A low-profile millimeter-wave magnetoelectric dipole antenna array

Abstract

The present invention designs a low-profile millimeter-wave magnetoelectric dipole antenna array, comprising a coplanar waveguide feeding network structure, a millimeter-wave magnetoelectric dipole antenna array, and a coplanar waveguide to grounded coplanar waveguide transition structure. The antenna array structure and the coplanar waveguide feeding network structure are on the same dielectric layer, and the entire antenna structure uses only one dielectric substrate. The overall antenna structure has the characteristics of low profile, simple structure, and easy integration. To facilitate actual processing and testing, a coplanar waveguide to grounded coplanar waveguide transition structure is also introduced. Due to the inherent characteristics of the magnetoelectric dipole antenna, the antenna array exhibits good performance. The resulting millimeter-wave antenna has a low profile, simple structure, and is on the same dielectric substrate layer. This solves the problems of complex antenna structures, high costs, and low integration in existing antennas. It is suitable for millimeter-wave wireless communication applications and enriches the application scenarios of this type of antenna.

Description

Technical Field

[0001] The present invention belongs to the field of microwave and millimeter waves, and in particular relates to a low-profile millimeter-wave magnetoelectric dipole antenna array. Background Art

[0002] Magnetoelectric dipole antennas, designed based on the complementary source principle, possess inherent low cross-polarization, low backlobes, and broadband characteristics, making them an optimal antenna choice for many wireless communication systems. However, their three-dimensional structure, high profile, and large size are also obvious drawbacks. This is inconsistent with the miniaturization, integration, and unified design concepts currently pursued by various electronic information systems, severely restricting the application range of such antennas. Currently, existing low-profile design methods mainly focus on vertical metal walls, while a small number of low-profile designs use meandering slits in the floor. These complex structures make them difficult to directly apply to magnetoelectric dipole antennas with other polarization schemes. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the disadvantages of the magnetoelectric dipole antenna, such as its three-dimensional structure and high cross-section, seriously restrict its application range.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A low-profile millimeter-wave magnetoelectric dipole antenna array includes a feed network structure and a millimeter-wave magnetoelectric dipole antenna array disposed on a dielectric substrate. The feed network structure includes a first linear center conductor strip disposed on one side of the dielectric substrate, and a first grounding conductor strip and a second grounding conductor strip disposed on both sides of the first center conductor strip on the one side of the dielectric substrate.

[0006] The millimeter-wave magnetoelectric dipole antenna array includes a preset number of antenna units arranged on a dielectric substrate, each antenna unit having the same structure. Each antenna unit includes a metal patch unit arranged on the other surface of the dielectric substrate, a first linear slot arranged on a first ground conductor strip corresponding to the position of the antenna unit, and a second linear slot arranged on a second ground conductor strip corresponding to the position of the antenna unit; the center line of the first slot along the linear direction in which it is located and the center line of the second slot along the linear direction in which it is located are on a straight line, and the straight line is orthogonal to the straight line of the first central conductor strip; the first slot is connected to the slot between the first ground conductor strip and the first central conductor strip, and the second slot is connected to the slot between the second ground conductor strip and the first central conductor strip; the antenna units are arranged non-overlappingly along the extension direction of the first central conductor strip.

[0007] Preferably, the metal patch unit of the antenna unit includes a first metal patch, a second metal patch, a third metal patch, and a fourth metal patch of the same shape and size. Each metal patch is provided with a preset number of first metallized through holes, and the first metallized through holes penetrate the metal patch, the dielectric substrate, and the grounding conductor strip. The positions of the first metal patch and the second metal patch are symmetrical about the straight line axis where the first gap is located to form a first group of metal patches, and the positions of the third metal patch and the fourth metal patch are symmetrical about the straight line axis where the second gap is located to form a second group of metal patches. The positions of the first group of metal patches and the second group of metal patches are symmetrical about the straight line axis where the first center conductor strip is located.

