974 results about "Radiation pattern" patented technology

The invention relates to the technical field of electronic information, in particular to a multi-band cooperative interference gallium nitride phased-array antenna control method and system. The method comprises the steps of extracting key parameters of electromagnetic signals, and generating a cooperative interference strategy combination; mapping the frequency band optimization weight to a dynamic working mode of the gallium nitride power amplifier unit, adjusting the radiation pattern characteristics of the reconfigurable dipole array according to the power distribution parameters, and constructing a composite beam forming framework; phase weighting and spatial multiplexing are carried out on the interference signals of all the frequency bands based on the composite beam forming architecture, and a multi-beam interference cluster is generated; thermodynamic state data of the gallium nitride power amplifier module in the multi-beam interference cluster generation process are collected in real time, and heat dissipation parameters of the liquid cooling system are regulated and controlled according to the thermodynamic state data. Intelligent collaboration and accurate pointing of multi-band interference signals are realized, the interference coverage range and the energy utilization rate are improved, and an efficient interference system integrating electromagnetic sensing, multi-beam collaboration and thermal management is formed.

The invention discloses an intelligent optimization driving electromagnetic information metasurface multi-dimensional dynamic regulation and control system, solves the problem that the function solidification of an existing metasurface is difficult to dynamically adjust, and belongs to the crossing field of electromagnetic metamaterials and intelligent control technologies. The method comprises the steps that a sensor network collects environment multi-dimensional information of a programmable metasurface unit in real time; the controller processes the environment multi-dimensional information to obtain a multi-dimensional sensing result; the multi-dimensional interaction layer inputs design parameters, the intelligent decision-making layer combines the design parameters and a multi-dimensional perception result to construct a target joint optimization model, reverse design is carried out on the super-surface array coding sequence, and a display array coding pattern and a three-dimensional radiation pattern / two-dimensional radiation pattern are obtained according to the designed super-surface array coding sequence; displaying on the multi-dimensional interaction layer; and the controller performs real-time electromagnetic response reconstruction and 1-bit or 2-bit phase modulation on the programmable metasurface unit through the field programmable gate array according to the designed metasurface array coding sequence.

The invention discloses a broadband high-gain microstrip antenna, which is provided with a rectangular radiation patch, a symmetrical grooving parasitic patch, a dielectric substrate, a metal bottom plate and a polytetrafluoroethylene support column, the rectangular radiation patch and the symmetrical grooving parasitic microstrip are attached to the upper layer of the dielectric substrate; a certain distance is formed between the rectangular radiation patch and the slotted parasitic patch and is used for coupling electromagnetic waves; the upper dielectric substrate is provided with two through holes for feeding; the metal bottom plate and the upper-layer substrate are fixed through four polytetrafluoroethylene supporting columns; a space is reserved in the middle to form an air substrate; and an SMA interface is arranged below the floor. According to the microstrip patch antenna, the forms of differential feeding and parasitic patch adding are adopted, the high gain and broadband characteristics of the microstrip patch antenna are achieved, the profile of the antenna is kept within 0.1 lambda, and the unipolar radiation pattern is achieved while high performance is guaranteed. In addition, the antenna is relatively simple in technical structure and convenient for later processing, can be used as an array unit for arraying, and meets the requirements of modern communication.

The invention discloses a reciprocity theorem-based array antenna multi-beam pattern synthesis method, which comprises the following steps of: establishing an array antenna model in electromagnetic simulation software, and extracting a radiation pattern of each antenna unit; defining the number and direction of to-be-formed beams and the gain ratio between the beams; establishing an array antenna energy transmission efficiency transfer function, calculating scattering parameters of each antenna unit of the array antenna through a reciprocal theorem and coordinate transformation, and constructing a scattering parameter matrix of a multi-antenna system; automatically adjusting parameters by using a particle swarm algorithm, and dynamically regulating and controlling the gain proportion between the beams; the optimal excitation value of each antenna unit is obtained, and a target beam is generated after actual loading. According to the invention, the multi-beam synthesis result of the array antenna is more convenient, more stable and more flexible.

An electronic device may be provided with peripheral conductive housing structures, a rear wall, a first antenna, and a second antenna. The first antenna may have a resonating element formed from the peripheral conductive housing structures. The second antenna may have a folded antenna element overlapping the first antenna. The folded element may be disposed on at least three sides of a substrate. The folded element may follow a meandering path along at least two of the sides. A first end of the folded element may be coupled to a positive feed terminal. A second end of the folded element may be shorted to a conductive chassis. The folded element may exhibit minimum peak current magnitude at a surface of the substrate facing the rear wall, minimizing electromagnetic coupling between the first and second antennas and optimizing a radiation pattern of the second antenna through the rear wall.

