130 results about "Antenna matching" patented technology

A matching circuit, a radio frequency front-end circuit, a radio transceiver apparatus, and an electronic device are provided. The radio frequency front-end circuit includes a low noise amplifier and a power amplifier each coupled to an antenna through a matching circuit. The matching circuit includes a transformer, a capacitor, a first switch, and a first inductor element. The transformer is coupled to the power amplifier and the antenna. The capacitor is coupled to the transformer and to the low noise amplifier. The first switch is coupled to the capacitor and to the transformer and is grounded. The first inductor element is coupled to the capacitor and to the first switch and is grounded. A resonant network formed by the first inductor element and the first switch enables the radio frequency front-end circuit to in a wide frequency band.

The invention provides a dual-carrier interphone. The dual-carrier interphone comprises a receiver link and a transmitter link, the receiver link consists of an antenna matching network, a first electric tuning filter, a low noise amplifier, a second electric tuning filter, a frequency mixer, an intermediate frequency amplifier, an intermediate frequency demodulation chip and a baseband chip which are connected in sequence; a transmitter link adopts single-carrier transmission or dual-carrier transmission, and the single-carrier transmission is realized through a baseband chip, a TCVCXO crystal oscillator, a phase-locked loop chip, a transmission VCO, a pre-amplifier, an attenuator, a pre-amplifier, a driving-stage amplifier, an excitation-stage amplifier and an antenna matching network which are connected in sequence; on the basis, the dual-carrier transmission switches the output of the receiving VCO to a channel of the pre-amplifier, and controls the transmitting VCO and the receiving VCO to transmit simultaneously. According to the invention, one-channel transmission or two-channel transmission is realized by adopting one transmission link, simultaneous two-channel simultaneous talkback can be realized, and the call efficiency is improved.

The invention provides a same and different frequency digital transfer station, which comprises a receiving link and a transmitting link, the receiving link comprises an antenna matching network, a first electric tuning filter, a low noise amplifier, a second electric tuning filter, a frequency mixer, an intermediate frequency amplifier, an intermediate frequency demodulation chip and a baseband chip which are connected in sequence; the transmitting link comprises a baseband chip, a control chip, a crystal oscillator, a phase-locked loop for transmitting, a transmitting VCO, a pre-amplifier, an attenuator, a pre-stage amplifier, a driving-stage amplifier, an exciting-stage amplifier and an antenna matching network which are connected in sequence; the crystal oscillator is further connected with the receiving phase-locked loop, the receiving phase-locked loop is connected with the receiving VCO, and the receiving VCO is connected with the frequency mixer. According to the invention, independent oscillation and phase-locked loops are adopted for receiving and transmitting, and the receiving VCO and the transmitting VCO lock corresponding working frequencies all the time when being started, so that the technical requirements of same-frequency transfer and different-frequency transfer are met.

The utility model provides an antenna matching circuit and a radio frequency circuit, and relates to the technical field of radio frequency circuits. In the antenna matching circuit, the output end of a signal generation circuit is connected with the input end of a link module, an antenna is respectively connected with the output end of the link module and a coupling circuit, and a control circuit is respectively connected with the coupling circuit and the signal generation circuit; after receiving the test instruction of the control circuit, the signal generation circuit sends a test signal to a transmitting link connected with the coupling circuit; the coupling circuit sends a reflection signal corresponding to the test signal to the control circuit; the control circuit is used for triggering and outputting a link opening instruction for instructing the link module to open a transmitting link to the link module after receiving the reflected signal; and the link module is used for opening a transmitting link corresponding to the link opening instruction. According to the embodiment of the invention, the bandwidth of the radio frequency circuit is effectively expanded, the radio frequency circuit can adapt to different antennas conveniently, and the compatibility of the radio frequency circuit is enhanced.

The invention provides a high-stability low-frequency antenna matching method, and belongs to the technical field of antenna matching, and the method comprises the steps: obtaining initial parameters of a low-frequency antenna, and constructing an initial performance data file of the antenna; environmental factors are analyzed based on historical data, and quantitative analysis is carried out on environmental data, collected based on environmental monitoring equipment, of the position where the low-frequency antenna is located; performing antenna modeling on the initial performance data file by using electromagnetic simulation software, and simulating the performance of the antenna in different matching states to obtain a plurality of matching schemes; the antenna performance is monitored in real time based on a preset test instrument, and each matching scheme is evaluated; and determining an optimal scheme based on an evaluation result and a quantitative analysis result, and adjusting the low-frequency antenna. The matching accuracy and stability are improved, and a better guarantee is provided for stable operation of the low-frequency antenna in a complex environment.

