A broadband dual-polarized magnetoelectric dipole antenna

Abstract

The application discloses a broadband dual-polarized magnetoelectric dipole antenna, which comprises a first dielectric layer and a second dielectric layer arranged below the first dielectric layer, the first dielectric layer and the second dielectric layer are connected through an adhesive layer to serve as an antenna base supporting a magnetoelectric dipole unit, the magnetoelectric dipole unit comprises metal patches and a magnetic dipole column serving as electric dipoles and magnetic dipoles, the magnetic dipole column is arranged below the second dielectric layer through the first dielectric layer, the metal patches are arranged in four and in a ring shape on the upper side of the first dielectric layer, the shape of the metal patches is a rectangle with half-elliptical cut corners arranged on both sides of the outer edge, and any one of the metal patches is coupled with two gain patches arranged on the first dielectric layer, and the gain patches are circular. The application solves the problem of poor impedance bandwidth capacity of the magnetoelectric dipole antenna in the prior art, thereby meeting the demand of people for network information transmission speed.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and more specifically to a broadband dual-polarized magnetoelectric dipole antenna. Background Technology

[0002] With the rapid advancement of 5G and 6G technologies, the millimeter-wave band has shown unprecedented application prospects, becoming a key force driving the transformation of the wireless communication field. Millimeter-wave antennas, with their significant advantages of short wavelength, high bandwidth, and low latency, play a central role in improving the performance of wireless communication systems.

[0003] Existing magnetoelectric dipole antennas have poor impedance bandwidth capabilities, meaning they are limited in their ability to effectively transmit and receive signals within a specific frequency range. Therefore, existing magnetoelectric dipole antennas, to a certain extent, cannot meet the growing demand for faster network information transmission speeds and also pose a certain obstacle to the construction of 5G millimeter-wave communication systems. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing magnetoelectric dipole antennas have poor impedance bandwidth capabilities, thus failing to meet people's demands for network information transmission speed, and to provide a broadband dual-polarized magnetoelectric dipole antenna.

[0005] To address the shortcomings of the aforementioned technical problems, the present invention adopts the following technical solution: a magnetoelectric dipole antenna, comprising a first dielectric layer and a second dielectric layer disposed below the first dielectric layer, wherein the first dielectric layer and the second dielectric layer are connected by an adhesive layer to serve as an antenna substrate supporting a magnetoelectric dipole unit, wherein the magnetoelectric dipole unit comprises a metal patch and a magnetic dipole pillar for serving as an electric dipole and a magnetic dipole, the magnetic dipole pillar passing through the first dielectric layer and disposed on the lower side of the second dielectric layer, and four metal patches disposed in a ring evenly on the upper side of the first dielectric layer;

[0006] The shape of the metal patch is a rectangle with semi-elliptical chamfers on both sides of its outer edge;

[0007] Each of the aforementioned metal patches is coupled with two gain patches disposed on the first dielectric layer, and the gain patches are circular.

[0008] As a further optimization of the magnetoelectric dipole antenna of the present invention: the upper end of the magnetic dipole column is located at the apex corner with the metal patch facing inward.

[0009] As a further optimization of the magnetoelectric dipole antenna of the present invention: the four magnetic dipole pillars have the same outer diameter and are symmetrically arranged, and all four magnetic dipole pillars are made of copper.

[0010] As a further optimization of the magnetoelectric dipole antenna of the present invention: the surface of the metal patch at the connection with the magnetic dipole column and the top surface of the magnetic dipole column are bonded together.

[0011] As a further optimization of the magnetoelectric dipole antenna of the present invention: the gain patch is symmetrically disposed at the two semi-elliptical chamfered outer edge endpoints of the metal patch, and the gain patch does not contact the side of the metal patch.

[0012] As a further optimization of the magnetoelectric dipole antenna of the present invention: both the metal patch and the gain patch are made of copper.

[0013] A broadband dual-polarized magnetoelectric dipole antenna includes any one of the magnetoelectric dipole antennas described in claims 1-6. The magnetoelectric dipole antenna is provided with a dual-polarization unit, which includes two orthogonally arranged and mutually coupled Γ-shaped metal probes. The two Γ-shaped metal probes are located at the center of four metal patches for resonant dual-polarized radiation.

[0014] As a further optimization of the broadband dual-polarized magnetoelectric dipole antenna of the present invention: a metal grounding layer is provided on the lower side of the second dielectric layer, and a Γ-shaped metal probe is connected to a feed hole provided on the metal grounding layer so that the metal grounding layer feeds the dual-polarization unit and drives the metal patch to resonate with the magnetic dipole column.