The invention relates to a 5G communication antenna electromagnetic compatibility enhancement method, device and equipment, and belongs to the technical field of wireless communication networks, and the method comprises the steps: collecting frequency band-space electromagnetic intensity data in real time through a distributed sensor network, and constructing a three-dimensional mapping model in combination with base station beam parameters and polarization information; interference frequency band coordinates are screened based on the model, a phase gradient compensation value is calculated by using a polarization mismatch degree, an antenna array is driven to reconstruct a radiation pattern, and polarization orthogonal nulling is formed in an interference area; the port standing-wave ratio is synchronously monitored, closed-loop optimization is triggered, the antenna weight and the polarization direction are dynamically adjusted until indexes converge, and the problems of insufficient dynamic interference suppression precision, polarization mismatch compensation lag and the like in the prior art are solved.

The invention relates to the technical field of wireless communication and sensing, and particularly discloses a holographic amplitude weighting-based two-dimensional antenna array multi-beam scanning method, which comprises the following steps of: determining the position information of each radiation unit in a two-dimensional antenna array, including calculating the interval and the arrangement mode of the units; an amplitude weighted value of each radiation unit is generated according to the target wave direction, a two-dimensional multi-beam holographic amplitude weighting technology is used, and the radiation unit amplitude weighted values are determined through the two-dimensional multi-beam holographic amplitude weighting technology; generating a corresponding binary discretization coding sequence based on the amplitude weighted value so as to control the excitation amplitude of each radiation unit; and designing a liquid crystal-based Ka-band two-dimensional holographic beam scanning leaky-wave antenna square array, and regulating and controlling a radiation pattern of a two-dimensional antenna array through the coding sequence to realize multi-beam scanning.

The invention provides a tri-polarization meter-wave antenna unit which is composed of five dielectric layers and six metal layers. Wherein the six metal layers comprise a top-layer square parasitic patch surrounded by a metal decoupling square ring, a middle square radiation patch, a bottom-layer circular patch loaded by an annular metal short circuit column, a ground plane 1, a feed strip line and a ground plane 2 in sequence from top to bottom. Wherein the lower layer is a circular patch antenna loaded with an annular metal column, and provides a monopole-like vertical polarization horizontal omnidirectional radiation pattern. In the structural design of the upper-layer horizontal polarization radiator, in order to realize the characteristic of horizontal polarization, an edge-fed square microstrip patch antenna structure is adopted, and the antenna is simple in structure, easy to realize and capable of generating two polarized orthogonal directional diagrams in the zenith direction. Meanwhile, a capacitive parasitic patch and a dielectric layer are loaded above the square microstrip patch antenna, so that the Q value can be further reduced, and double resonance points are introduced, so that the bandwidth of the antenna is further expanded.

The invention discloses a method and a system for predicting the propagation direction of a seismic wave field excited by a high-speed rail seismic source. The method comprises the following steps: simplifying the high-speed rail seismic source into vertical downward impact force of wheels on the ground; taking the Ricker wavelet as a deformation function of force, summing all wheels of the high-speed rail train to obtain a high-speed rail sub-seismic source function, and performing Fourier transform to obtain an amplitude spectrum; the method comprises the following steps: modeling uniformly arranged sleepers or piers of a high-speed rail line into a uniform linear array, exciting seismic waves at each array element in the uniform linear array, and summing seismic wave signals of each array element at a far-field receiving point to obtain an array factor; a radiation factor formula of the P wave and the S wave of the seismic wave field of the high-speed rail seismic source is obtained by combining the radiation pattern factors of the seismic P wave and the S wave excited by the single-point concentrated force; drawing a theoretical interference directional diagram of seismic waves; and establishing a model for simulation, comparing a theoretically predicted interference pattern with a simulation data wave field snapshot, and keeping the predicted direction consistent with the simulated wave field direction, thereby verifying the rationality and correctness of the proposed method.

The invention provides electronic equipment. The electronic equipment comprises an antenna. The working frequency band of the antenna comprises a satellite communication frequency band. According to the antenna, conductive parts of a frame serve as a first radiator and a second radiator. According to the antenna, the radio frequency signals with different phase differences are fed into the first radiator and the second radiator, so that directional diagrams with different maximum radiation directions can be generated, and the experience of a user in satellite communication can be improved.

