46 results about "Antenna radiation patterns" patented technology

The technology described herein is directed towards a multiband unit cell that is part of a reflective surface that can reflect different specific frequencies of impinging electromagnetic waves. The unit cells can have different phase profiles to facilitate beam steering and / or beam splitting functionality, independently for each specific frequency. The multiband unit cell can be a dual-band unit cell based on a straightforward unit-cell design, e.g., using diagonally arranged ring resonators as sub-cells of a supercell. Alternative design variations are also described to accommodate multi-frequency (greater than two frequency) applications. In one example implementation, the metasurface is constructed as a low-profile dual-band reflective surface with beam-steering and / or beam-splitting capabilities, e.g., utilizing only a single unit cell metal layer above a substrate. This enables precise control and manipulation of an antenna's radiation pattern, providing enhanced coverage for both frequency bands while keeping the fabrication / manufacturing costs relatively low.

An efficient synthesis method for a radiation pattern of a conformal array antenna is provided. The method includes: step 1, establishing a field analysis model of the conformal array antenna; determining an aperture field distribution principle suitable for the conformal array antenna, and expanding distribution of an excitation I of an arbitrary curved surface source in a spherical coordinate system according to the aperture field distribution principle; and step 3, establishing an optimization model for the radiation pattern of the conformal array antenna, and performing synthesis of the radiation pattern of the conformal array antenna according to the optimization model. The method greatly improves the synthesis efficiency of a radiation pattern of a conformal array antenna while ensuring that the directional pattern requirements are met.

A radio frequency uncrewed aerial system (RF-UAS) able to conduct in-flight power measurements in the far-field region of operational antennas, such as radar antennas, by employing a unique 3-axis gimbal control strategy to maintain continuous polarization alignment with the device under test, such as an antenna system. This RF-UAS system avoids distortions typically caused by RF probe misalignment and effectively utilizes the full dynamic range of an onboard RF transceiver. In at least one embodiment, the disclosed RF-UAS is used to capture co-polar and cross-polar radiation patterns of a weather radar such as an X-band weather radar or PAR. The disclosed dynamic gimbal scan algorithm accurately measures the antenna radiation pattern of the antenna under test (AUT) without needing subsequent (posterior) probe correction.

The invention relates to the field of large-spacing array antenna design optimization, in particular to a low-sidelobe large-spacing array antenna amplitude and phase design optimization method. Amplitude and phase values are randomly distributed for each large-spacing array element, the variation ranges of the amplitude and phase values are set, and a series of large-spacing array antenna radiation patterns with different characteristics can be generated through the random amplitude and phase combination, so that the large-spacing array antenna radiation pattern is more uniform in radiation. The rich radiation pattern data form a training data set of a neural network model, then the neural network model is trained through the obtained data set, and after training is completed, the radiation pattern of the large-spacing array antenna with the sidelobe level lower than-20dB is input into the trained neural network model, so that the radiation pattern of the large-spacing array antenna with the sidelobe level lower than-20dB is obtained. And outputting the optimized amplitude and phase distribution by the neural network model. The method is suitable for optimizing the design of the large-spacing array antenna.

A radio frequency uncrewed aerial system (RF-UAS) able to conduct in-flight power measurements in the far-field region of operational antennas, such as radar antennas, by employing a unique 3-axis gimbal control strategy to maintain continuous polarization alignment with the device under test, such as an antenna system. This RF-UAS system avoids distortions typically caused by RF probe misalignment and effectively utilizes the full dynamic range of an onboard RF transceiver. In at least one embodiment, the disclosed RF-UAS is used to capture co-polar and cross-polar radiation patterns of a weather radar such as an X-band weather radar or PAR. The disclosed dynamic gimbal scan algorithm accurately measures the antenna radiation pattern of the antenna under test (AUT) without needing subsequent (posterior) probe correction.

The low-profile vehicle-mounted antenna comprises a PCB monopole antenna, the PCB monopole antenna comprises a board body, antenna radiation patterns are arranged on the front face and the back face of the board body respectively, the board body directly feeds through a cable, and a printing grounding structure is arranged on the board body, forms electromagnetic coupling with the cable and is used for expanding the bandwidth of the antenna. According to the low-profile vehicle-mounted antenna, the antenna radiation patterns are arranged on the two sides of the plate body respectively, so that a low-profile flat structure is achieved, and the height of the antenna is reduced. And meanwhile, by reasonably utilizing the coupling effect of the cable and the printed grounding structure on the radiation patch, the bandwidth of the antenna is expanded, and the full-band stable performance is realized. And direct feeding is realized through the cable without an additional and complex feed network, so that the effects of simplifying the structure and reducing the cost are achieved.

