Magnetoelectrical monopole antenna unit, magnetoelectrical monopole antenna array, antenna and device

Abstract

The embodiment of the application provides a magneto-electric monopole antenna unit, a magneto-electric monopole antenna array, an antenna and equipment, and belongs to the technical field of wireless communication. The antenna unit comprises a first dielectric substrate, a monopole radiator, a microstrip feed line, a metal reflector plate, a short-circuit metal column and two ground patches. It generates an electric monopole mode through the monopole radiator excitation, and generates a magnetic monopole mode through the short-circuit metal column, the ground patch and the reflector plate, and the two modes work together to realize wideband radiation and widen the beam width. The coupled currents on the two ground patches produce two pairs of opposite electric field components in the far field and offset each other, thereby realizing low cross polarization. The array composed of multiple units is loaded with a metasurface above, which significantly improves the port isolation by introducing a reflection path opposite in phase to the original coupling path. The application solves the technical problem that it is difficult to simultaneously realize wide-angle scanning, low cross polarization and high isolation in a wide frequency band.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a magnetoelectric monopole antenna element, a magnetoelectric monopole antenna array, an antenna, and a device. Background Technology

[0002] Phased array antennas, which feature wide-angle scanning capability, low cross-polarization level, and high port isolation, are key components for improving signal coverage quality and transmission reliability in modern wireless communication systems (such as 5G / 6G mobile communication, satellite communication, and radar detection).

[0003] Currently, to expand the scanning angle, the industry employs methods such as electromagnetic bandgap (EBG) structures, near-field coupling modulation, or the loading of parasitic elements. For example, one existing technology utilizes the EBG floor to suppress surface waves and broaden the element beam, achieving a scanning range of approximately ±75°; another technology generates a self-decoupling effect through optimized element layout. However, these solutions often struggle to simultaneously maintain a large scanning angle and low cross-polarization levels when operating over a wide bandwidth. Especially during large-angle scanning, cross-polarization components deteriorate significantly, impacting communication performance. Some designs aimed at suppressing cross-polarization, such as employing symmetrical structures or differential feeding, often come at the cost of sacrificing antenna bandwidth or scanning range.

[0004] In summary, a prominent challenge facing existing technologies is how to achieve wide-angle scanning (e.g., exceeding ±75°), low cross-polarization, and high element isolation simultaneously across a wide bandwidth. This has become a bottleneck restricting the development of high-performance phased array antennas. Summary of the Invention

[0005] The main objective of this application is to provide a novel antenna element and array scheme for future communication systems, which can simultaneously achieve excellent wide beam characteristics, low cross-polarization level and high port isolation within a wide frequency band, thereby providing high-performance radiating elements for wide-angle scanning phased arrays.

[0006] To achieve the above objectives, one aspect of this application provides a magnetoelectric monopole antenna element, comprising: First dielectric substrate; A metal reflector is disposed at the bottom of the first dielectric substrate; A monopole radiator and a microstrip feed line are disposed on the upper surface of the first dielectric substrate. The microstrip feed line is used to excite the monopole radiator to generate radiation in electric monopole mode. At least two short-circuited metal pillars; and The first grounding patch and the second grounding patch are disposed on the upper surface of the first dielectric substrate and are electrically connected to the metal reflector through the short-circuit metal post, respectively. The monopole radiator, the short-circuited metal pillar, the first ground patch, the second ground patch, and the metal reflector work together to induce radiation in a magnetic monopole mode. The electric monopole mode works in conjunction with the magnetic monopole mode to form broadband radiation and widen the radiation beamwidth of the antenna element. The coupling currents on the first and second ground patches generate pairwise opposing electric field components in the far field of radiation. These electric field components cancel each other out, thereby reducing the cross-polarization level of the antenna element.

[0007] In some embodiments, the first grounding patch is disposed near the microstrip feed line, and the second grounding patch is disposed near the end of the monopole radiator.

[0008] In some embodiments, the short-circuit metal pillar penetrates vertically through the first dielectric substrate.