The invention discloses a broadband omnidirectional conformal long-slot antenna and a wireless communication device, the antenna comprises two antenna units which are arranged up and down, and the two antenna units relatively rotate around the center at an angle of 45 degrees. Each antenna unit comprises an annular metal resonant cavity, a first annular dielectric substrate, a metal ring, a second annular dielectric substrate and a microstrip metal feeder which are sequentially arranged from inside to outside, and a circle of annular long seam is formed in the center of the metal ring. According to the antenna, the slot is used for providing low-frequency resonance points, the microstrip open-circuit line is used for providing high-frequency resonance points, the antenna achieves double working frequency bands, the working bandwidth of the antenna is greatly expanded through the design, the problem that the bandwidth of the antenna is insufficient is solved, the antenna is designed in a circular ring shape, a double-layer directional diagram compensation design method is applied, and the antenna performance is improved. Therefore, the antenna can achieve the omnidirectional radiation performance, and the problem that a traditional cavity-backed slot antenna is difficult to radiate in an omnidirectional manner is solved.

The invention discloses a beam pointing regulation antenna design method, which belongs to the technical field of antennas, and comprises the following steps: determining the number N of array elements required for forming an antenna, the array element spacing d, the excitation amplitude ratio of N array elements and the phase difference of adjacent array elements according to the beam pointing requirement, the beam width and the directional diagram requirement of a to-be-designed antenna; establishing a shovel-shaped feed metasurface antenna as an array element; establishing an antenna linear array by the N array elements according to the array element spacing d; establishing a one-to-N feed network by taking the excitation amplitude ratio of the N array elements and the phase difference of the adjacent array elements as output indexes of the feed network; and the one-to-N feed network is connected with the antenna linear array to form the beam pointing regulation and control antenna. The antenna can be compact, the influence of parasitic radiation of the feed network on the antenna beam can be suppressed, the radiation pattern of the antenna is optimized, and the antenna has high engineering application value.

An antenna structure and an electronic device are provided. The antenna structure is disposed on a carrier of the electronic device and includes a first dipole radiating element perpendicular to a plane, a second dipole radiating element connected to the first dipole radiating element, and a third dipole radiating element connected to the first dipole radiating element and the second dipole radiating element. The first dipole radiating element is configured to generate a first radiation pattern, the second dipole radiating element is configured to generate a second radiation pattern, and the third radiating element is configured to generate a third radiation pattern. The first radiation pattern is omnidirectional radiation on the plane. A polarization direction of the second radiation pattern and a polarization direction of the third radiation pattern are respectively orthogonal to a polarization direction of the first radiation pattern.

Described herein are unmanned aerial vehicles (UAVs) and antenna assemblies thereof for shaping radiation patterns in global positioning system applications. For example, an embodiment pertains to an antenna assembly onboard an aerial vehicle. The antenna assembly includes a radiating element coupled to a chassis of an aerial vehicle and positioned in parallel with the chassis, a substrate coupled to the radiating element, a ground plane coupled to the substrate, and a feed cable coupled to the radiating element through the substrate and the ground plane. The ground plane includes a center portion in parallel with the chassis and with the radiating element, and side portions positioned at an angle relative to the chassis and to the radiating element.

A far field radiation pattern is determined for a multi-element antenna array (1) comprising a plurality of antenna elements (2a, 2b) disposed in a first plane (6) using test apparatus comprising a support member (4) for holding the multi-element array (1) and a movable probe (3) having an aperture configured to be movable in a second plane (5) parallel to the first plane (6). A distance between the first plane (6) and the second plane (5) is less than a quarter of a wavelength at an operating frequency of the multi-element antenna array. The movable probe tis caused to radiate electromagnetic energy from the aperture and is moved in a determined trajectory in the second plane (5). A respective measurement of amplitude and phase of electromagnetic energy received by the multi-element antenna array is taken at each of a plurality of positions on the determined trajectory. The far field radiation pattern is determined from the respective measurements and from a pre-determined radiation pattern for at least one antenna element of the plurality of antenna elements.

A dadome with a surface varying refraction angle for phased array antennas, includes an electromagnetic wave active area which consists of a dielectric substrate and two dual-polarized meta-surfaces. The dual-polarized meta-surfaces are made of plurality of periodically arranged metallic meta-atoms with open, rotational symmetric, and non-continuous geometrical patterns. The meta-atoms overlap complementarily between the two sides of the dielectric substrate and are periodically arranged into at least two groups covering a space region the angular radiation pattern of a planar array antenna. The geometric dimensions of the meta-atoms vary within each group so that to form an electromagnetic transmissive phase gradient within that group and different from one group to another. The periodicity Δp of the meta-atoms is between λ / 4 and λ / 1.3, λ being the wavelength of an incident electromagnetic wave from a planar array antenna.

