circuit and radio frequency power supply equipment. The radio frequency power amplifier circuit comprises a direct current source, a radio frequency inversion unit, a coupling unit and a power adjusting unit. The direct-current source is used for outputting direct-current electric energy. The radio frequency inversion unit is connected with the direct current source, and the radio frequency inversion unit is used for receiving the direct current electric energy and inverting the direct current electric energy into radio frequency electric energy. The coupling unit comprises a first winding and a second winding which are coupled, the first winding is connected with the radio frequency inversion unit, the second winding is used for being connected with a load, and the coupling unit is used for coupling and outputting radio frequency electric energy to the load. The power adjusting unit is connected between the radio frequency inversion unit and the first winding or between the second winding and a load, and the power adjusting unit is used for reducing the current value of radio frequency electric energy output by the radio frequency inversion unit or reducing the current value of radio frequency electric energy output by the coupling unit in a coupling mode. Therefore, the current value of the radio frequency electric energy provided to the load is reduced. According to the invention, the radio frequency power amplifier circuit can be protected.