A multi-polarization MIMO antenna

Abstract

The invention discloses a multi-polarization MIMO antenna, comprising a circular polarization antenna and six dual-polarization antennas, wherein the circular polarization antenna is a microstrip patch cut-angle antenna with one feeding port; the dual-polarization antenna is a microstrip patch dual-polarization antenna with two feeding ports; the feeding ports of the circular polarization antenna and the six dual-polarization antennas are all fed through a feeding network. The invention is a multi-polarization MIMO antenna with reasonable structure, low mutual interference and small cross polarization.

Description

Technical Field

[0001] The present invention relates to the field of MIMO antennas, and in particular to a multi-polarization MIMO antenna. Background Art

[0002] In the communication system based on Wi-Fi technology, MIMO (Multiple-Input Multiple-output) multi-antenna technology is a key technology to improve communication quality and efficiency. Polarization diversity can be achieved using multi-polarization antenna technology, which can perform polarization multiple access communication and improve channel throughput and utilization.

[0003] At present, in the design of MIMO multi-antennas, the polarization dimension is limited to orthogonal polarization and positive and negative 45-degree polarization working modes. In order to better realize the polarization diversity multiple access communication effect of MIMO multi-antennas, it is of great significance to study the working and arrangement methods of multi-polarization MIMO antennas. Summary of the invention

[0004] The object of the present invention is to provide a multi-polarization MIMO antenna to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A multi-polarization MIMO antenna comprises a circularly polarized antenna and six dual-polarized antennas, wherein the circularly polarized antenna is a microstrip patch corner-cut antenna having one feeding port; the dual-polarized antenna is a microstrip patch dual-polarized antenna having two feeding ports; the feeding ports of the circularly polarized antenna and the six dual-polarized antennas are all fed through a feeding network.

[0007] Preferably, the circularly polarized antenna is located at the center of the multi-polarized MIMO antenna, and the dual-polarized antennas are distributed in a circular array with the circularly polarized antenna as the center.

[0008] Preferably, the polarization directions of two adjacent dual-polarization antennas differ by 30 degrees.

[0009] Preferably, the circularly polarized antenna and the dual-polarized antenna are manufactured on a double-sided copper-clad PCB board.

[0010] Preferably, a metal base plate is provided on the back side of the PCB board, a feeding network is provided on the metal base plate, an electrical connection hole is provided in the feeding port, and the feeding port is electrically connected to the feeding network on the metal base plate through the electrical connection hole.

[0011] Preferably, a metal column hole is opened at the center of the radiation unit of the circular polarization antenna and the dual polarization antenna, a metal column is installed in the metal column hole, and the metal column is electrically connected to the metal bottom plate.

[0012] Preferably, the bottom of the multi-polarized MIMO antenna is hinged on a support rod, the support rod is rotatably connected to the base, the top of the support rod is hinged with an electric telescopic rod, and the telescopic end of the electric telescopic rod is hinged to the multi-polarized MIMO antenna.

[0013] Preferably, a pair of convex edges are provided on the inner wall of the metal column hole, a groove is provided on the circumferential outer wall of the metal column, the convex edges are slidably connected to the groove, the bottom of the metal base plate is rotatably connected to a rotating sleeve, and the rotating sleeve is threadedly connected to the bottom of the metal column.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can realize a variety of polarization modes by reasonably arranging dual-polarization antennas and circularly polarized antennas, and has the characteristics of rotational symmetry, low mutual interference and small cross-polarization in each polarization mode. When the multi-polarized MIMO antenna is used as a receiving antenna in a Wi-Fi wireless transceiver system, the polarization mode of the incoming wave is determined by analyzing the signal levels of each dual-polarization antenna and circularly polarized antenna port, and then the antenna unit for receiving data is determined to realize polarization diversity multiple access communication. In addition, by adjusting the arrangement of the dual-polarized antennas, the cross-polarization characteristics of the antenna and the isolation between the antennas can be further optimized. The present invention is a multi-polarized MIMO antenna with a reasonable structure, low mutual interference and small cross-polarization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A top view of a multi-polarization MIMO antenna

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of a multi-polarization MIMO antenna;

[0017] Figure 3 A schematic diagram of the installation structure of a multi-polarization MIMO antenna;

[0018] Figure 4 The figure is a schematic diagram of the installation structure of a metal column in a multi-polarization MIMO antenna.