[0015] As a further optimization of the broadband dual-polarized magnetoelectric dipole antenna of the present invention: the two Γ-shaped metal probes are respectively disposed on the upper side and the lower side of the first dielectric layer, and the two Γ-shaped metal probes are respectively arranged along the transverse and longitudinal directions of the first dielectric layer.

[0016] As a further optimization of the broadband dual-polarized magnetoelectric dipole antenna of the present invention: the Γ-shaped metal probe includes a metal sheet arranged laterally or longitudinally, the metal sheet is disposed on the upper or lower side of the first dielectric layer, and a long metal pillar and a short metal pillar are respectively provided on the side of the metal sheet facing the first dielectric layer. The long metal pillar passes through the adhesive layer and is disposed on the lower side of the second dielectric layer, and the short metal pillar is disposed in the adhesive layer or passes through the adhesive layer and is disposed in the second dielectric layer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention improves the operating bandwidth of the magnetoelectric dipole unit by setting a semi-elliptical chamfer on the metal patch, thereby changing the path of the current passing through the metal patch. Simultaneously, a circular gain patch is set at the outer edge of the semi-elliptical chamfer of the metal patch, increasing the physical size of the metal patch and changing the current distribution around its periphery to improve signal transmission gain.

[0019] Furthermore, by setting up a dual-polarization unit and four metal patches around the dual-polarization unit, the magnetoelectric dipole unit can work with the dual-polarization unit to achieve dual-linear polarization radiation, thereby enabling the magnetoelectric dipole unit and the dual-polarization unit to form a dual-polarized magnetoelectric dipole antenna with high bandwidth within the operating frequency band.

[0020] In addition, a metal grounding layer and a Γ-shaped metal probe connected to the feed hole on the metal grounding layer are set to feed the Γ-shaped metal probe, thereby causing the Γ-shaped metal probe, the metal patch and the magnetic dipole to generate inductive and capacitive reactance, so that the three interact to generate resonance and broaden the frequency band of the antenna. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the electric dipole antenna of the present invention;

[0022] Figure 2 This is an exploded perspective view of the electric dipole antenna of the present invention;

[0023] Figure 3 This is a top view of the electric dipole antenna of the present invention.

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the broadband dual-polarized magnetoelectric dipole antenna of the present invention;

[0025] Figure 5 This is an exploded perspective view of the broadband dual-polarized magnetoelectric dipole antenna of the present invention.

[0026] Figure 6 This is a top view schematic diagram of the broadband dual-polarized magnetoelectric dipole antenna of the present invention;

[0027] Figure 7 This is a schematic diagram of the reflection coefficient of the broadband dual-polarized magnetoelectric dipole antenna of the present invention;

[0028] Figure 8 This is a schematic diagram showing the gain of the broadband dual-polarized magnetoelectric dipole antenna of the present invention;

[0029] Figure 9 This is a schematic diagram of the isolation curve of the broadband dual-polarized magnetoelectric dipole antenna of the present invention;

[0030] Figure 10 This is a schematic diagram of the radiation directions of the broadband magnetoelectric dipole antenna of the present invention at 22 GHz in the E-plane and H-plane.

[0031] Figure 11 This is a schematic diagram of the radiation directions of the broadband magnetoelectric dipole antenna of the present invention at 29 GHz in the E-plane and H-plane.

[0032] Figure 12This is a schematic diagram of the radiation directions of the broadband magnetoelectric dipole antenna of the present invention in the E-plane and H-plane at 35 GHz; the markings in the figure are: 1, first dielectric layer; 2, adhesive layer; 3, second dielectric layer; 4, metal ground layer; 5, magnetoelectric dipole element; 501, metal patch; 502, semi-elliptical chamfer; 503, magnetic dipole pillar; 504, gain patch; 6, dual polarization element; 601, Γ-shaped metal probe; 6011, metal sheet; 6012, long metal pillar; 6013, short metal pillar; 7, feed hole. Detailed Implementation

[0033] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0034] A magnetoelectric dipole antenna, similar to existing technologies, includes a first dielectric layer 1 and a second dielectric layer 3, wherein the first dielectric layer 1 and the second dielectric layer 3 are connected by an adhesive layer 2 to form an antenna substrate supporting the magnetoelectric dipole unit 5.

