312 results about "Radiation properties" patented technology

Embodiments of the present invention provide a therapeutic device. The therapeutic device includes an inner layer including a plurality of sensing locations and a plurality of stimulating locations constructed therewithin. Furthermore, the therapeutic device includes a plurality of stimulation elements located within the plurality of stimulating locations. The therapeutic device further includes a plurality of optical fibers including a plurality of respective first optical endpoints and a plurality of respective second optical endpoints, the plurality of first optical endpoints located within the plurality of sensing locations. Furthermore, the therapeutic device includes an optical sensor configured to receive electromagnetic radiation from the plurality of second optical endpoints. The therapeutic device also includes a control module configured to determine radiation characteristics of the electromagnetic radiation received by the optical sensor and activate one or more of the plurality of stimulation elements in correlation with the determined radiation characteristics.

The invention discloses a closed-loop self-adjusting method for online defect identification and real-time feedback in the additive manufacturing process of a titanium alloy component based on intelligent sensing, belongs to the field of laser additive manufacturing, and solves the key problems of insufficient defect identification capability, quality control lag and the like in the current additive manufacturing process. The method is based on a multi-mode sensor architecture, integrates an infrared thermal imager, a molten pool camera and a spectrum sensor, and synchronously monitors a molten pool thermal field, radiation characteristics and surface topography. Traditional image processing and signal analysis are adopted to extract defect features such as air holes and cracks, and calibration is implemented in combination with off-line detection such as industrial CT. The recognition result is analyzed in real time through the central control platform, causes are automatically diagnosed based on defect types and distribution characteristics, parameters such as laser power and scanning paths are dynamically adjusted by matching a preset control strategy, and defect suppression and online repair are achieved. And a closed-loop self-adaptive dynamic adjustment mechanism improves the forming quality and reliability. The method is suitable for aerospace and other scenes with extremely high requirements for the quality of large complex titanium alloy components.

The invention relates to a coal field fire high-temperature area identification and judgment method. The coal field fire high-temperature area identification and judgment method comprises the following steps: S10, delimiting a target area of a coal field, and respectively acquiring various data in the target area; s20, establishing a time rule model of temperature change through thermal-time sequence coupling; s30, establishing an incidence relation between temperature and radiation characteristics through thermal-spectral coupling; s40, establishing a chemical reaction association relationship between temperature and gas release through heat-gas coupling; and S50, constructing a three-dimensional feature space through the integration of S20, S30 and S40, classifying the three-dimensional feature space through machine learning, and outputting the probability corresponding to the high-temperature type. The coal field fire high-temperature area identification and judgment method has the advantages that high-precision and strong-anti-interference high-temperature area identification is achieved, and reliable technical support is provided for coal field fire monitoring.

The invention provides an antenna assembly and electronic equipment. The electronic equipment comprises a middle frame, the middle frame comprises a frame and a middle plate, the frame surrounds the middle plate, and the frame comprises a first edge extending in the first direction, a second edge extending in the second direction and a bending area connected to the first edge and the second edge; the antenna assembly comprises a first antenna unit and a second antenna unit, the first antenna unit and the second antenna unit are arranged on the two sides of the bending area respectively, the first antenna unit is arranged on the first side, and the second antenna unit is arranged on the second side; the orthographic projection of the first antenna unit on the plane where the middle plate is located and the orthographic projection of the second antenna unit on the plane where the middle plate is located are not overlapped, so that the antenna assembly has better radiation characteristics, and the electronic equipment has better communication performance.

The invention belongs to the field of electromagnetic numerical methods, and relates to a rapid simulation solving method for radiation characteristics of a large-scale array antenna. In the simulation solution process of the large-scale array antenna, a regional decomposition technology is adopted: firstly, m * n antenna units in the center of the large-scale array antenna are selected as small-scale array antennas; then, establishing a unit model of an antenna array, and performing corresponding simulation solution for a small-scale array antenna according to the arrangement of the array; thirdly, constructing a matrix equation for finite element region decomposition solution, and obtaining a far field of the small-scale antenna array through matrix multiplexing simulation solution; further, a far field of a large-scale array antenna is expanded; and finally, obtaining a radiation far-field parameter result of any amplitude phase distribution by changing feed source parameters of the large-scale array antenna excitation unit according to actual requirements. According to the method, the radiation characteristics of the large-scale array antenna can be quickly simulated and analyzed only by carrying out actual simulation calculation on a small-scale antenna array.