The invention provides a dual-band metasurface antenna array applied to radar imaging, which comprises at least one metasurface antenna unit arranged in an array, and the metasurface antenna unit is provided from top to bottom: a metasurface layer, the surface of which is laid with a patch group for exciting a characteristic mode, the patch group comprises a plurality of square patches which are laid in a square area and a plurality of right triangle patches which are separately arranged at the corners of the square area, and at least one gap is etched in at least one square patch; a first dielectric layer; the seamed grounding plate is etched with a drum-shaped gap; a second dielectric layer; and the feeder line layer comprises a long-strip feeder line and a T-shaped power divider arranged at the top of the long-strip feeder line, the antenna is excellent in return loss, gain, radiation pattern and the like, has relatively wide dual-frequency working bandwidth and remarkable high gain, and can meet the application requirements of wireless communication, radar systems and other high-performance signal transmission.

The invention discloses a millimeter wave polarization and directional diagram reconfigurable antenna, and belongs to the field of radio frequency front-end devices. The antenna is composed of symmetrical rectangular radiation patches, and a semicircular defect, a quarter circle defect, a rectangular branch load, an orthogonal bidirectional feed network, a T-shaped power dividing feed network, a composite beam ohmic contact type MEMS switch, a direct current bias line, a test patch bonding pad, a coplanar waveguide, a gradient matching structure, a dielectric substrate and a metal ground backboard which are located on the radiation patches. When the single-side MEMS switch on the T-shaped power dividing feed network is switched on, energy flows to the radiation unit on the side, and the leftward or rightward wave beam inclination effect can be achieved. When the MEMS on the two sides are both switched on, the radiation pattern points to the Z positive axis, no beam deflection exists, and therefore the pattern reconfigurable function in the left direction, the middle direction and the right direction can be achieved. When a switch on the orthogonal bidirectional feed network is closed, the size of the long line can realize 90-degree phase delay, and two orthogonal degenerate modes are synthesized into a circularly polarized wave to cover a complete half-power beam width.

An aerial monopulse active electronically scanned array (AESA) radar system includes a phased array of independently controllable radio frequency (RF) channels, a beamforming module, and a transmit / receive module. The beamforming module is configured to cause the phased array to produce a radiation pattern with intercardinal sidelobes oriented along a shortest axis to ground, during flight. The transmit / receive module is configured to half-duplex operation of the phased array by switching between left-hand circular polarization and right-hand circular polarization.

A vehicle antenna apparatus installed in a vehicle is provided. The vehicle antenna apparatus includes an array antenna including a plurality of antenna elements, and a processor configured to perform at least one instruction. The processor is configured to obtain, based on a sensing result of a sensor for sensing a position of a user riding in the vehicle, information about the position of the user, adjust, based on the information about the position of the user, a phase of at least one radio wave signal such that a position of a radiation pattern formed by the at least one radio wave signal output from the plurality of antenna elements and the position of the user riding in the vehicle vary from each other, and control the array antenna to output the at least one phase-adjusted radio wave signal.

Examples disclosed herein relate to a reflectarray panel for near-field wireless communication coverage area and designing the reflectarray panel. The method includes one or more following steps, including, determining a near field coverage area of the reflectarray panel, calculating a tangential reflected field on a reflectarray surface of the reflectarray panel based at least on a feed location and initial geometric parameters of the reflectarray surface, determining radiation pattern specifications with an incident beam pointed toward a center of the near field coverage area, performing a near-field pattern synthesis algorithm on an initial phase distribution of the reflectarray panel, determining a synthesized phase distribution on the reflectarray surface from a result of performing the near-field pattern synthesis algorithm, adjusting one or more geometric parameters of each reflectarray cell of the reflectarray panel to produce the synthesized phase distribution, and / or determining dimensions of the reflectarray panel for manufacturing.

An antenna system for satellite applications is provide, the antenna system comprising an antenna array and a feed structure, and the antenna array is a passive antenna array configured to have a first state and a second state, the second state being a first deployed state. The feed structure is configured to provide a linearly polarized incident field for the antenna array in the first deployed state. The antenna array comprises a plurality of array elements, and the plurality of array elements forms a polarization conversion surface configured for converting the linearly polarized incident field to a reflected / transmitted circular polarized field. The antenna array is configured so that the radiation pattern of the reflected / transmitted circular polarized field corresponds to a predetermined radiation pattern and an array element geometry and an array element position of each of the plurality array elements are configured to provide the predetermined radiation pattern.

