CN214589236U

CN214589236U - Dual-polarized antenna, antenna array and electronic equipment

Info

Publication number: CN214589236U
Application number: CN202023022113.1U
Authority: CN
Inventors: 尹作彪; 许悦; 张西洋
Original assignee: Blue Chuangyuan Beijing Technology Co ltd
Current assignee: Blue Chuangyuan Beijing Technology Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-11-02
Anticipated expiration: 2030-12-14

Abstract

The application discloses a dual-polarized antenna, an antenna array and electronic equipment, wherein the dual-polarized antenna comprises a substrate and an antenna main body; the antenna main body is arranged on the first surface of the substrate, a shielding part surrounding the antenna main body is arranged on the substrate, and the shielding part is polygonal; the antenna main body comprises a first feeding branch, a second feeding branch and a metal patch; one end of the first feed branch is connected with the metal patch, and the other end of the first feed branch is provided with a first feed point; one end of the second feed branch is connected with the metal patch, and the other end of the second feed branch is provided with a second feed point. This dual polarized antenna's shielding part adopts the polygon structure to under the condition of constituteing the array by a plurality of dual polarized antennas, utilize the topside or the base of polygonal shielding part as the reference, the location of arranging of each antenna of being more convenient for, and each dual polarized antenna makes the inseparabler arrangement of dual polarized antenna, is favorable to realizing the miniaturization.

Description

Dual-polarized antenna, antenna array and electronic equipment

Technical Field

The present disclosure relates to the field of wireless communications, and more particularly, to a dual-polarized antenna, an antenna array and an electronic device.

Background

Antennas are important components of wireless communication systems as a means of transmitting and receiving electromagnetic waves. The dual-polarized antenna can simultaneously transmit and receive electromagnetic wave signals with two orthogonal polarization directions, which is equivalent to providing two transmission channels on a frequency band, and can effectively improve the reliability of a wireless communication system.

In the actual use process, a plurality of dual-polarized antennas are often required to form an array, but interference is generated between the dual-polarized antennas at a short distance, so that the normal operation of the dual-polarized antennas is influenced. In order to reduce mutual interference between dual-polarized antennas in the array, metallized via holes which are circularly arranged are arranged around an antenna main body of each dual-polarized antenna, but when the array is formed, the metallized via holes which are circularly arranged are not convenient for arrangement of the antennas, lead to sparse arrangement of the antennas, and are not beneficial to realizing miniaturization.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a dual polarized antenna, an antenna array and an electronic device, which mainly aim to solve the technical problems in the prior art.

In a first aspect, according to an embodiment of the present application, there is provided a dual polarized antenna including a substrate and an antenna body;

the antenna main body is arranged on the first surface of the substrate, and a shielding part surrounding the antenna main body is arranged on the substrate and is polygonal;

the antenna main body comprises a first feeding branch, a second feeding branch and a metal patch;

one end of the first feed branch is connected with the metal patch, and the other end of the first feed branch is provided with a first feed point; one end of the second feed branch is connected with the metal patch, a second feed point is arranged at the other end of the second feed branch, and the first feed point and the second feed point are both connected with the feed circuit.

In one possible implementation, the corners of the polygon are rounded.

In one possible implementation, the polygon is a rectangle or a square.

In one possible implementation, in the case where the polygon is a square, the side length of the square is 45.3mm to 46.3 mm.

In one possible implementation, the metal patch is polygonal.

In one possible implementation, the metal patch is square.

In one possible implementation, the sides of the square are 27.3mm to 28.3 mm.

In one possible implementation, the substrate is polygonal.

In one possible implementation, the substrate is square.

In one possible implementation, the sides of the square are 79.5mm-80.5 mm.

In a possible implementation manner, the first feeding branch is bent toward a first direction, the second feeding branch is bent toward a second direction, and the first direction is the same as or different from the second direction.

In a possible implementation manner, the first feed branch includes a first impedance matching patch, and the first feed point is connected to the metal patch through the first impedance matching patch; the second feed branch comprises a second impedance matching patch, and the second feed point is connected with the metal patch through the second impedance matching patch.

In a possible implementation manner, the first feeding branch further includes a first feeding line connected between the first feeding line and the first impedance matching patch; the second feed stub further comprises a second feed line connected between the second feed line and the second impedance matching patch.

