Low profile broadband high isolation magneto-electric dipole antenna and wireless communication device

Abstract

The invention discloses a low-profile broadband high-isolation magnetoelectric dipole antenna and wireless communication equipment, wherein the antenna comprises a radiation patch, a first metal column, a microstrip line feeding network, a slot microstrip line feeding network, a supporting dielectric plate, a dielectric plate and a metal floor, wherein the metal floor is arranged on the upper surface of the dielectric plate, the radiation patch is arranged on the upper surface of the supporting dielectric plate, and the first metal column connects the radiation patch to the metal floor; the microstrip line feeding network comprises a first microstrip line group, a second microstrip line group and a second metal column, wherein the first microstrip line group is arranged on the lower surface of the dielectric plate, the second microstrip line group is arranged on the upper surface of the supporting dielectric plate, and the first microstrip line group and the second microstrip line group are connected through the second metal column; the slot microstrip line feeding network comprises a third microstrip line group and a slot groove, wherein the third microstrip line group is arranged on the lower surface of the supporting dielectric plate, and the slot groove is opened on the metal floor. The invention has the advantages of broadband, high isolation and low profile.

Description

Technical Field

[0001] The invention relates to a magnetoelectric dipole antenna, in particular to a low-profile, broadband, high-isolation magnetoelectric dipole antenna and wireless communication equipment, belonging to the technical field of wireless communication. Background Art

[0002] Low-profile broadband high-isolation magnetoelectric dipole for full-duplex applications In social communication systems, antennas are defined as the part that radiates or receives electromagnetic waves in the transmitting or receiving system. They are a converter between circuit signals and space-radiated electromagnetic waves. It can be said that antennas have built a bridge for the exchange of information between things. All information transmission using electromagnetic waves must rely on antennas, so antennas are an important part of mobile communication systems. With the development of society and the continuous updating and iteration of antenna technology, the performance requirements of communication systems for antennas will inevitably continue to increase, requiring antennas to transmit more data in a shorter time. Antennas with higher frequency band coverage are therefore widely used in high-speed communications. Magnetoelectric dipole antennas have advantages such as higher bandwidth, lower cross-polarization and better radiation directivity, and are particularly suitable for wireless mobile communication systems and have good development prospects.

[0003] Most magnetoelectric dipole antennas have a profile height of about 0.25λ0, which is relatively high among many antenna types. This shortcoming also limits the application scenarios of magnetoelectric dipole antennas. Therefore, reducing the profile height of the antenna has become a difficult problem that needs to be overcome.

[0004] Full-duplex antennas have become popular in recent years because of their better communication performance. However, in order to avoid mutual coupling between the two ports, which causes the channels to affect each other and thus reduce the overall working efficiency of the full-duplex antenna, it is necessary to improve the isolation between the two ports. This has also become a difficulty that needs to be overcome in the full-duplex application of magnetoelectric dipoles. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a low-profile broadband high-isolation magneto-electric dipole antenna, which has the advantages of wide bandwidth, high isolation and low profile.

[0006] Another object of the present invention is to provide a wireless communication device comprising the above-mentioned low-profile, broadband, high-isolation magneto-electric dipole antenna.

[0007] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0008] A low-profile broadband high-isolation magnetoelectric dipole antenna, comprising a radiation patch, a first metal column, a microstrip line feeding network, a slot microstrip line feeding network, a supporting dielectric plate, a dielectric plate and a metal floor, wherein the metal floor is arranged on the upper surface of the dielectric plate, the radiation patch is arranged on the upper surface of the supporting dielectric plate, the first metal column connects the radiation patch and the metal floor to form a magnetoelectric dipole, and the microstrip line feeding network and the slot microstrip line feeding network form vertical and horizontal polarization;

[0009] The microstrip line feeding network comprises a first microstrip line group, a second microstrip line group and a second metal column, wherein the first microstrip line group is arranged on the lower surface of the dielectric plate, the second microstrip line group is arranged on the upper surface of the supporting dielectric plate, and the first microstrip line group and the second microstrip line group are connected via the second metal column;

[0010] The slot microstrip line feeding network comprises a third microstrip line group and a slot groove, wherein the third microstrip line group is arranged on the lower surface of the dielectric plate, and the slot groove is opened on the metal floor.