[0009] In some embodiments, the microstrip feed line is connected to the radio frequency connector via a probe-feed method, and the probe penetrates the first dielectric substrate.

[0010] In some embodiments, the electrical length of the monopole radiator is one-quarter or one-half of the operating center frequency.

[0011] In some embodiments, the monopole radiator is a polygonal metal sheet or metal wire structure; and / or, the first grounding patch and the second grounding patch are polygonal metal patches.

[0012] In some embodiments, the main lobe of the radiation pattern of the magnetic monopole mode points to both sides perpendicular to the direction of the monopole radiator.

[0013] To achieve the above objectives, another aspect of this application provides a magnetoelectric monopole antenna array, comprising the plurality of magnetoelectric monopole antenna elements described above, wherein the plurality of magnetoelectric monopole antenna elements are arranged periodically (e.g., in a linear arrangement, an interleaved arrangement, or a two-dimensional arrangement). A first coupling path is formed between adjacent first and second magnetoelectric monopole antenna elements.

[0014] In some embodiments, one or more metasurfaces with periodic structures are arranged above the antenna array, the metasurfaces introducing a second coupling path; The second coupling path couples from the first magnetoelectric monopole antenna element to the second magnetoelectric monopole antenna element via the metasurface reflection; The second coupling path is opposite to the first coupling path, and the two cancel each other out, thereby improving the port isolation between the first magnetoelectric monopole antenna element and the second magnetoelectric monopole antenna element.

[0015] In some embodiments, the metasurface also has the effect of improving beam gain and reducing sidelobes during scanning.

[0016] In some embodiments, the metasurface structure is fabricated on a second dielectric substrate, which is disposed above the first dielectric substrate in parallel by a support structure.

[0017] To achieve the above objectives, another aspect of this application proposes a wide-angle scanning phased array antenna, including the aforementioned magnetoelectric monopole antenna array with metasurface. The phased array antenna has a port isolation greater than 17 dB within a working bandwidth of more than 20%, and can achieve a beam scanning range of not less than ±74°, with beam gain fluctuation of less than 1.7 dB, and the normalized cross-polarization level remains below -15 dB during the scanning process.

[0018] To achieve the above objectives, another aspect of the embodiments of this application proposes a wireless communication device, characterized in that it includes the above-described magnetoelectric monopole antenna unit, or the above-described magnetoelectric monopole antenna array, or the above-described wide-angle scanning phased array antenna.

[0019] The embodiments of this application include at least the following beneficial effects: 1) High integration of functions and simplification of structure: The innovative magnetoelectric monopole antenna of this application realizes three functions at the same time on a single antenna element through a unique “magnetoelectric monopole” collaborative working mechanism, which greatly simplifies antenna and array design and reduces manufacturing costs.

[0020] 2) Excellent broadband characteristics: By shorting the metal pillars on both sides and the coupling current loop on the metal reflector, an equivalent magnetic monopole mode can be generated, which greatly widens the operating bandwidth of the antenna. Its -10 dB impedance bandwidth can cover 15.5 to 31.3 GHz.

[0021] 3) Low cross-polarization design: The cross-polarization component of the antenna element comes from four x-axis horizontal currents coupled out of the first and second grounding patches in opposite directions. These four x-axis horizontal currents cancel each other out in the far field, thereby reducing the cross-polarization level of the antenna element.

[0022] 4) Wide beamwidth performance: The electric monopole antenna itself has a large beamwidth, and the cooperative radiation of the magnetic monopole further widens the antenna beamwidth (for example, from 144° to more than 154°), laying the foundation for wide-angle scanning.

[0023] 5) Flexibility in performance expansion: By loading metasurfaces with periodic structures, the isolation between units can be effectively improved (isolation is significantly improved by more than 11 dB) and radiation performance can be improved (beam tilt problem is improved and gain is improved by more than 0.6 dB).

