355 results about "Magnetic dipole" patented technology

The present disclosure discloses a circularly polarized satellite antenna based on a magnetoelectric dipole. A floor is slotted, and an equivalent magnetoelectric dipole is excited using a grounded right-angle folded dipole, while two square parasitic patches are loaded to enhance a radiation performance, thus exciting a broadband high-gain circularly polarized radiation beam. The present disclosure utilizes the L-shaped right-angle folded dipole to simultaneously realize an ingenious combination of an electric dipole and a magnetic dipole, realizing a good circularly polarized radiation performance. At the same time, the present disclosure realizes circularly polarized radiation using a form of the magnetic dipole, which results in a stable pattern and a high gain.

The invention discloses a high-strength and high-toughness aluminum nitride ceramic and a preparation method thereof, and relates to the technical field of ceramics, a sol-gel method is adopted to coat the surface of aluminum nitride with a stable shell layer to form a core-shell structure, meanwhile, the low lattice mismatch rate of a core-shell interface is utilized to reduce thermal resistance, and toughness and thermal conductivity are both considered; according to the external magnetic field tape casting method, the magnetic dipole moment orientation principle is utilized, an external magnetic field is applied in the tape casting stage, the in-plane mechanical property is improved, and the fracture toughness is improved through the magnetism of aluminum nitride whiskers; a reinforcement is introduced to improve the mechanical property and corrosion resistance of the aluminum nitride ceramic material, multi-granularity powder is compounded, large-particle aluminum nitride powder is used as a sintering and heat-conducting framework material, and high activity provided by submicron particles is utilized to promote sintering, so that the sintering temperature of aluminum nitride can be remarkably reduced, and the performance is greatly improved; and the aluminum nitride substrate expands more application fields on a future packaging circuit.

The broadband dual-polarization magnetoelectric dipole antenna comprises a first dielectric layer and a second dielectric layer arranged below the first dielectric layer, and the first dielectric layer and the second dielectric layer are connected through a bonding layer to serve as an antenna substrate for supporting a magnetoelectric dipole unit. The magnetoelectric dipole unit comprises metal patches and magnetic dipoles, the metal patches and the magnetic dipoles are used as electric dipoles and magnetic dipoles, the magnetic dipoles penetrate through the first dielectric layer and are arranged on the lower side of the second dielectric layer, and the four metal patches are annularly and uniformly arranged on the upper side face of the first dielectric layer; the shape of the metal patch is a rectangle with semi-elliptical chamfers on two side edges of the outer edge; any metal patch is coupled with two gain patches arranged on the first dielectric layer, and the gain patches are circular. The problem that in the prior art, a magnetoelectric dipole antenna is poor in impedance bandwidth capacity, and therefore the requirement of people for the network information transmission speed cannot be met is solved.

The invention provides a magnetic target state estimation system and device, and relates to the technical field of magnetic target state estimation, and the system mainly comprises a data collection module, a magnetic field model construction module, a deep learning module and a result output module. The data acquisition module comprises a field measurement unit and a data set unit; the magnetic field model building module is used for enabling a magnetic target to be equivalent to a physical model; the physical model is a mixed model of an ellipsoid and a magnetic dipole array; the deep learning module comprises a neural network, the physical model and an optimizer; and the result output module is used for sending out the state prediction result of the magnetic target after the neural network training is completed. According to the scheme, the complex magnetic field data is efficiently fitted through the neural network, and the physical constraint is introduced into the loss function, so that the robustness is improved, and the overfitting problem in simple data fitting is avoided; the calculation time and resources can be greatly reduced; and the solution quality and stability can be improved.