The invention discloses a dual-polarization Fabry-Perot antenna with a partial reflection coating layer. The dual-polarization Fabry-Perot antenna comprises a partial reflection coating layer structure, a switch insertion piece and a feed source antenna structure, the partial reflection coating layer structure comprises a first dielectric substrate, a container and a metal patch, an air cavity is arranged between the first dielectric substrate and the feed source antenna structure, a cut-off position is arranged on the feed source antenna structure, a plurality of water injection channels are arranged on the container array, any water injection channel is connected with a plurality of small units which can be independently controlled, and any small unit is provided with a switch insertion piece. The diode is added at the cut-off position of the metal feeder line, the working polarization of the antenna is switched by adjusting the conduction state of the diode, water is injected into the specific area of the partial reflection coating layer to realize phase distribution adjustment, and non-uniform phase distribution is introduced, so that the beam of the antenna is deflected, and beam inclination is generated; the reconfigurable radiation pattern is achieved, and the current situation that a traditional resonant cavity antenna is single in radiation pattern and few in working scene can be effectively solved.

This document describes a waveguide with radiation slots and parasitic elements for asymmetrical coverage. An apparatus may include a waveguide for providing asymmetrical coverage in an azimuth plane. The waveguide includes a hollow channel containing a dielectric and an array of radiation slots through a surface that is operably connected with the dielectric. The waveguide includes an array of parasitic elements positioned on or in the surface and offset from a longitudinal side of the array of radiation slots. The radiation slots and parasitic elements configure the described waveguide to focus an antenna radiation pattern that provides an asymmetrical coverage to focus on a particular portion within the antenna field-of-view.

The invention provides a wide-angle scanning dielectric resonator array antenna based on parasitic ring structures. The wide-angle scanning dielectric resonator array antenna comprises N rectangular dielectric resonators, 2N fence-shaped parasitic ring structures, N feed gaps, N feed microstrip lines, a floor, N input ports, a first dielectric plate, a second dielectric plate and a third dielectric plate. The rectangular dielectric resonator of the main radiator is of an axisymmetric structure, the parasitic ring structure and the feed network on the lower layer of the floor are also in axisymmetric distribution, and the structure can ensure the symmetry of an antenna radiation pattern and the stability of the phase center of the antenna radiation pattern; the fence-shaped parasitic ring structure contributes radiation energy in a low elevation angle direction and is complementary with a rectangular dielectric resonator antenna with a zenith radiation characteristic, and the unit beam width is expanded, so that the array antenna obtains a wide-angle scanning characteristic; the antenna has the advantages of compact and simple structure, wide-angle scanning, low cross polarization, high radiation efficiency, stable gain and directional diagram and the like.

The application discloses a satellite-borne wide-beam circularly polarized antenna with beam equalization and a satellite, and relates to the technical field of antennas.The antenna comprises a conical horn body, a partition type circular polarizer, a feeding port and an insulating base which are sequentially connected.The conical horn body is a conical structure with an umbrella-shaped metal radiation director, and the asymmetry of the traditional horn antenna directional diagram is effectively solved through multi-mode excitation of the circular polarizer, so that the beam equalization characteristic is realized.The loaded dielectric material is polytetrafluoroethylene, the mouth surface radius of the horn is equivalently reduced through dielectric loading, and the directional diagram beam width is widened.The partition type circular polarizer is adopted to realize good circular polarization effect.Through the joint action of the base and the umbrella-shaped metal radiation director, the interference of the antenna mounting surface on the wide-beam antenna radiation diagram is reduced, the requirement of the antenna on the mounting environment is lowered, the wide-beam circularly polarized radiation and reception of the antenna can be effectively realized, and the antenna has the advantages of wide beam, beam equalization and low axial ratio.

