Broadband dual-polarization magnetoelectric dipole antenna

Abstract

The broadband dual-polarization magnetoelectric dipole antenna comprises a first dielectric layer and a second dielectric layer arranged below the first dielectric layer, and the first dielectric layer and the second dielectric layer are connected through a bonding layer to serve as an antenna substrate for supporting a magnetoelectric dipole unit. The magnetoelectric dipole unit comprises metal patches and magnetic dipoles, the metal patches and the magnetic dipoles are used as electric dipoles and magnetic dipoles, the magnetic dipoles penetrate through the first dielectric layer and are arranged on the lower side of the second dielectric layer, and the four metal patches are annularly and uniformly arranged on the upper side face of the first dielectric layer; the shape of the metal patch is a rectangle with semi-elliptical chamfers on two side edges of the outer edge; any metal patch is coupled with two gain patches arranged on the first dielectric layer, and the gain patches are circular. The problem that in the prior art, a magnetoelectric dipole antenna is poor in impedance bandwidth capacity, and therefore the requirement of people for the network information transmission speed cannot be met is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a broadband dual-polarized magnetoelectric dipole antenna. Background Art

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

[0003] Existing magnetoelectric dipole antennas have poor impedance bandwidth, that is, poor ability to effectively transmit and receive signals within a specific frequency range. Therefore, existing magnetoelectric dipole antennas cannot meet people's growing demand for network information transmission speed to a certain extent, and also create certain obstacles to the construction of 5G millimeter wave communication systems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the impedance bandwidth capability of the magnetoelectric dipole antenna in the prior art is poor and thus cannot meet people's demand for network information transmission speed, and to provide a broadband dual-polarized magnetoelectric dipole antenna.

[0005] The present invention solves the above-mentioned technical problems and adopts the following technical solutions: a magneto-electric dipole antenna, comprising a first dielectric layer and a second dielectric layer arranged 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 magneto-electric dipole unit, wherein the magneto-electric dipole unit comprises a metal patch and a magnetic pole used as an electric dipole and a magnetic dipole, wherein the magnetic pole passes through the first dielectric layer and is arranged on the lower side of the second dielectric layer, and four metal patches are arranged uniformly in an annular shape on the upper side of the first dielectric layer;

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

[0007] Any of the metal patches is coupled with two gain patches arranged 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 is arranged at the inward vertex corner of the metal patch.

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

[0010] As a further optimization of the magnetoelectric dipole antenna of the present invention: the surface of the connection between the metal patch and the magnetic pole is in contact with the top surface of the magnetic pole.

[0011] As a further optimization of the magnetoelectric dipole antenna of the present invention: the gain patch is symmetrically arranged at the outer edge end points of two semi-elliptical cut corners 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: the metal patch and the gain patch are both made of metal copper.

[0013] A broadband dual-polarized magnetoelectric dipole antenna, comprising any one of the magnetoelectric dipole antennas described in claims 1-6, wherein a dual-polarization unit is provided on the magnetoelectric dipole antenna, wherein the dual-polarization unit comprises two Γ-shaped metal probes which are orthogonally arranged and coupled to each other, and wherein the two Γ-shaped metal probes are arranged at the center of four metal patches for resonant dual-linear polarization radiation.

[0014] As a further optimization of the broadband dual-polarized magneto-electric 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 feeding hole provided on the metal grounding layer so that the metal grounding layer feeds the dual-polarization unit, driving the metal patch to resonate with the magnetic dipole.

[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 arranged on the upper side and the lower side of the first dielectric layer, and the two Γ-shaped metal probes are respectively arranged horizontally and vertically along 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 horizontally or vertically, the metal sheet is arranged on the upper side or the lower side of the first dielectric layer, and a long metal column and a short metal column are respectively arranged on the side facing the first dielectric layer at both ends of the metal sheet, the long metal column passes through the adhesive layer and is arranged on the lower side of the second dielectric layer, and the short metal column is arranged in the adhesive layer or passes through the adhesive layer and is arranged in the second dielectric layer.