The invention relates to a directional coupler, coupling high power and low power is used to replace existing two high-power directional couplers, thus reducing the cost and reducing the insertion loss of high-power radio frequency channels. The directional coupler cooperates with a control conditioning board, a splitter, a multi-path radio frequency power amplifier and a combiner to form the radio frequency power amplifier system, and the system is connected to a spectrometer; on one hand, by using a standard signal output by the spectrometer and a feedback signal of the directional coupler, nonlinearity caused by the power amplifier is corrected to achieve magnet-free linear radio frequency power amplification and anomaly protection; and on the other hand, the spectrometer can be used for monitoring the output power of the directional coupler and monitoring antenna matching, so as to provide dual protection for the radio frequency power amplifier system.

The invention relates to an antenna matching optimization method and system. The antenna matching optimization method comprises the following steps: dividing a to-be-covered area into a plurality of sub-areas; an antenna is arranged in each sub-region; each antenna is connected with a main signal source through a power divider; and adjusting the direction of the antenna in each sub-region based on the building structure feature, the environment feature and the people flow distribution density of each sub-region. According to the antenna matching optimization method and system, the power of the main signal source is reasonably distributed to the antennas through the power divider, the directions of the antennas in the sub-regions are adjusted according to the building structure features, the environment features and the people flow distribution density of the sub-regions, the method and system can adapt to complex indoor and outdoor environments, and the antenna matching optimization efficiency is improved. According to the method, signal blind areas or signal weak coverage areas are avoided, the problem of insufficient signal coverage is solved, the signal coverage effect is improved, the communication quality and the user experience are improved, and the method has wide application prospects and important practical value.

The present application relates to an ultra-high frequency flexible anti-metal interference electronic tag, which belongs to the field of electronic tag technology, and includes a flexible substrate, a main antenna, a matching circuit, an RFID chip, a parasitic antenna, a variable capacitance diode, a coupling strength detection circuit, and a capacitance control circuit. The main antenna is arranged on a flexible substrate; the matching circuit is connected between the main antenna and the RFID chip; the two parasitic antennas are respectively located on both sides of the main antenna, and the closed ends of the parasitic antennas are connected through variable capacitance diodes; the coupling strength detection circuit is used to detect the coupling strength between the main antenna and the parasitic antenna, and output a control signal; the capacitance control circuit adjusts the capacitance of the variable capacitance diode according to the control signal. The present application improves the anti-interference performance of the electronic tag in a metal environment.

The disclosed system may include an antenna and an antenna matching network. The antenna matching network may include an aperture tuner configured to shift a frequency response of the antenna and an impedance tuner configured to dynamically change an amount of radiated power for the antenna. The antenna matching network may be positioned at least a specified minimum distance from the antenna according to various operating characteristics of the antenna. Various other apparatuses, wearable electronic devices, and methods of manufacturing are also disclosed.

Embodiments of the present application provide a radio frequency compensation control method, a communication device and a storage medium, by determining the current connection state of the main radio frequency circuit and the antenna matching circuit in the radio frequency circuit of the communication device, and then performing at least one of power compensation and matching compensation on the communication device according to the connection state, the effect of providing different power compensation and / or matching compensation for the communication device under different connection states of the radio frequency circuit is realized, so that the communication device can have different radio frequency transceiving performance under different connection states of the radio frequency circuit, which can better meet the needs of the current working state of the communication device, and is beneficial to improve the accuracy of the test result of the communication device and the user experience of the communication device.

The invention relates to the technical field of microwaves, in particular to a broadband antenna matching system based on a 4: 1 impedance conversion balun, which comprises the 4: 1 impedance conversion balun, an adjustable impedance matching network, a radio frequency monitoring unit and a logic control unit, the logic control unit is configured to receive forward power and reflection power signals and calculate to obtain a standing-wave ratio or a reflection coefficient under a current working frequency point; comparing the standing-wave ratio or the reflection coefficient with a preset threshold value; based on a comparison result, executing an adaptive matching algorithm, and iteratively generating and outputting a new digital control signal to drive a variable reactance element in the adjustable impedance matching network to change the value of the variable reactance element; and through closed-loop feedback control, the impedance of the adjustable impedance matching network is dynamically optimized. By modifying an algorithm parameter or a lookup table in the logic control unit, the same hardware platform can easily adapt to antennas with different impedance characteristics and different frequency bands. And the design flexibility and the product universality are greatly enhanced.