The invention relates to a novel antenna pattern three-dimensional interaction analysis control. The control comprises a data loading module, a model creating module, a rendering control module, a coordinate system conversion module, a section analysis module, a query labeling module and a data exporting module. The method is realized by adopting Qt 5.15. 2 and VTK 8.2 architectures, antenna test data are converted into a three-dimensional model through a VTK visual pipeline flow, and dynamic section analysis under a Cartesian coordinate system, a cylindrical coordinate system and a polar coordinate system is supported. A user can input coordinates or obtain any tangent plane contour through mouse interaction, AZ plane, EL plane and contour surface projection can be displayed in real time, and the functions of spatial point data query and main lobe labeling are achieved. Self-adaptive adjustment of the interface style is achieved through the QSS style file, the QSS style file is packaged into a DLL file, and an API interface is provided. According to the method, the problems of non-uniform interface style and lack of a three-dimensional model section interactive analysis function of existing commercial software are solved, and the antenna pattern analysis efficiency is improved.

A system for providing vehicle environment awareness, comprising: two mm-wave radar sensor modules, each having a 180-degree operating field, the operating field defined by a 6 dB drop in the antenna radiation pattern, having identical hardware components and the same respective hardware arrangement within said mm-wave sensor modules, and having access to a display portion via the vehicle's communications network, the display portion positioned in the driver's field of view; wherein each of said mm-wave radar sensor modules is positioned at the rear corners of the vehicle, the rear side of the vehicle being defined as opposite the main direction of travel; wherein the radiation pattern in the elevation plane of said mm-wave radar sensor modules has a maximum radiation in the horizontal plane parallel to the ground plane;wherein the radiation pattern in the azimuth plane of said mm-wave radar sensor modules has a maximum radiation in the plane perpendicular to the back surfaces of said mm-wave radar sensor modules; wherein the back surface of said mm-wave radar sensor forms an angle greater than 60 degrees with the back surface of said mm-wave radar sensor module; wherein at least one of said mm-wave radar sensor modules has digital processing hardware functionality that performs classification of objects detected by said mm-wave radar sensor modules using radar sensor point cloud data previously generated by another functionality within said mm-wave radar sensor modules;wherein at least one of said mm-wave radar sensor modules transmits classification information about said objects around the vehicle, the object distances to the vehicle, the relative object positions to the vehicle, and the relative speed of the vehicles; the basic classification categories being: passenger vehicles, large commercial vehicles with a length not exceeding 10 meters, and motorcycles; wherein classification information is physically transmitted from at least one of said mm-wave radar sensor modules via a 4-pin connector;wherein said display part positioned in the driver's field of view uses said classification information and displays dynamic positions of said objects, the objects being represented by artificial images related to said basic classification categories, the total view coverage in the azimuth plane being greater than 300 degrees;

The invention discloses a satellite-borne wide-beam circularly polarized antenna with equalized beams and a satellite, and relates to the technical field of antennae, the antenna comprises a conical horn body, a partition plate type circular polarizer, a feed port and an insulating base which are connected in sequence; the conical horn body is of a conical structure with an umbrella-shaped metal radiation director, the asymmetry of a traditional horn antenna directional diagram is effectively solved through multi-mode excitation of the circular polarizer, and the wave beam equalization characteristic is achieved; the loaded dielectric material is polytetrafluoroethylene, the aperture radius of the horn is equivalently reduced through dielectric loading, and the beam width of a directional diagram is broadened; a partition plate circular polarizer is adopted, so that a good circular polarization effect is achieved; through the combined action of the base lifting antenna and the umbrella-shaped metal radiation director, the interference of an antenna mounting surface on a wide-beam antenna radiation pattern is reduced, the requirement of the antenna on a mounting environment is reduced, wide-beam circular polarization radiation and receiving of the antenna can be effectively realized, and the antenna has the advantages of wide beam, beam equalization and low axial ratio.

A wireless signal apparatus and a wireless signal detection are provided. The wireless signal apparatus comprises an antenna apparatus. The antenna apparatus comprises a transmitting antenna array and a receiving antenna array arranged in a first plane. The antenna apparatus forms a narrow-beamwidth antenna radiation pattern, the narrow-beamwidth antenna radiation pattern forms a flattened detection area, and the flattened detection area forms a second plane substantially perpendicular to the first plane. The wireless signal apparatus is configured to detect spatial information of an external object within the flattened detection area, and the spatial information comprises only two-dimensional spatial information in the second plane.

A test apparatus (14) for testing an antenna under test (16) has a measurement device (26), a turntable (24) and at least one stationary probe antenna (28). The measurement device (26) is a multi-channel measurement device, wherein the turntable (24) comprises a first portion (36), a second portion (38), a first rotatable RF joint (44) and a holding section (34), wherein the second portion (38) is attached rotatably to the first portion (36), and the first rotatable RF joint (44) provides a rotatable RF path between the first portion (36) and the second portion (38). The measurement device (26) and the holding section (34) are arranged spatially fixed with respect to each other at the second portion (38) of the turntable (24), and wherein the at least one stationary probe antenna (28) is electrically connected to the measurement device (26) for transmission of RF signals via the first rotatable RF joint (44). Further, a test setup (10) and a method are provided.