[0011] Furthermore, the radiation patch includes four horizontally placed metal patches, the first metal columns are four groups, the four metal patches correspond one to one with the four groups of first metal columns, and each metal patch is connected to the metal floor through a corresponding group of first metal columns.

[0012] Furthermore, each metal patch is a square structure, and three corners of each metal patch are provided with two symmetrical arc-shaped grooves and one triangular groove.

[0013] Furthermore, there are two second metal pillars, and there are two second microstrip line groups, the two second metal pillars correspond to the two second microstrip line groups one by one, and each second microstrip line group is connected to the first microstrip line group through the corresponding second metal pillar;

[0014] The four groups of first metal pillars are respectively a first group of metal pillars, a second group of metal pillars, a third group of metal pillars and a fourth group of metal pillars. The first group of metal pillars and the second group of metal pillars each include six vertical metal pillars. The third group of metal pillars and the fourth group of metal pillars each include five vertical metal pillars. One second metal pillar is located between two metal pillars of the third group of metal pillars, and another second metal pillar is located between two metal pillars of the fourth group of metal pillars.

[0015] Furthermore, among the first group of metal pillars and the second group of metal pillars, three metal pillars are arranged side by side, and their upper ends are close to the first edge of the corresponding metal patch, and the other three metal pillars are arranged side by side, and their upper ends are close to the second edge of the corresponding metal patch;

[0016] In the third group of metal pillars and the fourth group of metal pillars, two metal pillars with the second metal pillar between them are arranged side by side, and their upper ends are close to the first edge of the corresponding metal patch, and the other three metal pillars are arranged side by side, and their upper ends are close to the second edge of the corresponding metal patch;

[0017] Wherein, the first edge is perpendicular to the second edge.

[0018] Further, the first microstrip line group includes a first section microstrip line, a second section microstrip line, a third section microstrip line, a fourth section microstrip line and a fifth section microstrip line, the second section microstrip line and the third section microstrip line constitute a pair of microstrip lines, the fourth section microstrip line and the fifth section microstrip line constitute a pair of microstrip lines, there are two second metal pillars, there are two second microstrip line groups, and the two second metal pillars correspond to the two second microstrip line groups one by one;

[0019] One end of the first microstrip line is connected to the first feeding input port, the other end of the first microstrip line is respectively connected to one end of the second microstrip line and one end of the third microstrip line to form a T-type power divider, the other end of the second microstrip line is connected to one end of the fourth microstrip line, the other end of the third microstrip line is connected to one end of the fifth microstrip line, the other end of the fourth microstrip line is connected to a corresponding group of second microstrip line groups through one of the second metal pillars, and the other end of the fifth microstrip line is connected to a corresponding group of second microstrip line groups through another second metal pillar.

[0020] Furthermore, the second microstrip line group includes a sixth microstrip line and a seventh microstrip line, one end of the sixth microstrip line is connected to the first microstrip line group through a second metal column, and the other end of the sixth microstrip line is connected to the middle of the seventh microstrip line.

[0021] Furthermore, the third microstrip line group includes an eighth microstrip line, a ninth microstrip line and a tenth microstrip line, one end of the eighth microstrip line is connected to the second feeding input port, the other end of the eighth microstrip line is connected to one end of the ninth microstrip line, the other end of the ninth microstrip line is connected to one end of the tenth microstrip line, and the other end of the tenth microstrip line is connected to the slot.

[0022] Furthermore, the length of the ninth microstrip line is greater than the lengths of the eighth microstrip line and the tenth microstrip line, and the width of the ninth microstrip line is greater than the widths of the eighth microstrip line and the tenth microstrip line.

[0023] Another object of the present invention can be achieved by adopting the following technical solutions:

[0024] A wireless communication device comprises the low-profile, broadband, high-isolation magneto-electric dipole antenna.