The invention relates to the technical field of path planning, in particular to a path planning and optimizing system for offshore wind power mine sweeping operation, which comprises a magnetic anomaly data processing module, a target identification and classification module, a path planning and optimizing module and a path simulation verification module. According to the method, accurate magnetic field data processing and spatial correlation analysis are realized by detecting the magnetic field intensity of the operation area in real time and eliminating interference of environmental noise, abnormal points are identified through a gradient analysis method, and magnetic dipole feature extraction and physical property comparison are performed, so that the target identification accuracy is improved, the classification process is optimized, and the classification efficiency is improved. On the aspect of path planning optimization, by analyzing the spatial characteristics of the metal mine explosion device and combining real-time environment data such as the water flow speed and the wind speed, path planning is dynamically adjusted, dual optimization of cost and efficiency is achieved, and by means of the method of comprehensively considering data analysis and environment factors, the efficiency of the metal mine explosion device is improved. And the operation risk is effectively reduced, and the mine clearance operation efficiency is improved.

The invention relates to the technical field of magnetic detection, in particular to a target positioning method based on geomagnetic anomaly and an axis frequency magnetic field. Comprising the following steps: S1, preparing before entering water; s2, approaching a target; s3, target detection: when no target appears, an observation signal is composed of an environment magnetic field, and the energy value of the part is very small; once the target appears, the energy of the observation signal can be continuously and obviously increased, when the energy value is greater than a preset judgment threshold, the target point is judged as a suspected target point, and if the suspected point is continuously detected for a specified time, the existence of the target is confirmed; s4, combined positioning: under a Kalman filtering framework, enabling the target to be equivalent to a magnetic dipole and an electric dipole, and correcting a position predicted by a target state equation by combining measurement equations of the two models, thereby realizing combined positioning of the target and obtaining more accurate target position information; and S5, verifying and outputting a positioning result. The method has the advantages of improving the positioning precision, enhancing the anti-interference capability and the like.

The invention discloses a magnetic source positioning method based on a spin-exchange relaxation-free atom magnetometer, and aims to provide a high-precision brand-new solution for magnetic source positioning in a near-zero magnetic environment by performing physical modeling and least square estimation on space magnetic field distribution of a target magnetic source. The magnetometer is enabled to be simultaneously sensitive to a three-axis magnetic field, a light absorption detection method is utilized to ensure that complete three-axis magnetic field information is obtained, and the sensitivity of the three axes reaches fT / Hz1 / 2 (1fT = 10 <-15 > T) magnitude. In the positioning process, the target magnetic source is abstracted into a physical model of the magnetic dipole, and the space magnetic field information generated by the target magnetic source is obtained through the atom magnetometer, so that the long-term stability of the magnetic source positioning process and the high precision of the positioning result can be ensured in the zero magnetic environment; therefore, a high-precision magnetic positioning technical means with great potential is provided for various application scenes such as paleomagnetic sample testing and magnetic source positioning in medical research, and technical progress and application expansion in related fields are expected to be promoted.

The invention discloses a method for carrying out spatial positioning on a permanent magnet by utilizing a radiation magnetic field of the permanent magnet, which comprises the following steps of: firstly, establishing a magnetic dipole model of the permanent magnet, then determining the posture of the permanent magnet in a spatial range by utilizing a trained VIT (Vision Transform) network, and carrying out reverse optimization by utilizing a nonlinear optimization algorithm on the basis, so as to realize rapid and accurate positioning. Compared with an existing mature permanent magnet positioning technology using an LM algorithm and a reverse optimization algorithm, the method provided by the invention is more insensitive to errors of a sensor, and is effectively prevented from falling into a local optimal solution. Meanwhile, due to the fact that the difference between an optimization initial value and a true value is not large, the number of iteration times of optimization calculation is small, the optimization calculation can be completed in a short time, rapid and accurate positioning is achieved, and balance between accuracy and rapidness is achieved.