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

[0018] The present invention changes the path of the current passing through the metal patch by setting a semi-elliptical cut angle on the metal patch, thereby improving the working bandwidth of the magnetoelectric dipole unit. At the same time, a circular gain patch is set at the outer edge end of the semi-elliptical cut angle of the metal patch, increasing the physical size of the metal patch and changing the current distribution on its periphery to improve the signal transmission gain.

[0019] Furthermore, by providing a dual-polarization unit and four metal patches surrounding the dual-polarization unit, the magneto-electric dipole unit cooperates with the dual-polarization unit to achieve dual-linear polarization radiation, and then the magneto-electric dipole unit and the dual-polarization unit form a dual-polarization magneto-electric dipole antenna, so as to have a high bandwidth within the working frequency band.

[0020] In addition, a metal grounding layer and a Γ-shaped metal probe connected to the feeding hole on the metal grounding layer are provided to feed the Γ-shaped metal probe, thereby causing the Γ-shaped metal probe to generate inductive reactance and capacitive reactance with the metal patch and the magnetic pole, so that the three interact to generate resonance and broaden the frequency band of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the electric dipole antenna of the present invention; Figure 2 It is a schematic diagram of an exploded perspective structure of an electric dipole antenna of the present invention; Figure 3 Schematic diagram of the top view of the electric dipole antenna of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the broadband dual-polarized magneto-electric dipole antenna of the present invention; Figure 5 It is an exploded perspective structural schematic diagram of the broadband dual-polarized magneto-electric dipole antenna of the present invention; Figure 6 It is a schematic diagram of the top view of the structure of the broadband dual-polarized magneto-electric dipole antenna of the present invention; Figure 7 It is a schematic diagram of the reflection coefficient of the broadband dual-polarized magneto-electric dipole antenna of the present invention; Figure 8 Schematic diagram of gain of the broadband dual-polarized magneto-electric dipole antenna of the present invention; Fig. 9 It is a schematic diagram of the isolation curve of the broadband dual-polarized magneto-electric dipole antenna of the present invention; Fig.10 It is a schematic diagram of the radiation direction of the E-plane and the H-plane of the broadband magnetoelectric dipole antenna of the present invention at 22GHz; Fig.11 It is a schematic diagram of the radiation direction of the E-plane and the H-plane of the broadband magnetoelectric dipole antenna of the present invention at 29 GHz; Fig.12 The present invention is a schematic diagram of the radiation direction of the E-plane and the H-plane of the broadband magnetoelectric dipole antenna at 35 GHz; the markings in the figure are: 1, the first dielectric layer; 2, the adhesive layer; 3, the second dielectric layer; 4, the metal grounding layer; 5, the magnetoelectric dipole unit; 501, the metal patch; 502, the semi-elliptical cut corner; 503, the magnetic dipole column; 504, the gain patch; 6, the dual-polarization unit; 601, the Γ-shaped metal probe; 6011, the metal sheet; 6012, the long metal column; 6013, the short metal column; 7, the feeding hole. DETAILED DESCRIPTION

[0022] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0023] A magnetoelectric dipole antenna, similar to the prior art, comprises a first dielectric layer 1 and a second dielectric layer 3. The first dielectric layer 1 and the second dielectric layer 3 form an antenna substrate supporting a magnetoelectric dipole unit 5 through an adhesive layer 2.

[0024] like Figure 1-3 As shown, what is different from the prior art is that a magneto-electric dipole unit 5 is provided on the upper surface of the first dielectric layer 1, and the magneto-electric dipole unit 5 includes four metal patches 501 evenly distributed and arranged in a ring on the side of the first dielectric layer 1, and magnetic poles 503 are provided at the inner corners of the opposite ends of the four metal patches 501. The metal patches 501 and the magnetic poles 503 can be used as electric dipoles and magnetic dipoles respectively to form a magneto-electric dipole antenna with a larger bandwidth for stable signal transmission. At the same time, a gain patch 504 provided on the first dielectric layer 1 is connected to the metal patch 501 to maintain the signal transmission gain of the magneto-electric dipole antenna.