[0024] 6) Excellent radiation performance: The phased array antenna built based on this magnetoelectric monopole antenna element achieves ultra-wide angle scanning (≥±80°) and low cross polarization (≤-15 dB) within a working bandwidth of more than 20%, while maintaining high gain and radiation efficiency. Its performance is superior to existing technologies in all aspects. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the electric monopole antenna unit provided in the first embodiment of this application.

[0026] Figure 2 This is a structural diagram of the magnetoelectric monopole antenna unit provided in the second embodiment of this application.

[0027] Figure 3 for Figure 1 and Figure 2 The simulation comparison diagram of the radiation pattern in the xoz plane of the embodiment shown.

[0028] Figure 4 for Figure 1 and Figure 2 The simulation comparison diagram of the radiation pattern in the yoz plane of the illustrated embodiment.

[0029] Figure 5 for Figure 1 and Figure 2 The simulation comparison diagram of the reflection coefficient (S11) of the embodiment shown is shown.

[0030] Figure 6 The simulation diagram of surface current distribution when operating at 27 GHz is provided for the first embodiment of this application.

[0031] Figure 7 The simulation diagram of surface current distribution at 27 GHz provided for the second embodiment of this application.

[0032] Figure 8 The cross-polarization component J provided in the first embodiment of this application x1 and J x2 A schematic diagram of the distribution.

[0033] Figure 9 The cross-polarization component J provided in the second embodiment of this application x1 J x2 J x3 and J x4 A schematic diagram of the distribution.

[0034] Figure 10 The cross-polarization pattern provided in the first embodiment of this application.

[0035] Figure 11 This is a schematic diagram showing the calculation results of the cross-polarization pattern provided in the second embodiment of this application.

[0036] Figure 12 This is a schematic diagram of the simulation results of the cross-polarization pattern provided in the first embodiment of this application.

[0037] Figure 13 This is a schematic diagram of the simulation results of the cross-polarization pattern provided in the second embodiment of this application.

[0038] Figure 14 This is a schematic diagram illustrating the principle of beam widening provided in the second embodiment of this application.

[0039] Figure 15 A schematic diagram showing the calculation results of the beam widening formula provided in the second embodiment of this application.

[0040] Figure 16 This is a structural diagram of a magnetoelectric monopole antenna element with a metasurface provided in the third embodiment of this application.

[0041] Figure 17 This is a schematic diagram of the unit coupling path in array 1 provided in the second embodiment of this application.

[0042] Figure 18 This is a schematic diagram of the unit coupling path in array 2 provided in the third embodiment of this application.

[0043] Figure 19 This is a schematic diagram comparing the simulation results of the electric field distribution when arrays 1 and 2 are working, as provided in the second and third embodiments of this application.

[0044] Figure 20 This is a schematic diagram comparing the simulation results of arrays 1 and 2 with respect to S-parameters provided in the second and third embodiments of this application.

[0045] Figure 21 A schematic diagram comparing the simulation results of arrays 1 and 2 with respect to the actual peak gain curves provided in the second and third embodiments of this application.

[0046] Figure 22 A schematic diagram comparing the simulation results of arrays 1 and 2 with respect to the unit radiation beams provided in the second and third embodiments of this application.

[0047] Figure 23 A schematic diagram of an extended 1×8 phased array structure provided for the third embodiment of this application.

[0048] Figure 24 A schematic diagram showing the simulation and test results of the 1×8 phased array with respect to the S-parameters provided in the third embodiment of this application.

[0049] Figure 25 A schematic diagram of simulation and test results of the actual peak gain curve of the 1×8 phased array provided in the third embodiment of this application.

[0050] Figure 26 This is a schematic diagram of the simulation and test results of a 1×8 phased array with respect to beam scanning provided in the third embodiment of this application.

