227 results about "Rf system" patented technology

The invention provides a single / double-module energy-adjustable superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises single or double parallel acceleration modules, and each acceleration module comprises a superconducting cavity and a low-temperature unit; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the radio frequency system is used for feeding microwave power into the superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electron motion trail control system is used for guiding the electron beam to pass through the acceleration module and the plurality of circulating transmission pipelines with the corner radiuses sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

The invention discloses a channel calibration method and device, a storage medium and electronic equipment, and relates to the technical field of communication, and the method comprises the steps: obtaining a to-be-calibrated channel and a target signal sequence for channel calibration; dividing a to-be-calibrated channel into a plurality of channel arrays; determining a first difference condition corresponding to a to-be-calibrated channel contained in each channel array and second difference conditions corresponding to the plurality of channel arrays based on the target signal sequence; and based on the first difference condition and the second difference condition, determining a target difference condition corresponding to the to-be-calibrated channel, the target difference condition being used for calibrating the to-be-calibrated channel. Different signal sequences do not need to be sent one by one, the sending frequency is reduced, and meanwhile storage resources can be saved, that is, only one target signal sequence needs to be stored; in addition, calibration of a large number of to-be-calibrated channels can be completed by using few computing resources, the calibration efficiency can be improved, and it is guaranteed that the performance of the radio frequency system is not affected.

The invention provides a single-module double-cavity parallel superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises a low-temperature unit and a superconducting cavity; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the refrigerating machine is connected with the superconducting cavity through a high-thermal-conductivity cold chain; the radio frequency system is used for feeding microwave power into each superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electronic motion trail control system is used for guiding the electronic beam current to pass through the double parallel superconducting cavities and a plurality of circulating transmission pipelines of which the corner radiuses are sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

Embodiments described herein relate to an apparatus that includes an RF power supply and an RF power splitter. In an embodiment, the RF power splitter includes a plurality of outputs, and a plurality of RF impedance matches are electrically coupled to different ones of the plurality of outputs of the RF power splitter. In an embodiment, a plurality of RF sensors are configured to measure a voltage and / or a current along a plurality of transmission lines that couple each of the plurality of outputs of the RF power splitter to a different one of the plurality of RF impedance matches. In an embodiment, the apparatus further includes a controller communicatively coupled to the plurality of RF sensors and the plurality of RF impedance matches. The controller is configured to balance power that passes through the plurality of RF impedance matches with a detuning operation.

The present disclosure provides an antenna device and a radio frequency system. Wherein, the antenna device comprises an antenna array and a feed network; wherein the feed network comprises a main path and a plurality of branch paths connected with the main path; the antenna array is divided into a plurality of antenna unit groups, each antenna unit group comprises a plurality of antenna units, the antenna unit comprises a radiation structure and a phase shift structure connected with the radiation structure; the phase shift structures of the plurality of antenna units located in the same antenna unit group are connected with the same branch path.

The utility model relates to a kind of compatible double-architecture radio frequency front-end architecture, to improve the flexibility and compatibility of radio frequency system under different working modes;The architecture includes radio frequency front-end module, and radio frequency front-end module contains transmitting and receiving port, radio frequency switch port, low noise amplifier, power amplifier, first radio frequency switch, second radio frequency switch, antenna port and front-end transmitting port;Low noise amplifier is connected with transmitting and receiving port, and signal is amplified under receiving mode;First radio frequency switch is connected low noise amplifier with power amplifier, according to working mode switching signal path, avoid low noise amplifier and power amplifier work simultaneously;Second radio frequency switch connects power amplifier with antenna port, and signal transmission is to antenna;Front-end transmitting port sends signal through power amplifier.