In a possible implementation manner, the first feeding branch further includes a third feeding line connected between the first impedance matching patch and the metal patch and bent toward the first direction; the second feed branch also comprises a fourth feed line which is connected between the second impedance matching patch and the metal patch and is bent towards the second direction.

In a possible implementation manner, the width of the first feeder line and the second feeder line is 0.3mm to 0.5mm, and the length of the first feeder line and the second feeder line is 2.3mm to 3.1 mm.

In a possible implementation manner, the first feed point and the second feed point are polygons, and a via hole is formed in the middle of the polygons.

In one possible implementation manner, the first feed point and the second feed point are rectangles.

In one possible implementation, the width of the rectangle is 2.1mm-3.1mm, and the distance from the long side of the rectangle to the joint is 2.5mm-3.5 mm.

In one possible implementation, the first impedance matching patch and the second impedance matching patch are polygonal.

In one possible implementation, the first impedance matching patch and the second impedance matching patch are rectangular.

In one possible implementation, the length of the rectangle is 4mm-6mm, and the distance from the long side of the rectangle to the joint is 0.5mm-2 mm.

In one possible implementation, the third feeder line includes a first feeder section, a second feeder section, and a third feeder section;

the first feeding section is connected with the third feeding section through a second feeding section; the first feeding section and the third feeding section are perpendicular to each other, and the second feeding section is obliquely arranged relative to the third feeding section;

the fourth feeder line comprises a fourth feeder section, a fifth feeder section and a sixth feeder section;

the fourth feeding section is connected with the sixth feeding section through a fifth feeding section; the fourth feeding section and the sixth feeding section are perpendicular to each other, and the fifth feeding sections are respectively arranged obliquely relative to the sixth feeding sections.

In a possible implementation manner, the included angle between the second feeding section and the third feeding section is 40-50 °; the included angle between the fifth feeding section and the sixth feeding section is 40-50 degrees.

In one possible implementation, the length of the first feed section and the length of the fourth feed section are 3.87mm to 3.97 mm.

In a possible implementation manner, first center lines of the third feed section, the first impedance matching patch, the first feed line and the first feed point are on the same straight line, and the first center line is parallel to the first direction;

and second center lines of the sixth feed section, the second impedance matching patch, the third feed line and the second feed point are on the same straight line, and the second center lines are parallel to the second direction.

In a possible implementation manner, the vertical distance from the first central line to the metal patch is 4.5mm-5.5mm, and the vertical distance from the second central line to the metal patch is 4.5mm-5.5 mm.

In a possible implementation manner, a distance between a third center line of the first feed point and a third center line of the first feed section is 10.8mm-11.8mm, and the third center line is perpendicular to the first direction;

the distance between a fourth central line of the second feed point and a fourth central line of a fourth feed section is 10.8mm-11.8mm, and the fourth central line is perpendicular to the first direction.

In a possible implementation manner, the second surface of the substrate is used for providing a feeding circuit connected to the first feeding point and the second feeding point, and the second surface is opposite to the first surface.

In one possible implementation, the base plate comprises a first reference ground layer, a second reference ground layer and an FR4 medium plate arranged between the first reference ground layer and the second reference ground layer;

the first reference stratum is provided with a patch window, and the first feed branch, the second feed branch and the metal patch are located in the patch window.

In one possible implementation, the FR4 dielectric plate has a thickness of 1.5mm to 1.7mm and a dielectric constant of 4.6.

In a possible implementation manner, an included angle greater than zero is formed between the first feeding branch and the second feeding branch.

In a possible implementation manner, the included angle formed by the first feeding branch and the second feeding branch is 90 °.

In one possible implementation, the shielding portion includes a plurality of shielding holes, and the plurality of shielding holes enclose the polygon.

In a second aspect, according to an embodiment of the present application, there is provided an antenna array comprising a plurality of dual-polarized antennas as described above.

In a possible implementation manner, the plurality of dual-polarized antennas are arranged into N annular arrays, where N is a positive integer not less than 1.

In one possible implementation manner, the dual-polarized antennas in the nth annular array are arranged along the peripheral edge of the substrate of the array, and the nth annular array is the annular array closest to the edge of the substrate.

In one possible implementation, the substrate is polygonal.

In a possible implementation manner, the substrate is square, and an avoidance chamfer is arranged at each vertex angle of the substrate.

