30 results about "Antenna matching" patented technology

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 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 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.

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 application relates to the technical field of antenna matching and tuning devices, in particular to a medium wave antenna matching assembly based on double helix inductors, which comprises a shell, a coil set arranged in the shell, a movable magnetic core rod, a lead screw, a variable capacitor, a mounting plate, a coarse tuning knob, a fine tuning knob, an antenna interface and a speed reducer; wherein an operation table is arranged on the shell, the coarse tuning knob and the fine tuning knob are arranged on the operation table; the coil set comprises a first double helix inductor, the magnetic core rod is arranged along the axial direction of the first double helix inductor and can axially move relative to the first double helix inductor; the lead screw is arranged in the shell and is in transmission connection with the magnetic core rod, the coarse tuning knob is in transmission connection with the lead screw so as to drive the magnetic core rod to perform coarse tuning; the variable capacitor is arranged on the mounting plate, the fine tuning knob is in transmission connection with the variable capacitor through the speed reducer so as to perform fine tuning on the variable capacitor; and the antenna interface is arranged on the shell and is electrically connected with the first double helix inductor and the variable capacitor to form an antenna matching network.

The utility model provides a wireless information receiving device based on radio frequency identification technique, including the casing, the casing is pasted with microstrip antenna, is provided with antenna matching spare outside microstrip antenna, the outside of antenna matching is provided with antenna housing, antenna matching spare makes antenna housing and casing conformal, is installed with the amplitude phase adjustment board who is connected with microstrip antenna in the casing, and amplitude phase adjustment board passes through radio frequency connector again and is transmitted to energy management board and signal processing board respectively with radio frequency signal. The utility model not only guarantees the integrity of the appearance of the projectile, and realizes reliable antenna performance.

An NFC antenna selector circuit switch includes an antenna matching circuit having first and second output nodes coupled to an antenna. A first transistor couples a first NFC signal input node to the matching circuit, and a second transistor couples a second NFC signal input node to the matching circuit. Controlling nodes of the first and second transistors are coupled together at a first node, where the first node is coupled to a first voltage rail via a first resistor. A third transistor couples the first node to ground. A first voltage is applied to the first voltage rail. The first voltage has absolute value greater than a maximum voltage present between first and second NFC signal input nodes plus a transistor threshold voltage.

The utility model provides a radio frequency circuit of an antenna matching circuit, which relates to the technical field of antenna matching and comprises a radio frequency module and a receiving module, the receiving module is connected with a matching module, and the radio frequency module is connected with an amplifying module. The matching module comprises a matching unit and a filtering unit. According to the utility model, in the use process of the matching unit and the filtering unit, the detection unit calculates real-time heat of capacitors or inductors in the matching unit and the filtering unit in real time through a formula and receives and processes the real-time heat, and then the power supply unit supplies power to the compensation unit; the self temperature characteristic of the compensation unit compensates the temperature change of the matching unit and the filtering unit, counteracts the capacitance or inductance parameter change caused by temperature rise, stabilizes the circuit performance, ensures that the antenna matching circuit keeps a good working state, guarantees the accuracy and stability of signal processing, and improves the reliability of the antenna matching circuit. Meanwhile, power supply to the compensation unit is automatically started and stopped by the control unit, and energy consumption is reduced.

The invention discloses an antenna assembly and electronic equipment, the antenna assembly comprises a first radiation branch knot, a second radiation branch knot and an antenna matching circuit, the first radiation branch knot is provided with a first coupling end, a first grounding end and a feeding point arranged between the first coupling end and the first grounding end, and the first grounding end is provided with a first grounding point for grounding; the second radiation branch knot is provided with a second coupling end and a second grounding end, the second coupling end and the first coupling end form a coupling gap, the second grounding end is provided with a second grounding point used for grounding, and the antenna matching circuit is electrically connected to the first radiation branch knot through the feeding point. The antenna matching circuit is used for enabling the first radiation branch knot to support a first frequency band, enabling the first radiation branch knot and the second radiation branch knot to support a second frequency band together and enabling the second radiation branch knot to support a third frequency band when current is fed in. According to the antenna assembly and the electronic equipment provided by the embodiment of the invention, the research and development cost and the production cost can be reduced, and the carrier aggregation performance of the antenna assembly is improved.

This invention discloses a method and apparatus for transmitting audio signals using a multi-band multiplexed wireless microphone. The method includes: converting an audio signal into a radio frequency modulated signal and performing linear power amplification to obtain a wideband radio frequency signal; then, directionally guiding the wideband radio frequency signal into a target filtering path corresponding to a preset frequency band; obtaining a clean target frequency band radio frequency signal through narrowband constraint filtering of a bandpass filter within the path; finally, converging the signal into a single path and transmitting it to a receiving end based on an antenna matching its preset frequency band. This invention proposes a method and apparatus for transmitting audio signals using a multi-band multiplexed wireless microphone. By using linear power amplification to avoid harmonic spurious signals generated during high-power output, directionally guiding the wideband signal to a path corresponding to a preset frequency band and filtering out spurious signals through narrowband constraint filtering of a bandpass filter, and combining this with an antenna to improve transmission efficiency, it can solve the problem of incompatibility between spurious signal suppression and antenna efficiency under high-power output of ultra-wideband wireless microphones.

