Magnetoelectric dipole antenna and antenna array

Abstract

The invention discloses a magnetoelectric dipole antenna and an antenna array. The magnetoelectric dipole antenna comprises a substrate module, a radiation assembly arranged on a first surface of the substrate module, a first feed probe, a second feed probe, a first feed line and a second feed line, wherein the first feed probe and the second feed probe are arranged in the substrate module, and the first feed line and the second feed line are arranged on a second surface of the substrate module. The first feed probe is electrically connected with the first feed line, and the second feed probe is electrically connected with the second feed line. The radiation assembly receives an input electromagnetic wave signal, and the input electromagnetic wave signal is respectively transmitted to the first feed line and the second feed line through the first feed probe and the second feed probe. After a plurality of magnetoelectric dipole antennas are combined into the antenna array, the gain and circular polarization effects are further improved under the condition that the S parameter is not obviously deteriorated.

Description

Technical Field

[0001] This invention relates to a magnetoelectric dipole antenna and antenna array, and more particularly to a magnetoelectric dipole antenna and antenna array for receiving circularly polarized electromagnetic waves. Background Technology

[0002] Chinese patent application CN114614273A discloses a single-layer magnetoelectric dipole array antenna with four feed ports, comprising four magnetoelectric dipole elements forming a 2×2 array. Each magnetoelectric dipole element includes a dielectric substrate, four square dipoles arranged in a 2×2 array on the upper surface of the dielectric substrate, a magnetoelectric dipole disposed on the upper surface of the dielectric substrate and surrounded by the four square dipoles, and a coaxial probe disposed at one end of the magnetoelectric dipole and inserted downwards into the substrate from the magnetoelectric dipole. In this single-layer magnetoelectric dipole array antenna, any two adjacent magnetoelectric dipole elements are connected by a microstrip line. In each magnetoelectric dipole element, the end of the magnetoelectric dipole with the coaxial probe is the feed port of the magnetoelectric dipole element. By adjusting the phase of the input electromagnetic wave signal received at different feed ports, this single-layer magnetoelectric dipole array antenna can freely switch between dual polarization and circular polarization, and achieve a circular polarization axial ratio of less than 0.2dB. Summary of the Invention

[0003] One objective of this invention is to provide a magnetoelectric dipole antenna with a technical approach different from that of previous technologies.

[0004] The present invention relates to a magnetoelectric dipole antenna for receiving an input electromagnetic wave signal, comprising a substrate module, a radiating component, a first feed probe, a second feed probe, a first feed line, and a second feed line.

[0005] The substrate module includes a first surface and a second surface that are opposite to each other, and the first surface and the second surface are arranged along a first direction.

[0006] The radiating component is disposed on the first surface of the substrate module.

[0007] The first feed probe and the second feed probe are disposed in the substrate module and are located within the projection range of the radiation component along the first direction. The length of the second feed probe extending along the first direction is greater than the length of the first feed probe extending along the first direction.

[0008] The first feed line and the second feed line are disposed on the second surface of the substrate module. The first feed line is electrically connected to the first feed probe, and the second feed line is electrically connected to the second feed probe.

[0009] The radiating component receives the input electromagnetic wave signal, transmits the input electromagnetic wave signal to the first feed probe and the second feed probe via electromagnetic induction, and then transmits it to the first feed line and the second feed line respectively for signal transmission.

[0010] The magnetoelectric dipole antenna of the present invention further includes several conductive posts that extend from the radiating component through the substrate module along the first direction and serve as magnetic dipoles in the magnetoelectric dipole antenna, while the radiating component serves as an electric dipole in the magnetoelectric dipole antenna.

[0011] The present invention relates to a magnetoelectric dipole antenna, wherein the first feed probe includes a first connecting portion disposed in the substrate module and having a first main end and a first sub-end with opposite orientations; a first main rod extending from the first main end of the first connecting portion along a first direction toward a second surface of the substrate module and contacting the second surface; and a first sub-rod extending from the first sub-end of the first connecting portion along the first direction toward the second surface of the substrate module but not contacting the second surface. The extension length of the first main rod is greater than the extension length of the first sub-rod, and the line connecting the first main end and the first sub-end is parallel to a first main end. In the second direction, the second power supply probe includes a second connecting portion disposed in the substrate module and having a second main end and a second secondary end opposite to each other, a second main rod extending from the second main end of the second connecting portion along the first direction toward the second surface of the substrate module and contacting the second surface, and a second secondary rod extending from the second secondary end of the second connecting portion along the first direction toward the second surface of the substrate module but not contacting the second surface. The extension length of the second main rod is greater than the extension length of the second secondary rod, and the connection direction of the second main end and the second secondary end is parallel to a third direction.