An antenna for a phased array antenna. The antenna includes a substrate, a radiation element arranged on the substrate, and a radiation pattern shaping mechanism operable to reduce central radiation provided by the radiation element during operation.

The invention discloses an intelligent antenna array control method, system and device and a storage medium, relates to the technical field of communication, and aims to solve the problems of insufficient beam forming precision and low energy consumption ratio of a traditional antenna array. The method comprises the following steps: collecting multi-dimensional parameters of a communication environment in real time and generating a dynamic data set, wherein the dynamic data set comprises a user distribution thermodynamic diagram, a channel interference matrix and a multipath feature vector; obtaining a phase and amplitude regulation and control instruction set of each antenna unit in the antenna array based on the dynamic data set and a preset beam adjustment parameter; based on the regulation and control instruction set and the current scene features, a beam template library is called to generate a radiation pattern control signal, the current scene features comprise the geographical environment type and the user distribution density, and the radiation pattern control signal is used for indicating adjustment of the radiation power level.

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.

Methods, systems, and devices for wireless communication are described. For instance, a network entity may receive control information indicating a set of candidate geolocations within a target coverage area for the network entity. The network entity may transmit a signal that is beamformed via a set of antenna elements of an antenna array of the network entity in accordance with a set of antenna beamforming weights. The set of antenna beamforming weights may be identified based on a beam pattern performance criterion applied to a set of candidate radiation patterns of a spatial envelope model. The spatial envelope model may be based on a set of directions between the antenna array of the network entity and the set of candidate geolocations as well as a set of pathloss values associated with the set of candidate geolocations.

A microstrip antenna which includes a substrate, a ground on a second side of the substrate, a first patch on a first side of the substrate, and a second patch on the first side of the substrate. The first patch is connected to a first port. The second patch is separated from the first patch and connected to a second port. Each of the first and second patches is further formed with a plurality of shorting vias connected to the ground. The radiation patterns of each element also feature the RPD characteristic, which is promising for large-scale MIMO or array antennas.

An antenna assembly, which includes one or more radiating element arrays and at least one dielectric isolator for the one or more radiating element arrays, wherein, the dielectric isolator is configured to tune the phase of a coupling signal between the radiating elements so as to at least partially eliminate coupling interference between the radiating elements. As a result, the radiation pattern of the antenna can be improved. The present disclosure also provides a base station antenna having the antenna assembly.

The invention provides an arrival wave angle estimation method based on a zero scanning leaky-wave antenna. A rectangular waveguide is selected as a basic structure to design a periodic leaky-wave antenna only working in a-1 harmonic state; designing necessary antenna simulation parameters; a first leaky-wave antenna is designed; adjusting the gap interval p, and designing a second leaky-wave antenna; obtaining pattern functions of the first leaky-wave antenna and the second leaky-wave antenna; proper amplitude and phase parameters are selected for directional diagram synthesis, and a new directional diagram function is obtained; constructing an array guiding matrix suitable for the MUSIC algorithm; signal sources are arranged at different positions, simulation testing is carried out through MATLAB, and the incoming wave angle estimation capability of the zero-point scanning leaky-wave antenna is verified. According to the invention, a feasible technical path is provided for high-precision positioning and tracking application in future 6G mobile communication. The antenna is especially suitable for application in millimeter wave and terahertz frequency bands, such as vehicle-mounted communication, unmanned aerial vehicle platforms, military electronic countermeasures and the like.

The present application relates to the technical field of antennas, and provides a circularly polarized array antenna and a wireless communication device. The array antenna comprises: a first substrate, any antenna unit symmetrically arranged on the first substrate being a circularly polarized antenna unit; a second substrate, at least one first coupling gap being formed in any resonant cavity symmetrically arranged on the second substrate, and any first coupling gap being overlapped with a first target projection corresponding thereto; and a third substrate provided with an H-shaped junction and a port line, the H-shaped junction and the port line being communicated with each other, at least one second coupling gap being formed in the H-shaped junction, and any second target projection being located in the resonant cavity corresponding thereto. The circularly polarized array antenna provided by the present application can obtain relatively good batch consistency, has an extremely stable radiation pattern, good polarization purity and high radiation efficiency, and can achieve high-stability connection and high-efficiency transmission of mobile communications in millimeter wave bands.