60 results about "Antenna impedance" patented technology

The invention provides a WIFI antenna impedance matching parameter generation method and device, equipment and a storage medium, and relates to the field of radio frequency circuit design. The method comprises the steps of obtaining input parameters in response to input operation; determining an initialization optimization parameter according to the input parameter; wherein the input parameter is basic data used for generating the impedance matching parameter of the WIFI antenna. On the basis of a preset optimization algorithm and the initialized optimization parameters, executing an operation of globally searching for an optimal solution, and determining candidate element parameters; and according to a preset application resonance constraint condition, carrying out forced correction on the candidate element parameters. Determining fundamental frequency impedance according to the forcibly corrected candidate element parameters; and if it is determined that the fundamental frequency impedance meets a preset fundamental frequency impedance matching degree threshold, determining that the candidate element parameters are WIFI antenna impedance matching parameters. Therefore, the problems of low design efficiency and single optimization target in the prior art are solved.

A wireless earbud may have a head and a stalk. A speaker may be disposed in the head. An antenna may be disposed in the stalk. One or more radios may transmit a radio-frequency signal in high and low bands over high and low band arms of the antenna. A signal coupler may be coupled to the antenna. The signal may include scheduled transmission blocks and optionally unscheduled transmission blocks. A processor may measure impedance of the antenna in the high and low bands using the signal coupler and the transmitted signal. The processor may detect a gesture based on an order of changes in the impedance in the high and low bands. The processor may take suitable action based on the detected gesture. The gesture may include, for example, a volume up or down gesture in implementations where the high and low band arms extend parallel to the stalk.

This invention relates to a broadband high-gain radar antenna based on a metasurface and its applications, belonging to the field of antenna design. From top to bottom, it consists of a metasurface layer (Rogers RO3003C substrate + periodic ideal electrical conductor rectangular elements), an air cavity, a radiating layer (ideal electrical conductor patch with rectangular slots), a ground plane with rectangular slots, and a feed layer (microstrip line), operating near 12.4 GHz. The metasurface elements are optimized through characteristic mode analysis, the air cavity improves impedance matching, and the microstrip line is fed through the rectangular slots of the ground plane and the slots of the radiating layer. CST simulations show that the antenna has an impedance bandwidth of 1800 MHz in the 11.6–13.4 GHz range, a peak gain of 8.37 dBi, and a radiation efficiency of nearly 100%, making it suitable for millimeter-wave radar and providing new ideas for its miniaturization and high performance.

An antenna impedance matching design circuit includes a load circuit, a filter circuit and a matching circuit which are connected to each other. The load circuit is connected to one end of the filter circuit for connecting a near field communication chip, and the matching circuit includes a plurality of capacitors.

The utility model discloses an integrated communication antenna, relates to the technical field of communication antennas, and aims to provide an integrated communication antenna which is low in cost, convenient to produce and assemble, and not easy to be influenced by other antennas, and adopts an FR4 material single-sided or double-sided copper-clad PCB (printed circuit board) or FPC (flexible printed circuit) board with stable performance as a circuit board to be positioned at the top layer, and a loading capacitor board is positioned at the middle layer. The substrate attached to the bottom layer (shared with other antennas) and the loading capacitor plate are arranged at an idle position, the impedance of the communication antenna can be effectively adjusted while other antennas on the bottom layer are not affected, the communication antenna integrally adopts a longitudinal integration mode, the required longitudinal space is very small, and compared with a traditional transverse integration mode, the miniaturization requirement is easier to meet.

An apparatus for wireless communication includes a processing system. The processing system includes one or more processors and one or more memories coupled to the one or more processors. The processing system is configured to dynamically adjust antenna impedance matching circuitry in accordance with a codeword and as a function of a traffic pattern. The processing system is further configured to perform a wireless communication operation associated with the traffic pattern and in accordance with the codeword.

The invention relates to a broadband high-gain radar antenna based on a metasurface and application, and belongs to the field of antenna design. The antenna comprises a metasurface layer (RogersRO3003C substrate and a periodic ideal electric conductor rectangular unit), an air cavity, a radiation layer (an ideal electric conductor patch with a rectangular slot), a grounding plane with a rectangular slot and a feed layer (microstrip line) from top to bottom in sequence, and works near 12.4 GHz. The metasurface unit is optimized through characteristic mode analysis, the air cavity improves impedance matching, and the microstrip line is coupled with the radiation layer gap for feeding through the grounding plane rectangular groove. CST simulation shows that the impedance bandwidth of the antenna is 1800 MHz at the frequency of 11.6-13.4 GHz, the peak gain is 8.37 dBi, the radiation efficiency is nearly 100%, the antenna can be used for millimeter wave radar, and a new thought is provided for miniaturization and high performance of the antenna.