[0051] Figure 27 This is a structural diagram of a magnetoelectric monopole antenna unit in the microwave band provided in the fourth embodiment of this application. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0054] This application provides a magnetoelectric monopole antenna array with broadband, low cross-polarization, and wide-angle scanning capabilities, belonging to the fields of mobile communication, radar detection, satellite communication, and the Internet of Things. The antenna array includes several linearly arranged magnetoelectric monopole antenna elements. Each magnetoelectric monopole antenna element consists of a first dielectric substrate, a monopole radiator, a microstrip feed line, a metal reflector, multiple short-circuited metal pillars, a first ground patch, and a second ground patch. The monopole radiator is excited by the microstrip feed line, generating an electric monopole mode with wide-beam radiation characteristics. The short-circuited metal pillars and the metal reflector generate current loops, which can be equivalent to a magnetic monopole mode. The electric and magnetic monopole modes work together to achieve broadband characteristics. The magnetic monopole mode also has the function of widening the beamwidth of the antenna element. Four horizontally coupled currents, each in opposite directions, are generated on the short-circuited patch. These four currents are distributed along the x-axis and are the main source of the antenna cross-polarization component. Because they cancel each other out during far-field radiation, the magnetoelectric monopole antenna element has low cross-polarization characteristics. By arranging a metasurface structure on the second dielectric substrate above the magnetoelectric monopole antenna array, the isolation between array elements can be effectively improved, and its radiation performance can be enhanced.

[0055] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0056] For ease of description, the following text and accompanying drawings will use examples of a magnetoelectric monopole antenna array based on a broadband antenna element, a beam widening method, a low cross-polarization implementation method, and a metasurface structure with decoupling performance and improved radiation characteristics to illustrate the structure of the low cross-polarization and wide-angle scanning phased array antenna provided in the embodiments of the present invention. It should be understood that the embodiments of this application are not limited to the magnetoelectric monopole antenna array based on a broadband antenna element, a beam widening method, a low cross-polarization implementation method, and a metasurface structure with decoupling performance and improved radiation characteristics, but should include all low cross-polarization wide-beam antenna elements with the features of the present invention and their corresponding low cross-polarization and wide-angle scanning phased array antennas.

[0057] First embodiment: like Figure 1 As shown, in the first embodiment, the first dielectric substrate 14 used is a Rogers 5880 dielectric substrate. A dumbbell-shaped monopole radiator 11 is located at the center of the upper surface of the first dielectric substrate 14, as shown... Figure 1As shown by the central vertical double dashed line, a feeding metal post 16 penetrates the first dielectric substrate 14, connecting the top layer radiator and the feeding port. One end of the electric monopole radiator 11 surrounds a U-shaped first ground patch 12, which is connected to the metal reflector 15 by multiple short-circuit metal posts 13.

[0058] Second embodiment: like Figure 2 As shown, based on the first embodiment, a U-shaped second grounding patch 21, which is mirror-symmetrical to the U-shaped first grounding patch 12, is arranged at the other end of the monopole radiator 11. It is connected to the metal reflector 15 by a plurality of short-circuit metal pillars 22.

[0059] like Figure 3 The normalized radiation patterns of the first and second embodiments shown in the xoz plane and Figure 4 The normalized radiation patterns of the first and second embodiments in the yoz plane are shown. The second embodiment has a wider beam and a lower cross-polarization level compared to the first embodiment.

[0060] like Figure 5 As shown, the second embodiment has a wider operating frequency band than the first embodiment, covering 16 to 31 GHz.

[0061] like Figure 6 and Figure 7 As shown, to explain the broadband, wide beam, and low cross-polarization principle of the second embodiment, simulation results of the current distribution during normal operation of the first and second embodiments are presented. Wherein, the current J... y The main polarization components of the first and second embodiments are radiated, and the current J x1 and J x2 The cross-polarization component of the first embodiment is radiated, and the current J x1 J x2 J x3 and J x4 The cross-polarization component of the second embodiment is emitted. The low cross-polarization is achieved based on the principle that the opposite cross-polarization components cancel each other out.