A plasma processing device includes an inductively coupled plasma antenna including an input end and an output end, a series circuit including an additional inductor and a variable capacitor connected in series, and a controller that varies a capacitance of the variable capacitor. The input terminal is connected via an antenna matching device to an antenna power supply. The output terminal is connected to the additional inductor. The additional inductor is connected via the variable capacitor to ground.

The invention relates to runtime antenna matching for near field communication wireless power transfer. Systems and methods for runtime antenna matching of wireless power devices are presented. The integrated circuit may include a controller. The integrated circuit may also include circuitry configured to sense a voltage in the switching converter. The circuit may be further configured to determine the presence or absence of a negative voltage spike in the sensed voltage. The controller may be configured to tune a capacitance of the antenna interface circuit between the switching converter and the antenna to perform impedance matching based on the presence or absence of a negative voltage spike in the sensed voltage.

The present application provides a matching circuit for an NFC antenna, including a first filtering circuit and a first coupling circuit. The first end of the first inductor in the first filtering circuit is connected to the first signal transmitting end of the NFC chip, and the second end of the first inductor is connected to the first end of the first capacitor. The second end of the first capacitor in the first filtering circuit is connected to the first end of the first coupling circuit, the second end of the first coupling circuit is connected to the first end of the antenna network, and the third end of the first coupling circuit is connected to the ground terminal and the second end of the antenna network. The first inductor and the first capacitor constitute a first filtering circuit with a bandpass circuit characteristic, and the high-frequency signal and the low-frequency signal can be effectively isolated from being emitted outward through the first inductor and the first capacitor, respectively, and the high-frequency and low-frequency interferences can be filtered out. In addition, the first capacitor and the first coupling circuit can form a capacitor T-type impedance matching effect, so that energy can be better transferred from the transmitting end of the NFC chip to the antenna network.

The utility model relates to a household appliance capable of switching a communication distance. The household appliance capable of switching the communication distance comprises an appliance body and a wireless communication module arranged on the appliance body, the wireless communication module comprises a radio frequency chip, an antenna matching circuit unit and an antenna, the antenna matching circuit unit is connected with the radio frequency chip and the antenna, the radio frequency chip is provided with a power module, and the power module is connected with the antenna matching circuit unit. The antenna matching circuit unit comprises a switching module, a first antenna matching circuit and a second antenna matching circuit, the switching module is used for switching the antenna matching circuit connected with the radio frequency chip, and the communication distance of a communication signal modulated by the first antenna matching circuit is larger than that of a communication signal modulated by the second antenna matching circuit. According to the scheme provided by the invention, the wireless communication module of the household appliance can realize flexible switching between short-distance communication capability and long-distance communication capability only through one antenna matching circuit unit, so that the production cost is reduced, and the circuit universality is improved.

1. The name of the design product: frequency doubling module (BP-40). 2. The use of the design product: for antenna matching debugging, RF component testing and research and development. 3. The design points of the design product: in the shape and structure of the product. 4. The picture or photo that best indicates the design points: perspective view 1.

The present application provides a plasma processing device capable of controlling the position of a resonance point and bringing the resonance point close to the output end of a coil antenna. The device comprises an ICP antenna (21) having an input end (21I) and an output end (21O); a series circuit formed by connecting an additional inductor (24) and a variable capacitor (25) in series; and a control device (33) for changing the capacitance of the variable capacitor (25). The input end (21I) is connected to an antenna power source (23) via an antenna matching device (22), the output end (21O) is connected to the additional inductor (24), and the additional inductor (24) is connected to a ground end via the variable capacitor (25).

The utility model relates to the field of metal detection, and discloses a novel metal detection antenna, which comprises a shell, a reserved cavity a is formed in the center of the surface of the shell, reserved cavities b are formed in the surfaces of the two sides of the shell, receiving antennas are arranged on the two sides of the inner wall of the shell, a plurality of groups of transmitting antennas are arranged on the inner cambered surface of the inner wall of the shell, and the receiving antennas and the transmitting antennas are arranged on the inner cambered surface of the inner wall of the shell. The surface of the upper end of the inner wall of the shell is provided with a transmitting coil connecting wire, the surface of the upper end of the inner wall of the shell is fixedly connected with an antenna matching circuit and a comparator, the surface of the upper end of the inner wall of the shell is provided with a plurality of groups of power strips, and the surface of the receiving antenna is wound with a plurality of groups of receiving coil shielding wires. According to the utility model, the shielding device is added in the antenna structure, the electromagnetic induction directions of different arms of the receiving antenna are opposite, the receiving antenna is combined with the operational amplifier comparator for shielding, and meanwhile, the receiving coil shielding wire is added outside the receiving antenna, so that an effective electromagnetic shielding layer is formed.