System (100) for controlling an antenna matching network (106, 506), comprising: an RF path (102) for generating an RF signal (114, 514); a lookup table (112, 512) with a state table that correlates antenna states with impedance values, wherein the state table contains entries, each entry comprising an antenna state and a corresponding range of impedance values; and a state table analysis component (110, 508) for generating a matching network control signal (122, 536) from the RF signal using the lookup table, wherein the state table analysis component (110, 508) is configured to use a measured impedance and a reference state to identify the corresponding antenna state in the state table and to use the antenna state from the state table to generate the matching network control signal (122, 536).

The present application discloses a vehicle tire detection device, including a TPMS (Tire Pressure Monitoring System) sensor, an antenna matching network, and a terminal antenna. The TPMS sensor uses ASK / OOK / FSK transmission technology with a data transmission rate greater than 20 kbps. The TPMS sensor is connected to the terminal antenna through the antenna matching network. The terminal antenna is one of a valve stem, a metal base, or a tire rim.

The invention relates to the technical field of wireless communication, and discloses an environment backscatter communication enhancement method and system based on biphase detection, and the method comprises the steps: obtaining an environment radio frequency signal received by an antenna, and generating an in-phase component I-path signal and an orthogonal component Q-path signal through two-path orthogonal demodulation, generating a binary state identifier representing an antenna matching state; a historical state identifier sequence is formed based on the identifier, an energy-communication alternating period is identified, the average duration is counted, and a phase switching prediction signal is generated in combination with the identifier; receiving a prediction signal to generate a switching control sequence, analyzing a target state type to generate a modulation control instruction, and executing the modulation control instruction to form closed-loop optimization; according to the invention, bit synchronization drift and judgment threshold offset caused by carrier multipath attenuation in the shadow area of the large-span metal structure can be effectively relieved, and the communication stability is guaranteed.

The application discloses an antenna matching detection method of a wireless AP and a related device, and relates to the field of communication technologies.In the application, a CPU performs the following operations on two antennas corresponding to a transmission channel of the wireless AP: in the process of transmitting a to-be-sent signal to one antenna for sending, the feedback power of the to-be-sent signal is obtained through a coupler; based on the obtained feedback power of the to-be-sent signal corresponding to each of the two antennas, a feedback coefficient is obtained; when the feedback coefficient is greater than a preset standing wave threshold, it is determined that at least one of the two antennas is abnormally matched with the wireless AP. In this way, the approximate standing wave ratio of the two antennas is calculated by using a double-antenna detection method, only one coupler needs to be installed in a radio frequency front end, the installation and operation and maintenance costs of the wireless AP are greatly reduced, and the accuracy of a traditional standing wave detection method is retained.

The utility model relates to the technical field of Bluetooth earphones, and discloses a dual-mode signal enhancement circuit module based on a Bluetooth earphone, comprising a Bluetooth dual-mode module; a signal amplification module; an antenna matching module; a power management module; through the design of the Bluetooth dual-mode module, the Bluetooth earphone supports a BT protocol and a BLE protocol at the same time, so that the Bluetooth earphone can be compatible with more devices, meets communication requirements in different scenes, is low in power consumption, supports audio transmission and data transmission, facilitates intelligent selection of an optimal communication mode for data transmission, and improves the stability and reliability of signals; through the design of the signal amplification module, weak signals obtained from the antenna are converted into stable signals for subsequent processing, it is ensured that the Bluetooth earphone stably receives Bluetooth signals from external equipment, the definition of the signals is improved, through signal enhancement, signal attenuation and interference are effectively reduced, and the communication quality is improved.

A tire pressure sensor includes: a printed circuit board, a battery and a helical antenna assembly, processed through an injection molding process to produce a sensor assembly. The helical antenna assembly includes an antenna support and a helical antenna on an outer sidewall of the antenna support. The antenna support is internally hollow, and a helical groove is on the outer sidewall of the antenna support. The helical antenna is wound in the helical groove. A plurality of fasteners for fixing the circuit board is at a bottom of the antenna support. A pressure sensing component and an antenna matching circuit are printed on a printed circuit board. The antenna matching circuit is configured to transmit a radio frequency signal which is output by the pressure sensing component and obtained by the pressure sensing component modulating a sensed tire pressure signal to an input end of the helical antenna.