[0008] Preferably, the present invention further comprises two transfer structures, the structures of the two transfer structures are identical, each transfer structure comprises a lower metal layer arranged on one side of the dielectric substrate, and an upper metal layer arranged on the other side of the dielectric substrate, the lower metal layer comprises a second central conductor strip in a straight line, and a third grounding conductor strip and a fourth grounding conductor strip arranged on both sides of the second central conductor strip, one end of the second central conductor strip is connected to one end of the first central conductor strip, and a center line of the second central conductor strip along the straight line direction thereof is aligned with a center line of the first central conductor strip along the straight line direction thereof, the third grounding conductor strip is connected to the first grounding conductor strip, and the fourth grounding conductor strip is connected to the second grounding conductor strip, a preset number of second metallized through holes are provided on the lower metal layer, the dielectric substrate, and the upper metal layer, a preset number of mechanical through holes are also provided on the lower metal layer, and the mechanical through holes are connected to the coaxial connector to realize power feeding, and the other end of the second central conductor strip is in contact with a probe in the coaxial connector;

[0009] One end of the first central conductor strip is connected to one end of a second central conductor strip corresponding to one transition structure, and the other end of the first central conductor strip is connected to one end of a second central conductor strip corresponding to another transition structure.

[0010] Preferably, the first gap and the second gap have the same size.

[0011] Preferably, the width of the second central conductor strip is greater than the width of the first central conductor strip.

[0012] Preferably, both ends of the second central conductor strip have the same gradient structure, starting from the width of the second central conductor strip, the width of the second central conductor strip changes based on a preset slope until it reaches the width of the first central conductor strip.

[0013] Preferably, the metal patches are trapezoidal metal patches, the upper bottom edges of the first metal patch and the second metal patch are opposite to each other, and the upper bottom edges of the third metal patch and the fourth metal patch are opposite to each other.

[0014] Preferably, the distance between any two antenna units in the preset number of antenna units is equal.

[0015] Preferably, the metal patch is a regular trapezoidal metal patch, the upper bases of the first metal patch and the second metal patch are opposite and parallel, and the upper bases of the third metal patch and the fourth metal patch are opposite and parallel.

[0016] Preferably, the extension length of each first gap is not less than the distance from the point on the opposite sides of the first metal patch and the second metal patch that is closest to the gap between the first grounding conductor strip and the first center conductor strip to the gap; the extension length of each second gap is not less than the distance from the point on the opposite sides of the third metal patch and the fourth metal patch that is closest to the gap between the second grounding conductor strip and the first center conductor strip to the gap.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a low-profile millimeter-wave magnetoelectric dipole antenna array, including a coplanar waveguide feeding network structure, a millimeter-wave magnetoelectric dipole antenna array, and a coplanar waveguide to grounded coplanar waveguide transition structure. The antenna array structure and the coplanar waveguide feeding network structure are on the same dielectric layer, and the entire antenna structure uses only one dielectric substrate. The overall antenna structure has the characteristics of low profile, simple structure, and easy integration. In order to facilitate actual processing and testing, a coplanar waveguide and grounded coplanar waveguide transition structure is also introduced, enriching the application scenarios of similar antennas. Due to the characteristics of the magnetoelectric dipole antenna itself, the antenna array exhibits good performance. The resulting millimeter-wave antenna has a low overall structural profile, simple structure, and is on the same dielectric substrate layer, solving the problems of complex antenna structure, high cost, and low integration of existing antennas. It is suitable for millimeter-wave wireless communication applications and enriches the application scenarios of this type of antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the low-profile millimeter-wave magnetoelectric dipole antenna array of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the millimeter-wave magnetoelectric dipole antenna array of the present invention;

[0020] Figure 3 This is a schematic diagram of the low-profile millimeter-wave magnetoelectric dipole antenna array switching structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the side structure of a low-profile millimeter-wave magnetoelectric dipole antenna array according to the present invention;

[0022] Figure 5 The simulated and measured reflection coefficients of the low-profile millimeter-wave magnetoelectric dipole antenna array of the present invention;

[0023] Figure 6 The simulated and measured gains of the low-profile millimeter-wave magnetoelectric dipole antenna array of the present invention;

[0024] Figure 7 The E-plane simulated and measured directional patterns of the low-profile millimeter-wave magnetoelectric dipole antenna array of the present invention;

[0025] Figure 8 The directional patterns of the H-plane simulation and actual measurement of the low-profile millimeter-wave magnetoelectric dipole antenna array of the present invention are shown.

[0026] In the figure: 1-first center conductor strip, 2-first ground conductor strip, 3-second ground conductor strip, 4-antenna unit, 5-first slot, 6-first slot, 7-first metallized through hole, 8-second center conductor strip, 9-upper metal layer, 10-lower metal layer, 11-mechanical through hole, 12-second metallized through hole. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings. The following examples can enable those skilled in the art to more fully understand the present invention, but are not intended to limit the present invention in any way.