[0035] like Figure 1-3 As shown, unlike existing technologies, a magnetoelectric dipole unit 5 is provided on the upper surface of the first dielectric layer 1. The magnetoelectric dipole unit 5 includes four metal patches 501 evenly distributed in a ring on the upper side of the first dielectric layer 1. Magnetic dipole pillars 503 are provided at the inner corners of the opposite ends of the four metal patches 501. The metal patches 501 and magnetic dipole pillars 503 can serve as electric dipoles and magnetic dipoles respectively, forming a magnetoelectric dipole antenna with a large bandwidth for stable signal transmission. Simultaneously, gain patches 504 disposed on the first dielectric layer 1 are connected to the metal patches 501 to maintain the signal transmission gain of the magnetoelectric dipole antenna.

[0036] All four metal patches 501 are rectangular, and each of the four metal patches 501 has a semi-elliptical chamfer 502 on its two far apart sides. The two semi-elliptical chamfers 502 on the corresponding metal patches 501 are symmetrically arranged. The semi-elliptical chamfer 502 transforms the straight edges of the metal patches 501 into curved edges. Since curves provide a longer current path than straight lines, the semi-elliptical chamfer 502 widens the current flow path at the edges of the metal patches 501. A longer current path allows the antenna to effectively radiate and receive electromagnetic waves over a wider frequency range, thus widening the impedance bandwidth.

[0037] The surface of the metal patch 501 at the connection with the magnetic dipole 503 and the top surface of the magnetic dipole 503 are bonded together to ensure good current conduction performance. Furthermore, each magnetic dipole 503 has the same diameter, and the end of the magnetic dipole 503 facing away from the first dielectric layer 1 is located on the underside of the second dielectric layer 3, thus facilitating assembly and use by personnel and ensuring good working condition.

[0038] The gain patch 504 is circular, and it is connected to the outer edge of the first dielectric layer 1 opposite to the semi-elliptical chamfer 502. Eight gain patches 504 are provided, all located on the upper surface of the first dielectric layer 1. The placement of the gain patches 504 directly increases the physical size of the antenna, thereby expanding its effective radiating area to a certain extent. This increased effective radiating area also increases the amount of electromagnetic energy radiated, thus improving the antenna's full-band gain. The gain patch 504, in conjunction with the metal patch 501, can alter the current flow path, giving the antenna stronger radiation directivity. This ensures the antenna's gain stability and excellent radiation performance, providing strong technical support for the construction of 5G millimeter-wave communication systems.

[0039] The gain patch 504 is electromagnetically coupled to the corresponding metal patch 501, and the position and size of the gain patch 504 are changed to maximize the electromagnetic coupling effect. The electromagnetic coupling generated by the gain patch 504 and the corresponding metal patch 501 can change the current distribution on the surface of the first dielectric layer 1, thereby affecting the radiation mode of the antenna.

[0040] The present invention also provides a broadband dual-polarized magnetoelectric dipole antenna, such as... Figure 4-6 As shown, a magnetoelectric dipole antenna is provided, on which a dual-polarization unit 6 is provided. At the center of the first dielectric layer 1 and the second dielectric layer 3 of the dual-polarization unit 6, four metal patches 501 are arranged around it. The magnetoelectric dipole unit 5 cooperates with the dual-polarization unit 6 to perform dual-linear polarization radiation, thereby forming a broadband dual-polarization magnetoelectric dipole antenna to improve the bandwidth and gain of the magnetoelectric dipole antenna.

[0041] The dual polarization unit 6 includes two orthogonally arranged and mutually coupled Γ-shaped metal probes 601. The Γ-shaped metal probes 601 include a metal sheet 6011 and a long metal post 6012 and a short metal post 6013 disposed at both ends of the metal sheet 6011. The long metal post 6012 and the short metal post 6013 are both arranged vertically toward the metal grounding layer 4. One end of the long metal post 6012 toward the metal grounding layer 4 is disposed on the lower side of the second dielectric layer 3. The long metal post 6012, the short metal post 6013 and the metal sheet 6011 are all made of copper. One of the two Γ-shaped metal probes 601 is disposed on the first dielectric layer 1, that is, the metal piece 6011 of the corresponding Γ-shaped metal probe 601 is disposed longitudinally along the metal patch 501 on the side of the first dielectric layer 1 away from the metal ground layer 4, and the metal piece 6011 of the other Γ-shaped metal probe 601 is disposed transversely along the metal patch 501 on the side of the first dielectric layer 1 facing the metal ground layer 4. The two Γ-shaped metal probes 601 are orthogonally arranged and coupled to each other on the first dielectric layer 1, the second dielectric layer 3 and the metal ground layer 4 to achieve bilinear polarization radiation, thereby enabling the current signal of the magnetoelectric dipole antenna to achieve better isolation in the operating frequency band from 18.87GHz to 41.2GHz.