[0012] In the magnetoelectric dipole antenna of the present invention, the second connection portion of the second feed probe is closer to the radiating component than the first connection portion of the first feed probe. The extension length of the second main rod along the first direction is greater than the extension length of the first main rod along the first direction. The line connecting the center point of the first connection portion of the first feed probe and the center point of the second connection portion of the second feed probe is located on the same straight line as the center point of the first surface of the substrate module. The first feed probe and the second feed probe do not contact each other.

[0013] The present invention provides a magnetoelectric dipole antenna in which a first feed line extends from the endpoint of the first main rod that contacts the second surface in a direction away from the first sub-rod, with the extension direction parallel to the second direction, and is electrically connected to the first feed probe through the first main rod. A second feed line extends from the endpoint of the second main rod that contacts the second surface in a direction away from the second sub-rod, with the extension direction parallel to the third direction, and is electrically connected to the second feed probe through the second main rod.

[0014] The present invention relates to a magnetoelectric dipole antenna, wherein the radiating component is an N-sided thin sheet, where N is a positive integer greater than 4.

[0015] The present invention relates to a magnetoelectric dipole antenna, wherein the radiating component is an octagonal thin sheet comprising four main body portions and four connecting portions. The four main body portions are arranged around the center point of a first surface of a substrate module. Two of the four main body portions are mirrored along a second direction with reference to the center point of the first surface, and the other two of the four main body portions are mirrored along a third direction with reference to the center point of the first surface. Any two adjacent main body portions are electrically connected through one of the connecting portions. Each main body portion defines a first slot and a second slot. Each main body portion is mirror-symmetrical about the line connecting the center point of the first slot and the center point of the second slot as a central axis. The four main body portions and the four connecting portions together define a main dividing slot.

[0016] The present invention relates to a magnetoelectric dipole antenna, wherein the four main body parts are a first main body part, a second main body part, a third main body part and a fourth main body part spaced apart from each other. The second main body part is rotated 90 degrees counterclockwise relative to the first main body part, the third main body part is rotated 90 degrees counterclockwise relative to the second main body part, and the fourth main body part is rotated 90 degrees counterclockwise relative to the third main body part.

[0017] The present invention relates to a magnetoelectric dipole antenna in which the first main rod of the first feed probe is entirely located within the projection range of the first slot of the first main body along the first direction; the first secondary rod of the first feed probe is entirely located within the projection range of the first slot of the third main body along the first direction; the second main rod of the second feed probe is entirely located within the projection range of the first slot of the second main body along the first direction; and the second secondary rod of the second feed probe is entirely located within the projection range of the first slot of the fourth main body along the first direction.

[0018] Another object of the present invention is to provide an antenna array composed of several of these magnetoelectric dipole antennas.

[0019] The antenna array of the present invention includes a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element.

[0020] The second antenna element is set to be rotated 90 degrees counterclockwise relative to the first antenna element, and the line connecting the center point of the second antenna element and the center point of the first antenna element is parallel to the X-axis direction.

[0021] The third antenna element is set with the second antenna element rotated 90 degrees counterclockwise, and the line connecting the center point of the third antenna element and the center point of the second antenna element is parallel to the Y-axis direction.

[0022] The fourth antenna element is positioned 90 degrees counterclockwise from the third antenna element, and the line connecting the center point of the fourth antenna element and the center point of the third antenna element is parallel to the X-axis direction.

[0023] The first antenna unit, the second antenna unit, the third antenna unit, and the fourth antenna unit each include one of the magnetoelectric dipole antennas.