In a possible implementation manner, the antenna bodies of the multiple dual-polarized antennas are located on a first surface of a substrate of the array, a second surface of the substrate is used for arranging a feed circuit connected to the dual-polarized antennas, and the second surface is opposite to the first surface.

In a third aspect, according to an embodiment of the present application, there is provided an electronic device comprising the above-mentioned dual-polarized antenna and/or the above-mentioned antenna array.

The embodiment of the application provides a dual polarized antenna, antenna array and electronic equipment, this dual polarized antenna's shielding part adopts polygon structure to under the condition of constituteing the array by a plurality of dual polarized antennas, utilize the top edge or the base of polygonal shielding part as the reference, the location of arranging of each antenna of being more convenient for, and each dual polarized antenna makes the more inseparable arranging of dual polarized antenna, is favorable to realizing the miniaturization.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a perspective view of a dual-polarized antenna provided in an embodiment of the present application;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a block diagram of a first feed branch;

FIG. 4 is a schematic size diagram of a first feed stub;

FIG. 5 is a block diagram of a second feed branch;

FIG. 6 is a schematic size diagram of a second feed stub;

fig. 7 is a return loss S11 graph of the dual-polarized antenna according to an embodiment of the present application;

fig. 8 is a graph illustrating two port isolation curves of a dual-polarized antenna according to an embodiment of the present application;

FIG. 9 is a graph of X-direction polarization gain and cross-polarization gain for a first feed point in accordance with an embodiment of the present application;

fig. 10 is a structural diagram of an antenna array according to an embodiment of the present application.

The antenna comprises an antenna body 1, an antenna body 11, a first feed branch, a first feed line 111, a first impedance matching patch 112, a third feed line 113, a first feed section 1131, a first feed section 1132, a second feed section 1133, a third feed section 12, a second feed branch, a second feed line 121, a second impedance matching patch 122, a fourth feed line 123, a fourth feed section 1231, a fourth feed section 1232, a fifth feed section 1233, a sixth feed section 1233, a shielding hole 13, a patch window 14, a metal patch 15, a first feed point 16, a second feed point 17, a substrate 2, a reference ground layer 21, a reference ground layer 22-FR4 dielectric plate 23, a second reference ground layer 23 and a back-off chamfer 3.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In a first aspect, as shown in fig. 1, according to an embodiment of the present application, there is provided a dual polarized antenna including a substrate 2 and an antenna body 1; the antenna body 1 is arranged on the first surface of the substrate 2, and the substrate 2 is provided with a shielding part surrounding the antenna body 1, and the shielding part is polygonal; the antenna main body 1 comprises a first feeding branch 11, a second feeding branch 12 and a metal patch 15; one end of the first feeding branch 11 is connected with the metal patch 15, and the other end of the first feeding branch 11 is provided with a first feeding point 16; one end of the second feeding branch 12 is connected with the metal patch 15, the other end of the second feeding branch 12 is provided with a second feeding point 17, and the first feeding point 16 and the second feeding point 17 are both connected with a feeding circuit.

The antenna body 1 may be made of a conductive material such as silver, aluminum, iron, zinc, or a metal alloy, and preferably a conductive material with low loss, such as a copper surface or silver.

The electromagnetic field of the dual-polarized antenna is attenuated by the shielding part, so that the shielding part plays a role in shielding, interference between the dual-polarized antennas at a short distance in the array is reduced, and normal work of the dual-polarized antennas is guaranteed. Meanwhile, the top edge or the bottom edge of the polygonal shielding part is used as a reference, so that the antennas are more conveniently arranged and positioned, and the shielding part is a square, so that the antennas can be aligned by taking the top edge or the bottom edge of the shielding part of the adjacent dual-polarized antenna as a reference under the condition that a plurality of dual-polarized antennas form a square array, and the positions of the antennas can be determined more quickly and accurately. In addition, the polygonal shielding part enables the dual-polarized antennas in the array to be arranged more tightly, so that the size of the antenna array is reduced, the miniaturization is facilitated, and the actual requirement is met.

This embodiment provides a dual polarized antenna, and this dual polarized antenna's shielding part adopts polygonized structure to under the condition of forming the array by a plurality of dual polarized antennas, utilize the topside or the base of polygonized shielding part as the reference, the location of arranging of each antenna of being more convenient for, and each dual polarized antenna makes dual polarized antenna inseparabler arrange, is favorable to realizing the miniaturization.

