26 results about "Rf technology" patented technology

This invention discloses a signal transmission path optimization method for an integrated RF terminal chip, relating to the field of RF technology. The invention includes: S100 real-time parameter acquisition, calculation of mismatch loss factor, impedance deviation factor, and interference rise factor; S200 weighted fusion of the three factors to obtain a disabling coefficient, constructing a disabling coefficient curve, performing curve feature analysis to generate a reconstruction index, and comparing it with a threshold to determine whether reconstruction is necessary; S300 when reconstruction is required, querying the target control word of the matching network and filter based on a multi-dimensional lookup table, and performing priority correction based on interference and power occupancy; S400 executing control word writing, verifying the effect, and if it does not meet the standard, performing local search and fine-tuning until performance is restored. This invention achieves adaptive optimization of signal transmission paths in multiple frequency bands and scenarios through a closed-loop dynamic reconstruction process of perception, decision-making, execution, and verification, effectively reducing mismatch loss and interference impact, and improving the overall performance of the RF terminal chip.

The present disclosure provides a region-restricted electronic cigarette working circuit, which comprises a monitoring chip, a region sensing module and an atomization switch module. The region sensing module interacts with an external reader / writer through built-in wireless radio frequency tags to identify the boundary of a smoking prohibited area in real time and output an induction signal to the monitoring chip. Based on the received induction signal, the monitoring chip sends on-off instructions to the atomization switch module through an atomization signal control terminal, thereby controlling the on-off of the heating element power supply circuit. This circuit realizes the automatic control of the electronic cigarette use area through wireless radio frequency technology, breaks through the time and space limitations of traditional manual supervision, directly blocks illegal smoking behavior at the hardware level, significantly improves the execution efficiency of public place smoking prohibition regulations, effectively reduces management costs and enhances real-time supervision, and provides technical support for building an intelligent smoking management system.

This invention discloses an integrated structure and method for a time-domain pulse source and antenna, belonging to the field of radar and radio frequency technology. It includes a housing containing a circuit board with an integrated pulse generation module and a matching optimization module. An antenna radiation module is also housed within the housing and connected to the radio frequency output terminal on the circuit board via an extremely short radio frequency feed structure. The matching optimization module acquires the excitation waveform from the pulse generation module and the radiation waveform from the antenna radiation module, and adjusts the pulse parameters of the pulse generation module or the structural parameters of the antenna radiation module to achieve integrated matching of the pulse source and antenna. This integrated structure and method for a time-domain pulse source and antenna solves the problem of decreased detection accuracy caused by signal tailing in ultra-wideband time-domain radar systems through joint optimization design of the pulse source and antenna, and is suitable for high-resolution, high-real-time anti-UAV detection and identification systems.

The present invention relates to the technical field of ultra-high frequency radio frequency antennas. Disclosed are a copper wire sewing thread ultra-high frequency antenna material and a method for manufacturing an ultra-high frequency antenna by using a sewing machine. The copper wire sewing thread ultra-high frequency antenna comprises a copper wire sewing thread formed by twisting a bare copper wire and a sewing thread, and the copper wire sewing thread is sewn on a tag fabric substrate, so as to form the copper wire sewing thread ultra-high frequency antenna. The manufacturing method comprises the steps of performing twisting to form a copper wire sewing thread, determining a sewing type, determining a sewing stitch trajectory, a sewing stitch pitch and a sewing length, sewing the copper wire sewing thread onto a tag fabric substrate, etc. The copper wire sewing thread ultra-high frequency antenna of the present invention has good electrical conductivity, a small diameter, high tensile strength and good flexibility; the ultra-high frequency antenna is manufactured by means of a high-speed sewing machine on the basis of a fabric material, thus offering advantages of resistance to washing, resistance to folding and pressing, resistance to ironing, as well as high manufacturing efficiency; and the manufacturing cost thereof is low, facilitating wide application of radio frequency technology in the footware and apparel industry, linen industry and bag industry, thereby improving the level of information-based management.

This invention discloses a terahertz signal generation system and method based on space-based optical radio frequency technology, comprising an optical comb generation module, an optical carrier frequency selection and modulation module, a transmission module, and a photoelectric conversion module arranged sequentially. The optical comb generation module generates an optical frequency comb. The optical carrier frequency selection and modulation module selects at least two optical carriers from the optical frequency comb and modulates the optical carriers with radio frequency signals to obtain multiple optical signals. The invention utilizes space-based optical radio frequency technology to achieve the generation and transmission of ultra-wideband terahertz signals, overcoming the bandwidth limitations of traditional electronic technology and the problem of excessive loss of terahertz signals during long-distance transmission. Optical injection locking technology is used to suppress spurious signals generated during optical domain signal processing. Furthermore, the reconfigurable generation of terahertz signals can be achieved through the joint control of the local oscillator signal and dual lasers, realizing the generation and transmission of high-speed, stable, and low-spurious broadband terahertz communication signals.