A sensor system configured to provide an indication of a sensed parameter, the sensor system comprising: a reader comprising a reader antenna configured to transmit a carrier signal; a tag comprising: a tag antenna configured to receive the carrier signal; power harvesting circuitry coupled to the tag antenna and configured to produce an operating voltage from the receiver carrier signal; the voltage-controlled oscillator, VCO, circuitry coupled to the power harvesting circuitry and configured to receive the operating voltage therefrom, wherein the VCO circuitry comprises a VCO configured to generate an output signal having a frequency which varies based on the sensed parameter, and wherein the VCO circuitry is configured to modulate an impedance of the tag antenna according to a timing parameter selected based on the frequency of the output signal from the VCO; a controller coupled to the reader antenna and configured to: (i) identify an indication of the timing parameter of the impedance modulation of the tag antenna based on detected changes in the reader antenna impedance, and (ii) determine an indication of the sensed parameter based on the identified indication of the timing parameter.

A thermally adaptive antenna system having an antenna structure, an EM) power signal, a DC power signal, an impedance tuner, a temperature sensor in the antenna, a DC-DC conversion component, and a microcontroller. The microcontroller provides a tuning command to the impedance tuner, causing the impedance tuner to compensate for an impedance change in the antenna due to a temperature change in the antenna. An environmentally adaptive antenna system has an antenna structure, an EM power signal, a DC power signal, an EM power splitter, a directional coupler, a reference receiver, a measurement receiver, an impedance tuner, and a controller. The controller calculates antenna impedance change based on observed changes in return loss, calculates a corresponding correction to the antenna impedance, and sends a command to the impedance tuner to implement the correction to the antenna impedance.

The invention discloses a PC5 antenna performance enhancement method and system based on an AI large model, and relates to the field of antenna performance enhancement, and the method comprises the steps: constructing an antenna performance knowledge base; constructing an antenna performance data set in combination with a simulation experiment; based on a similarity algorithm, introducing an environment variable, and constructing an antenna performance environment enhancement data set; constructing a PC5 antenna performance enhancement prediction model, and obtaining an antenna performance index prediction sequence; compressing the cloud PC5 antenna performance enhancement prediction model into a lightweight model, and dynamically predicting an optimal antenna tuning parameter according to vehicle real-time environment data; the optimal antenna tuning parameter is dynamically predicted according to the real-time environment data of the vehicle, and the antenna impedance is re-matched to a set value by using the reconfigurable impedance matching network. The method has the advantages that the training data used for PC5 antenna performance enhancement are effectively generated, and the PC5 antenna performance is dynamically enhanced through the cloud PC5 antenna performance enhancement prediction model and the lightweight model in combination with real-time monitoring data.

The utility model relates to a control circuit of an intermediate frequency antenna impedance matcher. The control circuit comprises a radio frequency relay main loop, a signal control circuit, a state feedback circuit and a display circuit. The circuit overcomes the long-standing defect that a main radio frequency path of an existing intermediate-frequency antenna impedance matching box is grounded through a signal relay contact for a long time, effectively prevents lightning stroke from generating induction current through an antenna end to damage components such as a capacitor and a relay in a control circuit, and guarantees stable operation of a matching box unit when an intermediate-frequency transmitter operates. The problem that electrical faults of a capacitor, a relay and the like in the matching box occur frequently in recent years is thoroughly solved, stability and reliability of intermediate frequency NAVTEX frequency broadcasting of a coast radio station are guaranteed, meanwhile, the technical scheme can be applied to other types of antenna impedance matchers in an extended mode, and the stability of the antenna impedance matching box is further improved.

The present disclosure relates to a diplexer with an impedance inverter. The diplexer can be used to isolate a transmitter and a receiver that share a common antenna. The diplexer is balanced by using an impedance gradient that provides an impedance that causes a balun of the diplexer to cut off access to the common antenna rather than replicate the antenna impedance. Such a cut off can have lower insertion loss than a diplexer that replicates the antenna impedance only to separate differential signals and common mode signals of the receiver and transmitter.

An apparatus for wireless communication includes a processing system. The processing system includes one or more processors and one or more memories coupled to the one or more processors. The processing system is configured to dynamically adjust antenna impedance matching circuitry in accordance with a codeword and as a function of a traffic pattern. The processing system is further configured to perform a wireless communication operation associated with the traffic pattern and in accordance with the codeword.

