46 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 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.

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 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.

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).

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.

1. The name of the design product: USB modular vector network analyzer (BN100+). 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.

This invention relates to a variable-direction dual-band composite antenna assembly, comprising a VHF / UHF band antenna, an S-band antenna, an RF duplexer, a radome, an SMA cable assembly, and a metal cavity. The RF duplexer is fitted and mounted within the metal cavity. One end of the VHF / UHF band antenna is connected to the VHF / UHF band port of the RF duplexer. The other end of the VHF / UHF band antenna is fixedly connected to the S-band antenna. The S-band antenna is connected to the S-band port of the RF duplexer via the SMA cable assembly. Both the VHF / UHF band antenna and the S-band antenna are covered by the radome. This invention features a simple and reasonable structural design, good performance, and achieves miniaturization, flexibility, ease of movement, high gain, and adjustable radiation direction.

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.

1. The name of the design product: frequency doubling module (BP-50). 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 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.

1. The name of the design product: modular dual-port antenna feed network (T9510). 2. The use of the design product: for antenna matching debugging, radio frequency 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.

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 application discloses a design method of a Ku-band metasurface phased array antenna matching layer, establishes a non-full-array antenna model, extracts impedance parameters of a phased array antenna array surface under different frequencies and different scanning states, takes the impedance parameters as boundary conditions, preliminarily optimizes the matching layer, and obtains initial parameters of a matching layer structure; according to an actual phased array antenna periodic structure, the initial parameters of the matching layer structure are verified and optimized to obtain final parameters of the matching layer structure. Compared with the prior art, the application can quickly obtain characteristics of an antenna array surface with less resources, and obtain related parameters of a matching antenna, and finally completes the optimization design of the antenna matching layer.

The utility model relates to the technical field of monitors, and provides an integrated underground water monitor based on Internet of Things, which comprises a tank body, a bottom plate, an antenna, a water level temperature sensor, universal wheels, a fixed seat, a positioning plate and a positioning ring, the tank body is detachably mounted at the top end of the bottom plate, the antenna is detachably arranged on one side of the tank body, a groove matched with the antenna is formed in the bottom plate, a tank groove matched with the tank body is formed in the bottom plate, the tank body and the antenna can be conveniently mounted and dismounted on the bottom plate, and the water level temperature sensor is detachably mounted on the other side of the tank body. The top end of the bottom plate is fixedly connected with a supporting column, and the supporting column is provided with a supporting groove matched with the water level temperature sensor. By means of the technical scheme, the problem that in the prior art, integrated installation and transportation of the underground water monitor are inconvenient is solved.

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.

This invention discloses an NFC antenna assembly, its manufacturing method, and an electronic device. The manufacturing method of the NFC antenna assembly includes the following steps: preparing a PCB circuit board and electronic components, the electronic components including at least a first isolation device and a second isolation device; forming a circuit wiring layer, a first antenna segment, and a second antenna segment of a loop NFC antenna on the PCB circuit board; mounting the electronic components on the circuit wiring layer to form a current loop connecting the antenna matching circuit, the receiving circuit, and the first and second antenna segments of the loop NFC antenna; and connecting the first isolation device in series between the first antenna segment and the second antenna segment; and connecting the second isolation device in series between the receiving circuit and the second antenna segment. This invention solves the problem of low PCB antenna yield caused by antenna short circuits during PCB manufacturing.

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.