The application discloses an end-fire antenna, comprising an antenna board, at least two sub-antennas are arranged at the top end of the antenna board, a feed network layer is arranged at the bottom end of the antenna board, at least two feed columns are arranged in the antenna board, the feed columns correspond to the sub-antennas one by one, the feed columns penetrate through the antenna board and connect the sub-antennas and the feed network layer. The feed network layer transmits high-frequency current to the corresponding sub-antennas through the feed columns, matches the required amplitude and phase for the sub-antennas, and finally converts the high-frequency current into electromagnetic waves, forms strong directional end-radiation in space, and makes the end-fire antenna have good end-fire characteristics.

The invention provides a waveguide antenna. The waveguide antenna comprises a radiant panel provided with two antenna beam adjusting units, a plurality of antenna units, a substrate integrated waveguide structure and an antenna matching section, the two antenna beam adjusting units are symmetrically arranged about the symmetry axis, and the multiple antenna units are arranged between the two antenna beam adjusting units in a staggered mode; a first distance which is 1 / 4 waveguide wavelength of a central frequency point is formed between a first center line of the antenna beam adjusting unit and the symmetry axis; a second interval which is 1 / 4 waveguide wavelength of the central frequency point is formed between the second center lines of two adjacent antenna units; the substrate integrated waveguide structure is provided with a pair of first metal column groups, and a third distance is formed between third center lines of the pair of first metal column groups; different fourth distances are formed between the fourth center lines of the plurality of antenna units and the symmetry axis, and the fourth distances are within the range of 10%-20% of the third distances; the antenna matching section is a three-section matching section, and the physical width of the antenna matching section is one fourth of the waveguide wavelength of a center frequency point.

A method improves antenna matching for a wireless node, preferably of a sensor wireless node and / or actuator wireless node. A radio signal, or at least a portion thereof, is coupled out of the antenna and / or out of the transmit path of the wireless node. The impedance and / or the resonant frequency of the antenna is determined therefrom in the wireless node, and the impedance and / or the resonant frequency of the antenna is adjusted according to the determined impedance and / or resonant frequency by a circuit acting on the antenna.

The utility model relates to the technical field of antenna structures, and provides a broadband multi-branch dual-frequency antenna and radio frequency equipment, and the broadband multi-branch dual-frequency antenna comprises a dielectric substrate; the antenna main body unit is arranged on the dielectric substrate, and the antenna main body unit comprises a low-frequency branch knot and a high-frequency branch knot which are connected with each other; the grounding unit is connected with the antenna main body unit, and a gap structure is arranged between the grounding unit and the antenna main body unit; the first parasitic branch knot is connected with the grounding unit and is adjacent to the antenna main body unit, the bandwidth of the broadband multi-branch-knot dual-frequency antenna is expanded, and the matching characteristic of the antenna is improved.

The invention discloses an antenna matching method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the configuration data of a main control cell, and determining at least one controlled frequency band according to the configuration data; screening candidate cells in a first preset position range from the controlled cells corresponding to the at least one controlled frequency band by taking the master control cell as a center; dividing the candidate cells according to sites to obtain site division results, and determining the site closest to the master control cell in the site division results as a target site; determining a target cell sharing an antenna with the target station from the candidate cells based on the signal quality data of the adjacent cells; wherein the adjacent cells are all cells in a second preset position range of the main control cell; according to the invention, accurate matching of the master control cell and the target controlled cell in a multi-frequency antenna scene is realized, an antenna does not need to be newly added or replaced, hardware input cost in a matching process is reduced, and matching effectiveness is guaranteed through step-by-step screening and signal quality verification.