[0019] In the figure: 1-circular polarization antenna, 2-dual polarization antenna, 3-metal column, 4-base, 5-feeding port, 6-matching branch, 7-PCB board, 8-electrical connection hole, 9-metal bottom plate, 10-support rod, 11-electric telescopic rod, 12-metal column hole, 13-convex edge, 14-groove, 15-swivel sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 4 , the present invention provides a technical solution:

[0022] A multi-polarization MIMO antenna comprises a circularly polarized antenna 1 and six dual-polarized antennas 2, wherein the circularly polarized antenna 1 is a microstrip patch corner-cut antenna having a feeding port 5; the dual-polarized antenna 2 is a microstrip patch dual-polarized antenna having two feeding ports 5; the feeding ports 5 of the circularly polarized antenna 1 and the six dual-polarized antennas 2 are all fed through a feeding network.

[0023] Multi-polarization can be achieved by reasonably distributing the circularly polarized antenna 1 and the dual-polarized antenna 2. When the multi-polarized MIMO antenna is used as a receiving antenna in a Wi-Fi wireless transceiver system, the polarization mode of the incoming wave is determined by analyzing the signal levels of each dual-polarized antenna and circularly polarized antenna port, and then the antenna unit for receiving data is determined to achieve polarization diversity multiple access communication.

[0024] Preferably, the circularly polarized antenna 1 is located at the center of the multi-polarized MIMO antenna, and the dual-polarized antennas 2 are distributed in a circular array with the circularly polarized antenna 1 as the center.

[0025] The arrangement of the circularly polarized antenna 1 and the dual-polarized antenna 2 has the characteristics of rotational symmetry, and the mutual interference between the polarization modes is low and the cross polarization is small.

[0026] Preferably, the polarization directions of two adjacent dual-polarized antennas 2 differ by 30 degrees.

[0027] Impedance matching can be achieved by adjusting the matching branches 6 of each feeding port 5 .

[0028] Preferably, the circularly polarized antenna 1 and the dual-polarized antenna 2 are manufactured on a double-sided copper-clad PCB board 7 .

[0029] The antenna is manufactured on a double-sided copper-clad PCB board 7, and has a high degree of integration and high stability.

[0030] Preferably, a metal base plate 9 is provided on the back of the PCB board 7 , a feeding network is provided on the metal base plate 9 , an electrical connection hole 8 is provided in the feeding port 5 , and the feeding port 5 is electrically connected to the feeding network on the metal base plate 9 through the electrical connection hole 8 .

[0031] Each feeding port 5 is fed by a feeding network on the metal base plate 9 .

[0032] Preferably, a metal column hole 12 is opened at the center of the radiation unit of the circular polarization antenna 1 and the dual polarization antenna 2 , a metal column 3 is installed in the metal column hole 12 , and the metal column 3 is electrically connected to the metal bottom plate 9 .

[0033] The metal column 3 can improve the polarization characteristics and radiation characteristics of the circular polarization antenna 1 and the dual-polarization antenna 2 .

[0034] Preferably, the bottom of the multi-polarization MIMO antenna is hinged on a support rod 10, the support rod 10 is rotatably connected to the base 4, the top of the support rod 10 is hinged with an electric telescopic rod 11, and the telescopic end of the electric telescopic rod 11 is hinged to the multi-polarization MIMO antenna.

[0035] The tilt angle of the multi-polarized MIMO antenna can be adjusted by controlling the extension and retraction of the electric telescopic rod 11 , and the direction of the multi-polarized MIMO antenna can be controlled by rotating the support rod 10 .

[0036] Preferably, a pair of convex edges 13 are provided on the inner wall of the metal column hole 12, a groove 14 is provided on the circumferential outer wall of the metal column 3, the convex edge 13 is slidably connected to the groove 14, and the bottom of the metal base plate 9 is rotatably connected with a rotating sleeve 15, and the rotating sleeve 15 is threadedly connected to the bottom of the metal column 3.