[0024] The beneficial effects of this invention are as follows: the magnetoelectric dipole antenna receives the input electromagnetic wave signal through the radiating component, and transmits it to the first feed line and the second feed line respectively via the first feed probe and the second feed probe, thus completing signal transmission. After combining several magnetoelectric dipole antennas into the antenna array, the gain and circular polarization effects are further improved without significant deterioration of the S-parameters. Attached Figure Description

[0025] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, wherein

[0026] Figure 1 This is a partial perspective view of an embodiment of the magnetoelectric dipole antenna of the present invention;

[0027] Figure 2 This is another partial perspective view of this embodiment of the magnetoelectric dipole antenna of the present invention, and... Figure 1 Same, but some components are omitted;

[0028] Figure 3 This is a top view of this embodiment of the magnetoelectric dipole antenna of the present invention;

[0029] Figure 4 This is a cross-sectional view of this embodiment of the magnetoelectric dipole antenna of the present invention;

[0030] Figure 5 This is an S-parameter diagram of this embodiment of the magnetoelectric dipole antenna of the present invention;

[0031] Figure 6 This is a gain diagram of this embodiment of the magnetoelectric dipole antenna of the present invention;

[0032] Figure 7 This is a circular polarization axial ratio diagram of this embodiment of the magnetoelectric dipole antenna of the present invention;

[0033] Figure 8 This is a top view of an embodiment of the antenna array of the present invention;

[0034] Figure 9 This is an S-parameter diagram of this embodiment of the antenna array of the present invention;

[0035] Figure 10 This is a gain diagram of this embodiment of the antenna array of the present invention;

[0036] Figure 11 This is a circular polarization axial ratio diagram of this embodiment of the antenna array of the present invention. Detailed Implementation

[0037] See Figures 1 to 4 An embodiment of the magnetoelectric dipole antenna of the present invention is used to receive input electromagnetic wave signals, comprising a substrate module 1, a radiating component 2, eight conducting pillars 3, a first feed probe 41, a second feed probe 42, a first feed line 51, and a second feed line 52.

[0038] The substrate module 1 includes an upper surface and a lower surface that are opposite to each other, and the upper and lower surfaces are arranged along the Z-axis. The substrate module 1 includes a first substrate 11, a first adhesive layer 12, a second substrate 13, a ground layer 14, a second adhesive layer 15, and a third substrate 16, which are stacked sequentially from top to bottom and whose center points all pass through the Z-axis. The first substrate 11, the first adhesive layer 12, the second substrate 13, the second adhesive layer 15, and the third substrate 16 are dielectric materials, and the ground layer 14 is metal.

[0039] The radiating component 2 is an N-sided metal sheet, where N>4. In this embodiment, the radiating component 2 is octagonal. The radiating component 2 serves as the electric dipole in a magnetoelectric dipole antenna and is disposed on the upper surface of the first substrate 11 of the substrate module 1. The center point of the radiating component 2 and the center point of the upper surface of the first substrate 11 are located on the same vertical line.

[0040] The radiating assembly 2 includes four main body portions 211-214 and four connecting portions 221. The four main body portions 211-214 are arranged around the center point of the upper surface of the first substrate 11. Any two adjacent main body portions are electrically connected through a connecting portion 221. The four main body portions 211-214 are mirror-symmetrical. Each main body portion 211-214 defines a first slot 231 and a second slot 232. Each main body portion 211-214 is mirror-symmetrical about the line connecting the center point of the first slot 231 and the center point of the second slot 232 as the central axis. The four main body portions 211-214 and the four connecting portions 221 together define a main dividing slot 233 that is approximately cross-shaped. The main dividing slot 233 is approximately square at the point where the Z-axis passes through.

[0041] The four main body parts are a first main body part 211, a second main body part 212, a third main body part 213, and a fourth main body part 214, which are spaced apart from each other. The first main body part 211 and the third main body part 213 are respectively disposed in the positive and negative directions of the X-axis, and are mirrored with the Z-axis as the center point. The second main body part 212 and the fourth main body part 214 are respectively disposed in the positive and negative directions of the Y-axis, and are mirrored with the Z-axis as the center point. When viewed from top to bottom, the second main body part 212 is rotated 90 degrees counterclockwise relative to the first main body part 211, the third main body part 213 is rotated 90 degrees counterclockwise relative to the second main body part 212, and the fourth main body part 214 is rotated 90 degrees counterclockwise relative to the third main body part 213.

[0042] The eight conductive posts 3 are metal posts arranged around the Z-axis and serve as magnetic dipoles in the magnetoelectric dipole antenna. The eight conductive posts 3 are distributed in groups of two to the four main body sections 211-214. Each group of conductive posts 3 extends from the lower surface of its assigned main body section along the negative direction of the Z-axis and penetrates the substrate module 1. A first feed probe 41 and a second feed probe 42 are disposed in the substrate module 1 and located within the projection range of the radiating component 2 along the Z-axis. The length of the second feed probe 42 extending along the Z-axis is greater than the length of the first feed probe 41 extending along the Z-axis.