[0028] like Figure 1 As shown, a low-profile millimeter-wave magnetoelectric dipole antenna array includes a feed network structure and a millimeter-wave magnetoelectric dipole antenna array disposed on a dielectric substrate. The feed network structure includes a first linear center conductor strip 1 disposed on one side of the dielectric substrate, and first and second ground conductor strips 2 and 3 on either side of the first center conductor strip 1. In this embodiment, a rectangular dielectric substrate, such as Rogers 5880, is used. The first center conductor strip 1 is symmetrical about the exact center point of one side of the rectangular dielectric substrate. The first center conductor strip 1 is 0.4 mm wide and has 0.5 mm slots on either side. The first and second ground conductor strips 2 and 3 are then located. This is equivalent to coating the entire surface of the rectangular dielectric substrate with a layer of metal, then machining two slots to create the center conductor strip. The center conductor strip is located in the middle, and the first and second ground conductor strips 2 and 3 are located on either side of the center conductor strip, separated by a slot.

[0029] like Figure 2As shown, the millimeter-wave magnetoelectric dipole antenna array includes a preset number of antenna units 4 arranged on a dielectric substrate, and each antenna unit 4 has the same structure. Each antenna unit 4 includes a metal patch unit arranged on the other side of the dielectric substrate, a first linear slot 5 arranged on the first ground conductor strip 2 corresponding to the position of the antenna unit 4, and a second linear slot 6 arranged on the second ground conductor strip 3 corresponding to the position of the antenna unit 4; the center line of the first slot 5 along the linear direction thereof and the center line of the second slot 6 along the linear direction thereof are on a straight line, and the straight line is orthogonal to the straight line where the first central conductor strip 1 is located; the first slot 5 is connected to the slot between the first ground conductor strip 2 and the first central conductor strip 1, and the second slot 6 is connected to the slot between the second ground conductor strip 3 and the first central conductor strip 1; the antenna units 4 are arranged non-overlappingly along the extension direction of the first central conductor strip 1.

[0030] In this embodiment, the first slot 5 and the second slot 6 are of equal size; the slot length is 2.55 mm and the width is 0.2 mm. The first slot 5 and the second slot 6 are symmetrical about the center point of the antenna unit 4. The distance between two antenna units 4 in the predetermined number of antenna units 4 is equal, that is, the distance between the center points of the two antenna units 4 is equal. In this embodiment, the millimeter-wave magnetoelectric dipole antenna array comprises four antenna units, with an element spacing of 8.8 mm, that is, the distance between the center points of the two antenna units 4 is 8.8 mm, which effectively improves the antenna's application performance. The number of antenna units can be set to eight, sixteen, etc., as required.

[0031] The metal patch unit of the antenna unit 4 includes a first metal patch, a second metal patch, a third metal patch, and a fourth metal patch of the same shape and size. Each metal patch is provided with a preset number of first metalized through holes 7, and the first metalized through holes 7 penetrate the metal patch, the dielectric substrate, and the ground conductor strip. That is, the first metalized through hole 7 provided on the first metal patch penetrates the first metal patch, the dielectric substrate, and the first ground conductor strip, the first metalized through hole 7 provided on the second metal patch penetrates the second metal patch, the dielectric substrate, and the first ground conductor strip, and the first metalized through hole 7 provided on the third metal patch penetrates The first metalized through-hole 7 set on the fourth metal patch passes through the third metal patch, the dielectric substrate, and the second grounding conductor strip. The first metalized through-hole 7 transmits the excitation energy to the electric dipole; the positions of the first metal patch and the second metal patch are symmetrical about the straight line where the first gap 5 is located to form a first group of metal patches, and the positions of the third metal patch and the fourth metal patch are symmetrical about the straight line where the second gap 6 is located to form a second group of metal patches; the positions of the first group of metal patches and the second group of metal patches are symmetrical about the straight line where the first center conductor strip 1 is located.