[0025] The four metal patches 501 are all rectangular, and two sides of the four metal patches 501 that are away from each other are provided with semi-elliptical cut corners 502, and the two semi-elliptical cut corners 502 provided on the corresponding metal patches 501 are symmetrically arranged. The semi-elliptical cut corners 502 transform the straight edge of the metal patch 501 into a curved edge, and the curve can provide a longer current path than the straight line, so the semi-elliptical cut corners 502 widen the current flow path at the edge of the metal patch 501. The longer current path enables the antenna to effectively radiate and receive electromagnetic waves in a wider frequency range, that is, widen the impedance bandwidth.

[0026] The surface of the connection between the metal patch 501 and the magnetic pole 503 is in contact with the top surface of the magnetic pole 503, so that both have better current conduction performance. The diameter of each magnetic pole 503 is equal, and the end of the magnetic pole 503 away from the first dielectric layer 1 is arranged at the lower side of the second dielectric layer 3, so that it is convenient for the staff to assemble and use and maintain a good working condition.

[0027] The gain patch 504 is arranged in a circular shape, and the gain patch 504 is connected to the outer edge end point of the semi-elliptical cut corner 502 away from the first dielectric layer 1, that is, eight gain patches 504 are arranged, and the eight gain patches 504 are arranged on the upper surface of the first dielectric layer 1. The arrangement of the gain patch 504 directly increases the physical size of the antenna, thereby expanding the effective radiation area of ​​the antenna to a certain extent. The increase in the effective radiation area also increases the amount of electromagnetic energy radiated, thereby increasing the full-band gain of the antenna. The gain patch 504 can cooperate with the metal patch 501 to change the current flow path so that the antenna has a stronger radiation directivity, thereby ensuring the gain stability and excellent radiation performance of the antenna, that is, it can provide strong technical support for the construction of 5G millimeter wave communication systems.

[0028] The gain patch 504 is electromagnetically coupled with 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 corresponding to the 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.

[0029] The present invention also provides a broadband dual-polarized magneto-electric dipole antenna, such as Figure 4-6 As shown, it includes a magnetoelectric dipole antenna, on which a dual-polarization unit 6 is provided. The dual-polarization unit 6 is located at the center of the first dielectric layer 1 and the second dielectric layer 3, so that 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, that is, a broadband dual-polarization magnetoelectric dipole antenna is formed to improve the bandwidth and gain of the magnetoelectric dipole antenna.

[0030] The dual-polarization unit 6 includes two orthogonally arranged and mutually coupled Γ-shaped metal probes 601, the Γ-shaped metal probe 601 includes a metal sheet 6011 and a long metal column 6012 and a short metal column 6013 arranged at both ends of the metal sheet 6011, the long metal column 6012 and the short metal column 6013 are both arranged vertically toward the metal grounding layer 4, and one end of the long metal column 6012 facing the metal grounding layer 4 is arranged on the lower side of the second dielectric layer 3, and the long metal column 6012, the short metal column 6013 and the metal sheet 6011 are all made of metal copper. One of the two Γ-shaped metal probes 601 is arranged on the first dielectric layer 1, that is, the metal sheet 6011 of the corresponding Γ-shaped metal probe 601 is arranged along the metal patch 501 in the longitudinal direction, on the side surface of the first dielectric layer 1 away from the metal grounding layer 4, and the metal sheet 6011 in the other Γ-shaped metal probe 601 is arranged along the metal patch 501 in the transverse direction, on the side surface of the first dielectric layer 1 facing the metal grounding layer 4. Even if the two Γ-shaped metal probes 601 are orthogonally arranged and coupled to the first dielectric layer 1, the second dielectric layer 3 and the metal grounding layer 4 to realize dual-linear polarized radiation, the current signal of the magnetoelectric dipole antenna can be better isolated within the operating frequency band of 18.87 GHz to 41.2 GHz.