The invention relates to the technical field of array antennas, in particular to a sparse linear array beam forming method and system with unit rotation and mutual coupling considered. Array elements are obtained, Euler angle derivation is carried out on rotation of the array elements around the z axis, and a radiation electric field after rotation is obtained; setting a beam forming target according to the electric field of the radiation field; according to a beam forming target, optimizing the position, the rotation angle and the excitation phase of an array element by adopting a random optimization algorithm, and generating an initial beam scheme; an active directional diagram is extracted from the initial beam scheme according to full-wave simulation, the active directional diagram is combined with a CAL-SAPSO algorithm to optimize the array element position, the rotation angle and the excitation phase, and a final array element directional diagram is generated; according to the invention, by introducing array element rotation and considering a mutual coupling effect, efficient beamforming of the sparse wiring array is realized, the radiation characteristic of the antenna array can be adjusted more finely, the peak side lobe level and the cross polarization level are effectively reduced, and the overall performance of the system is improved.

Embodiments of the present application provide a foldable electronic device, including an antenna. The antenna utilizes the first frame and the second frame provided in the foldable electronic device as radiators. A partial frame of the first frame serves as a feeding stub, and a partial frame of the second frame serves as a parasitic stub. By providing a slit in the parasitic stub, the radiation aperture of the parasitic stub is increased to improve the radiation characteristics of the antenna, so that the electronic device has better communication performance.

The invention discloses a data-driven high-infrared-radiation-characteristic high-entropy rare earth tantalate material screening method and application, and belongs to the technical field of thermal barrier coating materials. The method aims at breaking through the infrared radiation performance bottleneck of a traditional rare earth tantalate ceramic material, a high-precision prediction model of the infrared emissivity of the rare earth tantalate is innovatively developed by constructing a multi-system common data set, and rapid evaluation of the infrared spectral characteristics of the A-site high-entropy rare earth tantalate RE3TaO7 material is achieved. On the basis of the model, a multi-element rare earth tantalate system which comprises (Y < 0.2 > Dy < 0.2 > Gd < 0.2 > Sm < 0.2 > Nd < 0.2 >) < 3 > TaO7 and (Nd < 0.2 > Eu < 0.2 > Dy < 0.2 > Er < 0.2 > Yb < 0.2 >) < 3 > TaO7 and has excellent infrared radiation characteristics is successfully screened out. According to the method, the limitation of traditional small sample material research is broken through through big data modeling, and an efficient theoretical design normal form is provided for developing a novel high-entropy infrared radiation material.

The invention relates to a non-Lambert surface emissivity inversion method, belongs to the technical field of infrared optical measurement and radiation modeling, solves the technical problems of low precision and poor model stability of non-Lambert surface emissivity inversion, and comprises the following steps: measuring original radiation intensity of a non-Lambert surface of a to-be-tested material in different emergent directions; converting the original radiation intensity into directional reflectivity; on the basis of the generalized Lorentz function, diffuse reflection background items are superposed, and a physical prior model is constructed; physical constraint is carried out on the physical prior model parameters; the parameter residual network generates a parameter field, and the parameter field is input into the optimized physical prior model; and carrying out hemispherical integration, and converting the directional reflectivity into directional-hemispherical emissivity. The device and the method are used for infrared thermal imaging measurement, material radiation characteristic characterization and engineering detection in a complex environment.

The invention relates to the technical field of jet flow flame disaster-causing parameter prediction, and discloses a jet flow diffusion flame size and radiation characteristic prediction method and system based on a machine learning method. The method comprises the following steps: constructing a flame size empirical model based on experimental data characteristics; constructing a machine learning model to predict flame height, width and lifting height, and combining the empirical model as a loss function with the empirical model; mass flow is determined according to the gas parameters, and a flame dwell time and radiation fraction calculation model is established in combination with a flame width prediction model; and establishing a flame total radiation power calculation model and a radiation source weighted distribution model, and solving the radiation heat flux by combining a flame height and lifting height prediction model. The prediction method provided by the invention can be used for predicting the sizes and radiation characteristics of jet diffusion flames with different scales under various working conditions, and has the characteristics of high prediction efficiency, high prediction precision, wide application range and the like.