The disclosure related to a RF front-end device, a RF system and an electronic device. The RF front-end device is configured with an antenna terminal, a control terminal for receiving multiple control signals, and multiple input terminals for receiving multiple RF signals. The RF front-end device includes: a first switch unit having multiple first terminals connected to the multiple input terminals respectively; a power amplification unit, having an input terminal connected to a second terminal of the first switch unit, and an output terminal connected to the antenna terminal; and a control unit, where the control unit is connected to each of the control terminal and the power amplification unit, and is configured to control, based on a received target control signal, the power amplification unit to perform power amplification processing on a received target RF signal. The target control signal is one of the multiple control signals, and frequency bands of the multiple RF signals are different. This can increase the multiplexing efficiency of the power amplifier unit, enhance the integration level of RF front-end device, and achieve a low cost.

The present application relates to a kind of multi-agent deep Q network optimization indoor VLC-RF resource energy efficiency allocation method, belong to optical wireless communication technical field.The present application is to improve the system energy efficiency of VLC-RF heterogeneous network, user is abstracted as the agent of deep Q network, user selects the action of VLC-RF access point, power distribution and subcarrier resource allocation is abstracted as the action of agent, the product of the proportional fair satisfaction degree value that considers user to the communication rate alliance satisfaction or to the channel reliability alliance satisfaction and system energy consumption profit value is designed as the reward Q value of deep Q network, using a variable greed factor control agent's alliance conversion, obtains the access AP channel state of user side emphasis;Then, using deep Q network selects the action of maximum Q value for user, optimizes multiple user association access point in VLC-RF system, access point transmission power and subcarrier resource allocation.The proposed method can improve the system energy efficiency of VLC-RF while increasing user satisfaction.

This application provides a device and method for processing spatial environmental noise in electronic devices. The device includes: a communication antenna for receiving communication signals and spatial environmental noise; a detection antenna for real-time detection of the spatial environmental noise; a switching network connecting the signal paths of the communication antenna and the detection antenna respectively, for switching the device's operating mode; a signal processing module connected to the signal path of the detection antenna for amplifying, attenuating, and phase-shifting the detected noise signal; a coupler whose through port is connected to the signal path of the communication antenna, its coupling port is connected to the signal path of the detection antenna, and its output is connected to a radio frequency system; and a control module for adjusting the attenuation and phase shift of the signal processing module according to the noise signal parameters received by the communication antenna and the detection antenna, so that the two noise signals are superimposed in antiphase in the coupler. This application improves the receiving performance of wireless communication devices through active detection and cancellation.

The invention provides a resource scheduling method, the method is applied to an electronic device, available frequency bands for wireless communication of the electronic device comprise a first frequency band and a second frequency band, and the method comprises the following steps: when the first frequency band is adopted for wireless communication, obtaining a first communication parameter, and according to the first communication parameter, obtaining a second communication parameter; the method comprises the steps of determining a first limited type when wireless communication is carried out by adopting a first frequency band, determining an uplink frequency band of a radio frequency system of the electronic equipment and a downlink frequency band of the radio frequency system from the first frequency band and a second frequency band according to the first limited type, and controlling the radio frequency system to schedule radio frequency resources according to the uplink frequency band and the downlink frequency band, so that an uplink of the radio frequency system adopts the uplink frequency band and a downlink of the radio frequency system adopts the downlink frequency band to perform wireless communication. The embodiment of the invention further provides a resource scheduling device, electronic equipment and a computer storage medium.

The present application provides an EVM detection method, a communication apparatus, and a network device, which are applicable to the field of wireless communication. The method includes the steps of: a first unit receiving first information from a network management and transmitting second information to a second unit at an EVM detection period based on the first information, the second information including EVM detection data and time domain information of the EVM detection data, and the time domain information indicating a position of the EVM detection data within a radio frame; and the first unit receiving an EVM detection result from the second unit, the EVM detection result including an EVM value of at least one node in the second unit and the number of sampling nodes of the EVM detection data, and the EVM value of any node in the at least one node is determined based on the EVM detection data collected on the node. According to the above method, the EVM value of a radio frequency system can be obtained at low cost.