[0025] The present invention has the following beneficial effects compared with the prior art:

[0026] The working frequency band of the antenna of the present invention is 1.71GHz-2.70GHz, and its working frequency band is relatively wide, and the relative impedance bandwidth is 44.9%. The antenna has good radiation characteristics, stable directivity, front-to-back ratio greater than 12dB, cross polarization less than -27dB, dual-polarization gain higher than 7.2dBi, and a profile as small as 0.14λ0. It is an antenna with low profile characteristics, and by using vertical and horizontal polarization, increasing the spacing between feed lines, etc., the current coupling between the two ports of dual polarization is extremely small, so that the isolation |S 12 |Greater than 44.5dB. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional structural diagram of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0029] Figure 2 It is a three-dimensional structural diagram of a low-profile, broadband, high-isolation magneto-electric dipole antenna with a hidden radiation patch according to an embodiment of the present invention.

[0030] Figure 3 It is a three-dimensional structural diagram of the radiation patch of the low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0031] Figure 4 It is a three-dimensional structural diagram of a microstrip line feeding network of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0032] Figure 5 It is a planar structural diagram of a slotted microstrip line feeding network of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0033] Figure 6 1. A top-down dimensional diagram of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0034] Figure 7 It is a side dimensional diagram of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0035] Figure 8A three-dimensional dimension diagram of a microstrip line feeding network of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0036] Fig. 9 A planar dimension diagram of a slotted microstrip line feeding network of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0037] Fig.10 It is an S parameter curve diagram of the low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0038] Fig.11 Graph showing a gain curve of a low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0039] Figure 12a to Figure 12b Horizontal plane radiation patterns of different port inputs at the same center frequency of the low-profile, broadband, high-isolation magneto-electric dipole antenna according to an embodiment of the present invention.

[0040] Figure 13a to Figure 13b The vertical radiation pattern of the low-profile broadband high-isolation magneto-electric dipole antenna of the embodiment of the present invention at different port inputs at the same center frequency.

[0041] Among them, 100-radiation patch, 101-first metal patch, 102-second metal patch, 103-third metal patch, 104-fourth metal patch, 200-first metal column, 201-first group of metal columns, 202-second group of metal columns, 203-third group of metal columns, 204-fourth group of metal columns, 300-microstrip line feeding network, 301-first feeding input port, 302-first section of microstrip line, 303-second section of microstrip line, 304-third Section microstrip line, 305-fourth section microstrip line, 306-fifth section microstrip line, 307-second metal column, 308-metal circular surface, 309-sixth section microstrip line, 310-seventh section microstrip line, 400-slot microstrip line feeding network, 401-second feeding input port, 402-eighth section microstrip line, 403-ninth section microstrip line, 404-tenth section microstrip line, 405-slot groove, 500-support dielectric plate, 600-dielectric plate, 700-metal floor. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] Example:

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides a low-profile broadband high-isolation magnetoelectric dipole antenna, which can be applied to various wireless communication devices to achieve full-duplex communication. The antenna includes a radiation patch 100, a first metal column 200, a microstrip line feeding network 300, a slot microstrip line feeding network 400, a supporting dielectric plate 500, a dielectric plate 600 and a metal floor 700. The supporting dielectric plate 500 and the dielectric plate 600 are both square structures. The metal floor 700 is arranged on the upper surface of the dielectric plate 600. The thickness of the metal floor 700 is 0.05 mm. The radiation patch 100 is arranged on the upper surface of the supporting dielectric plate 500. The first metal column 200 is a cylindrical structure. The first metal column 200 connects the radiation patch 100 with the metal floor 700 to form a magnetoelectric dipole. The microstrip line feeding network 300 and the slot microstrip line feeding network 400 form vertical horizontal polarization.

[0045] like Figure 1 to Figure 3 As shown, the radiation patch 100 of this embodiment includes four horizontally placed metal patches, which are respectively a first metal patch 101, a second metal patch 102, a third metal patch 103 and a fourth metal patch 104. Correspondingly, the first metal pillars 200 are four groups, and the four groups of first metal pillars are respectively a first group of metal pillars 201, a second group of metal pillars 202, a third group of metal pillars 203 and a fourth group of metal pillars 204. The first metal patch 101 is connected to the metal floor 700 through the first group of metal pillars 201, the second metal patch 102 is connected to the metal floor 700 through the second group of metal pillars 202, the third metal patch 103 is connected to the metal floor 700 through the third group of metal pillars 203, and the fourth metal patch 104 is connected to the metal floor 700 through the fourth group of metal pillars 204.