The application provides a pulse radiator, relates to the field of microwave radio frequency technology, and comprises a radio frequency multistage amplification link and a measurement and control communication component; the radio frequency multistage amplification link generates an output pulse signal; the measurement and control communication component performs real-time monitoring and regulation on the output pulse signal, and is configured with a self-adaptive degradation fault prevention shutdown control strategy. In a continuous radiation working mode, operating state parameters are continuously acquired; when the operating state parameters reach a preset warning limit, the self-adaptive degradation control is triggered, a dynamic attenuation control code is issued to reduce the output gain to enter a degradation working mode; during the degradation working mode, the parameter development trend is continuously monitored; when the parameters recover to a safe interval, the dynamic attenuation control code is reversely adjusted to smoothly recover the output gain to the initial setting state. The application prevents hard power-off shutdown of the equipment caused by abnormal working conditions, and maintains continuous radiation of the signal.

This invention discloses a radio frequency (RF) control method based on tuning response and harmonic optimization, relating to the field of RF technology. The method includes: Step S1: Generating an array configuration word in the target RF system using a multi-capacitor switching array; Step S2: Generating an initial RF signal by driving a switch state switch using the multi-capacitor switching array; Step S3: Iteratively calculating notch filter parameters using an iterative optimization method; Step S4: Configuring the iteratively generated optimal notch parameters to the notch filter to filter and correct the initial RF signal. Compared with existing technologies, this invention utilizes a multi-capacitor switching array to acquire RF signal spectral data, constructs an iterative optimization process, and combines iterative optimization of notch filter parameters with optimal notch parameter correction, thereby reducing the system's residual harmonic measurement value. It has the advantages of effectively reducing residual spurious power and maintaining high signal-to-noise ratio and low error performance, while reducing systemic interference.

The present invention relates to the technical field of radio frequency, and disclosed is a voltage-controlled oscillator having a wide frequency tuning range, solving the problem in the prior art that oscillators have a narrow and discontinuous output frequency tuning range. The voltage-controlled oscillator comprises a passive topology module, an active negative-resistance module, a frequency tuning module, and a mode switching module; the passive topology module comprises a plurality of mutually coupled inductors; the plurality of inductors are mutually coupled to provide a required impedance peak; the plurality of inductors include one figure-eight inductor coil, a first toroidal inductor coil, and a second toroidal inductor coil; the figure-eight inductor coil comprises a first inductor coil, a second inductor coil, and a common inductor coil; the frequency tuning module is used for tuning a corresponding frequency of the impedance peak; the active negative-resistance module is used for providing a signal gain for the passive topology module so as to satisfy an oscillation condition; and the mode switching module is used for switching an operating mode of the oscillator. The oscillator of the present invention has four continuous operating frequency bands, achieving a wider output frequency tuning range.

This application relates to the field of microwave radio frequency technology, and in particular to a single-balanced mixer and system integrating second harmonic extraction and self-shielding functions. The single-balanced mixer includes: a branch-line coupler, a diode mixer unit, an RF input port, a local oscillator input port, and an intermediate frequency (IF) output port. The branch-line coupler includes two parallel transmission arms and two series transmission arms. The RF input port and the local oscillator input port are respectively connected to the input terminals of the branch-line coupler. The signal input terminal of the diode mixer unit is connected to the output terminal of the branch-line coupler, and the output terminal of the diode mixer unit is connected to the IF output port. A second harmonic extraction port is led out on the transmission line between the output terminal of the branch-line coupler and the signal input terminal of the diode mixer unit. By adopting this application, down-conversion of down-going reception and extraction of up-going second harmonic carrier are simultaneously achieved, solving the self-interference problem between transmission and reception, simplifying the circuit structure, and improving the RF energy utilization rate.

This application provides a radio frequency (RF) front-end module, relating to the field of RF technology. The RF front-end module includes a power amplification module, a signal coupling module, and a detection module. The signal coupling module includes a control unit and a bidirectional coupling circuit, which is connected between the power amplification module and the detection module. The control unit is configured to control the bidirectional coupling circuit to be in a conducting state. The bidirectional coupling circuit is configured to couple the RF signal on the signal transmission line of the power amplification module to the detection module. The detection module is configured to detect a pre-distortion signal based on the coupled signal transmitted by the bidirectional coupling circuit. This application achieves bidirectional coupling by coupling the transmitted and echo signals on the signal transmission line of the power amplification module to the detection module, thereby enabling accurate detection and feedback of the nonlinear characteristics of the power amplification module's core. Based on this, the pre-distortion signal determined is more accurate.