Embodiments of the present application provide a communication device and a working method of the communication device to solve the problem of power waste caused by active signal receiving of a receiver in the prior art. The communication device comprises communication circuitry, which comprises an antenna, an impedance matching network, a control circuit, a receiver, a protocol processor, and a signal processing circuit. The antenna is connected with an input end of the impedance matching network, output ends of the impedance matching network are connected with the control circuit and the signal processing circuit respectively, an output end of the signal processing circuit and an output end of the control circuit are connected with the receiver respectively, and the receiver is connected with the protocol processor. The antenna sends the received radio frequency signal to the control circuit and the signal processing circuit through the impedance matching network. When the control circuit outputs a high level according to the radio frequency signal, the receiver is powered and receives the radio frequency signal sent by the signal processing circuit to send to the protocol processor, so that the protocol processor performs protocol processing on the radio frequency signal.

The application relates to the technical field of smart home, in particular to a simulation method and system suitable for a multi-level family energy management system. The method comprises the following steps: obtaining smart home data, and extracting communication protocol data; detecting an equipment abnormal state based on the communication protocol data, and obtaining the equipment abnormal state; constructing a smart home model based on the smart home data, and performing smart home control simulation by using preset control instructions to generate smart home control data; performing energy consumption analysis according to the smart home control data to obtain energy consumption data; performing circuit board soldering hot state fault decoding according to the equipment abnormal state to obtain circuit board fault data; performing antenna impedance etching change diagnosis according to the equipment abnormal state to obtain antenna damage data, and performing signal decay spectrum deduction to generate signal attenuation data. The application improves the equipment fault detection, the self-adaptive ability of the system and the overall energy efficiency management rate based on the smart home technology.

A device for detecting an approach of a part of a user's body or of a portable user equipment, intended to be housed on board a motor vehicle, including: a near-field communication antenna configured to transmit signals at a high frequency selected between 3 and 30 MHz, the antenna being able to detect the approach of a portable user equipment and to communicate in near-field mode with the portable user equipment. The antenna including at least one winding that extends continuously in the form of a set of comb-shaped rods such that the antenna is able to generate a variation in capacitance in response to the approach of a part of a user's body; a controller for controlling the antenna; and a measurer for measuring a variation in impedance of the antenna, generated by the variation in capacitance.

This invention relates to the field of antenna technology, and specifically discloses an antenna and a wireless device, including a substrate and an antenna body. The antenna body is at least partially mounted on the surface of the substrate. The antenna body includes a main stub, an adjustable stub, a feed point, and a ground plane. The main stub is at least partially mounted on the surface of the substrate. The feed point is located on the main stub, and the ground plane is coupled to the main stub. The adjustable stub is located on the main stub and can move along a first direction to adjust the antenna impedance. Through this method, the antenna of this invention can match the impedance of the antenna to the impedance of the feed line by moving the adjustable stub, thereby enhancing anti-interference capability and radiation efficiency.

The application discloses a wide-beam circularly polarized antenna based on a cross dipole, wherein the end of an electric dipole is designed into a T-shaped structure to reduce the size of the antenna; a parasitic patch is introduced to widen the impedance bandwidth and the beam width of the antenna; and the beam is widened and the circular polarization angle range is increased through the method that the vertical monopole pattern is complementary to the cross dipole.

The invention discloses a four-direction pattern reconfigurable antenna. The antenna is of a rotational symmetric structure composed of a single-layer dielectric substrate and a double-layer four-direction radiation structure. The antenna takes an electric dipole structure as a basic radiation structure, directional radiation of the antenna is realized by introducing a reflection structure, radiation gain of the antenna is improved by introducing a guide structure, impedance matching of the antenna is improved and bandwidth of the antenna is broadened by adding a U-shaped groove structure in the electric dipole radiation structure, and in order to realize reconfiguration of a directional diagram of the antenna, the antenna is provided with a U-shaped groove structure. An antenna structure is rotated, four pairs of PIN diodes and corresponding control circuits are added in parallel double lines of a feed structure, and the radiation direction of the antenna is controlled by controlling the opening and closing states of the PIN diode pairs. Due to introduction of the reflection structure and the guide structure, the directional radiation capability and the antenna gain of the antenna are improved, the communication distance is increased, and the working bandwidth of the antenna can be widened; the design of the direct-current feed structure enables the radiation direction of the antenna to be controlled more flexibly.