The invention relates to a satellite-borne soft definition type radio frequency system and an application method thereof. The system comprises an on-orbit intelligent management module, a reconfigurable baseband processing module, a digital receiving module and a digital transmitting module, wherein the on-orbit intelligent management module is used for switching a current working mode of a satellite as required, determining a corresponding working frequency band and determining management and control parameters of other modules according to the working frequency band; the reconfigurable baseband processing module is used for calling an IP core in a software pool to form current complete baseband processing software based on a current system working state, processing received data, processing data to be transmitted, and transmitting the processed data to the digital transmitting module; the digital receiving module is used for performing pre-selection, amplification, filtering and frequency conversion processing on the received radio frequency signal; and the digital transmitting module is used for performing frequency conversion, amplification and filtering processing on the to-be-transmitted data and then outputting the processed data. Therefore, the radio frequency transmission requirements of various satellites and systems can be met.

Systems and methods for facilitating interactions between a medical device (e.g., an imaging device, a surgical tool, a robotic arm, etc.) and a patient using radio frequency (RF) co-localization are provided. The systems include a radio-frequency (RF) interrogator system, one or more first RF target devices for coupling to a patient support for supporting a patient with respect to whom a medical device is to perform a task, and one or more second RF target devices for coupling to the medical device. A controller determines a position of the patient support within an RF interrogator system reference frame, a first position of the medical device within the RF interrogator system reference frame, a transformation between the RF interrogator system reference frame and a patient support reference frame, and a second position of the medical device within the patient support reference frame.

This application provides a radio frequency (RF) system, a terminal device, and a communication method thereof, relating to the field of communication technology. The RF system includes an RF signal generation circuit, a control node, a first tuning circuit, and a second tuning circuit. The first tuning circuit includes a first input terminal, a first output terminal, and a first control terminal, with the first output terminal used for coupling with a first radiator. The second tuning circuit includes a second input terminal, a second output terminal, and a second control terminal, with the second output terminal used for coupling with a second radiator. The control node is coupled to both the first and second control terminals. The RF signal generation circuit is coupled to the first input terminal, the second input terminal, and the control node. The RF signal generation circuit transmits RF signals to the first and second input terminals, and the control node controls the second tuning circuit to assist the first tuning circuit, or the first tuning circuit to assist the second tuning circuit, to improve the communication performance of the assisted communication standard.

The application relates to a mobile phone direct connection S-band phased array radio frequency system based on a multi-layer mixed pressing plate technology, and belongs to the technical field of low-orbit satellite wireless communication, and specifically relates to a mobile phone direct connection S-band phased array radio frequency system based on a multi-layer mixed pressing plate technology. The phased array radio frequency system contains a plurality of single-channel radio frequency components, each single-channel radio frequency component is internally integrated with a radio frequency SIP module, a power supply SIP module, a radio frequency PA and a transceiving filter; the complete radio frequency transceiving link and the calibration branch are highly integrated in the single-channel TR component with the size of 60*50*8mm, the overall structure and the peripheral interconnection design of the component are greatly simplified, the single-channel radio frequency component multiplexing and the small-size and light-weight design of the component are realized, and the S-band low-orbit satellite engineering application is adapted.

The invention discloses a radio frequency system. According to the technical scheme of the embodiment of the invention, the power supply voltage is provided for the power amplification module through the voltage regulator, and the power supply voltage has the same variation trend as the amplitude of the amplified voltage signal generated by the power amplification module, so that the efficiency of the radio frequency system is improved.

The invention relates to a radio frequency device, a radio frequency system and communication equipment, and the radio frequency device is configured with an input port used for being connected with a radio frequency transceiver and an antenna port used for being connected with an antenna. Wherein the radio frequency device further comprises a power amplification unit, the input end of the power amplification unit is connected with the input port, and the power amplification unit is used for supporting power amplification of the received radio frequency signal; the isolation unit is respectively connected with the output end of the power amplification unit and the antenna ports, is used for allowing the radio frequency signal to be transmitted along a preset link in a one-way mode, has a one-way conduction function, and allows the radio frequency signal to be transmitted in the link direction between the antenna ports pointed by the power amplification unit; the output load of the power amplification unit is not influenced by a rear-end circuit, and the output load of the power amplification unit is kept unchanged. Under the condition, the power amplification unit can output power normally and stably, safe operation of the power amplification unit can be ensured, and the service life of the power amplification unit is prolonged.