The application is suitable for the field of radio frequency technology, and provides a radio frequency circuit and an electrical equipment. The radio frequency circuit comprises a signal transmitting unit, a signal receiving unit, a circulator, an isolator and an antenna. The output end of the signal transmitting unit is connected with the first end of the circulator, the second end of the circulator is connected with the antenna, the third end of the circulator is connected with the input end of the isolator, and the output end of the isolator is connected with the input end of the signal receiving unit. In the radio frequency circuit of the application, the radio frequency switch is replaced by the circulator and the isolator. Since the circulator and the isolator are both passive devices, and the peripheral circuit of the circulator and the isolator is simple and does not need to be debugged, the radio frequency circuit provided by the application can reduce the cost of the time division duplex radio frequency circuit.

This utility model relates to the field of microwave radio frequency technology and discloses an adapter for connecting a radio frequency connector to a microstrip connector. It includes a radio frequency connector body and a connector head disposed on one side of the radio frequency connector body, the electrical output terminal of which is electrically connected to a mounting plate. A metal platform is disposed on one side of the mounting plate, the inner cavity of which houses the microstrip body. This utility model, by providing a disassembly mechanism, facilitates the disassembly of the metal platform. When the adapter needs cleaning, component replacement, or troubleshooting, the metal platform can be quickly disassembled, thereby simplifying the maintenance process and improving work efficiency. The easy-to-disassemble design reduces the risk of component damage due to improper disassembly, thus lowering maintenance costs. Furthermore, the easily disassembled metal platform facilitates timely repair and replacement when necessary, ensuring the stable operation of the adapter and the entire radio frequency communication system.

A kind of phase detector, phase-locked loop, radio frequency circuit and terminal equipment, it relates to radio frequency technical field, to solve the problem of the deterioration of sweep frequency difference caused by phase detector overflow.Phase detector includes first TDC, second TDC and TDC selection unit, first TDC measures the time difference between reference signal and feedback signal to obtain first phase detection signal, second TDC measures the time difference between reference signal and feedback signal to obtain second phase detection signal, TDC selection unit selects first phase detection signal or second phase detection signal to obtain third phase detection signal, and the third phase detection signal is used to determine the frequency difference information of phase-locked loop.Through TDC selection unit, dynamic switching is made between two TDCs, when one TDC has overflow, the phase detection signal output by the other TDC is selected to generate frequency difference information, and the wrong frequency difference feedback of overflow TDC is discarded, the phase detection operation without overflow is realized, and the problem of the deterioration of sweep frequency difference caused by phase detector overflow is solved.

This application relates to the field of microwave radio frequency technology, and in particular to a single-balanced mixer and system integrating second harmonic extraction and self-shielding functions. The single-balanced mixer includes: a branch-line coupler, a diode mixer unit, an RF input port, a local oscillator input port, and an intermediate frequency (IF) output port. The branch-line coupler includes two parallel transmission arms and two series transmission arms. The RF input port and the local oscillator input port are respectively connected to the input terminals of the branch-line coupler. The signal input terminal of the diode mixer unit is connected to the output terminal of the branch-line coupler, and the output terminal of the diode mixer unit is connected to the IF output port. A second harmonic extraction port is led out on the transmission line between the output terminal of the branch-line coupler and the signal input terminal of the diode mixer unit. By adopting this application, down-conversion of down-going reception and extraction of up-going second harmonic carrier are simultaneously achieved, solving the self-interference problem between transmission and reception, simplifying the circuit structure, and improving the RF energy utilization rate.

This invention discloses a method for stabilizing and correcting radio frequency power amplifiers based on modulator parasitic control, belonging to the field of radio frequency technology. The method includes: Step S1: collecting modulator output voltage, power amplifier power supply current, power amplifier power supply voltage, and gate bias voltage; Step S2: calculating parasitic response parameters using a recursive parameter algorithm and recording abnormal oscillation components; Step S3: calculating stability margin values ​​and identifying abnormal oscillation branches; Step S4: calculating the damping coefficient of the abnormal oscillation branches, constructing a digital compensator to perform a cyclic correction process, completing the cyclic correction process when the stability margin value of the abnormal oscillation branch exceeds a preset margin threshold. This invention, by collecting power amplifier power supply voltage and gate bias voltage, uses a recursive parameter algorithm to calculate parasitic response parameters in real time, and actively predicts and corrects parasitic oscillations. It has the advantage of verifying parasitic oscillations in the bias network and helps to quickly locate design defects in the bias network.

