125 results about "Radio frequency power transmission" patented technology

Disclosed is a system for power transmission. The system includes a receiver having a receiver antenna. An RF power transmitter includes a transmitter antenna. The RF power transmitter transmits RF power. The RF power includes multiple polarization components. The receiver converts the RF power to direct current. Also disclosed is an antenna for an RF power transmission system. The antenna includes at least two antenna elements. Alternating the radiation between the at least two antenna elements produces a power transmission having components in two polarizations. Additionally disclosed is a transmitter, a receiver and a method for power transmission.

Disclosed is an RF power transmission network. The network includes at least one RF power transmitter, at least one power tapping component, and at least one load. The at least one RF power transmitter, the at least one power tapping component, and the at least one load are connected in series. The RF power transmitter sends power through the network. The power is radiated from the network to be received by a device to be charged, re-charged, or directly powered by the power.

An electrode is exposed to a plasma generation volume and is defined to transmit radiofrequency power to the plasma generation volume, and includes an upper surface for holding a substrate in exposure to the plasma generation volume. A gas distribution unit is disposed above the plasma generation volume and in a substantially parallel orientation to the electrode. The gas distribution unit includes an arrangement of gas supply ports for directing an input flow of a plasma process gas into the plasma generation volume in a direction substantially perpendicular to the upper surface of the electrode. The gas distribution unit also includes an arrangement of through-holes that each extend through the gas distribution unit to fluidly connect the plasma generation volume to an exhaust region. Each of the through-holes directs an exhaust flow from the plasma generation volume in a direction substantially perpendicular to the upper surface of the electrode.

An electrode is exposed to a plasma generation volume and is defined to transmit radiofrequency power to the plasma generation volume, and includes an upper surface for holding a substrate in exposure to the plasma generation volume. A gas distribution unit is disposed above the plasma generation volume and in a substantially parallel orientation to the electrode. The gas distribution unit includes an arrangement of gas supply ports for directing an input flow of a plasma process gas into the plasma generation volume in a direction substantially perpendicular to the upper surface of the electrode. The gas distribution unit also includes an arrangement of through-holes that each extend through the gas distribution unit to fluidly connect the plasma generation volume to an exhaust region. Each of the through-holes directs an exhaust flow from the plasma generation volume in a direction substantially perpendicular to the upper surface of the electrode.

A radio frequency (RF) amplifier system includes an RF power amplifier having an input and an output, and a typical gain of 1000 or more between the input and the output. An adaptive feedback channel is coupled between the input and the output of the RF power amplifier. The adaptive feedback channel receives as inputs audio signals for modulation of the input of the RF power amplifier, a frequency command word indicative of a desired frequency and phase of the RF amplifier system, and a control word indicative of a desired power level of the output of the RF power amplifier and of a mode of operation of the RF amplifier system. In response to the inputs, the adaptive feedback channel provides as an output a degenerative feedback signal to the input of the RF power amplifier.

An amplitude component and a phase component among modulating signals are supplied into a radio frequency wave input terminal and a power supply terminal of a radio frequency power amplifier, respectively, and an original modulated wave is obtained from an output of the radio frequency power amplifier. The output of the radio frequency power amplifier is detected by an output detecting section, correction data to a detection voltage closest to the detection voltage among correction datatables which have been measured in various temperature environments and stored in advance are selected by a selector, and correction of an amplitude component and a phase component is performed by phase-amplitude correction means. Thereby enabling EER operation without spectrum degradation.

A method and a supply modulator (SM) are provided for supplying power from a wireless transmitter to a radio frequency (RF) power amplifier. A power control signal input from a modem is received. A reference voltage is determined. An operating mode of the SM is changed by controlling a level of the reference voltage. A voltage is determined based on the level of a reference voltage. When the operating mode of the SM is an ET mode, a first output signal from a linear regulator and a second output signal from a switching regulator are combined to obtain a combined result, and the combined result is output. The first output signal is based on the voltage. When the operating mode of the SM is an APT mode, the voltage based on the reference voltage is output.