This invention provides a near-field array antenna pattern generation method and system based on convex optimization, belonging to the field of array antenna design technology. In a computer-aided design environment, the near-field target region is discretized into an observation network, and the array feeding system is abstracted into a feeding network composed of nodes and cables. A deterministic field strength mapping relationship is established between the two, and the main lobe and sidelobe requirements of the target pattern are transformed into upper and lower bound constraints on the field strength amplitude at the observation points. With the goal of minimizing the implementation complexity of the feeding network and the condition of satisfying all field strength constraints, the physical interconnections and cable parameters of the network are expressed as topological parameters. A convex optimization problem is constructed and solved to obtain the optimal topological parameters. Finally, detailed construction drawings of the feeding network are automatically generated based on these parameters, and electromagnetic simulation is used to verify whether the actual field strength meets the preset constraints, thereby completing the integrated design from performance indicators to manufacturing hardware solutions.

According to the omnidirectional circularly polarized antenna, the oscillator arms are of a spiral structure, so that under the condition that the heights of the antennas are the same, compared with linear oscillator arms, the oscillator arms are longer in current path and have good standing-wave ratio characteristics and gain characteristics; due to the fact that the multiple oscillator arms on the same layer are arranged in the circumferential array mode, and the spiral directions of the oscillator arms on different layers are opposite, the omnidirectional circularly-polarized antenna has the excellent omnidirectional performance and the stable radiation characteristic. Due to the arrangement of the short-circuit sleeve, the influence of induction current on the feed cable on an antenna radiation pattern can be effectively reduced, the original pattern can be preserved to the greatest extent, and the antenna has higher gain and more stable radiation performance; in general, the omni-directional circularly polarized antenna is not easily influenced by cable induction current, and shape preservation and distortion reduction can be performed on a directional diagram to the greatest extent while the characteristics of high gain and high axial ratio are maintained, so that the communication quality is improved.

It is determined that a request has been received to make a change in a radiation pattern of an antenna coupled to a Citizens Broadband Radio Service Device (CBSD) from a first radiation pattern to a second radiation pattern. A registration object associated with the CBSD maintained by a spectrum access system (SAS) is obtained. A new radiation pattern characteristic of the second radiation pattern that is different from an existing radiation pattern characteristic of the first radiation pattern is determined. A new registration object that includes the new radiation pattern characteristic and omits the existing radiation pattern characteristic is generated. The new registration object is caused to be stored by the SAS in lieu of the registration object.

The invention relates to the technical field of wireless communication, in particular to a coupling error calibration optimization method and system for a radiation pattern of a phased-array antenna. The method comprises the following steps: setting an expected directional diagram, and abstracting the expected directional diagram into a gate function; defining a main lobe region of the expected directional diagram, and presetting an upper limit for a side lobe region; obtaining an active directional diagram of each array element, and extracting a gain curve and a phase curve of the active directional diagram; initializing phased array excitation, and calculating an initial directional diagram; adjusting the sidelobe level amplitude of the initial directional diagram through a window function, and adjusting the beam width to a defined main lobe region; carrying out FFT (Fast Fourier Transform) on the adjusted directional diagram to solve an excitation vector, and calculating a first fitting directional diagram result; and setting a performance function to judge the performance, if the performance function is smaller than a threshold value, outputting a corresponding excitation vector, otherwise, repeating the operation until the performance function is smaller than the threshold value or the number of iterations is reached. According to the invention, high-efficiency phased array radiation pattern calibration can be realized under the condition that coupling errors among array elements are considered, and specific beam forming is realized.

A method and system for measuring an antenna radiation pattern of a harvester antenna printed on a substrate of an Internet of Things (IoT) tag are disclosed. The method includes sweeping a power level of a source radio frequency (RF) signal transmitted at a particular direction, wherein the source RF signal is received by the harvester antenna; measuring a transmission rate of signals transmitted by the IoT tag, wherein the transmission rate is proportional to the power level of a source RF signal received by the harvester antenna; determining if the measured transmission rate is substantially equal to a predefined threshold; registering, at each measured direction, a power level of a signal reaching a transmission rate is substantially equal to the predefined threshold; and plotting the antenna radiation pattern based on the registered power levels.