An antenna element, an antenna module, an antenna array and an electronic device. The antenna element (4) comprises electric dipoles (41), magnetic dipoles (42) and a feed unit (43). The current of the feed unit (43) is coupled to the magnetic dipoles (42), and is then directly transmitted to the electric dipoles (41) by the magnetic dipoles (42). Each pair of electric dipoles (41) comprises two first patches (411), each first patch (411) is of a closed loop structure, and the coupled current is transmitted along the contour of the first patch (411), thereby facilitating the lengthening of a transmission path of the coupled current. For the same transmission path length, the electric dipoles (41) of this structure have a smaller volume, which can reduce the volume of the antenna element (4). Each first patch (411) of the closed loop structure reduces the radiation area of an antenna to a certain extent, and reduces the coupling between antenna elements (4), so that the radiation gain of the antenna module (100) can be improved. Therefore, the antenna element (4) can improve the radiation gain of the antenna module (100) while making the antenna module (100) smaller. (FIG. 1)

The invention discloses a stomach tube tail end three-dimensional positioning method based on a high-precision permanent magnet mark and a flexible TMR array. The method comprises the following steps: disinfecting a stomach tube and a permanent magnet marker; the miniaturized permanent magnet marker is firmly installed at the front end of the stomach tube; reserving a mounting position at the front end of the stomach tube, and inserting the stomach tube into the esophagus of a patient through a nasal cavity or an oral cavity until the stomach tube reaches a preset position; flexible TMR sensor arrays in double-sided distribution are arranged in the chest area and the back area of the patient; according to magnetic field data detected by a TMR sensor array, coordinates of a permanent magnet marker in a sensor coordinate system are solved through magnetic dipole modeling and nonlinear optimization, a thoracic coordinate system transformation matrix is established, and three-dimensional position coordinates of the permanent magnet marker in a world coordinate system are determined; a magnetic dipole reverse solution positioning method is adopted, and meanwhile, the zero radiation exposure risk is ensured; spatial registration with an ultrasonic image is supported, and the positioning precision and the anti-interference capability are improved.

The invention belongs to the technical field of magnetization field customization, and particularly provides a method for inducing a magnetization field in any direction to a super diffraction limit. According to the invention, only a radiation field of one magnetic dipole antenna is utilized, and a first-order corresponding spatial spiral phase is superposed on the radiation field, so that an analytical expression of a vector light field at an entrance pupil plane of the optical tight focusing system can be reversely obtained; quantitatively evaluating a tight focusing field of a vector light field by adopting a Debyy vector diffraction integral theory, and evaluating characteristics of a target magnetization field induced by the tight focusing field in a magnetic material based on an inverse Faraday effect; according to the method disclosed by the invention, a complicated optimization process is not needed, the pure transverse circular polarization near-diffraction limit focal spot is constructed, the super-diffraction limit magnetizing field capable of specifying the spatial orientation is induced, and the focal field customized by the method and the induced magnetizing field have wide application prospects in the fields of optical tweezers, optical processing, all-optomagnetic storage and the like.

The invention discloses a cilia type magnetic tactile perception method for distributed force load. The size and direction of the distributed force load are calculated based on magnetic field distribution around magnetic cilia by using a force-magnetic coupling model; the magnetic cilia is composed of a flexible non-magnetic material segment and a flexible magnetic material segment, the flexible non-magnetic material end is fixed to the substrate, and the flexible magnetic material end is a free end; discretizing the magnetic cilia into a plurality of sections, wherein each section is regarded as a combined fragment of a plurality of magnetic dipoles; for any combined segment, superposing the magnetic fields of all the magnetic dipoles in the combined segment to obtain the magnetic field of the combined segment based on the superposing property of the magnetic fields; and the overall space magnetic field distribution of the magnetic cilia is obtained by superposing the magnetic fields of all the combined fragments based on the superposing property of the magnetic fields. The method has the advantages of high sensitivity, simple structure, strong anti-interference capability and the like, and is suitable for the fields of robot touch, medical micro-force detection, industrial precision measurement and the like.

The invention discloses a BiLSTM-based while-drilling electromagnetic wave logging data rapid inversion method and system, and the method achieves the efficient processing of logging data through constructing a deep network structure composed of four BiLSTM layers and a full-connection layer. According to the method, ideal magnetic dipole response is adopted as training data, and the problem that local minimum is likely to occur in traditional data interpretation is solved. And the recurrent dropout technology is utilized to reduce overfitting, so that the generalization ability of the model is improved. The technology not only can accurately classify the stratum model, but also can predict various stratum parameters, so that the accuracy and processing speed of data interpretation are remarkably improved, and powerful technical support is provided for geological exploration and stratum evaluation.