[0046] Furthermore, the first metal patch 101, the second metal patch 102, the third metal patch 103 and the fourth metal patch 104 are all square structures, and two symmetrical arc-shaped grooves and one triangular groove are opened on the three corners of the first metal patch 101, the second metal patch 102, the third metal patch 103 and the fourth metal patch 104, wherein the triangular groove is located at the corner of the supporting medium plate 500. Through the two arc-shaped grooves and one triangular groove, better impedance matching can be achieved and the working bandwidth is widened.

[0047] like Figure 1 to Figure 4As shown, the microstrip line feeding network 300 of this embodiment includes a first microstrip line group, a second microstrip line group and a second metal column 307. The first microstrip line group is arranged on the lower surface of the dielectric plate 600, and the second microstrip line group is arranged on the upper surface of the supporting dielectric plate 500. The first microstrip line group and the second microstrip line group are connected through the second metal column 307, wherein the second metal column 307 is a cylindrical structure.

[0048] Further, the first microstrip line group includes a first section microstrip line 302, a second section microstrip line 303, a third section microstrip line 304, a fourth section microstrip line 305 and a fifth section microstrip line 306, the second section microstrip line 303 and the third section microstrip line 304 constitute a pair of microstrip lines, the fourth section microstrip line 305 and the fifth section microstrip line 306 constitute a pair of microstrip lines, there are two second metal pillars 307, the second microstrip line group consists of two groups, and the two second metal pillars 307 correspond to the two groups of second microstrip line groups one by one; one end of the first section microstrip line 302 is connected to the first feeding input port 301, and the first feeding input port 301 of this embodiment is arranged at the lower edge of the lower surface of the dielectric plate 600, and the other end of the first section microstrip line 302 is respectively connected to one end of the second section microstrip line 303 and one end of the third section microstrip line 304, forming A T-shaped power divider is formed, the other end of the second microstrip line 303 is connected to one end of the fourth microstrip line 305, the other end of the third microstrip line 304 is connected to one end of the fifth microstrip line 306, the other end of the fourth microstrip line 305 is connected to a corresponding group of second microstrip line groups through one of the second metal pillars 307, and the other end of the fifth microstrip line 306 is connected to a corresponding group of second microstrip line groups through another second metal pillar 307; in order to connect the second metal pillar 307 to the fourth microstrip line 305 and the fifth microstrip line 306, the microstrip line feeding network 300 also includes a metal circular surface 308, there are two metal circular surfaces 308, the other end of the fourth microstrip line 305 and the other end of the fifth microstrip line 306 are respectively connected to the two second metal pillars 307 through the two metal circular surfaces 308.

[0049] Furthermore, each second microstrip line group includes a sixth microstrip line 309 and a seventh microstrip line 310 , one end of the sixth microstrip line 309 is connected to the first microstrip line group through the corresponding second metal column 307 , and the other end of the sixth microstrip line 310 is connected to the middle of the seventh microstrip line 310 .

[0050] Specifically, for one group of the second microstrip line groups, one end of the sixth microstrip line 309 is connected to the other end of the fourth microstrip line 305 through the corresponding second metal column 307; for the other group of the second microstrip line groups, one end of the sixth microstrip line 309 is connected to the other end of the fifth microstrip line 306 through the corresponding second metal column 307.

[0051] In this embodiment, the microstrip line feeding network 300 inputs an excitation signal through the first feeding input port 301 and transmits the excitation signal to the sixth microstrip line 309 and the seventh microstrip line 310 to excite the antenna.

[0052] In this embodiment, the first group of metal pillars 201 and the second group of metal pillars 202 each include six vertical metal pillars, and the third group of metal pillars 203 and the fourth group of metal pillars 204 are relatively special. Considering that the microstrip line feeding network 300 has two second metal pillars 307, the two second metal pillars 307 are respectively located in the third group of metal pillars 203 and the fourth group of metal pillars 204, therefore, the third group of metal pillars 203 and the fourth group of metal pillars 204 each include five vertical metal pillars; specifically, one of the second metal pillars 307 is located between two metal pillars of the third group of metal pillars 203, and the other second metal pillar 307 is located between two metal pillars of the fourth group of metal pillars 204.