The present invention discloses a design method for realizing an antenna pattern based on a physics-informed neural network, belonging to the technical field of communication antennas. The method of the present invention includes the following steps: Initial customization: Set the overall two-dimensional model, and determine the corresponding far-field expected total field according to the set performance indicators; PINN architecture: Construct the PINN according to the initial defined values and the expected target; Pre-training: Obtain the initial weights of the PINN according to the initial electromagnetic information; Formal training: Add the integral equation and the Helmholtz equation of the electromagnetic inverse scattering method as physical information constraints to the PINN, and judge whether the obtained solution meets the expectation. Otherwise, execute the training process again until it meets the requirements. The method of the present invention does not rely on a large amount of training set data required by existing neural networks, and has higher efficiency; it is more flexible and has higher applicability compared with existing design methods.

The invention discloses an integrated design method for an airborne short-wave antenna feeder system, and the method comprises the steps: carrying out the targeted design of a matching network of an antenna tuner in simulation software according to an installation impedance parameter provided by antenna simulation, combining the parameters of an antenna tuner selected component, obtaining the loss of the matching network, and carrying out the iteration of the loss into an antenna radiation pattern, forming an antenna radiation direction simulation diagram with antenna feeder efficiency, performing demand interaction on an antenna and an antenna tuner according to the requirements on the gain and the radiation direction of the short-wave antenna feeder system, and performing repeated iteration to obtain a first set of antenna prototype and an antenna tuner prototype; after the whole machine is assembled, the antenna feeder system serves as a whole to test and verify the performance of an antenna prototype and an antenna tuning prototype, repeated iteration testing is carried out by designing an installation environment and using a system with a machine body prosthesis, and finally an installation test is carried out after the optimal performance target of the antenna feeder system is achieved. The radiation efficiency of the antenna feeder system is improved, and the quality of short-wave communication is improved.

The invention relates to an antenna, electronic equipment and a vehicle, in the antenna, a via hole with a connector is formed in a substrate, a first type of radiation unit and a second type of radiation unit are located on different surfaces of the substrate, and the first type of radiation unit and the second type of radiation unit are in short circuit connection through the via hole. According to the antenna, the two kinds of radiation units are arranged on the two side faces of the substrate, mutual coupling of the first kind of radiation units and the second kind of radiation units is reduced, the out-of-roundness of an antenna radiation pattern is effectively reduced, the antenna radiation has the good omnidirectional radiation characteristic, and the isolation degree between the first kind of radiation units and the second kind of radiation units is improved.

The utility model relates to the technical field of wireless communication, in particular to a 5G CPE antenna with a high Hertz frequency band. The antenna comprises a PCB, a radio frequency line, a first radiating body and a second radiating body, the first radiating body and the second radiating body are laid on the two sides of the PCB, the first radiating body and the second radiating body are oppositely arranged and form symmetrical dipoles, and feeding points are arranged at the opposite positions of the first radiating body and the second radiating body respectively. One end of the radio frequency line is respectively connected with the feeding points of the first radiator and the second radiator, and the first radiator and the second radiator are provided with notch slots for adjusting impedance. According to the utility model, the PCB board and the radio frequency cable line are used to realize 3300 MHz to 5 GHz. The antenna is made into a PCB structure, so that the antenna can be conveniently assembled on machinery equipment, passive efficiency gain is provided for the radiator structure of a dual machine, and the design of the notch and the slot position at the corresponding position enables the radiation pattern of the antenna to be better than that of a conventional antenna.

The present invention relates to an axially compact feed antenna based on parallel multi-feed points, comprising a dual-polarized Vivaldi antenna array, a short-circuit plate, a section of circular waveguide, a layer of absorbing material, and a feed network. The dual-polarized Vivaldi antenna array is installed in a metal circular waveguide, one port of which is directly connected to the short-circuit plate, and the other port is open. The antenna array placed in the waveguide cavity can effectively excite the main mode TE of the waveguide while maintaining a small axial length. 11 The mode radiates out through the open end of the waveguide, and the radiation section is close to a horn antenna, which can effectively improve the quality of the antenna radiation pattern. A layer of absorbing material is attached to the inner side of the short-circuit plate to suppress resonance and improve broadband matching performance. The working bandwidth of the present invention is 300MHz to 800MHz. Within the working bandwidth, the standing wave ratio is less than 2, the beam width range is 46° to 81°, and it has a very low cross-polarization level and a stable phase center. It can be used in test systems such as compact fields as a feed antenna.