[0042] A metal ground layer 4 is provided below the second dielectric layer 3, and a feed hole 7 is provided on the metal ground layer 4. The feed hole 7 is connected to the dual-polarization unit 6. With the assistance of the metal ground layer 4, the feed hole 7 can feed the dual-polarization unit 6, thereby enabling the dual-polarization unit 6 to resonate with the magnetic dipole post 503 and widen the signal transmission bandwidth. Preferably, the feed hole 7 is connected to the long metal post 6012 of the Γ-shaped metal probe 601. The feed hole 7 can feed the Γ-shaped metal probe 601, thereby generating inductive and capacitive reactance between the Γ-shaped metal probe 601, the metal patch 501, and the magnetic dipole post 503, so that the three interact to generate resonance and widen the antenna bandwidth.

[0043] The specific dimensions for fabricating the antenna in this embodiment are provided below:

[0044] The first dielectric layer 1 and the second dielectric layer 3 have thicknesses of 0.254 mm and 1.016 mm, respectively, and both have a length and width L of 8 mm. They have a relative permittivity of 3.66 and are made of Rogers RO4350B board with a loss tangent of 0.004.

[0045] The adhesive layer 2 has a thickness of 0.2032 mm, a length and width of 8 mm, a relative permittivity of 4.3, and is made of Rogers RO4450F board with a loss tangent of 0.002.

[0046] The length and width of the metal patch 501 are both 1.9mm. The side spacing of the four metal patches 501 without the semi-elliptical chamfer 502 is 0.92mm. The diameter of each magnetic pillar 503 is 0.4mm. The center distance of the four magnetic pillars 503 is 1.47mm.

[0047] The gain patch 504 is circular and has a diameter of 0.8 mm. The distances from the center of the circular gain patch 504 to the two sides of the metal patch 501 without the semi-elliptical chamfer 502 are 2.34 mm and 1.64 mm, respectively.

[0048] The metal sheet 6011 of the Γ-type metal probe 601 is rectangular, with a length of 1.76 mm and a width of 0.54 mm. The long metal post 6012 and the short metal post 6013 of the Γ-type metal probe 601 both have a diameter of 0.4 mm.

[0049] The gain patch 504, the metal patch 501, the magnetic dipole 503, and the two Γ-shaped metal probes 601 are all made of copper.

[0050] The antenna fabricated according to the dimensions of this embodiment was tested for gain, isolation, and radiation direction in different frequency bands. The specific results are as follows:

[0051] like Figure 7 As shown, when excitation port one is excited, the reflection coefficient of the broadband dual-polarized magnetoelectric dipole antenna is less than -10dB in the frequency range of 18.87GHz to 41.2GHz, completely covering the Ka band, with a relative bandwidth of 75.8%; when excitation port two is excited, the reflection coefficient of the broadband dual-polarized magnetoelectric dipole antenna is less than -10dB in the frequency range of 18.45GHz to 40.5GHz, with a relative bandwidth of 76.0%.

[0052] like Figure 8 As shown, the broadband dual-polarized magnetoelectric dipole antenna of this embodiment has a gain of 7.56dB at the resonant frequency of 30GHz, and the gain remains at around 7dBi throughout the entire operating frequency band.

[0053] like Figure 9 As shown, in this embodiment, the antenna maintains an isolation of approximately -20dB throughout the entire operating frequency band.

[0054] like Figure 10As shown, in this embodiment, the antenna has a gain of 6.5 dBi at the top of the E-plane main polarization at 23 GHz, a gain of -11.6 dBi at the top of the cross-polarization, and a main lobe width of 94 degrees with a 3 dB main polarization. In the H-plane, the gain is 6.52 dBi at the top of the main polarization, a gain of -11.6 dBi at the top of the cross-polarization, and a main lobe width of 93° with a 3 dB main polarization, exhibiting good consistency in both the E-plane and H-plane.

[0055] like Figure 11 As shown, the antenna in this embodiment has a gain of 6.9 dBi at the top of the E-plane main polarization at 29 GHz, a gain of -13.0 dBi at the top of the cross-polarization, and a main lobe width of 88 degrees with 3 dB of main polarization. In the H-plane, the gain is 6.91 dBi at the top of the main polarization, a gain of -12.98 dBi at the top of the cross-polarization, and a main lobe width of 90° with 3 dB of main polarization. Both the E-plane and H-plane exhibit good consistency.