Further, as shown in fig. 1 and 2, corners of the polygon are rounded. In specific application, the corners of the polygonal shielding parts are set to be round corners, so that the dual-polarized antenna can be arranged on the substrate 2 with the round corners, and the arrangement flexibility of the dual-polarized antenna is improved. Optionally, the polygon is a rectangle or a square. The number of the sides of the rectangle or the square is small, and the included angle of the adjacent sides is 90 degrees, so that the difficulty of manufacturing the polygon can be reduced, and the manufacturing process is simplified.

Specifically, as shown in fig. 2, when the shield part is square, the side length of the square is 45.3mm to 46.3 mm. Of course, in other embodiments, the side length of the square may be adjusted by a worker according to actual requirements, which is not strictly limited herein.

Further, the metal patch 15 is polygonal, and in some preferred implementations, as shown in fig. 1 and 2, the metal patch 15 is square, so as to facilitate the fabrication of the metal patch 15. Likewise, the substrate 2 is polygonal, and in some preferred implementations, the substrate 2 is square, so as to facilitate the fabrication of the substrate 2; the first feed point 16 and the second feed point 17 are polygonal, a via hole is formed in the middle of the polygon and is used for connecting with the rf switch array through a feed circuit, and in some preferred implementations, the first feed point 16 and the second feed point 17 are rectangular, so as to facilitate the manufacturing of the substrate 2.

Further, as shown in fig. 1 and 2, the first feeding branch 11 is bent toward a first direction, and the second feeding branch 12 is bent toward a second direction, where the first direction is the same as or different from the second direction.

First feed minor matters 11 and the second feed minor matters 12 of buckling can reduce antenna body 1's size when guaranteeing the length of first feed minor matters 11 and second feed minor matters 12 to reduce dual polarized antenna's volume, reduce weight, be convenient for integrate and constitute the array, satisfy the demand that electronic product miniaturized used.

Specifically, the first feed branch 11 includes a first impedance matching patch 112, and the first feed point 16 is connected to the metal patch 15 through the first impedance matching patch 112; the second feed limb 12 comprises a second impedance matching patch 122, and the second feed point 17 is connected to the metal patch 15 via the second impedance matching patch 122.

The first impedance matching patch 112 and the second impedance matching patch 122 may be set according to an actually required operating frequency range, so that the imaginary part of the input impedance is small and the real part is close to 50 ohms to ensure that the antenna and the feeder line are in good impedance matching.

Further, as shown in fig. 1, the first feeding branch 11 further includes a first feeding line 111 connected between the first feeding point 16 and the first impedance matching patch 112; the second feed stub 12 further comprises a second feed line 121 connected between the second feed point 17 and a second impedance matching patch 122.

Further, as shown in fig. 1, the first feeding branch 11 further includes a third feeding line 113 connected between the first impedance matching patch 112 and the metal patch 15 and bent toward the first direction; the second feeding branch further includes a fourth feeding line 123 connected between the second impedance matching patch 122 and the metal patch 15 and bent toward the second direction. By arranging the plurality of feeder lines, the matching degree of the antenna impedance can be adjusted, so that the matching performance of the antenna is improved.

Further, the first impedance matching patch 112 and the second impedance matching patch 122 are polygonal, and in some preferred implementations, the first impedance matching patch 112 and the second impedance matching patch 122 are rectangular, so as to facilitate the fabrication of the impedance matching patches.

Further, as shown in fig. 3 and 4, the third feed line 113 includes a first feed section 1131, a second feed section 1132, and a third feed section 1133; the first feeding section 1131 is connected to the third feeding section 1133 through the second feeding section 1132; the first feeding section 1131 and the third feeding section 1133 are perpendicular to each other, and the second feeding section 1132 is disposed obliquely to the third feeding section 1133; the fourth feeder line 123 includes a fourth feeding section 1231, a fifth feeding section 1232, and a sixth feeding section 1233; the fourth feeding section 1231 is connected to the sixth feeding section 1233 through the fifth feeding section 1232; the fourth feeding sections 1231 and the sixth feeding sections 1233 are perpendicular to each other, and the fifth feeding sections 1232 are respectively disposed obliquely with respect to the sixth feeding sections 1233.

The second connecting section and the fourth connecting section are utilized to generate an inclined splicing effect, so that the discontinuity effect is eliminated, the discontinuity effect is minimized, the performance of the dual-polarized antenna is ensured, and the deterioration of various circuit indexes caused by the discontinuity of the transmission line at the bent part is avoided.