In one example, a method performed by a processing system including at least one processor includes creating a geospatial model of an environment in which a cellular network is to be deployed, transforming, for each cellular antenna of a proposed antenna layout of the cellular network, a radiation pattern of the each cellular antenna into a signal strength array, to create a plurality of signal strength arrays, augmenting, for each signal strength array of the plurality of signal strength arrays, the each signal strength array with at least one parameter of a corresponding cellular antenna of the proposed antenna layout and at least one value describing the environment in which the cellular network is to be deployed, and estimating a coverage of the proposed antenna layout based on the signal strength array, as augmented, using a machine learning model.

The utility model discloses a high-performance log-periodic antenna, which relates to the field of electronic communication and comprises a radiation oscillator. The radiation assemblies are symmetrically arranged on the two sides of the radiation oscillator, each radiation assembly comprises multiple groups of radiation arm units which are arranged at intervals in the axial direction of the radiation oscillator, and each radiation arm comprises a first radiation arm which is vertically connected with the radiation oscillator and a second radiation arm which is located at the far end of the first radiation arm and is bent towards the radiation end of the radiation oscillator; the radiation end of the radiation oscillator is provided with an array coupling end. By designing the bent second radiation arm on the radiation oscillator, the distortion of an antenna radiation pattern caused by a conformal equipment metal shell plate is greatly reduced, and meanwhile, the second radiation arm is beneficial to improving the equivalent radiation electric size of the antenna, the low-frequency working bandwidth of the antenna can be expanded, and the size miniaturization of the antenna is realized.

Embodiments of this application provide a foldable electronic device including an antenna. The foldable electronic device include a first body, a second body, and a rotating shaft connected to the first body and the second body. The first body and the second body are rotatable around the rotating shaft. As the first body and the second body rotate, a form of the foldable electronic device may be switched between a folded state and an unfolded state. The antenna may be a slot antenna formed by hollowing out a metal housing of the first body or a metal housing of the second body. The slot antenna may include a first branch and a second branch, where the first branch and the second branch may be perpendicular to each other. This can reduce the antenna directivity coefficient, improve an antenna radiation pattern, and improve a signal coverage capability of the electronic device.

This invention relates to a method for drawing antenna radiation patterns under full-size target conditions, relating to the field of testing, and includes the following steps: adjusting the center of gravity of the full-size target to the center point of the quiet zone relative to the rotation axis of the turntable; calculating the distance between the aperture of the antenna under test and the center point of the quiet zone based on the center of gravity of the full-size target and the aperture position of the antenna under test; adjusting the support frame to make the center height of the antenna under test the same as the center point height of the quiet zone; setting the polarization of the transmitting antenna and connecting the transmitting link; setting the polarization and installation angle of the antenna under test and connecting the receiving link; computer-controlled turntable rotating from a -180° azimuth of the full-size target to +180° in a top-down counterclockwise direction, transmitting the angle signal to a spectrum analyzer or computer during the rotation; and drawing the antenna radiation pattern of the full-size target based on the test and calculation results. This invention has the advantage of being able to quickly and easily obtain the antenna radiation pattern of the antenna under full-size target conditions.

The invention provides a wide-beam dielectric resonator antenna unit based on double magnetic currents. The wide-beam dielectric resonator antenna unit comprises a rectangular dielectric resonator, a door-shaped parasitic metal ring structure, a feed gap, a feed network, a floor, an SMA connector and a dielectric plate. The rectangular dielectric resonator is of an axisymmetric structure, and the feed network and the parasitic metal ring structure are also symmetrically distributed, so that the symmetry and the stability of an antenna radiation pattern and a phase center can be ensured; the rectangular dielectric resonator antenna serving as the main radiator and the door-shaped metal ring structures of the parasitic radiators jointly act to generate a directional diagram in a wide-angle coverage range, and the door-shaped parasitic metal rings on the two sides obtain a part of energy from the rectangular dielectric resonator in a near-field coupling mode to generate radiation in the horizontal direction. The wide beam characteristic of an E-plane directional diagram is realized by combining the directional radiation of the fundamental mode of the rectangular dielectric resonator and the omnidirectional radiation of the door-shaped parasitic metal ring and matching with a proper phase; the antenna is compact and simple in structure, wide in wave beam and low in cross polarization.