The invention discloses a cilia type magnetic tactile perception method for concentrated force load. The size and direction of the concentrated force load are calculated based on magnetic field distribution around magnetic cilia by using a force-magnetic coupling model; the magnetic cilia is composed of a flexible non-magnetic material segment and a flexible magnetic material segment, the flexible non-magnetic material end is fixed to the substrate, and the flexible magnetic material end is a free end; discretizing the magnetic cilia into a plurality of sections, wherein each section is regarded as a magnetic dipole fragment; the overall space magnetic field distribution of the magnetic cilia is obtained by superposing the magnetic fields of all the magnetic dipole segments based on the superposing performance of the magnetic fields. The method has the advantages of high sensitivity, simple structure, strong anti-interference capability and the like, and is suitable for the fields of robot touch, medical micro-force detection, industrial precision measurement and the like.

The invention provides a wear coefficient correction method for a shield cutter, and relates to the technical field of wear monitoring, and the method comprises the steps: collecting a time sequence magnetic field signal obtained by a magnetic sensor array disposed on a non-rotating part of a shield tunneling machine, and synchronously obtaining a cutter angle coding signal; performing time-frequency conversion and filtering on the magnetic field signal to obtain a noise reduction time sequence signal; determining a geometric position sequence of each shield cutter in combination with the angle coding signals; based on the magnetic sensor pose, the tool position and the magnetic dipole model, theoretical magnetic field mapping between the tool and the sensor is constructed, and a system response matrix is generated; reconstructing an independent magnetic feature vector of each cutter to obtain an optimal feature set; generating a vector difference through comparison with a reference vector, inputting the vector difference into an abrasion identification model, obtaining the abrasion loss and type identification of each cutter, and correcting an abrasion coefficient; the method improves the wear recognition precision and reliability, and is suitable for tunnel construction under complex geological conditions.

The invention provides a multi-magnetic accurate positioning method based on APSO-LM fusion, and solves the technical contradictions that global search and local convergence are unbalanced and the resolving efficiency is low in the existing multi-magnetic accurate positioning technology. The method comprises the following steps: constructing a magnetic moment calibration module, selecting a sensor array calibration point, collecting magnetic field data, and calculating a precise magnetic moment amplitude based on a magnetic dipole model; an NSS-VMGT initial positioning result is input through a parameter initialization module, APSO and LM algorithm parameters are configured, and particle vectors are normalized; generating a particle swarm by using an APSO global search module, and iteratively screening a global optimal parameter as an LM initial value; calculating a residual error and a Jacobian matrix by means of an LM local refining module, and iteratively optimizing and outputting a magnetic source position and a magnetic moment; and the dynamic compensation module is used for calibrating clock skew and inhibiting environment interference. The device is realized based on STM32H743, and comprises a 7 * 7 lis2mdltr sensor array, a dual-chip data acquisition link, an APSO-LM algorithm hardware acceleration module and an upper computer interaction unit.

The invention belongs to the technical field related to nanometer material testing, and discloses a magnetic nanoparticle relaxation time detection method and an environmental parameter detection method, and the method comprises the following steps: applying an excitation magnetic field around a to-be-detected target mixed with magnetic nanoparticles; obtaining magnetization response generated by the magnetic nanoparticles in any direction of the magnetic field plane, and obtaining phase lag corresponding to any order harmonic term of the magnetization response; according to the function relationship between the phase lag corresponding to any harmonic term and the Brown relaxation time of the magnetic nanoparticles, solving and obtaining the Brown relaxation time of the magnetic nanoparticles; wherein the function relationship comprises a correction term introduced by magnetic dipole interaction of the magnetic nanoparticles. The magnetic dipole interaction among the magnetic nanoparticles is introduced, relaxation time detection of particle space distribution under an external magnetic field is corrected, the interference of the magnetic dipole interaction on the magnetic nanoparticle Brown relaxation time detection process can be effectively reduced, and accurate estimation of the magnetic nanoparticle Brown relaxation time is realized.