The present application relates to a radio frequency system and a communication device. The radio frequency system may include: a transceiver circuit; a receiving circuit; a first coupling circuit, configured to support coupling of a transmit signal on a transceiver path and coupling of a reflected signal of the transmit signal, and output a first forward coupled signal and a first backward coupled signal; a second coupling circuit, configured to selectively turn on the receiving path and the coupling path, support coupling of the first forward coupled signal and coupling of the reflected signal, and output a second forward coupled signal and a second backward coupled signal; and, a processing circuit, configured to determine second impedance information of the receiving path according to the second forward coupled signal and the second backward coupled signal.

Disclosed in the present application is a radio frequency system, comprising: a radio frequency transceiver (10) configured with a first transmitting port and a second transmitting port; and a transmitting module (20), comprising a first transmitting circuit (210), a second transmitting circuit (220) and a first switching circuit (230), wherein an input end of the first transmitting circuit (210) is connected to the first transmitting port, an input end of the second transmitting circuit (220) is connected to the second transmitting port, an output end of the first transmitting circuit (210) and an output end of the second transmitting circuit (220) are switchably connected to a first antenna or a second antenna by means of the first switching circuit (230); and the second transmitting circuit (220) comprises a power amplification unit (221) for supporting power amplification processing of a radio frequency signal. When the radio frequency system operates in a single-connection mode, a target transmitting circuit is determined on the basis of a power mode of the radio frequency system, and a target transmitting port is controlled to output the radio frequency signal to the target transmitting circuit for radiation by means of a target antenna. The target transmitting circuit is the first transmitting circuit (210) or the second transmitting circuit (220), the target transmitting port is the first transmitting port or the second transmitting port in the same group of transmitting ports, and the target antenna is determined on the basis of the antenna efficiencies of the first antenna and the second antenna.

The invention discloses a radio frequency control method based on tuning response and harmonic optimization, and relates to the technical field of radio frequency, and the method comprises the steps: S1, generating an array configuration word in a target radio frequency system through employing a multi-capacitor switching array; s2, a multi-capacitor switching array is used for driving switch state switching to generate an initial radio frequency signal; s3, constructing an iterative optimization method to carry out iterative calculation on parameters of the notch filter; and S4, configuring the optimal notch parameter generated by iteration to the notch filter, and carrying out filtering correction on the initial radio frequency signal. Compared with the prior art, the method has the advantages that the frequency spectrum data of the radio frequency signal is acquired by means of the multi-capacitor switching array, and the harmonic residual measurement value of the system is reduced by constructing the iterative optimization process and combining the notch filter parameter iterative optimization and using the optimal notch parameter correction; the method has the advantages of effectively reducing residual stray power, maintaining high signal-to-noise ratio and low error performance, and reducing systematic interference.

A radio frequency system and an electronic device. The radio frequency system includes a radio frequency transceiver module, a radio frequency front-end module, at least one antenna radiator, and at least one first low-noise amplification module. The radio frequency front-end module includes at least one transmission path and at least one reception path. An end of the transmission path is electrically connected to the radio frequency transceiver module, and an end of the reception path is electrically connected to the radio frequency transceiver module. The first low-noise amplification module is connected between the antenna radiator and the reception path. When the first low-noise amplification module is in a first working state, the first low-noise amplification module is conductive between the antenna radiator and the reception path, and when the first low-noise amplification module is in a first bypass state, it is short-circuited between the antenna radiator and the reception path.

Radiofrequency systems for use in advanced driver assistance systems (ADAS) can include a mixture of high frequency (e.g., above 1 GHz) analog and components and lower-frequency digital devices mounted on one main circuit board. Cost savings can be achieved by providing high-frequency signal paths on an interposer circuit board that is mounted to the main circuit board and couples devices requiring high-frequency signalling (e.g., distributing a local oscillator signal to several devices forming part of a cascaded radar system). The interposer is fabricated from special purpose materials suitable for routing high frequency signals with low loss, while the main circuit board can be fabricated from commodity materials suitable for lower frequency applications.