[0032] In this embodiment, the metal patches are trapezoidal, with the upper bases of the first and second metal patches facing each other, and the upper bases of the third and fourth metal patches facing each other. Furthermore, the metal patches are regular trapezoidal, with the upper bases of the first and second metal patches facing each other and parallel, and the upper bases of the third and fourth metal patches facing each other and parallel. The metal patches are symmetrical on both sides of the first center conductor strip 1, and the distance between the two closest points of their upper bases is 2.3 mm. The upper bases of the first and second metal patches face each other, and the distance between their upper bases is equal to the width of the first gap 5. The upper bases of the third and fourth metal patches face each other, and the distance between their upper bases is equal to the width of the second gap 6. The first metallized through-holes 7 are two through-holes, each with a radius of 0.3 mm, a center distance of 1.1 mm, and a distance of 0.5 mm from the center of each through-hole to the upper base. The metal patch is formed by copper cladding on the upper surface of the dielectric substrate. In the present invention, the metal patch acts as an electric dipole, while the first and second gaps 5 and 6 act as magnetic dipoles.

[0033] The extension length of each first gap 5 is not less than the distance from the point on the opposite sides of the first metal patch and the second metal patch that is closest to the gap between the first ground conductor strip 2 and the first center conductor strip 1 to the gap; the extension length of each second gap 6 is not less than the distance from the point on the opposite sides of the third metal patch and the fourth metal patch that is closest to the gap between the second ground conductor strip 3 and the first center conductor strip 1 to the gap.

[0034] like Figure 3 As shown, a low-profile millimeter-wave magnetoelectric dipole antenna array further includes two transfer structures. The structures of the two transfer structures are identical. Each transfer structure includes a lower metal layer 10 provided on one side of a dielectric substrate and an upper metal layer 9 provided on the other side of the dielectric substrate. Figure 4As shown, the upper metal layer 9 is a layer of metal covered on one side of the dielectric substrate, and the upper metal layers corresponding to the two transition structures are respectively on both sides of the metal patch unit and do not contact the metal patch unit. The lower metal layer 10 includes a second central conductor strip 8 in a straight line, and a third grounding conductor strip and a fourth grounding conductor strip arranged on both sides of the second central conductor strip 8. One end of the second central conductor strip 8 is connected to one end of the first central conductor strip 1, and the center line of the second central conductor strip 8 along the straight direction thereof is on a straight line with the center line of the first central conductor strip 1 along the straight direction thereof. The third grounding conductor strip is connected to the first grounding conductor strip 2, and the fourth grounding conductor strip is connected to the second grounding conductor strip 3; it is equivalent to constructing a feeding network structure, covering the entire surface of a rectangular dielectric substrate with a layer of metal, and then processing two gaps. The length of the first central conductor strip 1 is not less than the arrangement length of the millimeter wave magnetoelectric dipole antenna array, and the two ends of the first central conductor strip 1 are respectively connected to the two second central conductor strips 8. The width of the first central conductor strip 1 is 0.4 mm, and the widths of the gaps on both sides of the first central conductor strip 1 are 0.5 mm respectively. The width of the second center conductor strip 8 is 0.8 mm, and the width of the gaps on both sides of the second center conductor strip 8 is 0.3 mm respectively; the middle part is the center conductor strip, and the two ground conductor strips are separated by a gap on both sides of the center conductor strip; a preset number of second metallized through holes 12 are provided on the lower metal layer 10, the dielectric substrate, and the upper metal layer 9. In this embodiment, the second metallized through holes 12 are provided on the third ground conductor strip and the fourth ground conductor strip, and the second metallized through holes 12 are provided on the third ground conductor strip and the fourth ground conductor strip. The opposite edges are greater than 0.2mm away from the edge and are arranged along the edge without overlapping. The number of second metallized through holes 12 in this structure is 22, the distance between the centers of adjacent through holes is 0.7mm, and the through hole radius is 0.2mm; a preset number of mechanical through holes 11 are also provided on the lower metal layer 10, which are connected to the coaxial connector through the mechanical through holes to realize feeding. The mechanical through holes 11 pass through the lower metal layer 10, the dielectric substrate, and the upper metal layer 9. The other end of the second center conductor strip 8 contacts the probe in the coaxial connector; the position and size of the mechanical through hole 11 are related to the connected coaxial connector.

[0035] Two transition structures are placed on a dielectric substrate at either end of the millimeter-wave magnetoelectric dipole antenna array. One end of the first central conductor strip 1 is connected to one end of the corresponding second central conductor strip 8 of one transition structure, and the other end of the first central conductor strip 1 is connected to one end of the corresponding second central conductor strip 8 of the other transition structure. The transition structures are used to connect the input port of the coplanar waveguide feed network to the grounded coplanar waveguide.