[0043] The first power supply probe 41 includes a first connecting portion 411 disposed on the upper surface of the second substrate 13 and having a first main end 412 and a first secondary end 413 in opposite directions, a first main rod 414 extending from the first main end 412 along the negative direction of the Z-axis, and a first secondary rod 415 extending from the first secondary end 413 along the negative direction of the Z-axis. The first connecting portion 411 is bonded to the first adhesive layer 12. The line connecting the first main end 412 and the first secondary end 413 is parallel to the X-axis. The first main rod 414 passes through the second substrate 13, the ground layer 14, the second adhesive layer 15, and the third substrate 16. The first secondary rod 415 is inserted into the second substrate 13.

[0044] The second power supply probe 42 includes a second connecting portion 421 disposed on the lower surface of the first substrate 11 and having a second main end 422 and a second secondary end 423 in opposite directions, a second main rod 424 extending from the second main end 422 along the negative direction of the Z-axis, and a second secondary rod 425 extending from the second secondary end 423 along the negative direction of the Z-axis. The second connecting portion 421 is bonded to the first adhesive layer 12. The line connecting the second main end 422 and the second secondary end 423 is parallel to the Y-axis. The second main rod 424 passes through the first adhesive layer 12, the second substrate 13, the ground layer 14, the second adhesive layer 15, and the third substrate 16. The second secondary rod 425 passes through the first adhesive layer 12 and is inserted into the second substrate 13.

[0045] The center point of the projection of the first main rod 414 along the Z-axis is parallel to the Z-axis along the line connecting the center point of the first slot 231 of the first main body 211. The center point of the projection of the second main rod 424 along the Z-axis is parallel to the Z-axis along the line connecting the center point of the first slot 231 of the second main body 212. The center point of the projection of the first auxiliary rod 415 along the Z-axis is parallel to the Z-axis along the line connecting the center point of the first slot 231 of the third main body 213. The center point of the projection of the second auxiliary rod 425 along the Z-axis is parallel to the Z-axis along the line connecting the center point of the first slot 231 of the fourth main body 214. The first main rod 414, the first auxiliary rod 415, the second main rod 424, and the second auxiliary rod 425 are all located within the projection range of the corresponding first slot 231 along the Z-axis. The center point of the first connection portion 411 of the first power supply probe 41, the center point of the second connection portion 421 of the second power supply probe 42, and the center point of the first surface of the substrate module 1 are located on the same straight line, and this straight line is parallel to the Z-axis. There is no contact between the first power supply probe 41 and the second power supply probe 42.

[0046] The first feed line 51 is disposed on the lower surface of the third substrate 16, electrically connected to the first feed probe 41, and extends from the end point of the first main rod 414 through the lower surface of the third substrate 16 in the positive direction of the X-axis, and then turns to extend in the positive direction of the Y-axis without exceeding the projection range of the radiation component 2 along the Z-axis.

[0047] The second feed line 52 is disposed on the lower surface of the third substrate 16, electrically connected to the second feed probe 42, and extends from the end point of the second main rod 424 through the lower surface of the third substrate 16 in the positive direction of the Y-axis.

[0048] The radiating component 2 receives the input electromagnetic wave signal and transmits it to the first feed probe 41 and the second feed probe 42 via electromagnetic induction, and then transmits it to the first feed line 51 and the second feed line 52 respectively for signal transmission.

[0049] The operating frequency of the magnetoelectric dipole antenna embodiment of the present invention is in the frequency band range of 17.7 GHz to 21.2 GHz.

[0050] See Figure 5 The S-parameter diagram of this embodiment of the magnetoelectric dipole antenna of the present invention is shown. Curve S11 represents the reflection coefficient of the first feed line 51, curve S22 represents the reflection coefficient of the second feed line 52, and curve S21 represents the transmission coefficient from the first feed line 51 to the second feed line 52. Curves S11 and S22 are both less than -10 dB in the operating range of 17.7 GHz to 21.2 GHz, and curve S21 is less than -20 dB in the operating range of 17.7 GHz to 21.2 GHz.

[0051] See Figure 6 The gain diagram of this embodiment of the magnetoelectric dipole antenna of the present invention at different frequencies is shown. The gain value is above 6.6dB in the operating range of 17.7GHz to 21.2GHz.