[0056] like Figure 12 As shown, in this embodiment, at a frequency of 35 GHz, the antenna has a gain of 6.96 dBi at the top of the E-plane main polarization and -21.56 dBi at the top of the cross-polarization, with a main lobe width of 54 degrees for 3 dB of main polarization. In the H-plane, the gain is 6.95 dBi at the top of the main polarization and 21.46 dBi at the top of the cross-polarization, with a main lobe width of 44° for 3 dB of main polarization. Both the E-plane and H-plane exhibit good consistency.

[0057] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A magnetoelectric dipole antenna, comprising a first dielectric layer (1) and a second dielectric layer (3) disposed below the first dielectric layer (1), wherein the first dielectric layer (1) and the second dielectric layer (3) are connected by an adhesive layer (2) to serve as an antenna substrate supporting a magnetoelectric dipole unit (5), characterized in that: The magnetoelectric dipole unit (5) includes a metal patch (501) and a magnetic dipole pillar (503) for use as an electric dipole and a magnetic dipole. The magnetic dipole pillar (503) passes through the first dielectric layer (1) and is disposed on the lower side of the second dielectric layer (3). The metal patch (501) is provided in four and is uniformly disposed in a ring on the upper side of the first dielectric layer (1). The shape of the metal patch (501) is a rectangle with semi-elliptical chamfers (502) on both sides of its outer edge; Each of the metal patches (501) is coupled with two gain patches (504) disposed on the first dielectric layer (1), and the gain patches (504) are circular; The gain patch (504) is symmetrically disposed at the outer ends of the two semi-elliptical chamfers (502) of the metal patch (501), and the gain patch (504) does not contact the side of the metal patch (501).

2. A magnetoelectric dipole antenna as claimed in claim 1, characterized in that: The upper end of the magnetic dipole (503) is located at the apex of the metal patch (501) facing inward.

3. A magnetoelectric dipole antenna as claimed in claim 1 or 2, characterized in that: The four magnetic dipoles (503) have the same outer diameter and are arranged symmetrically. All four magnetic dipoles (503) are made of copper.

4. A magneto-dipole antenna as claimed in claim 1, characterized in that: The surface of the metal patch (501) at the connection with the magnetic column (503) is bonded to the top surface of the magnetic column (503).

5. A magneto-dipole antenna as claimed in claim 1, characterized in that: Both the metal patch (501) and the gain patch (504) are made of copper.

6. A wideband dual-polarized magneto-electric dipole antenna, characterized by: The invention includes a magnetoelectric dipole antenna according to any one of claims 1-5, wherein the magnetoelectric dipole antenna is provided with a dual polarization unit (6), the dual polarization unit (6) includes two orthogonally arranged and mutually coupled Γ-shaped metal probes (601), the two Γ-shaped metal probes (601) are located at the center of four metal patches (501) for resonant dual-polarization radiation.

7. A wideband dual polarized magneto-electric dipole antenna according to claim 6, wherein: The second dielectric layer (3) has a metal ground layer (4) on its lower side. A Γ-shaped metal probe (601) is connected to a feed hole (7) on the metal ground layer (4) so ​​that the metal ground layer (4) feeds the dual polarization unit (6) and drives the metal patch (501) to resonate with the magnetic dipole (503).

8. A wideband dual polarized magneto-electric dipole antenna according to claim 6, wherein: The two Γ-shaped metal probes (601) are respectively disposed on the upper side and the lower side of the first dielectric layer (1), and the two Γ-shaped metal probes (601) are respectively disposed in the transverse and longitudinal directions of the first dielectric layer (1).

9. A wideband dual polarized magneto-electric dipole antenna according to claim 8, wherein: The Γ-shaped metal probe (601) includes a metal sheet (6011) arranged horizontally or vertically. The metal sheet (6011) is located on the upper or lower side of the first dielectric layer (1). The two ends of the metal sheet (6011) facing the first dielectric layer (1) are respectively provided with a long metal column (6012) and a short metal column (6013). The long metal column (6012) passes through the adhesive layer (2) and is located on the lower side of the second dielectric layer (3). The short metal column (6013) is located in the adhesive layer (2) or passes through the adhesive layer (2) and is located in the second dielectric layer (3).

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