[0053] Further, in the first group of metal pillars 201, three of the metal pillars are arranged side by side, and the upper ends are close to the first edge (right edge) of the first metal patch 101, and the other three metal pillars are arranged side by side, and the upper ends are close to the second edge (lower edge) of the first metal patch 101; in the second group of metal pillars 202, three of the metal pillars are arranged side by side, and the upper ends are close to the first edge (left edge) of the second metal patch 102, and the other three metal pillars are arranged side by side, and the upper ends are close to the second edge (lower edge) of the second metal patch 102; in the third group of metal pillars 203 In the fourth group of metal pillars 204, two metal pillars with the second metal pillar 307 between them are arranged side by side, and their upper ends are close to the first edge (upper edge) of the third metal patch 103, and the other three metal pillars are arranged side by side, and their upper ends are close to the second edge (right edge) of the third metal patch 103; in the fourth group of metal pillars 204, two metal pillars with the second metal pillar 307 between them are arranged side by side, and their upper ends are close to the first edge (upper edge) of the fourth metal patch 104, and the other three metal pillars are arranged side by side, and their upper ends are close to the second edge (left edge) of the fourth metal patch 104.

[0054] like Figure 1 to Figure 5 As shown, the slot microstrip line feeding network 400 includes a third microstrip line group and a slot groove 405 . The third microstrip line group is arranged on the lower surface of the dielectric plate 600 , and the slot groove 405 is opened on the metal floor 700 .

[0055] Furthermore, the third microstrip line group includes an eighth microstrip line 402, a ninth microstrip line 403 and a tenth microstrip line 404, one end of the eighth microstrip line 402 is connected to the second feeding input port 401, the other end of the eighth microstrip line 402 is connected to one end of the ninth microstrip line 403, the other end of the ninth microstrip line 403 is connected to one end of the tenth microstrip line 404, and the other end of the tenth microstrip line 404 is connected to the slot 405.

[0056] In this embodiment, the slot microstrip line feeding network 400 inputs an excitation signal through the second feeding input port 401 and transmits the excitation signal to the slot 405 to excite the antenna.

[0057] In order to fix the lower ends of the first metal column 200 and the second metal column 307, a first metal column groove 800 and a second metal column groove 900 are opened on the dielectric plate 600 and the metal floor 700. The first metal column groove 800 cooperates with the first metal column 200, and the second metal column groove 900 cooperates with the second metal column 307. In order to prevent the microstrip line feeding network 300 from short circuiting, the size of the second metal column groove 900 is larger than the size of the first metal column groove 800.

[0058] like Figure 6 As shown, it is a top-view dimensional diagram of the low-profile broadband high-isolation magnetoelectric dipole antenna of this embodiment, from top to bottom, the side length G1 of the supporting dielectric plate is 88.4mm, in each group of the first metal column, the diameter D1 of the metal column is 2mm, and then there are three spacings, the spacing S1 between the metal columns is 6.4mm, the distance S2 between the center of the first metal cylinder closest to the farther edge of the metal patch and the edge of the metal patch is 13.6mm, the spacing S3 between the two metal patches is 8.6mm, and there are grooves on the three corners of the four metal patches, which are two symmetrical arc grooves and a triangular groove, respectively, the radius R1 of the arc groove is 4.6mm, and the right-angle side length L of the triangular groove is 1.6mm. m The metal patch has two circular grooves for feeding structure access. The diameter of the circular groove D2 is 3.9 mm. The diameter of the metal circular surface of the feeding structure D3 is 2.9 mm. The length L on the metal patch is S It is 29.6mm.

[0059] like Figure 7 As shown, this is a side view dimension diagram of the low-profile broadband high-isolation magneto-electric dipole antenna of this embodiment, the overall antenna height H1 is 20 mm, the supporting dielectric plate thickness H2 is 0.762 mm, the dielectric plate thickness H3 is 0.762 mm, and the specifications used for the supporting dielectric plate and the dielectric plate are both Arlon 25FR dielectric plates with a dielectric constant of 3.58 and a loss tangent of 0.0035.