[0036] The width of the second central conductor strip 8 is greater than that of the first central conductor strip 1. Both ends of the second central conductor strip 8 exhibit the same tapered structure. Starting from the width of the second central conductor strip 8, the width of the second central conductor strip 8 changes according to a preset slope until it reaches the width of the first central conductor strip 1. In this embodiment, the width of the second central conductor strip 8 is 0.8 mm, and the width of the first central conductor strip 1 is 0.4 mm. Starting from the width of the second central conductor strip 8, the width of the second central conductor strip 8 changes according to a preset slope until it reaches the width of the first central conductor strip 1. Both ends of the second central conductor strip 8 gradually decrease from 0.8 mm to 0.4 mm based on a slope K = -tan4.5. The end of the second central conductor strip 8 connected to the first central conductor strip 1 is connected to the first central conductor strip 1 after the tapered structure. The length of the first central conductor strip 1 is no less than the total length of the millimeter-wave magnetoelectric dipole antenna array.

[0037] The present invention provides a low-profile millimeter-wave magneto-electric dipole antenna array whose entire structure is on the same plane and symmetrical about its central axis. The low-profile millimeter-wave magneto-electric dipole antenna array constructed in this embodiment is designed for an application frequency of 28 GHz, but the structure can be adjusted to accommodate different frequencies.

[0038] Based on the above scheme, the following simulations and tests were conducted to verify the application effect of the millimeter-wave magnetoelectric dipole antenna array provided by the present invention. The specific results are as follows:

[0039] like Figure 5 and Figure 6 The figure shows the simulated and measured reflection coefficient and gain of the antenna array of this embodiment. The measured operating bandwidth of the antenna array for a reflection coefficient less than -10dB is 7.5% (from 26GHz to 28.1GHz). Within this operating frequency band, the measured gain of the antenna is between 7.2 and 8.15dBi, and the gain is stable.

[0040] like Figure 7 and Figure 8 The simulated and measured radiation patterns of the E-plane and H-plane of the antenna array at 28 GHz show that the measured results are in good agreement with the simulation results. The cross-polarization of the antenna array is less than -10 dB, and the front-to-back ratio is greater than 10 dB.

[0041] The present invention designs a low-profile millimeter-wave magnetoelectric dipole antenna array, comprising a coplanar waveguide feeding network structure, a millimeter-wave magnetoelectric dipole antenna array, and a coplanar waveguide to grounded coplanar waveguide transition structure. The antenna array structure and the coplanar waveguide feeding network structure are on the same dielectric layer, and the entire antenna structure uses only one dielectric substrate. The overall antenna structure has the characteristics of low profile, simple structure, and easy integration. To facilitate actual processing and testing, a coplanar waveguide to grounded coplanar waveguide transition structure is also introduced, enriching the application scenarios of similar antennas. Due to the inherent characteristics of the magnetoelectric dipole antenna, the antenna array exhibits good performance. The resulting millimeter-wave antenna has a low overall structure profile, simple structure, and is on the same dielectric substrate layer, solving the problems of complex antenna structure, high cost, and low integration of existing antennas. It is suitable for millimeter-wave wireless communication applications and enriches the application scenarios of this type of antenna.

[0042] The above are only preferred embodiments of the present invention, but do not limit the scope of the patent of the present invention. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments or to replace some of the technical features therein with equivalents. Any equivalent structure made by using the contents of the present invention specification and drawings, directly or indirectly applied to other related technical fields, is also within the scope of protection of the patent of the present invention.