[0062] Furthermore, such as Figure 8 As shown, when the origin of the coordinate system is located at the center of the first embodiment, the current J... x1 The resulting cross-polarized electric field distribution can be expressed as: (1) in d 1 / 2 represents the current J x1 Horizontal distance to the origin of the coordinate system d 2 / 2 indicates that from current J x1The perpendicular distance to the origin. I x1 | represents the amplitude of the electric field distribution. This is determined by the current J. x2 The resulting cross-polarization distribution can be expressed as: (2) Current J x1 and J x2 Forming a two-element array with a spacing of d1, the current J x1 and J x2 There exists a π phase difference. Assume | I x1 | = | I x2 | = | I m In the first embodiment, the current J x1 and J x2 The normalized composite radiogram can be represented as: (3) Furthermore, such as Figure 9 As shown, in the second embodiment, a current J is introduced. x3 and J x4 Cancel the current J x1 and J x2 Radiation. Assume current J x1 J x2 J x3 and J x4 Having the same | I m |Amplitude, then current J x1 J x2 J x3 and J x4 The normalized composite pattern can be represented as: (4) According to formulas (3) and (4), as Figure 10 and Figure 11 The displayed F 2 and F The calculation result for 3. Clearly... F The amplitude of 3 is lower than F 2. F The radial pattern of 2 shows two main lobes, while F The radial pattern of 3 shows four main lobes. F The cross-polarized radiation power of 2 is more concentrated and stronger. Therefore, a current J is introduced. x3 and J x4 This can minimize the cross-polarization level. For example... Figure 12 and 13The simulation results and calculation results of the cross-polarization patterns of the first and second embodiments shown respectively are highly consistent, and the two are basically the same in shape.

[0063] like Figure 7 As shown, the second embodiment utilizes the useless vertical current J from the first embodiment. v1 With J v2 J x5 Together, they form a current loop, which is ultimately equivalent to a magnetic current M. x Its polarization mode is similar to J y They work in unison to form a broadband magnetoelectric monopole antenna.

[0064] Furthermore, the magnetic current M x It also has the effect of widening the beam, and its working principle is as follows: Figure 14 As shown, the current J y and magnetic current M x The formulas for the electric field patterns that can be generated are as follows: (5) (6) in k It is the wave number. h J and h M They are Figure 14 The current J shown y and magnetic current M x The height from the floor is 0.25 meters. λ g ,in λ g It is the waveguide wavelength at 27 GHz.

[0065] Furthermore, according to formulas (1) and (2), the current J y and magnetic current M x The electric field pattern produced by the common radiation can be represented as: (7) Furthermore, Figure 15 Based on formulas (5), (6), and (7), different plots were drawn. θ Value F J , F M and F Amplitude pattern in the xoz plane. M obtained from equation (6) x The amplitude pattern in θ It reaches its minimum value at 0°. θ It reaches its maximum value at ±57°.y The amplitude pattern in θ It reaches its maximum value at 0°, exhibiting wide beam characteristics. When J y With M x When the distributions are superimposed, the composite pattern obtained by formula (7) has a wide beamwidth of about 152°.

[0066] Third embodiment: like Figure 16 As shown, the third embodiment provided in this application introduces a metasurface 31 composed of periodic rectangular microstrip lines (with a height of [missing information]) above the radiator in the second embodiment. h 1) The antenna element design is completed. The metasurface 31 is printed on top of the second dielectric substrate 32. The metasurface 31 can reduce mutual coupling effects and restore radiation modes, thereby improving scanning performance and antenna gain.

[0067] Furthermore, such as Figure 17 and 18 As shown, the function of the metasurface 31 is analyzed by modeling and simulating arrays 1 and 2. Array 1 consists of two antenna elements of the second embodiment distributed along the X-axis, and array 2 consists of two antenna elements of the third embodiment distributed along the X-axis, with a spacing of 0.4 between the elements. λ g .like Figure 17 As shown, there is a coupling path in array 1, which is the first coupling path. Figure 18 As shown, the wave reflected by the metasurface 31 in array 2 generates a new coupling path, which is the second coupling path. If the inherent coupled wave and the reflected wave have the same amplitude but opposite phase, the second coupling path can cancel the first coupling path. Therefore, the coupling energy is reduced after cancellation.