The invention provides a radio frequency front-end circuit structure, which comprises a receiver radio frequency front-end and a transmitter radio frequency front-end. A first switching tube is joined between a low noise amplifier in the receiver radio frequency front-end structure and an impedance matching network, a second switching tube is joined between the low noise amplifier and a power supply, a third switching tube is joined between a radio frequency power amplifier in the transmitter radio frequency front-end structure and the impedance matching network, and a fourth switching tube is joined between the radio frequency power amplifier and the power supply. Enablement of all the above-mentioned switching tubes is controlled by enable signals generated by a digital baseband, and the low noise amplifier and the radio frequency power amplifier employ the same off-chip inductor, which is connected with a receiving antenna. The radio frequency front-end circuit structure in the invention is simple without a duplexer and guarantees the proper functioning of a transceiver in two states; has only one off-chip inductor instead of two, thereby reducing the cost and area of passive devices; and guarantees all the performances of the transceiver.

Disclosed is an RF power transmission network. The network includes at least one RF power transmitter, at least one power tapping component, and at least one load. The at least one RF power transmitter, the at least one power tapping component, and the at least one load are connected in series. The RF power transmitter sends power through the network. The power is radiated from the network to be received by a device to be charged, re-charged, or directly powered by the power.

The invention discloses a self-adaptive digital pre-distortion linear system of a radio frequency power amplifier, comprising a base band processing module, a digital pre-distortion compensation module and a radio frequency power amplifier; the digital pre-distortion compensation module is connected to the middle of the base band processing module and the radio frequency power amplifier and used for bettering the distortion caused by the nonlinearly amplification of the radio frequency power amplifier. The invention provides the complete and optimized self-adaptive digital pre-distortion linear system structure of the radio frequency power amplifier capable of supporting various pre-distortion models; the invention has the advantages of being wide in applicable range, simple in structure and lower in implement cost at the fixed point.

The invention provides an envelope tracking radio frequency power amplifier which comprises an input direction coupler, an envelope signal detection circuit, an envelope signal amplifier, a delay component, a clamping circuit and a radio frequency power amplifier body. Input signals are divided into two parts through the input direction coupler; one part of input signals pass through the envelope signal detection circuit, the envelope signal amplifier and the clamping circuit and then provide bias for the radio frequency power amplifier body; the other part of input signals pass through the delay component, so that the bias voltage of the radio frequency power amplifier body and the input signals are completely synchronous; finally, real-time envelope tracking is achieved. The envelope signal amplifier amplifies the envelope signals, so that the envelope signals are large enough to provide bias for the radio frequency power amplifier body. The clamping circuit limits the amplitude value of the amplified signals amplified by the envelope signal amplifier, and reduces the distortion of the envelope tracking radio frequency power amplifier. All the components of the envelope tracking radio frequency power amplifier can be designed to work at wide frequency, and can meet multiple wireless communication standards.

The invention provides a fabrication plant for high density plasma, which comprises a processing room, a reaction gas refiller, an inductively coupled plasma antenna, a wave guide and an annular transmitting tube. A susceptor used for supporting the objects for processing is arranged within the processing room. A dielectric window is arranged on the processing room. The reaction gas refiller injects the reaction gases into the processing room. The inductively coupled plasma (ICP) antenna is arranged on the dielectric window to be positioned in the center of the dielectric window, and transfers the radio-frequency power from a radio-frequency power supply into the processing room. The wave guide guides the microwave generated by a microwave oscillator. The annular transmitting tube is arranged on the dielectric window to surround the inductively coupled plasma antenna, connected with the wave guide, and radiates microwave into the processing room via a plurality of incisions formed in the soleplate of the annular transmitting tube.