An eyeglasses device includes a frame, a first temple, a circuit board, and a flexible circuit board. The frame includes first and second metal parts and an insulating component connecting the first and second metal parts. Second metal part is insulated from first metal part by insulating component. At least part of appearance of the frame is formed by the first metal part and the second metal part together. The first temple is pivotally connected to the frame. The circuit board is disposed in the first temple. The flexible circuit board is disposed on the frame and the first temple and is electrically connected to the second metal part and the circuit board. The flexible circuit board includes an antenna matching circuit. The second metal part serves as an antenna, and the antenna with the antenna matching circuit is excited at a first frequency band and a second frequency band.

The invention discloses an antenna matching device (20) comprising an antenna matching circuit (26), a load (24) and a contact (34) for connecting an antenna (30). The antenna matching circuit (26) is used to match a transmission signal (28) to an antenna (30), wherein the antenna matching circuit (26) outputs a matched transmission signal (32). The load (24) attenuates the matched transmission signal (32) such that an attenuated transmission signal (35) is provided at the contact (34), wherein the load (24) is inductively coupled in between the antenna matching circuit (26) and the contact (34) for connecting the antenna (30).

Systems and methods for time-of-flight antenna matching for wireless power devices are described. The integrated circuit may include a controller. The integrated circuit may further include circuitry configured to sense a voltage in a switching converter. The circuitry may be further configured to determine whether a negative voltage excursion is present or absent in the sensed voltage. The controller may be configured to tune a capacitance of an antenna interface circuit between the switching converter and an antenna to perform impedance matching based on the presence or absence of the negative voltage excursion in the sensed voltage.

This disclosure provides an intelligent system and its antenna gain enhancement device. The antenna gain enhancement device includes several metal components and an insulating housing. Each metal component comprises an insulating main body and a metal layer and an insulating layer sequentially arranged from the inside out on the outer surface of the main body. Several independent metal components are arranged within the housing in a predetermined manner. The antenna gain enhancement device is matched with the antenna in the intelligent system. The metal components are used to generate polarization under the influence of an applied electromagnetic field to improve antenna gain. In this disclosure, by designing the antenna gain enhancement device to include several metal components and an insulating housing, these metal components do not require assembly and are directly installed into the housing in an ordered or disordered manner. This achieves polarization under the influence of an applied electromagnetic field, forming an enhanced electric field in the direction of electromagnetic wave propagation, thereby enhancing antenna gain and enabling wider communication range, smoother network speeds, and lower signal latency.

The invention relates to a communication device (10) for a vehicle (2), comprising: a single communication antenna (11); a matching circuit (12) configured to match an impedance of the communication antenna (11); a high-frequency processing module (13) connected to the matching circuit (12) and configured to process a high-frequency signal received by the antenna (11); and a passive selection circuit (15) connected to the matching circuit (12) and configured to communicate with a near field communication module (14) receiving a signal via the antenna (11) so as to operate in an open state when the strength of the signal received by the antenna (11) is below a predetermined strength threshold and to operate in a closed state when the strength of said signal is above the predetermined strength threshold. A signal received by the antenna (11) is transmitted to the near field communication module (14) via the matching circuit (12).

The present application relates to a matching-free TWS spring pin LOGO antenna, which includes an antenna component, a matching component and a control circuit board arranged in the earphone, the antenna component includes a spring pin and an antenna body, one end of the spring pin is electrically connected to the control circuit board, the antenna body is connected to the end of the spring pin away from the control circuit board, the antenna component is arranged on the inner wall of the earphone, the antenna component is electrically connected to the control circuit board through the spring pin, the matching component is arranged inside the spring pin, the matching component is used to improve the transmission efficiency of the antenna component, a wireless communication chip is arranged on the control circuit board, and the spring pin is electrically connected to the wireless communication chip. The present application has the effect of improving the antenna performance of the TWS earphone and optimizing the use of the internal space of the TWS earphone.

The present application relates to a kind of pulse wireless ultra-wideband transmitter chip, including sequentially connected narrow pulse generator, voltage-controlled ring oscillator, output driver, power amplifier and off-chip matching network, wherein the narrow pulse generator is used to generate narrow pulse according to receiving signal;The voltage-controlled ring oscillator is switch operating mode oscillator, for providing frequency calibration when activated, output narrow pulse oscillation signal;The output driver is used to realize the isolation between the voltage-controlled ring oscillator and power amplifier, and sharpens narrow pulse oscillation signal;The power amplifier is used to amplify narrow pulse oscillation signal;The off-chip matching network is used to match the output signal of power amplifier with antenna.Compared with prior art, the present application has ultra-low power consumption, compact area, short distance and high energy efficiency application and other advantages.