The invention discloses a miniaturized high-gain millimeter wave waveguide slot array antenna, which comprises a one-to-two waveguide power divider and a metal waveguide tube, and is characterized in that the one-to-two waveguide power divider is mounted at the head of the metal waveguide tube in a butt joint manner and is used for feeding two ports of the metal waveguide tube with equal amplitude and same phase; the metal waveguide tube is a standard Ka wave band waveguide tube, a wave absorbing material is embedded in the tail portion of the metal waveguide tube, the tail portion of the metal waveguide tube is blocked through a metal sealing plate, and the metal sealing plate is used for carrying out short circuit on the upper bottom face and the lower bottom face of the tail portion of the metal waveguide tube and forms a matched load together with the wave absorbing material to adjust antenna impedance matching. Two columns of round-head strip-shaped gaps are symmetrically etched in the metal waveguide tube in the longitudinal direction, each column of round-head strip-shaped gaps comprises 20 round-head strip-shaped gaps which are etched at equal intervals, and the offset of the 20 round-head strip-shaped gaps in the same column relative to the waveguide center axis is calculated according to Taylor distribution.

The present disclosure provides a sensor assembly for non-invasive temperature measurement using microwave radiometry. The assembly comprises a circuit board with a thermistor, capacitor, and inductor, where the inductor electrically isolates microwave signals from temperature sensing signals. A coaxial connector is positioned at one end of the circuit board with an antenna aperture at the opposite end. A shield layer extends over the circuit board with a sensor region, transition region, and extended region that are offset from the circuit board components. The shield layer is oriented at an angle relative to the circuit board. The inductor utilizes parasitic capacitance to improve antenna impedance matching, while the capacitor provides microwave signal isolation for the thermistor to prevent interference with signal detection.

The utility model discloses a flexible anti-metal lighting tag antenna, which comprises a radiation part, a short circuit part and a grounding part, and is characterized in that the rear side of the radiation part is fixedly bonded with a flexible base material layer; the radiation part comprises a radiation area, a tuning branch knot and a light-emitting integration part. According to the utility model, integrated processing is carried out by adopting an aluminum etching process, so that the processing length and width of the tuning branch knot can be conveniently adjusted according to frequency band requirements of different regions, the real part and imaginary part of the impedance of the antenna can be adjusted, and the real part and imaginary part of the impedance of the antenna can be in conjugate matching with the impedance of a tag chip; in the aluminum etching process, the center frequency of the tag can be adjusted by adjusting the folded processing position of the short circuit part, so that the tag can be conveniently suitable for the local RFID frequency band requirement, and in addition, in the application, the visualization of the tag antenna in the working state is realized according to a preset logic lighting mode when the tag antenna is activated by electromagnetic induction; and people can conveniently and intuitively find the information.

The invention discloses a phased-array antenna beam forming test method in a darkroom-free environment, and relates to the technical field of satellite communication terminal complete machine testing, comprising the steps of initializing test system configuration, setting test parameters, initializing an antenna state, establishing a test environment, and connecting a test antenna with a channel simulator; cross coupling of non-corresponding channels is isolated and reduced through an algorithm, a signal transmission link between a test antenna and a tested antenna is established through a wireless channel by adopting a virtual wire connection mode, non-contact test is realized, beam forming test is performed, a mobile station moves to a preset test area, impedance of the test antenna is adjusted by adopting an electronic tuning mode, and the antenna is tested. The beam former realizes independent control of an uplink and a downlink, analyzes a test result and generates a report, does not need to depend on fixed test facilities such as a microwave anechoic chamber and a calibration tower, can directly test in an actual working scene, and is particularly suitable for field test of mobile equipment such as a large vehicle-mounted phased array system.

The invention discloses a low cross polarization antenna and a deep learning optimization design method, and the antenna employs a differential feed structure of a similar H-shaped coupling groove and a vertical metal pillar to suppress cross polarization, does not need to be externally connected with a single-ended-differential converter, expands the bandwidth and stabilizes the gain through a double-T-shaped matching short-circuit line structure, and achieves the low cross polarization. And miniaturization and high integration of the antenna are realized by using an embedded vertically stacked differential excitation framework. According to the deep learning optimization design method, an antenna performance mapping model is constructed based on a CNN-Transform hybrid neural network, a simulated annealing algorithm is combined to optimize a training process and a multi-target reverse design is combined to screen optimal structure parameters, and finally, the performance of the optimization method is verified through full-wave electromagnetic simulation. According to the method, the physical mechanism of the antenna and the deep learning model are combined, collaborative optimization of the impedance bandwidth and the gain of the antenna is achieved, the design requirement for balance of multiple performance indexes of the antenna is met, and the designed antenna has the advantages of being low in cross polarization, stable in gain and small in size.