[0052] See Figure 7 The axial ratio diagram of this embodiment of the magnetoelectric dipole antenna of the present invention is shown. The axial ratio is less than 1.5 dB in the operating range of 17.7 GHz to 21.2 GHz.

[0053] See Figure 8 One embodiment of the antenna array of the present invention includes a first antenna element 611, a second antenna element 612, a third antenna element 613, and a fourth antenna element 614. Each of the first antenna element 611, the second antenna element 612, the third antenna element 613, and the fourth antenna element 614 has a magnetoelectric dipole antenna as described in the aforementioned embodiment. Each antenna element 611-614 includes a first feed line 621, 623, 625, 627 and a second feed line 622, 624, 626, 628.

[0054] Four antenna elements 611-614 are arranged in a 2x2 array, with the upper left antenna element 611 rotated 90 degrees counterclockwise. Specifically, the second antenna element 612 is positioned opposite the first antenna element 611, rotated 90 degrees counterclockwise, and the line connecting the center point of the second antenna element 612 and the center point of the first antenna element 611 is parallel to the X-axis. The third antenna element 613 is positioned opposite the second antenna element 612, rotated 90 degrees counterclockwise, and the line connecting the center point of the third antenna element 613 and the center point of the second antenna element 612 is parallel to the Y-axis. The fourth antenna element 614 is positioned opposite the third antenna element 613, rotated 90 degrees counterclockwise, and the line connecting the center point of the fourth antenna element 614 and the center point of the third antenna element 613 is parallel to the X-axis.

[0055] The antenna array embodiments of the present invention operate in a frequency band between 17.7 GHz and 21.2 GHz.

[0056] See Figure 9 The S-parameter diagram of this embodiment of the antenna array of the present invention is shown. Curve S11 represents the reflection coefficient of the first feed line (621, 623, 625, 627), curve S22 represents the reflection coefficient of the second feed line (622, 624, 626, 628), and curve S21 represents the penetration coefficient from the first feed line (621, 623, 625, 627) to the second feed line (622, 624, 626, 628). S11 and S22 are both less than -10dB in the operating range of 17.7GHz to 21.2GHz, and S21 is less than -20dB in the operating range of 17.7GHz to 21.2GHz.

[0057] See Figure 10 The gain diagram of this embodiment of the antenna array of the present invention is shown. The gain value is above 10dB in the operating range of 17.7GHz to 21.2GHz.

[0058] See Figure 11 The axial ratio diagram of this embodiment of the antenna array of the present invention is shown. The axial ratio is less than 0.03dB in the operating range of 17.7GHz to 21.2GHz.

[0059] In summary, the magnetoelectric dipole antenna receives the input electromagnetic wave signal through the radiating component 2, and transmits it to the first feed line 51 and the second feed line 52 via the first feed probe 41 and the second feed probe 42, respectively, thus completing signal transmission. Combining several magnetoelectric dipole antennas into the antenna array further enhances the gain and circular polarization effect without significant deterioration of the S-parameters.

[0060] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention shall still fall within the scope of the present invention.

Claims

1. A magnetoelectric dipole antenna for receiving input electromagnetic wave signals, characterized in that, Include: A substrate module includes a first surface and a second surface opposite to each other, the first surface and the second surface being arranged along a first direction; A radiating component is disposed on the first surface of the substrate module; The first feed probe and the second feed probe are disposed in the substrate module and are located within the projection range of the radiation component along the first direction. The length of the second feed probe extending along the first direction is greater than the length of the first feed probe extending along the first direction. and A first feed line and a second feed line are disposed on the second surface of the substrate module. The first feed line is electrically connected to the first feed probe, and the second feed line is electrically connected to the second feed probe. The radiating component receives the input electromagnetic wave signal, transmits the input electromagnetic wave signal to the first feed probe and the second feed probe via electromagnetic induction, and then transmits it to the first feed line and the second feed line respectively for signal transmission.

2. The magnetoelectric dipole antenna according to claim 1, characterized in that, The magnetoelectric dipole antenna further includes several conductive posts that extend from the radiating component through the substrate module along the first direction and serve as magnetic dipoles in the magnetoelectric dipole antenna, while the radiating component serves as an electric dipole in the magnetoelectric dipole antenna.