Specifically, as shown in fig. 3 and 5, the first center lines of the third feeding section 1133, the first impedance matching patch 112, the first feeding line 111 and the first feeding point 16 are on the same straight line, and the first center line is parallel to the first direction; the second center lines of the sixth feeding section 1233, the second impedance matching patch 122, the third feeding line 113 and the second feeding point 17 are on the same straight line, and the second center line is parallel to the second direction.

Further, a second surface of the substrate 2 is used for disposing a feeding circuit connected to the first feeding point 16 and the second feeding point 17, and the second surface is opposite to the first surface. The feed circuit is arranged on the second surface of the substrate 2, so that the wiring of the feed point circuit can be facilitated, and the manufacture is facilitated.

Further, as shown in fig. 1, the base plate 2 includes a first reference ground layer 21, a second reference ground layer 23, and an FR4 dielectric slab 22 disposed between the first reference ground layer 21 and the second reference ground layer 23; the first reference ground layer 21 is provided with a patch window 14, and the first feeding branch 11, the second feeding branch 12 and the metal patch 15 are located in the patch window 14.

The FR4 material has the advantages of stable electrical insulation, good flatness, smooth surface, no pit, standard thickness tolerance, good electrical characteristics and small environmental influence. The bandwidth of the antenna is expanded by increasing the thickness of the substrate and reducing the dielectric constant of the substrate, but if the ratio of the thickness of the substrate to the wavelength is too large, significant excitation of surface waves is caused, and it is disadvantageous and compact, and therefore, in the present embodiment, the FR4 dielectric plate 22 having a thickness of 1.5mm to 1.7mm and a dielectric constant of 4.6 is selected, which can both avoid significant excitation of surface waves and ensure a wide bandwidth of the antenna.

In a specific application, the dual-polarized antenna may have the following shape and size:

the shielding part is square, and the side length d1 of the square is 45.3mm-46.3 mm; the metal patch 15 is square, and the side length L2 of the square is 27.3mm-28.3 mm; the substrate 2 is square, and the side length L1 of the square is 79.5mm-80.5 mm; the width W1 of the first feeder line 111 and the second feeder line 121 is 0.3mm-0.5mm, and the length L6 is 2.3mm-3.1 mm; the first feed point 16 and the second feed point 17 are rectangles, the width L3 of the rectangle is 2.1mm-3.1mm, and the length L4 is 2.5mm-3.5 mm; the first impedance matching patch 112 and the second impedance matching patch 122 are rectangular, the length L5 of the rectangle is 4mm-6mm, and the distance W2 from the long side to the junction is 0.5mm-2 mm; the angle α between the second feeding segment 1132 and the third feeding segment 1133 is 40 ° -50 °, and the angle α between the fifth feeding segment 1232 and the sixth feeding segment 1233 is 40 ° -50 °; the length of the first feeding section 1131 and the length L8 of the fourth feeding section 1231 are 3.87mm to 3.97 mm; the vertical distance L7 from the first central line to the metal patch 15 is 4.5mm-5.5mm, and the vertical distance L7 from the second central line to the metal patch 15 is 4.5mm-5.5 mm; the distance L9 between the third centerline of the first feed point 16 and the third centerline of the first feed section 1131 is 10.8mm-11.8mm, and the distance L9 between the fourth centerline of the second feed point 17 and the fourth centerline of the fourth feed section 1231 is 10.8mm-11.8 mm; the FR4 dielectric board 22 has a thickness of 1.5mm-1.7mm and a dielectric constant of 4.6.