Embodiments of the present invention include a method and system for control of a multiple-input-single output (MISO) device. For example, the method includes determining a change in power output level from a first power output level to a second power output level of the MISO device. The method also includes varying one or more weights associated with respective one or more controls of the MISO device to cause the change in power output. The one or more controls can include one or more of (a) a phase control of one or more input signals to the MISO device, (b) a bias control of the MISO device, and (c) an amplitude control of the input signals to the MISO device

Envelope tracking (ET) methods and systems for controlling the delivery of power to radio frequency power amplifiers (RFPAs). An exemplary ET system includes an RFPA and a wide bandwidth capable and power efficient envelope modulator that includes a first power supplying apparatus and a second power supplying apparatus. The first power supplying apparatus includes a switch-mode converter and a regulator. The first mode converter is operable to dynamically step down a fixed power supply voltage according to amplitude variations in an envelope signal received by the regulator, and use the resulting dynamic power supply signal to power the regulator. The second power supplying apparatus is connected in parallel with the first power supplying apparatus. Depending on a power of an output signal to be generated at an output of the power amplifier, power is supplied to the power amplifier from either or both of the first and second power supplying apparatuses.

The invention discloses a power control circuit. The invention relates to control on power of a power amplifier and in particular relates to control on current of a power amplifier under different power requirements. The common power control circuits are only regulated by power control signals generated by basebands and can not optimize the current due to different power requirements, therefore the fixed bias circuits designed to meet the high power requirement can lead to unnecessary current consumption under low power requirement. The invention provides a method for dynamically regulating the current according to difference of the output power of the power amplifier. In principle, the method relates to a system which comprises a power supply control circuit and a power amplifier, wherein the power supply control circuit comprises an error amplifier, two voltage stabilizers and a current detection circuit; the detection circuit detects the current flowing through the power amplifier and generates a detection signal; the signal can be a voltage or a current; in one embodiment, the current flowing through the power amplifier can be copied and reduced to a scale; the copied current is further modulated by an input power control signal and is fed back to the error amplifier; and then the error amplifier generates an output voltage to control a base on the power amplifier, thus achieving the aims of dynamically controlling the base voltage and further optimizing the current. The power control circuit is mainly used for controlling the power of the radio frequency power amplifiers.

The invention discloses an online fault location method and equipment of a radio frequency transmission line, wherein the online fault location method of the radio frequency transmission line includes that an online test is conducted on the tested radio frequency transmission line at a single end of the radio frequency transmission line, namely, on the premise of not influencing normal working of the line, an interposer is connected with one end of the tested radio frequency transmission line, a high-precision linear frequency modulation signal source which is controlled by a control unit of a fault location main machine produces linear frequency modulation frequency signals, and the frequencies of the linear frequency modulation frequency signals are close to communication working frequencies. A scanning test on the tested radio frequency transmission line is started through the interposer in a method of online. The scanning test is conducted from one end of the tested radio transmission line to the other end of the tested radio transmission line, the one end of the tested radio frequency transmission line is close to the interposer and the other end of the tested radio transmission line is further away from the interposer. Return losses and standing waving values of each position and corresponding positions in the tested radio frequency transmission line, an interface, a wire jumper, a phase adjusting head, a lightning arrester, a direct current separator or all the transmission line of an antenna are tested, and the interface, the wire jumper, the phase adjusting head, the lightning arrester, the direct current separator and the antenna are connected with the tested radio frequency transmission line. And a specific position of a fault in the tested radio frequency transmission line is displayed.

The invention is suitable for the field of radio frequency communication and provides a high-order F type power amplification circuit and a radio frequency power amplifier. The circuit comprises a transistor, a parasitic parameter adjusting unit, a high-order harmonic impedance control unit and a fundamental wave impedance control unit, wherein the parasitic parameter adjusting unit is used for adjusting the influence of transistor parasitic parameters on F type power amplification; the high-order harmonic impedance control unit is connected with the parasitic parameter adjusting unit and used for respectively independently controlling impedance matching for second harmonics to quintuple harmonics of the transistor; the fundamental wave impedance control unit is connected between the high-order harmonic impedance control unit and a capacitor C1 and used for independently controlling impedance matching for fundamental waves of the transistor, and the capacitor C1 is further connected with a load. The accurate control of up to quintuple harmonic impedance of the F type power amplifier is achieved through the high-order harmonic impedance control unit, the energy loss of the transistor is reduced, the power amplification efficiency is improved; each harmonic impedance is independently designed, so that harmonic impedance control circuits do not affect each other, the optimized debugging at a later period is not needed, and the design complexity is reduced.