[0060] like Figure 8As shown, this is a three-dimensional dimension diagram of the microstrip line feeding network of the low-profile broadband high-isolation magnetoelectric dipole antenna of this embodiment. The branch L1 input at the first feeding input port is 3.4mm, W1 is 4.8mm, the length L2 of the first microstrip line is 6.7mm, and the width W2 is 1.5mm. The length L3 of the second and third microstrip lines is 23.4mm, and the width W3 is 1.8mm. The length L4 of the fourth and fifth microstrip lines is 43.3mm, and the width W4 is 1.9mm. The diameter of the metal circular surface D4 is 8mm, the height H1 of the second metal column is 20mm, the length L5 of the sixth microstrip line on the supporting medium plate is 5.9mm, and the width W5 is 2.7mm. The length L6 of the seventh microstrip line is 15.8mm, and the width W6 is 1.9mm.

[0061] like Fig. 9 As shown, the plane dimension diagram of the slot microstrip line feeding network of the low-profile broadband high-isolation magnetoelectric dipole antenna of this embodiment is shown. The branch L7 inputted by the second feeding input port is 3.4 mm, W7 is 4.8 mm, the length L8 of the eighth microstrip line is 13.3 mm, the width W8 is 1.5 mm, the length L9 of the ninth microstrip line is 31.4 mm, the width W9 is 3.2 mm, the length L10 of the tenth microstrip line is 13.3 mm, the width W10 is 13.3 mm, the length L20 of the ninth microstrip line is 13.3 mm, the width W10 is 13.3 mm, the length L30 of the tenth microstrip line is 13.3 mm, the width W10 is 13.3 mm, the length L40 of the tenth microstrip line is 13.3 mm, the width W10 is 10 21.9mm, width W 10 is 1.3mm, the slot length L a The slot width W is 52.3 mm. a The diameter of the second metal column groove D5 is 5.3 mm, and the diameter of the second metal column groove D5 opened to prevent the microstrip line feeding network from short circuit is 6 mm.

[0062] like Fig.10 As shown in FIG. 1 , it is an S parameter curve of the low-profile broadband high-isolation magnetoelectric dipole antenna of this embodiment. It can be seen that the antenna operating frequency band is 1.71 GHz-2.70 GHz, the relative bandwidth is 44.9%, and the isolation is greater than 44.5 dB; Fig.11 As shown in FIG. 1 , it is a gain curve diagram of the low-profile broadband high-isolation magneto-electric dipole antenna of this embodiment. It can be seen that the antenna gain is higher than 7.1 dBi. Figure 12a to Figure 12b , Figure 13a to Figure 13b As shown, this is the radiation pattern of the low-profile, broadband, high-isolation magneto-electric dipole antenna of this embodiment at different port inputs at the same center frequency (2.2GHz). It can be seen that the antenna has good radiation characteristics, a stable pattern, a front-to-back ratio greater than 12dB, and a cross-polarization less than -27dB.

[0063] To sum up, the antenna of the present invention utilizes a feeding method different from the traditional L-type probe feeding, and replaces the vertical patch with a copper column, thereby finally achieving a low profile, effectively reducing the cross-sectional height of the antenna, and can be suitable for more application scenarios. It also utilizes different polarization methods, different feeding methods, and increases the physical distance between the two feeding structures to achieve high isolation of the antenna.

[0064] The above is only a preferred embodiment of the present invention, but the implementation of the present invention is not limited to the above embodiment. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A low-profile broadband high-isolation magneto-electric dipole antenna, characterized in that: It includes a radiation patch, a first metal column, a microstrip line feeding network, a slot microstrip line feeding network, a supporting dielectric plate, a dielectric plate and a metal floor, wherein the metal floor is arranged on the upper surface of the dielectric plate, the radiation patch is arranged on the upper surface of the supporting dielectric plate, the first metal column connects the radiation patch and the metal floor to form a magnetoelectric dipole, and the microstrip line feeding network and the slot microstrip line feeding network form vertical horizontal polarization; The microstrip line feeding network comprises a first microstrip line group, a second microstrip line group and a second metal column, wherein the first microstrip line group is arranged on the lower surface of the dielectric plate, the second microstrip line group is arranged on the upper surface of the supporting dielectric plate, and the first microstrip line group and the second microstrip line group are connected via the second metal column; The slot microstrip line feeding network comprises a third microstrip line group and a slot groove, wherein the third microstrip line group is arranged on the lower surface of the dielectric plate, and the slot groove is opened on the metal floor; The radiation patch includes four horizontally placed metal patches, the first metal columns are divided into four groups, the four metal patches correspond to the four groups of first metal columns one by one, and each metal patch is connected to the metal floor through a corresponding group of first metal columns; there are two second metal columns, the second microstrip line groups are divided into two groups, the two second metal columns correspond to the two groups of second microstrip line groups one by one, and each group of second microstrip line groups is connected to the first microstrip line group through the corresponding second metal column; the four groups of first metal columns are respectively the first group of metal columns, the second group of metal columns, the third group of metal columns and the fourth group of metal columns, the first group of metal columns and the second group of metal columns each include six vertical metal columns, the third group of metal columns and the fourth group of metal columns each include five vertical metal columns, one second metal column is located between two metal columns of the third group of metal columns, and the other second metal column is located between two metal columns of the fourth group of metal columns.