The application discloses a power amplifier power control method and device, relates to the field of radio frequency technology, and comprises the following steps: setting a first electrically tunable attenuator and a second electrically tunable attenuator in a radio frequency signal channel; constructing an overexcitation protection control loop through the first electrically tunable attenuator; comparing a direct current voltage converted from an output signal through a radio frequency detector with a preset threshold voltage; adjusting the attenuation of the first electrically tunable attenuator; maintaining the stability of output power when the input signal exceeds a set power threshold; triggering a latch when the radio frequency signal is overcurrent or abnormal reflection; cutting off the control voltage of the first electrically tunable attenuator to enter a maximum attenuation state; realizing continuous gain adjustment and temperature compensation through the second electrically tunable attenuator; dynamically adjusting the control voltage of the second electrically tunable attenuator according to a temperature gain compensation algorithm through a micro control unit; and maintaining the stability of output power in a wide temperature range. The application considers rapid protection, continuous gain adjustment and accurate temperature compensation, and improves the reliability and stability of a PA in complex working conditions.

The application relates to the technical field of mechanical safety, in particular to a novel RFID (Radio Frequency Identification) switch sensor which comprises a sensing host, a key assembly, an unlocking module, a state display module, a signal detection module and a signal processing unit. The sensing host is provided with a clamping groove, the key assembly is interlocked with the host through a locking mechanism for protection, the unlocking module realizes the opening and closing of a safety door or a fence through a switching block and a limiting device, the state display module reflects the working state through color change of a light-emitting element, and the signal detection module realizes radio frequency signal identification and unlocking through an antenna coil. Two chips are arranged in the signal processing unit, signals are analyzed, and instructions are generated. The application can realize non-contact identity authentication and internal double-channel loop, improve the safety of fence mechanical safety, and is suitable for high-safety scenes.

The application discloses a radio frequency system, a radio frequency device and a contact resistance detection method thereof, and is applied to the technical field of radio frequency, and comprises the following steps: a radio frequency switch is arranged in a radio frequency system and is used for controlling the on-off of a radio frequency signal; a first end of the radio frequency switch is connected with a first end of a first resistance, a second end of the first resistance is connected with a first end of a first resistance, and a first transmission line with a preset length is arranged; a first resistance with a second end grounded; a second end of the radio frequency switch is connected with a first end of a second resistance, a second end of the second resistance is connected with a first end of a second resistance, and a second transmission line with a preset length is arranged; and a second resistance with a second end grounded. According to the scheme, the anti-breakdown capability of the radio frequency switch can be effectively improved, and meanwhile, the precise measurement of the contact resistance of the radio frequency switch can be supported.

The application discloses a suspended strip line triplexer and limiter integrated device, and relates to the microwave and radio frequency technical field.The device comprises a suspended strip line triplexer composed of a metal cavity and a suspended dielectric substrate, is provided with one input port and three output ports corresponding to different frequency bands, and is provided with a step impedance resonator group between each port, is connected through parallel plate capacitance, and is further connected through a high impedance thin line equivalent series inductance.The step impedance resonator is used for generating a transmission zero point outside the frequency band.The device is provided with PIN diode limiters at the three output ports, the metal cavity is composed of upper and lower metal cover plates, metal patches on the suspended strip line are connected with the upper and lower metal cover plates through vias, radio frequency grounding is realized, and a limiter PIN diode grounding position is reserved.The application has the advantages of compact structure, multi-frequency band signal separation, interference suppression, interference signal amplitude limitation, improved system reliability and stability, and function expansion.

This disclosure provides a radio frequency (RF) switch and electronic device, belonging to the field of RF technology, which at least partially solves the problems of large parasitic capacitance and low isolation in existing RF switches. The RF switch of this disclosure includes a substrate, and a semiconductor layer, a first interlayer insulating layer, and a connection electrode layer sequentially stacked on the substrate; the semiconductor layer includes a plurality of alternately arranged N-type semiconductors and a plurality of P-type semiconductors, and an intrinsic semiconductor sandwiched between the N-type and P-type semiconductors; the connection electrode layer includes a first connection electrode and a second connection electrode; the first connection electrode includes a plurality of first branches; the second connection electrode includes a plurality of second branches; the orthographic projections of an N-type semiconductor and a first branch on the substrate at least partially overlap, and the orthographic projections of a P-type semiconductor and a second branch on the substrate at least partially overlap; wherein at least some of the first branches extend in different directions.