The invention relates to the field of mobile communication and particularly relates to a method for adjusting a power supply voltage of a radio frequency power amplifier and a radio frequency circuit and is used for solving the problem that in the prior art, the power supply voltage of the radio frequency power amplifier cannot be flexibly adjusted. According to the embodiment of the invention, power output to an antenna by a radio frequency front end is coupled based on a coupling coefficient and then is fed back to a radio frequency transceiver. Transmitting power on a target channel and power on an adjacent channel of the target channel are calculated according to the feedback coupled power. The power supply voltage of the radio frequency power amplifier is adjusted according to a difference value between the transmitting power and the power on the adjacent channel of the target channel. According to the embodiment of the invention, the power supply voltage of the radio frequency power amplifier can be adjusted flexibly in real time according to the difference value between the transmitting power and the power on the adjacent channel of the target channel, so the power consumption when the radio frequency power amplifier works can be effectively reduced, and the standby and endurance duration of a mobile terminal can be prolonged.

The application provides a power supply control method and device of a radio frequency power amplifier, terminal equipment and medium. The method comprises the following steps: acquiring a mapping relation table corresponding to a reference channel of the radio frequency (RF) power amplifier, acquiring an adjacent frequency channel leakage ratio when the RF power amplifier works under the non-reference channel with the reference power supply voltage and the reference RF gain index and transmits the preset power; determining a first voltage compensation value corresponding to the non-referencechannel according to the adjacent frequency channel leakage ratio and the target adjacent frequency channel leakage ratio, and compensating the reference power supply voltage according to a first voltage compensation value to obtain the power supply voltage of the non-reference channel. Therefore, the power supply voltage of the non-reference channel is compensated according to the adjacent frequency channel leakage ratio of the non-reference channel working with the working parameter of the reference channel, thereby guaranteeing that the adjacent frequency channel leakage ratio satisfies therequirement and the power consumption of the RF power amplifier achieves the best when the RF power amplifier works at the non-reference channel.

An amplifier using a wide band, high efficiency, and low distortion amplifier free from clipping distortion, and a high efficiency and low distortion radio frequency power amplifier, using that amplifier, which can be applied to wide band wireless communication systems are provided. The amplifier has a DC—DC converter 2, augmented with a low pass filter 4, for amplifying the low frequency components of an input signal from a terminal 5, and a class B amplifier, augmented with a high pass filter, for amplifying the input signal and supplying its high frequency components after amplification. The DC—DC converter and the class B amplifier are connected in parallel, and the power supply voltage of the class B amplifier is controlled with the low frequency components of the input signal.

The invention is applicable to the field of radio frequency communication, and provides a harmonic power amplifying circuit with high efficiency and a wide bandwidth and a radio frequency power amplifier. The circuit comprises an input matching network, a transistor and an output matching network; a grid electrode of the transistor is connected with an output end of the input matching network, a drain electrode of the transistor is connected with an input end of the output matching network, and a source electrode of the transistor is grounded; the output matching network causes a lower sideband of the harmonic power amplifying circuit to work in a continuous inverse F amplification mode and causes an upper sideband of the harmonic power amplifying circuit to work in a continuous F amplification mode; and the output matching network and a parasitic network of the transistor form a low pass filter. According to the harmonic power amplifying circuit provided by the invention, due to the transition from the continuous inverse F power amplifier working mode to the continuous F power amplifier working mode, the efficiency of a continuous harmonic control power amplifier is effectively improved to be higher than 60%, a relative bandwidth is improved to be higher than 80%, and the harmonic impedance is simple to match and easy to realize.

A method and system of radio frequency (RF) power transmission among multiple wireless stations is provided. Control signals for switching a receiving station between a power reception mode and a data reception mode are generated. The control signals provide switching information about which of the modes to switch to, and timing of the switching. In the data reception mode, the receiving station processes an RF transmission from a sending station as a data communication. In the power reception mode the receiving station processes the RF transmission as energy radiation for powering the receiving station. One type of control signal for power mode switching is generated at the MAC layer of a receiving station and sent to the PHY layer of that station for power mode switching. Another type is RTS / CTS control signal exchanged between the sending and receiving stations.

Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and / or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and / or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.