The invention discloses a broadband circularly polarized magnetoelectric dipole antenna with superposed Ka-band radiation modes, and belongs to the field of radio frequency front-end devices. The antenna is composed of an electric dipole patch composed of a rectangular patch and a stepped patch, a magnetic dipole radiator composed of four metal columns, an H-shaped slotted coupling floor, a feeder line, coaxial feed metal columns, an SIW structure, a metal ground backboard, an upper dielectric substrate, a lower dielectric substrate and a pp bonding layer, an antenna unit is subjected to 4 * 4 arraying, and the circularly polarized radiation performance of the antenna unit is verified. According to the invention, the circularly polarized wave beam range is wide, and the axial ratio bandwidth is 3GHz to cover the complete working frequency band. After the array is formed, the active S parameters of the array elements are well matched, and the excellent axial ratio performance is still achieved during beam scanning.

The invention relates to a radio frequency coil design method for transmitting array space coding imaging, and belongs to the technical field of magnetic resonance imaging. Aiming at the problems of low single-dimensional coding efficiency, strong coupling interference among coils and nonlinear phase gradient in the traditional TRASE technology, axial and radial coding coils are designed based on a target field method and a magnetic dipole method, two-dimensional radio frequency phase coding is realized through reverse current solenoid decoupling combination, and excitation and signal receiving are realized in combination with a saddle-shaped coil. According to the technical scheme, by optimizing the coil structure and the decoupling design, multi-dimensional efficient coding, high-precision phase gradient, strong anti-interference and light system weight are achieved, and the method is suitable for portable and dynamic monitoring scenes of low-field magnetic resonance.

An orthogonal twinning method and apparatus for an oil and gas pipeline crack signal, and a storage medium. The method comprises: acquiring a triaxial magnetic flux leakage measurement signal modulus of an inner wall crack or outer wall crack under unidirectional direct current excitation conditions, and acquiring a dynamic magnetic signal or eddy current signal under dynamic magnetic field excitation conditions orthogonal to the direct current excitation; inputting the triaxial magnetic flux leakage measurement signal modulus into a crack signal orthogonal twinning model, and obtaining a magnetic flux leakage enhancement estimation signal; extracting a crack scale initial value from the magnetic flux leakage enhancement estimation signal and a 0-1 binarized signal thereof, and substituting the crack scale initial value into a magnetic dipole model of the inner wall crack or outer wall crack to iteratively calculate an optimal scale intermediate variable; and optionally, under the excitation of virtual orthogonal twinning direct current excitation, using the optimal scale intermediate variable as an input, and, by means of "dynamic magnetic or eddy current signal mapping", outputting a twin dynamic magnetic or eddy current response signal.

The invention provides an indoor local magnetic field modeling method and device based on a magnetic source equivalence principle, and belongs to the technical field of indoor localization, and the method comprises the steps: collecting the data of a three-axis magnetometer in a space range through an array type magnetic sensor, and obtaining the original measurement information of an indoor magnetic field; based on a magnetic source equivalence principle, an indoor magnetic field is modeled into an equivalent magnetic dipole model consisting of a plurality of equivalent magnetic dipoles, and a magnetic field generated by the model is consistent with a real magnetic field in an observation area by setting magnetic moment and position parameters of the magnetic dipoles; according to the measured value of the array type magnetic sensor, an observation model is established in combination with an equivalent magnetic dipole model and used for describing the relation between the measured value and model parameters; through a nonlinear least square optimization method, parameters of the equivalent magnetic dipole model are solved according to the observation model, the equivalent magnetic dipole model of the indoor magnetic field is obtained, and the parameters comprise the magnetic moment and the position of the magnetic dipole. The precision and the reliability of the model are remarkably improved.