The invention designs a short-wave over-the-horizon communication comprehensive simulation analysis method for the problems of cascade and comprehensive analysis of antenna radiation characteristics and radio wave propagation environments. The method comprises the steps of performing radiation characteristic simulation on a short-wave antenna, constructing an ionosphere model, simulating a propagation path of a short-wave signal in an ionosphere by adopting a ray tracing technology, integrating antenna characteristics, an ionosphere environment and a propagation mechanism, and calculating falling area energy distribution of the signal. And comprehensive evaluation and analysis of the reachable range of short-wave beyond-visual-range communication are realized. According to the method, the signal propagation path and fading characteristics of the signal from the radiation source to the receiving tail end can be comprehensively mastered, and guidance and basis are provided for antenna selection, erection, coverage area analysis and communication quality estimation in practical engineering application of short-wave beyond visual range communication.

The invention discloses a method for detecting radiation characteristics of a to-be-detected target in a shallow sea waveguide environment, which comprises the following steps of: 1, extracting real normal wave modal parameters of a sound source radiation signal in the shallow sea waveguide environment through an orthogonal constraint modal search method according to data received by a vertical array; 2, according to the real normal wave modal parameters, through a normal wave expression in a waveguide environment, performing inversion to obtain a sound field of the whole shallow sea waveguide; and step 3, acquiring sound field information required in the sound field of the shallow sea waveguide, mapping the sound source information into the free space by using the reciprocity theorem, realizing sound field migration from the shallow sea waveguide to the free space, and further acquiring the radiation characteristics of the target to be measured in the free space. The method is used for obtaining the radiation characteristics of the to-be-measured target in the free space according to the data received by the vertical array.

The invention relates to a method (100) and a device for analyzing the radiation characteristics of a motor vehicle, wherein the method (100) comprises acquiring (110) vehicle characteristics of a motor vehicle, acquiring (120) radiation characteristics of at least one transmitter-receiver of the motor vehicle, evaluating (160) the vehicle characteristics and the radiation characteristics and providing (170) a reference for positioning the transmitter-receiver based on the evaluation.

The invention relates to the technical field of alloy materials, and provides a low-activation high-strength anti-radiation high-entropy alloy and a preparation method thereof. The components of the alloy are (Fe < 3 > < 0.4 > Cr < 3 > V < 3 > < 0.3 > Ti < 3.0 > Ta < 3.0 > W < 3.0 >) < 100-x > C < x >, and x is larger than or equal to 0.5 and smaller than or equal to 7. The yield strength of the high-entropy alloy at the room temperature is larger than 1300 MPa, the plastic deformation amount is 15% or above, the room-temperature brittleness is greatly relieved, and compared with an existing low-activation high-entropy alloy, the low-activation high-entropy alloy has the advantages of being high in strength and toughness, low in cost and the like. In addition, after high-energy low-flux He plasma irradiation, the anti-irradiation performance of the alloy is improved, and the mechanical performance and the irradiation performance of the material can be regulated and controlled through alloy components. The low-activation high-entropy alloy serves as a nuclear material of a fusion reactor and a new-generation fission reactor, the problems that an existing traditional low-activation nuclear material is high in cost, insufficient in mechanical property and the like are solved, and application and development of nuclear energy in the fields of aviation and national defense can be further promoted.

The invention discloses a method and system for testing electromagnetic radiation characteristics of an IGBT module for a converter valve, and the method comprises the steps: selecting an inductive load connection mode according to the position of an IGBT to be tested during testing: testing an upper IGBT, and connecting the two ends of an inductive load with a first wiring terminal and a second wiring terminal (the first wiring terminal is a neutral point between the upper IGBT and a lower IGBT) of the converter valve; and when the lower tube IGBT is tested, the first wiring terminal and the positive terminal of the bus capacitor are connected. A combined electromagnetic field probe is arranged around the IGBT to be detected, a probe shell is grounded, and a lead is connected with a signal conversion device. Firstly, a bus capacitor is charged to a stable voltage, and environmental background noise is collected by a probe when no gate pole is triggered. And pulse parameters are set by the upper computer and are sent to the driving board through the optical fiber to trigger the IGBT double-pulse action. Electric signals output by the probe are converted into optical signals through the photoelectric converter and transmitted to external equipment through the optical fiber to be restored. And subtracting background noise from a double-pulse measurement result, extracting a net radiation electromagnetic signal, and separating electromagnetic interference signals in different processes according to the switching time of the IGBT. The invention aims to accurately measure the radiation electromagnetic interference signal of the IGBT in the converter valve module in the switching-on, switching-off and diode follow current processes, and provides a basis for the electromagnetic compatibility design and shielding reinforcement of the converter valve module.