This utility model discloses a phased array radar phase shifter data acquisition and testing system, belonging to the field of microwave and radio frequency technology. The system includes a vector network analyzer, a main control subsystem, a temperature monitoring subsystem, and a waveguide array testing subsystem. This utility model employs a layered, staggered method with equal-length straight and curved waveguides to extract microwave signals, resulting in a compact structure and small overall size. It can be used in conjunction with the device under test (DUT) for environmental adaptability testing and temperature and humidity screening testing, overcoming the problems of large size and high cost of matrix switch box testing equipment. The design of the radio frequency coaxial switch group overcomes the problem of generally low power tolerance in electronic switches. The system has a built-in temperature sensor with temperature protection settings; exceeding the protection temperature triggers a temperature alarm and subsequently power-off protection, ensuring system safety. It can be widely applied to various environmental testing scenarios for radar antenna phase shifters, T / R components, power dividers, etc., and general-purpose modules can be replaced according to the actual testing scenario.

The application provides a radio frequency signal source, a radio frequency signal generation system and an aerosol generating device, which are applied to the field of radio frequency technology. The signal source comprises a phase detector, a signal generation module and a frequency divider. The phase detector, the signal generation module and the frequency divider are connected in sequence. The frequency divider is further connected to the phase detector. The phase detector receives a reference signal and a frequency divided signal, and outputs a detection signal representing the phase difference between the reference signal and the frequency divided signal. The signal generation module generates a radio frequency signal based on the detection signal. The frequency divider performs frequency division processing on the radio frequency signal and outputs the frequency divided signal to the phase detector. In this way, the output of the radio frequency signal can be adjusted based on the phase difference between the actual output radio frequency signal and the reference signal, closed-loop control of the radio frequency signal output process is realized, the stability of the actual output radio frequency signal is effectively ensured, the power of the radio frequency signal is amplified through a power amplification module, the heating efficiency of the aerosol substrate can be effectively improved, and the use requirements of users are met.

This invention relates to the field of radio frequency (RF) technology, and particularly to a low-noise amplifier. The low-noise amplifier of this invention includes an amplification circuit and a bypass circuit. The input terminal of the amplification circuit and the first input terminal of the bypass circuit are interconnected and used to receive RF signals. The second input terminal of the bypass circuit is connected to a first control voltage. The output terminal of the amplification circuit and the output terminal of the bypass circuit are connected and used to output RF signals. A power supply and power consumption adjustment unit is used to adjust the power consumption of the amplification circuit according to a second control voltage. A shutdown unit is used to control the conduction or disconnection of the amplification circuit according to a third control voltage. Compared with the prior art, the low-noise amplifier of this invention includes multiple operating modes, and the operating mode of the low-noise amplifier can be controlled by the shutdown unit and the power supply and power consumption adjustment unit, thereby achieving high gain, low noise, and high applicable frequency. It achieves high circuit integration, low cost, and adjustable power consumption and gain, and is applicable to high frequencies.

The application belongs to the field of microwave and radio frequency technology, and specifically discloses a single-feed dual-frequency different circular polarization Fabry-Perot resonant cavity antenna. The antenna comprises a metasurface array layer and a feed structure layer. The feed structure layer is used for exciting and realizing impedance matching of Ku and Ka working frequency bands through a single antenna feed point, and providing electromagnetic energy for the antenna. The metasurface array layer is used for converting the electromagnetic energy provided by the feed structure layer into different circularly polarized radiation waves. The application can improve the performance of a satellite-ground integrated communication antenna and reduce the system complexity.

The application discloses a phase-locked loop, a radio frequency circuit and a terminal device, relates to the radio frequency technical field, and aims to improve the linearity of a frequency modulation signal output by the phase-locked loop. The phase-locked loop comprises a phase detector, an oscillator, a processing unit and a logic unit. The oscillator outputs a frequency modulation signal to the phase detector according to a frequency adjustment signal output by the logic unit. The phase detector determines a phase error between the frequency modulation signal and a reference signal and outputs the phase error to the processing unit and the logic unit. The processing unit determines a boundary frequency and a frequency modulation slope of each frequency modulation band according to the phase error, the frequency adjustment signal and a frequency control signal, and outputs the boundary frequency and the frequency modulation slope to the logic unit. The logic unit performs logical operation on the phase error and the boundary frequency and the frequency modulation slope of each frequency modulation band, obtains the frequency adjustment signal and outputs the frequency adjustment signal to the oscillator. The frequency adjustment signal is calibrated by the processing unit and the logic unit, the accuracy of the frequency adjustment signal is improved, and the linearity of the frequency modulation signal generated based on the frequency adjustment signal is improved.