The invention provides a single-target permanent magnet positioning method and device based on a magnetic dipole model, and relates to the technical field of magnetic sensing, and the single-target permanent magnet positioning method based on the magnetic dipole model comprises the steps: generating a uniform magnetic field through a Helmholtz coil, and measuring the magnetic moment data of a to-be-measured magnetic dipole; the magnetic dipole to be tested is a cylindrical permanent magnet; the MSSA algorithm used for short-distance positioning and the ICNN-GRU-Attention neural network algorithm used for long-distance positioning are fused, and a fusion positioning algorithm is obtained; and inputting the magnetic moment data and magnetic field intensity data received by using a sensor array into the fusion positioning algorithm, and determining a target position of the magnetic dipole to be measured. According to the method, the positioning area is divided into the close-distance area, the mixed area and the long-distance area, and the positioning algorithms in different application ranges are fused to generate the adaptive fusion algorithm, so that the positioning precision of the single-target permanent magnet is improved.

A magnetic alignment assembly can be incorporated into an electronic device to facilitate alignment with another device. The magnetic alignment assembly can include a main magnet (e.g., a square or rectangular magnet) having a magnetic dipole in an axial direction and a ring magnet coaxial with the main magnet. The ring magnet can be smaller than the main magnet. The ring magnet can be positioned between the main magnet and an interface surface.

The invention discloses a magnetic field calculation method and device for a magnetic dipole and a storage medium, and relates to the technical field of magnetic field calculation, and the method comprises the steps: calculating a model of first magnetic induction intensity at the center of the magnetic dipole, a model of target magnetic induction intensity at a target point, and a model of second magnetic induction intensity at the center of the magnetic dipole; polynomial fitting is carried out on the change relation between the target point and the first position vector of the target point relative to the center of the magnetic dipole to obtain a first relation function; determining a model of the target magnetic induction intensity at the target point according to the first relation function; polynomial fitting is carried out on the change relation between a second position vector corresponding to the second magnetic induction intensity and the vector direction of the second position vector, and a second relation function is obtained; determining the target direction of the vector of the magnetic induction intensity of the target point according to the second relation function; and determining the target magnetic induction intensity of the target point according to the model of the target magnetic induction intensity and the target direction. According to the invention, the magnetic induction intensity of the magnetic dipole can be accurately calculated.

The invention discloses a dual-polarization filtering integrated antenna and a manufacturing method, and relates to the technical field of communication, the dual-polarization filtering integrated antenna comprises an antenna assembly and a filtering assembly, the antenna assembly comprises a substrate, a grounding plate and two groups of radiation units, the grounding plate is arranged at the first end of the substrate, and the filtering assembly is arranged at the second end of the substrate; each radiation unit comprises an electric dipole, a magnetic dipole and a feed part, the magnetic dipole comprises two single walls, each single wall comprises a plurality of metal columns, the feed part is arranged at the second end of the substrate, the electric dipole is arranged in the horizontal direction and located between the first end and the second end, and the metal columns are arranged at intervals and form an electromagnetic shielding cavity; the filtering assembly is arranged between the electric dipole and the first end and is positioned in the electromagnetic shielding cavity; the filtering assembly comprises a filter, a vertical transmission line and an improved structure; the filter comprises a plurality of capacitors and inductors; according to the technical scheme provided by the invention, the limitation of contradiction between the structural integration level and the electromagnetic performance in the conventional filtering antenna design can be broken through.

A single-layer broadband vertically polarized endfire magnetoelectric dipole (ME-dipole) antenna and an antenna array. The main radiator of this antenna is a substrate-integrated closed loop, which consists of two horizontal metallic strips printed on the upper and lower surfaces of substrate and a pair of vertical metallic vias. Excited by a double-sided parallel-strip line at the center of the loop, the metallic vias function as electric dipoles while the entire loop aperture works as magnetic dipole. To facilitate integration, this magnetoelectric dipole loop antenna is fed by an open-ended substrate integrated waveguide (SIW), which also works as a backed cavity to enhance the front-to-back ratio. Moreover, rectangular slots are etched at the edges of the SIW aperture to further improve the front-to-back ratio and also the cross-polarization performance. Thus, a vertically polarized endfire ME-dipole loop antenna with a low-profile structure, broad bandwidth, and stable radiation performance is achieved.