Claims

1. A low-profile millimeter-wave magnetoelectric dipole antenna array, characterized by: The invention comprises a feeding network structure and a millimeter wave magnetoelectric dipole antenna array arranged on a dielectric substrate, wherein the feeding network structure comprises a first central conductor strip (1) arranged in a straight line on one side of the dielectric substrate, and a first grounding conductor strip (2) and a second grounding conductor strip (3) on both sides of the first central conductor strip (1) on the one side of the dielectric substrate; The millimeter wave magnetoelectric dipole antenna array includes a preset number of antenna units (4) arranged on a dielectric substrate, each antenna unit (4) has the same structure, and each antenna unit (4) includes a metal patch unit, a first slot (5), and a second slot (6), wherein the metal patch unit is arranged on the other side of the dielectric substrate at a location corresponding to the location of the antenna unit (4) to which it belongs, the first slot (5) is arranged on the first ground conductor strip (2) at a location corresponding to the location of the antenna unit (4) to which it belongs, and the first slot (5) is in a straight line shape, and the second slot (6) is arranged on the second ground conductor strip (3) at a location corresponding to the location of the antenna unit (4) to which it belongs. The antenna unit (4) is arranged at a position where the second slot (6) is in a straight line; the center line of the first slot (5) along the straight line direction thereof and the center line of the second slot (6) along the straight line direction thereof are on a straight line, and the straight line is orthogonal to the straight line where the first center conductor strip (1) is located; the first slot (5) is connected to the slot between the first ground conductor strip (2) and the first center conductor strip (1), and the second slot (6) is connected to the slot between the second ground conductor strip (3) and the first center conductor strip (1); the antenna units (4) are arranged in a non-overlapping manner along the extension direction of the first center conductor strip (1); The metal patch unit of the antenna unit (4) includes a first metal patch, a second metal patch, a third metal patch, and a fourth metal patch of the same shape and size. Each metal patch is provided with a preset number of first metallized through holes (7). The first metallized through holes (7) penetrate the metal patch, the dielectric substrate, and the ground conductor strip. The positions of the first metal patch and the second metal patch are symmetrical about the straight line where the first gap (5) is located, forming a first group of metal patches. The positions of the third metal patch and the fourth metal patch are symmetrical about the straight line where the second gap (6) is located, forming a second group of metal patches. The positions of the first group of metal patches and the second group of metal patches are symmetrical about the straight line where the first center conductor strip (1) is located. The invention also includes two transfer structures, the structures of the two transfer structures are the same, and each transfer structure includes a lower metal layer (10) arranged on one side of the dielectric substrate, and an upper metal layer (9) arranged on the other side of the dielectric substrate, the lower metal layer (10) includes a second central conductor strip (8) in a straight line, and a third grounding conductor strip and a fourth grounding conductor strip arranged on both sides of the second central conductor strip (8), one end of the second central conductor strip (8) is connected to one end of the first central conductor strip (1), and the center line of the second central conductor strip (8) along the straight line direction thereof is connected to the first central conductor strip (1). The center line of a center conductor strip (1) along the straight direction thereof is on a straight line, the third grounding conductor strip is connected to the first grounding conductor strip (2), the fourth grounding conductor strip is connected to the second grounding conductor strip (3), a preset number of second metallized through holes (12) are provided on the lower metal layer (10) and penetrate the lower metal layer (10), the dielectric substrate, and the upper metal layer (9), and a preset number of mechanical through holes (11) are also provided on the lower metal layer (10) and connected to the coaxial connector through the mechanical through holes to realize feeding, and the other end of the second center conductor strip (8) is in contact with a probe in the coaxial connector; One end of the first central conductor strip (1) is connected to one end of a second central conductor strip (8) corresponding to a transition structure, and the other end of the first central conductor strip (1) is connected to one end of a second central conductor strip (8) corresponding to another transition structure.

2. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 1, characterized in that: The first gap (5) and the second gap (6) have the same size.

3. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 1, characterized in that: The width of the second center conductor strip (8) is greater than the width of the first center conductor strip (1).

4. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 3, characterized in that: Both ends of the second central conductor strip (8) present the same gradient structure, starting with the width of the second central conductor strip (8), and the width of the second central conductor strip (8) changes based on a preset slope until it reaches the width of the first central conductor strip (1).

5. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 1, characterized in that: The metal patches are trapezoidal metal patches, the upper bottom edges of the first metal patch and the second metal patch are opposite to each other, and the upper bottom edges of the third metal patch and the fourth metal patch are opposite to each other.

6. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 1, characterized in that: The distance between two antenna units (4) in the preset number of antenna units (4) is equal.

7. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 1, characterized in that: The metal patches are regular trapezoidal metal patches, the upper bottom edges of the first metal patch and the second metal patch are opposite and parallel, and the upper bottom edges of the third metal patch and the fourth metal patch are opposite and parallel.

8. The low-profile millimeter-wave magnetoelectric dipole antenna array according to claim 1, characterized in that: The extension length of each first gap (5) is not less than the distance from the point on the opposite sides of the first metal patch and the second metal patch that is closest to the gap between the first grounding conductor strip (2) and the first center conductor strip (1) to the gap; the extension length of each second gap (6) is not less than the distance from the point on the opposite sides of the third metal patch and the fourth metal patch that is closest to the gap between the second grounding conductor strip (3) and the first center conductor strip (1) to the gap.

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