The invention discloses a microwave transmission system for NV color center magnetic detection and a transmission method thereof, the microwave transmission system for NV color center magnetic detection comprises a microwave generator, a microwave power amplifier, a circulator, an impedance matching adjusting device, a microwave antenna and a 50-ohm terminal load, the microwave power amplifier is connected with the microwave generator through a coaxial cable; the circulator is connected with the output end of the microwave power amplifier; the microwave antenna is connected with the output end of the impedance matching network and used for radiating microwave energy to the NV color center in the blind hole of the diamond anvil cell. The 0.1 mm micro electric small loop antenna is matched with the diamond anvil cell blind hole, the L-shaped LC network is adopted to match the antenna impedance from 0.056 + j3.5 ohm to 50 ohm, microwave reflection is remarkably reduced, the ODMR spectrogram contrast ratio and symmetry are improved, and the magnetic field analysis precision reaches the order of magnitude. A protection mechanism formed by the circulator and the 50-ohm load isolates reflected signals, equipment damage is avoided, it is guaranteed that the system stably operates at the frequency band of 2.4-3.3 GHz, and core hardware support is provided for high-voltage magnetic detection.

This invention proposes a dual-polarization, large-angle scanning planar tightly coupled array antenna, comprising multiple antenna elements periodically arranged from a wide-angle impedance matching layer of a metasurface, a metallic radiator, and a metallic ground plane. The wide-angle impedance matching layer consists of two metasurfaces stacked one above the other, each containing a periodically arranged plurality of metallic rings and a square metallic patch of gradually varying size. The wide-angle impedance matching layer of this invention can mitigate the impact of instability caused by rapid changes in antenna impedance on the scanning angle, facilitating impedance matching over a wide bandwidth and providing beam scanning capability over a wide angle range. Furthermore, the metallic radiator can eliminate bandwidth degradation caused by common-mode resonance within the antenna's frequency band, effectively simplifying the antenna structure while maintaining ultra-wideband characteristics.

A system for terrestrial and satellite communication includes: at least one antenna; an impedance element electrically coupled to a satellite transceiver; and a first switch electrically coupled to the at least one antenna and configured to selectively electrically couple the at least one antenna to one of (1) the satellite transceiver via the impedance element and (2) a terrestrial transceiver; wherein: the at least one antenna has an at least one antenna impedance that is tuned for the at least one antenna to operate at a first frequency band for the terrestrial transceiver; and the impedance element is configured to tune the at least one antenna impedance for the at least one antenna to operate at a second frequency band, different from the first frequency band, for the satellite transceiver.

The application relates to a dual-frequency antenna and a wireless communication device, which comprises a dielectric plate, a feeding terminal, a first frequency band dipole antenna and a second frequency band dipole antenna, the feeding terminal being arranged on the dielectric plate; the first frequency band dipole antenna comprises two first oscillator arms arranged on the dielectric plate, the two first oscillator arms respectively extending in opposite directions from the positive pole and the negative pole of the feeding terminal as starting points; the second frequency band dipole antenna comprises two second oscillator arms arranged on the dielectric plate, the two second oscillator arms respectively extending in opposite directions from the positive pole and the negative pole of the feeding terminal as starting points, so that the first frequency band dipole antenna and the second frequency band dipole antenna are cross-distributed; a gap radiation matching branch is connected between the first oscillator arm with one of the positive pole and the negative pole as a starting point and the second oscillator arm with the other of the positive pole and the negative pole as a starting point. The application can improve the antenna impedance matching effect and the radiation efficiency.

Wireless Electronic Device This description relates to an electronic device comprising an antenna (201) and an antenna impedance matching circuit (202) comprising first and second resistors (R201, R202) that can be activated according to the value of a field received by the antenna (201) and whose values ​​are independent of the value of said field received by said antenna (201), wherein: - a first terminal of said first resistor (R201) is connected to a first terminal of said antenna (201); - a second terminal of said second resistor (R202) is connected to a second terminal of said antenna (201) different from said first terminal. Figure for the abbreviation: Fig. 2

A communication device for a vehicle, including a single communication antenna, a matching circuit configured to match the impedance of the communication antenna, a high-frequency processing module connected to the matching circuit and configured to process high-frequency signals received by the antenna, and a passive selection circuit connected to the matching circuit and configured to communicate with a near-field communication module which receives signals via the antenna, to operate in an open circuit when the strength of the signals received by the antenna is below a predetermined strength threshold, and to transfer the signals received by the antenna to the near-field communication module via the matching circuit when the strength of said signals is above the predetermined strength threshold.