[0068] Furthermore, such as Figure 19 Simulation results of the electric field intensity distribution for arrays 1 and 2 are shown respectively. When antenna 1 in array 1 is excited, the strong electric field energy is coupled to antenna 2. When the original electric field and the coupled electric field are superimposed, the total electric field generated by antenna 1 propagates to the left half of space, and the radiation pattern is distorted. After loading metasurface 31 into array 2, the amplitude of the coupled electric field on antenna 2 is reduced. The coupled electric field has a weak effect on the original electric field. The electric field generated by antenna 1 propagates along the +z axis, and the radiation pattern is restored.

[0069] Furthermore, to verify the decoupling effect, Figure 20The simulation results of S-parameters for arrays 1 and 2 are presented. Both arrays 1 and 2 exhibit good impedance matching within the target operating bandwidth of 24–30 GHz. Array 1 achieves a mutual coupling level of -15 dB at 30 GHz, while array 2 remains below -21 dB in the 24–30 GHz range, showing an improvement of approximately 11 dB at 30 GHz. Figure 21 The radiation patterns of arrays 1 and 2 at 30 GHz are shown when antenna 1 is excited. In array 1, the main lobe direction of antenna 1 is approximately -35°, and its radiation pattern exhibits distortion. For array 2, the radiation pattern of antenna 1 is... θ The distribution at 0° is almost symmetrical. Figure 21 Results and Figure 19 The analysis results are consistent. Introducing metasurface 31 increases the gain within the operating bandwidth by approximately 0.6 dBi, such as... Figure 22 As shown.

[0070] Furthermore, such as Figure 23 As shown, according to the broadband low cross-polarization wide beam antenna proposed in the third embodiment, a 1×8 antenna array distributed along the x-axis is extended. Holes 41 are punched at both ends of the first and second dielectric substrates to mount nylon pillar supports. An SMPM metal connector 42 is welded below the floor for power supply. Figure 24 As shown, this antenna array has impedance matching below -10 dB within a 24-30 GHz operating bandwidth, while achieving port isolation above 17.7 dB. Figure 25 As shown, the maximum gain of this antenna array increases from 12.7 dBi at 24 GHz to 13.7 dBi at 30 GHz. This antenna array has beam scanning capability. Figure 26 Simulation and test results of the phased array antenna scanning performance at 27 GHz are presented. It can be seen that its maximum scanning angle can reach ±81° and the gain drops to within 1.7 dBi.

[0071] Fourth embodiment: like Figure 27 As shown, the second embodiment provided in this application can shift the millimeter-wave frequency band to the microwave frequency band by changing the size and structure. Figure 1 In the fourth embodiment, the first dielectric plate 14 is a non-essential structure, and the dumbbell-shaped monopole radiator 11 at the top layer can be replaced with other shapes, such as a polygonal strip structure 51 printed by 3D metal printing. Figure 2 The first grounding patch 21 and the short-circuit metal post 22 can replace the single metal structure 52. The metal structure 52 and the metal floor 53 can be integrally 3D printed. The fourth embodiment of this application has only two structural components, which can greatly reduce processing costs.

[0072] This embodiment also provides a communication device, which is a transmitting and receiving device for a wireless communication system. This communication device can integrate the magnetoelectric monopole antenna unit, array or phased array described in any of the above embodiments, and can be applied to the aforementioned wireless communication systems that require high-performance antennas.

[0073] In summary, this application designs a wideband, low-cross-polarization, and wide-beam magnetoelectric monopole antenna. The low cross-polarization is achieved by introducing multiple pairwise opposite cross-polarization current components, causing them to cancel each other out in far-field radiation. The wide beam is achieved by introducing a magnetic monopole to further increase the beamwidth of the antenna element, given that the electric monopole itself already has a wide beam. Simultaneously, an additional metasurface structure is loaded above the magnetoelectric monopole antenna, introducing a new coupling path that cancels out the inherent coupling path, ultimately achieving decoupling. Finally, based on this low-cross-polarization wide-beam antenna element, a 1×8 phased array antenna is configured, achieving a scanning range of ±81° with 22% operating bandwidth.