The invention belongs to the technical field of infrared signals, and discloses an infrared target full-life-cycle end-to-end detection efficiency evaluation method, which comprises the following steps of: firstly, building detection scenes such as a target, a detection platform, a load and the sun, including elements such as a target full-process motion trail, a satellite orbit and observation geometry; performing conversion from a target coordinate system to a load image coordinate in a detection scene to realize sub-pixel-level target geometric simulation; constructing a finite element three-dimensional model of the target, calculating an instantaneous equilibrium temperature field of the target, and calculating full life cycle radiation characteristics of the target according to data such as the temperature field and the projection area; obtaining an infrared target and background gray scale through an infrared load radiation response model, and forming a detection image sequence; and finally, evaluating the dynamic detection efficiency according to the target gray value of the image end and the signal-to-noise ratio of the noise. The method can comprehensively and accurately describe the dynamic process of the detection efficiency of the infrared load on the dark and weak target along with time and scene changes, and is suitable for the fields of spaceflight and aviation.

The invention discloses a power module near-field radiation characteristic simulation analysis method, and belongs to the technical field of electromagnetic compatibility. According to the method, aiming at the near-field radiation characteristic problem of the power supply module, a power supply module PCB full-wave three-dimensional numerical simulation model is built by using CST, and the near-field radiation characteristics of the power supply module PCB under different output end parameter configurations are obtained through simulation by changing the filter inductance and capacitance values of the output end of the power supply module. And the influence of different PCB grounding layer segmentation modes on the near-field radiation characteristics of the power supply module is analyzed, and a reference basis is provided for subsequent CAN node module PCB optimization.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The invention discloses an electromechanical system integrated broadband electromagnetic radiation characteristic modeling method based on cable current and electrical equipment near field test data, comprising the following steps: 1) modeling broadband radiation characteristics of each strong electromagnetic equipment of an electromechanical system, 2) modeling the wide-frequency-band radiation characteristics of interconnection cables among the strong electromagnetic devices of the electromechanical system to obtain a radiation electric field # imgabs1 # generated by the cables; 3) carrying out vector superposition on the radiation electric field # imgabs2 # generated by the strong electromagnetic devices and the radiation electric field # imgabs3 # generated by the cables to obtain a radiation electric field # imgabs2 # generated by the strong electromagnetic devices and a radiation electric field # imgabs1 # generated by the cables, and carrying out vector superposition on the radiation electric field # imgabs2 # generated by the strong electromagnetic devices and the radiation electric field # imgabs3 # generated by the cables; and 4) superposing the radiation electric field # imgabs5 # of the electromechanical system with the relative error between the radiation electric field and the test electric field to obtain a radiation electric field test value of the electromechanical system. According to the method, the system-level integrated radiation interference characteristic model of the electromechanical system can be effectively established, and the radiation field distribution of the electromechanical system in a large equipment platform can be quickly predicted.

The invention discloses an electromagnetic environment-friendly radiation protection assessment method and system, and the method comprises the steps: obtaining electromagnetic field data containing power frequency and high-frequency components through a data collection device, generating a multi-dimensional index data set and a radiation characteristic distribution diagram through the combination of exposure time and a crowd sensitivity index through a computational simulation method, and accurate quantitative analysis of the complex electromagnetic environment is realized. On the basis, a weight analysis method is adopted to fuse effect parameters to calculate a risk quantitative score, when the score exceeds a safety threshold value, radiation limit value data is automatically extracted to generate a visual risk map, and a processing module is linked to output a grading protection instruction. By activating protection configuration in the sensor network, decision unit parameters are dynamically adjusted according to real-time electromagnetic field data, and an optimized protection scheme including a dynamic strategy is formed. According to the invention, the conversion from passive protection to active early warning is realized, and the intelligent level and protection effect of electromagnetic radiation protection are significantly improved.