In some preferred implementations, as shown in fig. 2, 4 and 6, the shield is square with a side length d1 of 45.8 mm; the metal patch 15 is a square with the side length L2 of 27.8 mm; the substrate 2 is a square with the side length L1 of 80 mm; the width W1 of the first feed line 111 and the second feed line 121 is 0.4mm, and the length L6 is 2.8 mm; the first feed point 16 and the second feed point 17 are rectangles with the width L3 of 2.6mm and the length L4 of 3 mm; the first and second impedance matching patches 112, 122 are rectangular, with a length L5 of 5.5mm and a distance W2 from the long side to the connection of 1 mm; the angle α between the second feeding segment 1132 and the third feeding segment 1133 is 45 °, and the angle α between the fifth feeding segment 1232 and the sixth feeding segment 1233 is 45 °; the length of the first feeding segment 1131 and the length L8 of the fourth feeding segment 1231 are 3.92 mm; the perpendicular distance L7 from the first center line to the metal patch 15 is 5mm, and the perpendicular distance L7 from the second center line to the metal patch 15 is 5 mm; the distance L9 between the third centerline of the first feed point 16 and the third centerline of the first feed segment 1131 is 11.3mm, and the distance L9 between the fourth centerline of the second feed point 17 and the fourth centerline of the fourth feed segment 1231 is 11.3 mm; the FR4 dielectric board 22 has a thickness of 1.6mm and a dielectric constant of 4.6. The simulation software is used for simulating the antenna to obtain the simulation results of fig. 7 to 9, and the frequency band bandwidth of the antenna is 2GHz-3GHz and covers the whole frequency band (2.4GHz-2.48GHz) of the Bluetooth, so that the antenna can be used as a signal transceiver in the field of Bluetooth communication.

It is understood that in other embodiments, the parameters of the antenna may be adjusted by the operator according to actual requirements, and are not limited herein.

Further, an included angle larger than zero is formed between the first feeding branch 11 and the second feeding branch 12. An included angle larger than zero is formed between the first feeding branch 11 and the second feeding branch 12, so that the dual-polarized antenna has two polarization directions and can simultaneously transmit and receive electromagnetic wave signals with the two orthogonal polarization directions. In some preferred implementations, the angle formed between the first feed branch 11 and the second feed branch 12 is 90 °, so that the two polarization directions of the dual-polarized antenna are orthogonal.

Further, the shielding portion includes a plurality of shielding holes 13, and the plurality of shielding holes 13 enclose the polygon. The shielding holes can adopt metalized through holes.

Each dual-polarized antenna of the antenna array in the embodiment adopts the dual-polarized antenna in the above embodiment, so that under the condition that the array is formed by a plurality of dual-polarized antennas, the top edge or the bottom edge of the polygonal shielding part is used as a reference, the antennas are more conveniently arranged and positioned, and each dual-polarized antenna enables the dual-polarized antenna to be more closely arranged, thereby being beneficial to realizing miniaturization.

In a specific application, a plurality of dual-polarized antennas are arranged into N annular arrays, where N is a positive integer not less than 1. Further, as shown in fig. 10, the dual-polarized antennas in the nth annular array are arranged along the peripheral edge of the substrate 2 of the array, and the nth annular array is the annular array closest to the edge of the substrate 2. The dual-polarized antennas in the outermost annular array are arranged along the peripheral edge of the substrate 2, so that the array can have the caliber as large as possible.

Further, the substrate 2 has a polygonal shape. Specifically, the substrate 2 is square, and each vertex angle of the substrate 2 is provided with an avoidance chamfer 3, so that the antenna array can be mounted on a packaging insulating shell with a fillet, and the applicability of the antenna array is improved. .

Further, the antenna bodies 1 of the multiple dual-polarized antennas are located on a first surface of a substrate 2 of the array, a second surface of the substrate 2 is used for arranging a feed circuit connected with the dual-polarized antennas, and the second surface is opposite to the first surface. The antenna main body 1 of each dual-polarized antenna in the antenna array is arranged on the same surface of the substrate 2, and the feed circuit is arranged on the other common surface of the substrate 2, so that the interference and obstruction of the antenna main body 1 to the feed circuit are avoided, and the wiring of the feed circuit is convenient.

The antenna array can be applied to positioning Of bluetooth AOA (Angle Of Arrival) communication, and specifically, the antenna array can be installed in an electronic device at a receiving end, after receiving a bluetooth signal, the received bluetooth signal is fed into a computing module, the computing module converts the bluetooth signal Of each dual-polarized antenna into signal parameters such as phase and frequency Of the signal received by each dual-polarized antenna, and accurate position information Of a transmitting end can be calculated through an AOA algorithm according to the signal parameters. Moreover, the dual-polarized antenna can receive incoming waves in any polarization direction, so that an antenna array formed by the dual-polarized antenna can also receive incoming waves in any polarization direction, signals cannot be lost, errors of signal parameters such as phases and frequencies are reduced, subsequent AOA estimation and positioning calculation are facilitated, and positioning accuracy is improved.