[0074] The above description is merely a preferred embodiment of this patent application, but the scope of protection of this patent application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in this patent application, based on the technical solution and application concept of this patent application, shall fall within the scope of protection of this patent application.

Claims

1. A magnetoelectric monopole antenna element, characterized in that, include: First dielectric substrate; A metal reflector is disposed at the bottom of the first dielectric substrate; A monopole radiator and a microstrip feed line are disposed on the upper surface of the first dielectric substrate. The microstrip feed line is used to excite the monopole radiator to generate radiation in electric monopole mode. At least two short-circuited metal pillars; as well as The first grounding patch and the second grounding patch are disposed on the upper surface of the first dielectric substrate and are electrically connected to the metal reflector through short-circuit metal pillars, respectively. The monopole radiator, short-circuited metal pillar, first ground patch, second ground patch, and metal reflector work together to induce radiation in a magnetic monopole mode. The electric monopole mode works in conjunction with the magnetic monopole mode to form broadband radiation and widen the radiation beamwidth of the antenna element. The coupling current on the first and second ground patches generates pairwise opposing electric field components in the far field of radiation. These electric field components cancel each other out to reduce the cross-polarization level of the antenna element.

2. The magnetoelectric monopole antenna element according to claim 1, characterized in that, The first grounding patch is positioned close to the microstrip feed line, and the second grounding patch is positioned close to the end of the monopole radiator.

3. The magnetoelectric monopole antenna element according to claim 1, characterized in that, The short-circuit metal pillar penetrates vertically through the first dielectric substrate.

4. The magnetoelectric monopole antenna element according to any one of claims 1 to 3, characterized in that, The microstrip feed line is connected to the radio frequency connector via a probe-feed method, and the probe penetrates the first dielectric substrate.

5. The magnetoelectric monopole antenna element according to any one of claims 1 to 3, characterized in that, The electrical length of the monopole radiator is one-quarter or one-half of the operating center frequency.

6. The magnetoelectric monopole antenna element according to any one of claims 1 to 3, characterized in that, The monopole radiator is a polygonal metal sheet or metal wire structure; and / or, the first grounding patch and the second grounding patch are polygonal metal patches.

7. The magnetoelectric monopole antenna element according to any one of claims 1 to 3, characterized in that, The main lobe of the radiation pattern of the magnetic monopole mode points to both sides perpendicular to the direction of the monopole radiator.

8. A magnetoelectric monopole antenna array, characterized in that, It includes a plurality of magnetoelectric monopole antenna elements as described in any one of claims 1 to 7, wherein the plurality of magnetoelectric monopole antenna elements are arranged periodically; It also includes metasurface structures disposed in the radiation direction of the plurality of magnetoelectric monopole antenna elements; The metasurface structure is configured to introduce a reflective coupling path with the opposite phase to the original coupling path between adjacent first and second antenna elements, thereby improving the port isolation between the first and second antenna elements.

9. The magnetoelectric monopole antenna array according to claim 8, characterized in that, The metasurface structure is fabricated on a second dielectric substrate, which is disposed above the first dielectric substrate.

10. A wide-angle scanning phased array antenna, characterized in that, Including the magnetoelectric monopole antenna array as described in claim 8 or 9; By applying a controllable phase gradient to each antenna element in the array, the radiated beam can be scanned in space. The wide beam and low cross-polarization characteristics of the magnetoelectric monopole antenna element work together with the high isolation characteristics of the magnetoelectric monopole antenna array to enable the phased array antenna to achieve wide-angle scanning in a wide frequency band while maintaining a low cross-polarization level.

11. A wireless communication device, characterized in that, It includes a magnetoelectric monopole antenna element as described in any one of claims 1 to 7, or a magnetoelectric monopole antenna array as described in any one of claims 8 to 9, or a wide-angle scanning phased array antenna as described in claim 10.

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