The invention provides a metamaterial reconfigurable dual-polarized antenna array and a dynamic beam forming method thereof. The dual-polarized antenna array is composed of a metamaterial resonance unit array, a reconfigurable polarization network, an intelligent control unit and an adaptive beam forming algorithm. The metamaterial unit structure with the dual-polarization characteristic is designed, and continuous adjustment of the polarization state and the radiation characteristic is achieved by integrating the liquid metal microchannel and the variable capacitance diode. A hierarchical control framework and a deep reinforcement learning algorithm are adopted, self-adaptive optimization control over an antenna array is achieved, and the characteristics of high-precision beam forming, quick response and high energy efficiency are provided while low system complexity is kept. Flexible regulation and control of the polarization state, high-precision beam forming, low system complexity, quick response, high energy efficiency and wide dynamic range can be realized at the same time, so that the requirement of a future communication system on a high-performance antenna is met.

The invention provides an electronic device. The electronic device comprises an antenna, an electromagnetic energy detector and a controller. The electromagnetic energy detector is located near the radiator of the antenna. The controller can adjust the current distribution on the radiator through being coupled with the electromagnetic energy detector, so that the antenna still has good radiation characteristics in a state of being held by a user.

The invention discloses a photoconductive antenna for reducing a space charge shielding effect, relates to a terahertz transmission technology, and provides a scheme for solving the problems of overhigh shielding voltage and the like in the prior art. The structure comprises a photoconductive substrate, a first electrode arranged on one side of the upper end face of the photoconductive substrate, and a second electrode arranged on the other side of the upper end face of the photoconductive substrate. A gap nano metal array is arranged between the first electrode and the second electrode; the gap nano metal array comprises unit cells which are distributed in an array; the metal sheets in the unit unit cells and / or between the unit unit cells excite local plasmon polaritons to enhance the light field intensity of corresponding areas when irradiated by incident laser. The terahertz photoconductive antenna has the advantages that the nanometer array structure is introduced, a high radiation enhancement area is generated through metal plasmon coupling, the terahertz photoconductive antenna obtains better radiation characteristics, meanwhile, the nanometer array structure is structurally optimized, the distribution condition of carriers in the photoconductive antenna is improved, and space charge shielding voltage is effectively reduced.

This invention provides a method for rapid planar near-field measurement of large-aperture antennas, relating to the field of antenna technology. The method obtains sparse field amplitude and phase information of several sampling surfaces in the near-field radiation region of the antenna under test through large-step uniform sampling. Simultaneously, it samples a finite number of precise field amplitude and phase information points for each sampling surface and obtains the field distribution characteristics by calculating the fluctuation of the amplitude at the sampling points. Based on the sparse field amplitude and phase information and field distribution characteristics of the sampling surfaces, it uses partitioned interpolation and field distribution calibration methods to obtain the initial electric field of each sampling surface. Based on planar wave spectrum theory, iterative numerical calculations are performed on the initial electric field to recover the near-field distribution of each sampling surface. Finally, the far-field radiation characteristics of the antenna are obtained through near-field-to-far-field transformation. This invention can significantly shorten the testing time while obtaining key indicators of the antenna's far-field characteristics, including the normalized radiation pattern main lobe and first sidelobe, 3dB beamwidth, sidelobe level, and axial ratio.

The invention discloses a method for designing and evaluating a spectral range of a surveying and mapping load wave band, which comprises the following steps of: firstly, transmitting configuration parameters based on radiation under an imaging condition; the entrance pupil radiation characteristic result, the load imaging performance, the image texture characteristic and the spectrum distortion characteristic of the detection wave band designed based on different spectral range parameters at the surveying and mapping load entrance pupil after atmospheric radiation transmission are calculated; and secondly, according to the obtained entrance pupil radiation characteristic result, the imaging performance parameter calculation result, the image texture characteristic parameter calculation result and the spectral distortion characteristic calculation result, evaluating the comprehensive influence of different spectral range parameters on load imaging. According to the invention, the imaging quality and the image information amount of the surveying and mapping load can be evaluated by different spectrum broadening, and the optimal configuration of the spectrum range of the load detection wave band is realized.