The electronic device includes but is not limited to bluetooth positioning device, etc., and the electronic device includes the antenna structure explained in the above embodiment, therefore, the shielding part of the dual-polarized antenna in the electronic device adopts a polygonal structure, so that under the condition that an array is formed by a plurality of dual-polarized antennas, the top edge or the bottom edge of the polygonal shielding part is used as a reference, thereby being more convenient for the arrangement and positioning of the antennas, and each dual-polarized antenna enables the dual-polarized antenna to be more closely arranged, which is beneficial to realizing miniaturization. .

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A dual polarized antenna, characterized by comprising a substrate (2) and an antenna body (1);

the antenna main body (1) is arranged on the first surface of the substrate (2), a shielding part surrounding the antenna main body (1) is arranged on the substrate (2), and the shielding part is polygonal;

the antenna main body (1) comprises a first feeding branch (11), a second feeding branch (12) and a metal patch (15);

one end of the first feeding branch (11) is connected with the metal patch (15), and the other end of the first feeding branch (11) is provided with a first feeding point (16); one end of the second feeding branch (12) is connected with the metal patch (15), and a second feeding point (17) is arranged at the other end of the second feeding branch (12).

2. The dual polarized antenna of claim 1, wherein corners of the polygon are rounded corners.

3. The dual polarized antenna of claim 2, wherein the polygon is a rectangle or a square.

4. A dual polarized antenna according to claim 3, wherein in the case where the shield is square, the square has a side length of 45.3mm-46.3 mm.

5. A dual polarized antenna according to claim 1, characterized in that the metal patch (15) is polygonal.

6. A dual polarized antenna according to claim 5, characterized in that the metal patches (15) are square.

7. A dual polarized antenna according to claim 6, wherein the sides of the square are 27.3mm-28.3 mm.

8. A dual polarized antenna according to claim 1, characterized in that the substrate (2) is polygonal.

9. A dual polarized antenna according to claim 8, characterized in that the substrate (2) is square.

10. A dual polarized antenna according to claim 9, wherein the sides of the square are 79.5mm-80.5 mm.

11. A dual polarized antenna according to claim 1, characterized in that the first feeding branch (11) is bent in a first direction and the second feeding branch (12) is bent in a second direction, the first direction being the same or different from the second direction.

12. A dual polarized antenna according to claim 11, characterized in that the first feed stub (11) comprises a first impedance matching patch (112), the first feed point (16) being connected to the metal patch (15) through the first impedance matching patch (112); the second feed stub (12) comprises a second impedance matching patch (122), and the second feed point (17) is connected with the metal patch (15) through the second impedance matching patch (122).

13. A dual polarized antenna according to claim 12, characterized in that the first feed stub (11) further comprises a first feed line (111) connected between the first feed point (16) and the first impedance matching patch (112); the second feed stub (12) further comprises a second feed line (121) connected between the second feed point (17) and the second impedance matching patch (122).

14. A dual polarized antenna according to claim 13, characterized in that the first feed stub (11) further comprises a third feed line (113) connected between the first impedance matching patch (112) and the metal patch (15) and bent towards the first direction; the second feed branch also comprises a fourth feed line (123) which is connected between the second impedance matching patch (122) and the metal patch (15) and is bent towards the second direction.

15. A dual polarized antenna according to claim 13, wherein the first feed line (111) and the second feed line (121) have a width of 0.3mm-0.5mm and a length of 2.3mm-3.1 mm.

16. A dual polarized antenna according to claim 12, wherein the first feed point (16) and the second feed point (17) are polygonal, and a via hole is provided in the middle of the polygon.

17. A dual polarized antenna according to claim 16, characterized in that the first feed point (16) and the second feed point (17) are rectangular.

18. A dual polarized antenna according to claim 17, wherein said rectangle has a width of 2.1mm-3.1mm and a length of 2.5mm-3.5 mm.

19. A dual polarized antenna according to claim 12, characterized in that the first impedance matching patch (112) and the second impedance matching patch (122) are polygonal.

20. A dual polarized antenna according to claim 19, characterized in that the first impedance matching patch (112) and the second impedance matching patch (122) are rectangular.

21. A dual polarized antenna according to claim 20, wherein the rectangle has a length of 4mm-6mm and the distance from the long side of the rectangle to the junction is 0.5mm-2 mm.