2. The low-profile broadband high-isolation magneto-electric dipole antenna according to claim 1, characterized in that: Each metal patch is a square structure, and two symmetrical arc-shaped grooves and one triangular groove are opened on three corners of each metal patch.

3. The low-profile broadband high-isolation magneto-electric dipole antenna according to claim 1, characterized in that: Among the first group of metal pillars and the second group of metal pillars, three metal pillars are arranged side by side, and their upper ends are close to the first edge of the corresponding metal patch, and the other three metal pillars are arranged side by side, and their upper ends are close to the second edge of the corresponding metal patch; In the third group of metal pillars and the fourth group of metal pillars, two metal pillars with the second metal pillar between them are arranged side by side, and their upper ends are close to the first edge of the corresponding metal patch, and the other three metal pillars are arranged side by side, and their upper ends are close to the second edge of the corresponding metal patch; Wherein, the first edge is perpendicular to the second edge.

4. The low-profile broadband high-isolation magneto-electric dipole antenna according to claim 1, characterized in that: The first microstrip line group includes a first section microstrip line, a second section microstrip line, a third section microstrip line, a fourth section microstrip line and a fifth section microstrip line, the second section microstrip line and the third section microstrip line form a pair of microstrip lines, the fourth section microstrip line and the fifth section microstrip line form a pair of microstrip lines, there are two second metal pillars, there are two second microstrip line groups, and the two second metal pillars correspond to the two second microstrip line groups one by one; One end of the first microstrip line is connected to the first feeding input port, the other end of the first microstrip line is respectively connected to one end of the second microstrip line and one end of the third microstrip line to form a T-type power divider, the other end of the second microstrip line is connected to one end of the fourth microstrip line, the other end of the third microstrip line is connected to one end of the fifth microstrip line, the other end of the fourth microstrip line is connected to a corresponding group of second microstrip line groups through one of the second metal pillars, and the other end of the fifth microstrip line is connected to a corresponding group of second microstrip line groups through another second metal pillar.

5. The low-profile broadband high-isolation magneto-electric dipole antenna according to claim 1, characterized in that: The second microstrip line group includes a sixth microstrip line and a seventh microstrip line. One end of the sixth microstrip line is connected to the first microstrip line group through a second metal column, and the other end of the sixth microstrip line is connected to the middle of the seventh microstrip line.

6. The low-profile broadband high-isolation magneto-electric dipole antenna according to claim 1, characterized in that: The third microstrip line group includes an eighth microstrip line, a ninth microstrip line and a tenth microstrip line, one end of the eighth microstrip line is connected to the second feeding input port, the other end of the eighth microstrip line is connected to one end of the ninth microstrip line, the other end of the ninth microstrip line is connected to one end of the tenth microstrip line, and the other end of the tenth microstrip line is connected to the slot.

7. The low-profile broadband high-isolation magneto-electric dipole antenna according to claim 6, characterized in that: The length of the ninth microstrip line is greater than the lengths of the eighth microstrip line and the tenth microstrip line, and the width of the ninth microstrip line is greater than the widths of the eighth microstrip line and the tenth microstrip line.

8. A wireless communication device, characterized in that: The invention comprises the low-profile, broadband, high-isolation magneto-electric dipole antenna as described in any one of claims 1 to 7.

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