[0031] A metal grounding layer 4 is provided below the second dielectric layer 3, and a feeding hole 7 is provided on the metal grounding layer 4, and the feeding hole 7 is connected to the dual-polarization unit 6. With the assistance of the metal grounding layer 4, the feeding hole 7 can feed the dual-polarization unit 6, thereby causing the dual-polarization unit 6 to resonate with the magnetic pole 503 to widen the frequency band of signal transmission. Preferably, the feeding hole 7 is connected to the long metal pole 6012 of the Γ-shaped metal probe 601. The feeding hole 7 can feed the Γ-shaped metal probe 601, thereby causing the inductive reactance and the capacitive reactance to be generated between the Γ-shaped metal probe 601, the metal patch 501 and the magnetic pole 503, so that the three interact with each other to generate resonance to widen the frequency band of the antenna.

[0032] The specific dimensions for preparing the antenna of this embodiment are provided below:

[0033] The first dielectric layer 1 and the second dielectric layer 3 have thicknesses of 0.254 mm and 1.016 mm respectively, length and width L of 8 mm, relative dielectric constant of 3.66, and are made of Rogers RO4350B sheet material with a loss tangent value of 0.004.

[0034] The thickness of the adhesive layer 2 is 0.2032 mm, the length and width are both 8 mm, the relative dielectric constant is 4.3, and it is made of Rogers RO4450F sheet material with a loss tangent value of 0.002.

[0035] The length and width of the metal patch 501 are both 1.9 mm, the side spacing of the four metal patches 501 without the semi-elliptical cut corners 502 is 0.92 mm, the diameter of each magnetic pole 503 is 0.4 mm, and the center distance of the four magnetic poles 503 is 1.47 mm.

[0036] The gain patch 504 is circular, and the diameter of the gain patch 504 is 0.8 mm. The distances between the center of the circular gain patch 504 and the two sides of the metal patch 501 without the semi-elliptical cut corners 502 are 2.34 mm and 1.64 mm respectively.

[0037] The metal sheet 6011 of the Γ-shaped metal probe 601 is rectangular, with a length of 1.76 mm and a width of 0.54 mm. The diameters of the long metal column 6012 and the short metal column 6013 of the Γ-shaped metal probe 601 are both 0.4 mm.

[0038] The gain patch 504 , the metal patch 501 , the magnetic pole 503 and the two Γ-shaped metal probes 601 are all made of copper.

[0039] The antenna prepared 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:

[0040] like Figure 7 As shown, when excitation port one is excited, the reflection coefficient of the broadband dual-polarized magneto-electric dipole antenna is less than -10dB in the frequency range of 18.87GHz to 41.2GHz, completely covering the Ka band, and the relative bandwidth is 75.8%; when excitation port two is excited, the reflection coefficient of the broadband dual-polarized magneto-electric dipole antenna is less than -10dB in the frequency range of 18.45GHz to 40.5GHz, and the relative bandwidth is 76.0%.

[0041] like Figure 8As shown, the broadband dual-polarized magneto-electric dipole antenna gain of the antenna of this embodiment at the resonant frequency of 30 GHz is 7.56 dB, and the gain is maintained at about 7 dBi in the entire working frequency band.

[0042] like Fig. 9 As shown, the antenna of this embodiment maintains an isolation of about -20 dB in the entire working frequency band.

[0043] like Fig.10 As shown, at the frequency of 23 GHz, the antenna of this embodiment has a gain of 6.5 dBi at the top of the main polarization of the E plane, a gain of -11.6 dBi at the top of the cross polarization, and a main lobe width of 94 degrees at 3 dB of the main polarization. In the H plane, the gain of the main polarization at the top is 6.52 dBi, the gain of the cross polarization at the top is -11.6 dBi, and the main lobe width of 93 degrees at the main polarization is 3 dB, and has good consistency in both the E plane and the H plane.

[0044] like Fig.11 As shown, the antenna of the embodiment has a gain of 6.9dBi at the top of the E-plane main polarization, a gain of -13.0dBi at the top of the cross polarization, and a main lobe width of 88 degrees at 3dB of the main polarization at a frequency of 29GHz. The gain of 6.91dBi at the top of the H-plane main polarization, a gain of -12.98dBi at the top of the cross polarization, and a main lobe width of 90° at 3dB of the main polarization, and both the E-plane and the H-plane have good consistency.