A resonant power converter for ultra-efficient radio frequency transmission and associated methods. In one exemplary embodiment, the invention is digitally actuated and uses a combination of a noise-shaped encoder, a charging switch, and a high-Q resonator coupled to an output load, typically an antenna or transmission line. Energy is built up in the electric and magnetic fields of the resonator, which, in turn, delivers power to the load with very little wasted energy in the process. No active power amplifier is required. The apparatus can be used in literally any RF signal application (wireless or otherwise), including for example cellular handsets, local- or wide-area network transmitters, or even radio base-stations.

The present invention regards a device intrinsically designed to resonate, suitable for RF power transfer, particularly usable for the production of plasma and electrically connectable downstream of a radio frequency power supply with fixed or variable frequency, comprising at least one inductive element (Lp), which can be powered, during use, by such at least one power supply; at least one capacitive element (Cp) electrically connected at the terminals of such at least one inductive element (Lp); such at least one device having a resonance angular frequency equal to: ωo=1 / √LpCp. The capacitive element (Cp) and the inductive element (Lp) have values such that, at resonance state, they provide an equivalent impedance, measured at the terminals of such device, substantially of resistive type and much greater than the value of the parasitic impedance upstream of such terminals of such device, such that the effect of such parasitic impedance is, during use, substantially negligible.

Disclosed is a power control method for a radio frequency power amplifier, comprising the following steps: S1. reading a power source voltage signal and a power control signal and generating an amplified signal having a linear relationship with the power control signal; S2. according to the amplified signal and saturation information, generating one or more controlled currents, merging each controlled current, and converting the merged total current into voltage; S3. Conducting linear voltage regulation on the converted voltage and generating a base control voltage of the radio frequency power amplifier. The present invention dynamically monitors the saturation information of a pass element to change the base voltage of the radio frequency power amplifier, thus improving additional power efficiency of the radio frequency power amplifier at multiple power level and over a large power source voltage range, and improving the properties of the radio frequency switch thereof.

A power synthesis circuit for a radio frequency (RF) power amplifier comprises a first matching network and a second matching network, which are connected with two-band signal output ports of the RF power amplifier respectively, and signal coupling circuits which are connected with two-band signal receiving ports respectively. The first matching network and the second matching network are connected with an antenna circuit via a duplexer, and are grounded via an inductor and a switch element which is connected in parallel to the inductor respectively. The leakage of signal among different channels is prevented. The transmission quality of the RF signal is improved. The cost of the power amplifier is reduced and the structure of the power amplifier is simplified.

The invention provides a flyback type multi-level output direct current power supply for quick tracking reference. The power supply can be used for occasions where power supply voltage requires to be changed, for example, power supplies of a radio frequency power amplifier and a sound power amplifier can effectively improve power of the power amplifiers and reduce consumption. The direct current power supply increases auxiliary side winding number on the base of a flyback type switch power supply, connects outputs of each auxiliary side in series, and is matched with control of an auxiliary side output switch tube to achieve variation of output levels. Connection and disconnection of the auxiliary side output switch tube are controlled by input reference, so that the output levels can track input reference signals. Two-stage control strategy of the primary side switch tube control and the auxiliary side switch tube control are adopted in control, system response speed is increased, and anti-jamming capability is improved.

A radio frequency power amplifier module that brings sufficient attenuation to a radio frequency signal in a bias supply line connecting a bias control part and a radio frequency power amplifier part without increasing module substrate area is aimed. At least one bonding pad 106 having a capacitance component to a ground and stitch structure inductances 108, 109 composed of a bonding wire 105 provided via the bonding pad are provided in the bias supply line connecting the bias control part and the radio frequency power amplifier part.

The amplitude component and phase component in the modulation signal are respectively input to the high frequency input terminal and the power supply terminal of the high frequency power amplifier, and the original modulated wave is obtained from the output of the high frequency power amplifier. Use the output detector to detect the output of the high-frequency power amplifier, use the selector to select the correction data for the detection voltage closest to the detection voltage from the correction data table measured and stored in various temperature environments in advance, and use the phase amplitude correction The device performs the correction of the amplitude component and the phase component. Therefore, it is possible to perform EER operation without causing spectrum degradation.