The embodiment of the application provides a geological exploration method and device based on the radiation characteristics of the intrinsic subatomic wave of a substance, which comprises the following steps: obtaining remote sensing satellite data by setting the specific range of a target mining area, a scale, a shooting angle, a time period and a wave band, and determining the original negative of the remote sensing satellite corresponding to the exploration area; performing radiation operation on the original negative according to a preset subatomic field generator, performing image enhancement processing on the target substance radiation image according to a nonlinear algorithm, and determining the corresponding target substance digital map; determining the corresponding three directions according to the digital map, determining the corresponding three digital images according to the three directions respectively, performing target substance inversion calculation and target substance model establishment operation according to the three digital images, and determining the corresponding target substance mathematical model to realize the visualization of the target substance. The application can capture the subatomic radiation of the crust mineral elements based on the satellite, detect and visualize the minerals by using the subatomic characteristics, and improve the efficiency and accuracy of geological exploration.

The application discloses a high-temperature and high-pressure combustion chamber spectrum characteristic transmission device based on a special optical fiber probe head, which comprises an optical fiber probe head, a light guide optical fiber, a light emitting characteristic analysis device and a cooling liquid pump; the optical fiber probe head comprises high-transmittance optical glass, a metal cooling sleeve and an optical flange; the high-transmittance optical glass can transmit ultraviolet-visible light with a wavelength of 100-760 nm; the metal cooling sleeve comprises a cylindrical sleeve and a connecting cap; the cylindrical sleeve is coaxially arranged on the outer periphery of the high-transmittance optical glass and is sealingly arranged in a probe head mounting hole; the light guide optical fiber can collect the ultraviolet-visible light transmitted through the high-transmittance optical glass and is connected with the light emitting characteristic analysis device; and the cylindrical sleeve and the connecting cap are both provided with cooling channels connected with the cooling liquid pump. The application can analyze the chemical reaction light emitting characteristics in the high-temperature and high-pressure combustion chamber in real time, is especially suitable for monitoring the spontaneous radiation characteristics of OH*, CH* and C2* groups generated in the combustion process, and thus can determine the reaction region and the reaction heat release.

To provide an antenna device capable of obtaining sufficient radiation characteristics even when arranged in a state of being close to a metal member, and a detection device.SOLUTION: The antenna device includes an annular substrate including a first surface, a second surface, and an opening penetrating between the first surface and the second surface, an annular antenna element provided on the first surface and surrounding the opening, a first feed line provided on the first surface and including a feed terminal connected to the antenna element, a second feed line provided on the second surface and including a connection terminal connected to a communication unit, the second feed line including an overlapping portion that overlaps a first portion of the first feed line in plan view, and a through hole that penetrates the substrate and connects the first feed line and the overlapping portion of the second feed line.SELECTED DRAWING: Figure 4

The invention provides a metal patch loaded miniaturized dielectric resonator antenna for a base station, and relates to the technical field of wireless communication, a specific parasitic metal patch is introduced at the bottom of a dielectric resonator, the limitation that the traditional design only depends on geometric dimension to adjust the frequency is broken through, the TM12 high-order mode frequency is obviously pulled down to be close to a fundamental mode TM10 and fusion is realized, and the antenna has the advantages of being simple in structure and convenient to use. On the premise that the size of the antenna is not increased, the working bandwidth is expanded to 3.4-4.0 GHz. Through the structural design, a cross-shaped groove structure is loaded in the central area of the dielectric resonator, a current path of a TM20 parasitic mode is cut off accurately, directional diagram distortion and cross polarization interference caused by the mode are effectively suppressed, and it is ensured that the antenna has stable radiation performance. Therefore, the antenna has excellent broadband and radiation characteristics, can still keep compact physical size, low profile structure and simple processing technology, and meets the urgent demand of a microwave frequency band wireless communication terminal on high performance and miniaturization antennas.

The utility model relates to a metal heating piece, an antenna assembly, a glass assembly and a vehicle, the metal heating piece comprises a body and a branch knot, the branch knot is connected to the body, and the metal heating piece is close to an antenna; the body can conduct electricity and generate heat, the branch knot is arranged to receive a wireless signal radiated by the antenna and can generate current, and the flowing direction of the current flowing on the branch knot is opposite to that of the current flowing on the body. According to the metal heating element, current on the body can be counteracted through the arranged branch knots, the choke effect is achieved, the influence of the metal heating element on the radiation characteristic of an antenna is reduced, the performance such as the polarization characteristic and the gain of the antenna is improved, the metal heating element can be arranged close to the antenna, the performance of the antenna cannot be affected, and the service life of the antenna is prolonged. Therefore, the arrangement position of the antenna is high in degree of freedom and more in selectivity.