[0037] By rotating the rotating sleeve 15 under the action of thread transmission, the height of the metal column 3 can be adjusted.

[0038] The working principle of the present invention is: a multi-polarization mode can be realized by reasonably distributing the circular polarization antenna 1 and the dual-polarization antenna 2. When the multi-polarization MIMO antenna is used as a receiving antenna in a Wi-Fi wireless transceiver system, the polarization mode of the incoming wave is determined by analyzing the signal levels of each dual-polarization antenna and circular polarization antenna port, and then the antenna unit receiving the data is determined to realize polarization diversity multiple access communication. The arrangement of the circular polarization antenna 1 and the dual-polarization antenna 2 has the characteristics of rotational symmetry, and the mutual interference of each polarization mode is low and the cross polarization is small. Impedance matching can be achieved by adjusting the matching branch 6 of each feeding port 5. The antenna is processed and manufactured on a double-sided copper-clad PCB board 7, with a high degree of integration and high stability. Feeding each feeding port 5 is realized by a feeding network on a metal base plate 9. The metal column 3 can improve the polarization characteristics and radiation characteristics of the circular polarization antenna 1 and the dual-polarization antenna 2. The tilt angle of the multi-polarized MIMO antenna can be adjusted by controlling the extension and retraction of the electric telescopic rod 11, and the direction of the multi-polarized MIMO antenna can be controlled by rotating the support rod 10. The height of the metal column 3 can be adjusted by rotating the rotating sleeve 15 under the action of the threaded transmission.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-polarization MIMO antenna, characterized in that: The invention comprises a circularly polarized antenna (1) and six dual-polarized antennas (2), wherein the circularly polarized antenna (1) is a microstrip patch corner-cut antenna having one feeding port (5); the dual-polarized antenna (2) is a microstrip patch dual-polarized antenna having two feeding ports (5); the feeding ports (5) of the circularly polarized antenna (1) and the six dual-polarized antennas (2) are all fed through a feeding network; The circularly polarized antenna (1) is located at the center of the multi-polarized MIMO antenna, and the dual-polarized antennas (2) are distributed in a circular array with the circularly polarized antenna (1) as the center; The polarization directions of two adjacent dual-polarization antennas (2) differ by 30 degrees.

2. The multi-polarization MIMO antenna according to claim 1, characterized in that: The circularly polarized antenna (1) and the dual-polarized antenna (2) are manufactured on a double-sided copper-clad PCB board (7).

3. A multi-polarization MIMO antenna according to claim 2, characterized in that: A metal base plate (9) is provided on the back of the PCB board (7), a feeding network is provided on the metal base plate (9), an electrical connection hole (8) is provided in the feeding port (5), and the feeding port (5) is electrically connected to the feeding network on the metal base plate (9) via the electrical connection hole (8).

4. The multi-polarization MIMO antenna according to claim 3, characterized in that: A metal column hole (12) is opened at the center of the radiation unit of the circular polarization antenna (1) and the dual polarization antenna (2), a metal column (3) is installed in the metal column hole (12), and the metal column (3) is electrically connected to the metal bottom plate (9).

5. The multi-polarization MIMO antenna according to claim 1, characterized in that: The bottom of the multi-polarized MIMO antenna is hinged on a support rod (10), the support rod (10) is rotatably connected to a base (4), the top of the support rod (10) is hinged with an electric telescopic rod (11), and the telescopic end of the electric telescopic rod (11) is hinged to the multi-polarized MIMO antenna.

6. The multi-polarization MIMO antenna according to claim 4, characterized in that: A pair of convex edges (13) are provided on the inner wall of the metal column hole (12), a groove (14) is provided on the circumferential outer wall of the metal column (3), the convex edge (13) and the groove (14) are slidably connected, and a rotating sleeve (15) is rotatably connected to the bottom of the metal bottom plate (9), and the rotating sleeve (15) is threadedly connected to the bottom of the metal column (3).

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