3. The magnetoelectric dipole antenna according to claim 1, characterized in that, The first power supply probe includes a first connecting portion disposed in the substrate module and having opposite first main ends and first secondary ends; a first main rod extending from the first main end of the first connecting portion along the first direction toward the second surface of the substrate module and contacting the second surface; and a first secondary rod extending from the first secondary end of the first connecting portion along the first direction toward the second surface of the substrate module but not contacting the second surface. The extension length of the first main rod is greater than the extension length of the first secondary rod, and the connection direction of the first main end and the first secondary end is parallel to the second direction. The second power supply probe includes a second connecting portion disposed in the substrate module and having opposite second main ends and second secondary ends; a second main rod extending from the second main end of the second connecting portion along the first direction toward the second surface of the substrate module and contacting the second surface; and a second secondary rod extending from the second secondary end of the second connecting portion along the first direction toward the second surface of the substrate module but not contacting the second surface. The extension length of the second main rod is greater than the extension length of the second secondary rod, and the connection direction of the second main end and the second secondary end is parallel to the third direction.

4. The magnetoelectric dipole antenna according to claim 3, characterized in that, The second connection portion of the second feed probe is closer to the radiation component than the first connection portion of the first feed probe. The extension length of the second main rod along the first direction is greater than the extension length of the first main rod along the first direction. The center point of the first connection portion of the first feed probe, the center point of the second connection portion of the second feed probe, and the center point of the first surface of the substrate module are on the same straight line. The first feed probe and the second feed probe are not in contact with each other.

5. The magnetoelectric dipole antenna according to claim 3, characterized in that, The first feed line extends from the end point of the first main rod that contacts the second surface in a direction away from the first secondary rod, with the extension direction parallel to the second direction, and is electrically connected to the first feed probe through the first main rod. The second feed line extends from the end point of the second main rod that contacts the second surface in a direction away from the second secondary rod, with the extension direction parallel to the third direction, and is electrically connected to the second feed probe through the second main rod.

6. The magnetoelectric dipole antenna according to claim 1, characterized in that, The radiating component is an N-sided thin sheet, where N is a positive integer greater than 4.

7. The magnetoelectric dipole antenna according to claim 6, characterized in that, The radiating component is an octagonal sheet comprising four main bodies and four connecting parts. The four main bodies are arranged around the center point of the first surface of the substrate module. Two of the four main bodies are mirror-imaged along the second direction with the center point of the first surface as a reference, and the other two of the four main bodies are mirror-imaged along the third direction with the center point of the first surface as a reference. Any two adjacent main bodies are electrically connected through one of the connecting parts. Each main body defines a first slot and a second slot. Each main body is mirror-symmetrical about the line connecting the center point of the first slot and the center point of the second slot as a central axis. The four main bodies and the four connecting parts together define a main partition groove.

8. The magnetoelectric dipole antenna according to claim 7, characterized in that, The four main body parts are a first main body part, a second main body part, a third main body part, and a fourth main body part that are spaced apart from each other. The second main body part is rotated 90 degrees counterclockwise relative to the first main body part, the third main body part is rotated 90 degrees counterclockwise relative to the second main body part, and the fourth main body part is rotated 90 degrees counterclockwise relative to the third main body part.

9. The magnetoelectric dipole antenna according to claim 8, characterized in that, The first main rod of the first power supply probe is entirely located within the projection range of the first slot of the first main body along the first direction. The first auxiliary rod of the first power supply probe is entirely located within the projection range of the first slot of the third main body along the first direction. The second main rod of the second power supply probe is entirely located within the projection range of the first slot of the second main body along the first direction. The second auxiliary rod of the second power supply probe is entirely located within the projection range of the first slot of the fourth main body along the first direction.

10. An antenna array, characterized in that, Include: First antenna element; The second antenna element is set by rotating the first antenna element 90 degrees counterclockwise, and the line connecting the center point of the second antenna element and the center point of the first antenna element is parallel to the X-axis direction. The third antenna element is set with the second antenna element rotated 90 degrees counterclockwise, and the line connecting the center point of the third antenna element and the center point of the second antenna element is parallel to the Y-axis direction. and The fourth antenna element is set by rotating the third antenna element 90 degrees counterclockwise, and the line connecting the center point of the fourth antenna element and the center point of the third antenna element is parallel to the X-axis direction. The first antenna unit, the second antenna unit, the third antenna unit, and the fourth antenna unit each include the magnetoelectric dipole antenna as described in any one of claims 1 to 9.

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