Due to the line-of-sight nature of optical wireless communication and the limited field of view of optical receivers, the coverage of an access point (120) and the overlapping coverage area of neighboring access points (120) in an optical system are smaller compared to RF systems. Supporting secure roaming of an endpoint (110) in an optical multi-cell wireless communication network (100) becomes more challenging. To address this problem, a subsystem is disclosed that selects a candidate access point for an endpoint (110) from a plurality of access points (120) based on one or more neighbor relations and informs the endpoint (110) about the candidate access point to trigger the endpoint (110) to start a process to pre-establish a new pairwise transient key between the endpoint (110) and the candidate access point (120) for a secure handover.

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 invention relates to the technical field of radio frequency filters, and discloses an electromagnetic hybrid coupling filter. The filter is formed by stacking at least two spiral wiring resonators perpendicular to a winding plane, and comprises two input and output ports which are respectively connected with the first resonator and the last resonator. Each spiral wiring resonator is composed of at least two layers of metal spiral wiring, and the multiple layers of metal spiral wiring are sequentially connected through plated-through holes. The spiral wiring resonator is arranged in the insulating medium, and the resonant frequency of the spiral wiring resonator is determined by the length of the metal wiring and the dielectric constant of the dielectric material. Electric coupling and magnetic coupling exist between every two adjacent spiral wiring resonators at the same time, a transmission zero point can be generated outside a passband while a coupling signal forms the transmission passband, and the out-of-band rejection capacity is improved. The spiral wiring filter is compact and flexible in structure, can be realized by adopting various metal wiring processes, and can be independently made into a filter chip or directly wound in a circuit substrate of a radio frequency system to realize a filtering function.

A radiofrequency (RF) system may comprise a duplexer or multiplexer, e.g., when the transmitted signal frequency is different from the receiving frequency in a RF communication system, a duplexer may combine the transmitter and the receiver into the same antenna. In other possible RF communication systems, where the transmit (Tx) and receive (Rx) paths utilize the same frequencies (which are duplexed in time domain), a multiplexer may be used to connect different transmitters, receivers and / or transceivers that are using different frequencies, into one common / antenna port. A multiplexer may be used to share an antenna between multiple transceivers at different frequencies. In some embodiments, the multiplexer may be tunable to different frequencies during operation.

The utility model discloses a low-noise amplifier circuit, a low-noise amplifier and a radio frequency system, and the low-noise amplifier circuit comprises a plurality of gain subunits which are connected in parallel; the output end of the control circuit is connected with the controlled ends of the plurality of gain subunits, and the control circuit is used for outputting enable signals to the plurality of gain subunits and controlling the plurality of gain subunits to work; and the input impedance compensation circuit is connected with the plurality of gain subunits in parallel, and the input impedance compensation circuit is used for compensating the input impedance of the plurality of gain subunits. According to the utility model, the problem that when the equivalent transconductance is changed to adjust the gain, the input impedance is influenced and the requirement of input impedance matching cannot be met at any time is solved.

This application provides a radio frequency (RF) system and electronic equipment. The RF system includes an RF transceiver module, an RF front-end module, at least one antenna radiator, and at least one first low-noise amplifier module. The RF front-end module includes at least one transmit path and at least one receive path. One end of the transmit path is electrically connected to the RF transceiver module, and one end of the receive path is electrically connected to the RF transceiver module. The first low-noise amplifier module is connected between the antenna radiator and the receive path. When the first low-noise amplifier module is in a first operating state, it is conductive between the antenna radiator and the receive path. When the first low-noise amplifier module is in a first bypass state, it is short-circuited between the antenna radiator and the receive path. In the first operating state, by placing the first low-noise amplifier module close to the antenna radiator, the noise figure is reduced, and the signal sensitivity of the receive path is improved.