[0045] like Fig.12 As shown, at the frequency of 35 GHz, the antenna of this embodiment has an E-plane main polarization gain of 6.96 dBi at the top, a cross-polarization gain of -21.56 dBi at the top, and a main lobe width of 3 dB of the main polarization of 54 degrees. The H-plane main polarization gain is 6.95 dBi at the top, the cross-polarization gain is 21.46 dBi at the top, and the main lobe width of 3 dB of the main polarization is 44°, and both the E-plane and the H-plane have good consistency.

[0046] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may 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 via an adhesive layer (2) to serve as an antenna substrate supporting a magnetoelectric dipole unit (5), characterized in that: The magneto-electric dipole unit (5) comprises a metal patch (501) and a magnetic pole (503) used as an electric dipole and a magnetic dipole, the magnetic pole (503) passing through the first dielectric layer (1) and arranged on the lower side of the second dielectric layer (3), and four metal patches (501) are arranged evenly in an annular shape on the upper side of the first dielectric layer (1); The shape of the metal patch (501) is a rectangle with semi-elliptical cut corners (502) on both sides of the outer edge; Any of the metal patches (501) is coupled with two gain patches (504) arranged on the first dielectric layer (1), and the gain patches (504) are circular.

2. A magnetoelectric dipole antenna as claimed in claim 1, characterized in that: The upper end of the magnetic pole (503) is arranged at the inwardly facing top corner of the metal patch (501).

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

4. A magnetoelectric dipole antenna as claimed in claim 1, characterized in that: The surface of the connection between the metal patch (501) and the magnetic pole (503) is in contact with the top surface of the magnetic pole (503).

5. The magnetoelectric dipole antenna according to claim 1, characterized in that: The gain patch (504) is symmetrically arranged at the outer edge end points of two semi-elliptical cut corners (502) of the metal patch (501), and the gain patch (504) does not contact the side of the metal patch (501).

6. A magnetoelectric dipole antenna as claimed in claim 1, characterized in that: The metal patch (501) and the gain patch (504) are both made of metal copper.

7. A broadband dual-polarized magneto-electric dipole antenna, characterized in that: The invention comprises any one of the magnetoelectric dipole antennas described in claims 1 to 6, wherein a dual-polarization unit (6) is provided on the magnetoelectric dipole antenna, wherein the dual-polarization unit (6) comprises two orthogonally arranged and mutually coupled Γ-shaped metal probes (601), and the two Γ-shaped metal probes (601) are arranged at the center of four metal patches (501) for resonant dual-linear polarization radiation.

8. A broadband dual-polarized magneto-electric dipole antenna as claimed in claim 7, characterized in that: A metal grounding layer (4) is provided on the lower side of the second dielectric layer (3), and a Γ-shaped metal probe (601) is connected to a feeding hole (7) provided on the metal grounding layer (4), so that the metal grounding layer (4) feeds the dual-polarization unit (6) to drive the metal patch (501) and the magnetic dipole (503) to resonate.

9. A broadband dual-polarized magneto-electric dipole antenna as claimed in claim 7, characterized in that: The two Γ-shaped metal probes (601) are respectively arranged on the upper side and the lower side of the first dielectric layer (1), and the two Γ-shaped metal probes (601) are respectively arranged along the transverse direction and the longitudinal direction of the first dielectric layer (1).

10. A broadband dual-polarized magneto-electric dipole antenna as claimed in claim 9, characterized in that: The Γ-shaped metal probe (601) comprises a metal sheet (6011) arranged horizontally or vertically, the metal sheet (6011) being arranged on the upper side or the lower side of the first dielectric layer (1), and a long metal column (6012) and a short metal column (6013) being arranged on the two ends of the metal sheet (6011) facing the first dielectric layer (1), respectively; the long metal column (6012) passes through the adhesive layer (2) and is arranged on the lower side of the second dielectric layer (3), and the short metal column (6013) is arranged in the adhesive layer (2) or passes through the adhesive layer (2) and is arranged in the second dielectric layer (3).

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