The invention discloses a two-dimensional motion trail tracking device based on permanent magnet positioning. The two-dimensional motion trail tracking device comprises an induction positioning plate, a signal acquisition module, a data transmission interface, a position calculation module and a display device, a three-axis magnetic sensor array is arranged on an induction positioning plate, magnetic field changes during movement of a permanent magnet are collected in real time, the three-dimensional position of the permanent magnet is inversed in combination with a magnetic dipole model, and the positioning precision is improved through an adaptive weighted fusion algorithm for multi-point position estimation. The signals are transmitted to display equipment after being processed, so that real-time drawing and physical quantity analysis of a motion track are realized; the permanent magnet serves as a passive projectile, power supply is not needed, and trajectory tracking of various motion modes such as horizontal projectile, free falling and simple pendulum can be achieved by matching with an optional auxiliary module. Through the synergistic effect of the passive permanent magnet and the magnetic sensor array, maintenance-free and high-precision real-time tracking and visual analysis of a two-dimensional motion track in a middle school physical experiment are realized.

The embodiments of the present application provide an antenna assembly and an electronic device, which are intended to avoid reducing the influence of the metal plate on the radiation pattern and efficiency of the antenna structure, and to generate horizontally polarized radiation by equivalent magnetic dipole. In the antenna assembly provided in the embodiments of the present application, the metal plate and the antenna structure are arranged on the same side of the circuit board, and the metal plate and the antenna structure are an integrated structure. The metal plate is used to achieve heat dissipation of the antenna assembly. The metal plate and the antenna structure are arranged adjacent to each other in a direction parallel to the circuit board. The antenna structure is located inside the circuit board. While the metal plate can achieve heat dissipation of the antenna structure, the antenna structure can also be exposed, reducing the influence of the metal plate on the radiation pattern and efficiency of the antenna structure, thereby improving the radiation pattern and efficiency of the antenna structure and the metal plate. The electronic device provided in the embodiments of the present application can realize two-way communication between the user equipment and the communication system, thereby realizing fiber to the room (Fiber To The Room, referred to as FTTR).

The present disclosure relates to communications technologies, and provides a single polarized ME dipole and a basic radiator of a phased array antenna for millimeter wave or above frequency band. The radiator is an “array of the ME dipoles” with higher dielectric constant, and can be manufactured with the multilayer PCB or LTCC process. The ME dipole comprises an electric dipole made by two parts of a first metal sheet located on a top substrate layer, a magnetic dipole made by first vias connected to the first metal sheet and a third metal sheet located on a bottom substrate layer, a balun made by an other part of the first metal sheet and a third via, and a reflecting part made by a part of the third metal sheet. The substrate layers are stacked in a multilayer structure to facilitate arranging the metal sheets and the vias.

The invention discloses a mid-infrared multi-peak narrow-band high-quality factor metasurface filter and a method. The filter comprises a dielectric layer; the metasurface is arranged on the dielectric layer and comprises a plurality of semiconductor structures which are arranged periodically, and each semiconductor structure is composed of a plurality of cuboids with different sizes; according to the metasurface, under vertical incidence of electromagnetic waves in a TE polarization mode, the electromagnetic waves generate multiple electromagnetic resonance modes in the semiconductor structure, so that the filtering effect is achieved; wherein the multiple electromagnetic resonance modes comprise electric dipole resonance, magnetic dipole resonance, multi-dipole resonance or Fano resonance. According to the invention, the red shift or blue shift of the filtering frequency is carried out by adjusting the geometric dimension parameters of the semiconductor structure, so that the filtering effect with a multi-peak high-quality factor is realized, and the excellent narrow-band filtering and gas detection functions are realized. The method can be widely applied to the field of special gas sensor design.