22. A dual polarized antenna according to claim 14, wherein the third feed line (113) comprises a first feed segment (1131), a second feed segment (1132) and a third feed segment (1133);

the first feed section (1131) is connected to the third feed section (1133) by a second feed section (1132); the first feed section (1131) and the third feed section (1133) are perpendicular to each other, and the second feed section (1132) is obliquely arranged relative to the third feed section (1133);

the fourth feed (123) comprises a fourth feed section (1231), a fifth feed section (1232), and a sixth feed section (1233);

the fourth feeding section (1231) is connected with the sixth feeding section (1233) through a fifth feeding section (1232); the fourth feeding section (1231) and the sixth feeding section (1233) are perpendicular to each other, and the fifth feeding section (1232) is obliquely arranged relative to the sixth feeding section (1233), respectively.

23. A dual polarized antenna according to claim 22, wherein the angle between the second feed segment (1132) and the third feed segment (1133) is 40 ° -50 °; the included angle between the fifth feeding section (1232) and the sixth feeding section (1233) is 40-50 degrees.

24. A dual polarized antenna according to claim 23, characterized in that the length of the first feed segment (1131) and the length of the fourth feed segment (1231) are 3.87mm-3.97 mm.

25. A dual polarized antenna according to claim 22, characterized in that first center lines of the third feed segment (1133), the first impedance matching patch (112), the first feed line (111) and the first feed point (16) are on the same straight line, said first center lines being parallel to said first direction;

and second center lines of the sixth feed section (1233), the second impedance matching patch (122), the third feed line (113) and the second feed point (17) are on the same straight line, and the second center lines are parallel to the second direction.

26. A dual polarized antenna according to claim 25, characterized in that the first centre line is at a vertical distance of 4.5mm-5.5mm from the metal patch (15) and the second centre line is at a vertical distance of 4.5mm-5.5mm from the metal patch (15).

27. A dual polarized antenna according to claim 22, characterized in that the distance between a third centre line of the first feed point (16) and a third centre line of the first feed section (1131), which third centre line is perpendicular to the first direction, is 10.8mm-11.8 mm;

the distance between a fourth central line of the second feed point (17) and a fourth central line of a fourth feed section (1231) is 10.8mm-11.8mm, and the fourth central line is perpendicular to the first direction.

28. A dual polarized antenna according to claim 1, characterized in that a second surface of the substrate (2) is provided for feeding circuitry connected to the first feed point (16) and the second feed point (17), the second surface being opposite to the first surface.

29. A dual polarized antenna according to claim 1, characterized in that the substrate (2) comprises a first reference ground layer (21), a second reference ground layer (23) and an FR4 dielectric board (22) arranged between the first reference ground layer (21) and the second reference ground layer (23);

the first reference stratum (21) is provided with a patch window (14), and the first feed branch (11), the second feed branch (12) and the metal patch (15) are located in the patch window (14).

30. A dual polarized antenna according to claim 29, wherein said FR4 dielectric board (22) has a thickness of 1.5mm-1.7mm and a dielectric constant of 4.6.

31. A dual polarized antenna according to claim 1, characterized in that said first (11) and second (12) feeding branches form an angle therebetween which is greater than zero.

32. A dual polarized antenna according to claim 31, characterized in that the first feed stub (11) and the second feed stub (12) form an angle of 90 °.

33. A dual polarized antenna according to claim 1, wherein said shield portion comprises a plurality of shield holes (13), said plurality of shield holes (13) enclosing said polygon.

34. An antenna array comprising a plurality of said dual polarized antennas of claims 1-33.

35. An antenna array according to claim 34, wherein a plurality of the dual polarized antennas are arranged in N annular arrays, where N is a positive integer not less than 1.

36. An antenna array according to claim 35, characterized in that the dual polarized antennas in the nth annular array are arranged along the peripheral edge of the substrate (2) of the array, the nth annular array being the annular array closest to the edge of the substrate (2).

37. An antenna array according to claim 36, characterized in that the substrate (2) is polygonal.

38. An antenna array according to claim 37, characterized in that the substrate (2) is square, and that each corner of the substrate (2) is provided with a relief cut (3).

39. An antenna array according to claim 38, characterized in that the antenna bodies (1) of a plurality of said dual-polarized antennas are located on a first surface of a substrate (2) of said array, a second surface of said substrate (2) being used for providing feeding circuits for connection to said dual-polarized antennas, said second surface being opposite to said first surface.

40. An electronic device comprising a dual polarized antenna according to any of claims 1-33 and/or an antenna array according to any of claims 34-39.