The utility model provides an intelligent terminal local antenna assembly capable of flexibly applying an antenna tuning switch, which comprises a high-frequency receiving antenna and an intermediate-frequency main transmitting antenna which are arranged on a metal frame of intelligent equipment, and the high-frequency receiving antenna and the intermediate-frequency main transmitting antenna are arranged adjacently. The mainboard is provided with a first tuning switch matched with the high-frequency receiving antenna, the mainboard is provided with a second tuning switch matched with the intermediate-frequency main transmitting antenna, the high-frequency receiving antenna not only plays a role in high-frequency receiving, but also serves as a parasitic antenna of the intermediate-frequency main transmitting antenna, and the intermediate-frequency main transmitting antenna is connected with the high-frequency receiving antenna through the first tuning switch. The high-frequency receiving antenna forms different parasitic antenna lengths, the resonance position offset of the intermediate-frequency main transmitting antenna is influenced through the combined action of the first tuning switch and the second tuning switch, and the radiation performance of the intermediate-frequency main transmitting antenna is adjusted. The antenna assembly is very high in total radiation efficiency, and due to reasonable antenna layout, the antennas do not interfere with each other during working.

The invention relates to an NFC circuit switch. An NFC antenna selector circuit switch includes an antenna matching circuit having first and second output nodes coupled to an antenna. A first transistor couples a first NFC signal input node to the matching circuit, and a second transistor couples a second NFC signal input node to the matching circuit. The control nodes of the first and second transistors are coupled together at a first node, wherein the first node is coupled to a first voltage rail via a first resistor. A third transistor grounds the first node. A first voltage is applied to the first voltage rail. An absolute value of the first voltage is greater than a maximum voltage present between the first and second NFC signal input nodes plus a transistor threshold voltage.

1. The name of the design product: modular antenna feed network (R6). 2. The use of the design product: for antenna matching debugging, radio frequency component testing and research and development, providing integrated 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 utility model discloses a signal transmission chip circuit board for interaction of low-frequency signals and high-frequency signals, which belongs to the technical field of circuit boards and comprises a circuit board body provided with a plurality of power supply units, a radio frequency transceiving unit, an antenna matching unit and an information processing unit. The plurality of power supply units, the radio frequency transceiving unit and the antenna matching unit are electrically connected with the information processing unit, and the information processing unit is connected with a CAN low-frequency communication unit and a CAN high-frequency communication unit; according to the utility model, low-power-consumption power supply is carried out through the power supply unit, basic intelligent card key function implementation is carried out through the radio frequency transmit-receive unit and the antenna matching unit, and interaction of low-frequency signals and high-frequency signals of the CAN low-frequency communication unit and the CAN high-frequency communication unit is carried out in the information processing unit, so that the use requirements of users are met.

This application provides an antenna matching circuit, filtering method, apparatus, electronic device, medium, and product. The antenna matching circuit includes: a processing unit, configured to determine the frequency range of the electromagnetic waves acquired by the antenna, and when the frequency range includes an interference frequency band, send a first control signal to the control terminal of a first switch; the first switch includes a control terminal, an input terminal, and at least one output terminal, the input terminal of the first switch being connected to the main circuit of the matching circuit, and the output terminal of the first switch being connected to the input terminal of the corresponding filtering module; the control terminal of the first switch is connected to the processing unit, configured to, upon receiving the first control signal, parse the first control signal to obtain the identification information of the target filtering module, and activate the target filtering module, which can effectively improve antenna isolation and overall performance, thereby improving antenna radiation efficiency and communication quality.

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

The invention relates to the technical field of communication, in particular to a satellite communication terminal. The satellite communication terminal comprises a transmitting antenna, a receiving antenna and a chip, the transmitting antenna and the receiving antenna are respectively placed on two opposite side edges of the satellite communication terminal, and at least one of the two opposite side edges points to the sky; the transmitting antenna is connected with a transmitting port of the chip, and the receiving antenna is connected with a receiving port of the chip; each of the transmitting antenna and the receiving antenna comprises an antenna radiator, an antenna feed circuit, an antenna matching device and a ground coupling device; the to-ground coupling device of the transmitting antenna is connected to the ground through a metal elastic sheet; an antenna feed circuit and an antenna matching device of the transmitting antenna are connected to an antenna radiator of the transmitting antenna through a metal elastic sheet; the to-ground coupling device of the receiving antenna is connected to the ground through a metal elastic sheet; and the antenna feed circuit and the antenna matching device of the receiving antenna are connected to the antenna radiator of the receiving antenna through the metal elastic sheet.

The embodiments of the present disclosure relate to an antenna matching circuit capable of configuring an adaptive antenna matching topology in an electronic device supporting wireless communication. To this end, the electronic device may include an antenna radiator, an RF module that processes radio frequency (RF) signals, a feed line that electrically connects the antenna radiator and the RF module, a switch circuit formed in a parallel structure with respect to the feed line by electrically coupling a plurality of points including at least one first point and at least one second point located on the feed line, a first lump element arranged on the feed line such that the at least one first point is electrically connected to the at least one second point, and a second lump element arranged such that the at least one first point is electrically connected to at least one first terminal included in the switch circuit. Various other embodiments may be possible.