Dual-polarization omnidirectional array type wireless connection system

Abstract

The utility model provides a dual polarization omnidirectional array type wireless connection system, comprising an antenna array radiator and a power divider, the antenna array radiator is cylindrical, the antenna array radiator comprises a plurality of array antenna units, and the plurality of array antenna units are arranged at intervals around the cylindrical antenna array radiator; the power divider is arranged on the inner ring of the cylindrical antenna array radiator, and the power divider is connected with the plurality of array antenna units. Annular combination is carried out by adopting a directional antenna array mode, so that the high-gain omnidirectional characteristic of the antenna is realized, the dual-polarization characteristic of the same antenna is also realized, and the performance is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of antenna communication, specifically relates to a kind of bipolar omnidirectional array type wireless connection system. BACKGROUND

[0002] With the development of the times, wireless communication has become the necessary communication way in people's daily life. Interconnection can be realized through wireless WIFI.

[0003] The current conventional wifi antenna generally adopts built-in pcb board design or external whip rod sleeve design. The built-in pcb antenna has low gain, is greatly affected by environment, and has low antenna efficiency, so it is less used in general equipment, and is only used in some high appearance requirements and small size conditions. The whip rod sleeve antenna can realize high gain omnidirectional characteristics through height adjustment, and is a common design of current wifi router, but its polarization can only be single vertical polarization, and the appearance is not beautiful.

[0004] Therefore, it is necessary to provide a new technical scheme. UTILITY MODEL CONTENT

[0005] To solve the technical problems in the prior art, the utility model discloses a kind of bipolar omnidirectional array type wireless connection system, and the specific technical scheme is as follows:

[0006] The utility model provides a kind of bipolar omnidirectional array type wireless connection system, it includes antenna array radiator and power divider,

[0007] The antenna array radiator is cylindrical, and the antenna array radiator includes a plurality of array antenna units, and the plurality of array antenna units are arranged at intervals around the cylindrical antenna array radiator.

[0008] The power divider is arranged in the inner circle of the cylindrical antenna array radiator, and the power divider is connected with the plurality of array antenna units.

[0009] Further, the antenna array radiator is a cylindrical shape formed by bending a square PCB board, the array antenna unit is three, and the three array antenna units are arranged at intervals of 120 ° around the cylindrical antenna array radiator,

[0010] The power divider is a three-equal-division power divider, and the three array antenna units are respectively connected to the three-equal-division power divider.

[0011] Further, it further includes a reflector, and the reflector is a cylindrical metal cylinder formed by a metal plate,

[0012] The antenna array radiator is connected to the outer circle of the reflector, and the three-equal-division power divider is connected to the inner circle of the reflector, or

[0013] the antenna array radiator is connected to the inner ring of the reflector, the three-equal-division power divider is connected to the inner ring of the antenna array radiator,

[0014] the plane of the three-equal-division power divider is perpendicular to the axis of the cylindrical metal cylinder.

[0015] Further, the size of the metal plate is greater than 1.0λ, the outer diameter of the cylindrical metal cylinder is 51mm, and the wall thickness of the cylindrical metal cylinder is 1mm,

[0016] the square PCB board is a square PCB board, the thickness of the PCB board is 0.2mm, and the size of the PCB board is 0.45λ, wherein λ is the free space wavelength of the antenna operating point.

[0017] Further, the antenna array radiator and the reflector are connected by a fastener, or the antenna array radiator and the reflector are integrally arranged.

[0018] Further, each array antenna unit includes two antenna group subunits,

[0019] The two antenna group subunits are arranged in parallel along the axis of the cylindrical metal cylinder, the two antenna group subunits are connected by a horizontal polarization feed network, and the two antenna group subunits are connected by a vertical polarization feed network.

[0020] Further, the horizontal polarization feed network and the vertical polarization feed network are each connected with an impedance adjustment block.

[0021] Further, the antenna array radiator is provided with a microstrip line on each of the two adjacent edges, wherein the horizontal edge microstrip line is used for horizontal polarization, and the horizontal polarization feed network is connected with the horizontal edge microstrip line, and wherein the vertical edge microstrip line is used for vertical polarization, and the vertical polarization feed network is connected with the vertical edge microstrip line.

[0022] Further, the three-equal-division power divider is two superimposed circular double-sided boards, wherein one of the circular double-sided boards is connected with the vertical polarization feed network of each of the three array antenna units, and the other of the circular double-sided boards is connected with the horizontal polarization feed network of each of the three array antenna units.

[0023] Further, each circular double-sided board has a feed port and three output ports, the feed port is arranged at the center of the circular double-sided board, and the three output ports are distributed on the circumferential edge of the circular double-sided board.

[0024] The three output ports of one of the circular double-sided boards are connected with the vertical polarization feed network of each of the three array antenna units one by one, and the three output ports of the other of the circular double-sided boards are connected with the horizontal polarization feed network of each of the three array antenna units one by one.

[0025] On each circular dual-plane panel, the feed port is connected with the output port through a power divider microstrip line.

[0026] The utility model has the following beneficial effects:

[0027] The bipolar omnidirectional array type wireless connection system adopts the mode of directional antenna array to realize annular combination, thereby realizing high-gain omnidirectional characteristics of the antenna, and realizing the characteristics of dual polarization of the same antenna, and has good performance, and can be combined with the PCBA board of the equipment to form a whole.

[0028] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor.

[0030] Figure 1 It is a structure schematic view of the bipolar omnidirectional array type wireless connection system of the utility model;

[0031] Figure 2 It is a structure schematic view of the reflector in the utility model; Figure 1 It is a result schematic view of the antenna array radiator in the utility model;

[0032] Figure 3 It is a structure schematic view of the reflector in the utility model; Figure 1 It is a structure schematic view of the three equal power dividers in the utility model;

[0033] Figure 4 It is a structure schematic view of the three equal power dividers in the utility model; Figure 1 It is a structure schematic view of the three equal power dividers in the utility model;

[0034] Figure 5 It is a connection schematic view of the three equal power dividers and array antenna units of the utility model;

[0035] Figure 6 It is a standing wave diagram of the bipolar omnidirectional array type wireless connection system of the utility model;

[0036] Figure 7 It is a three-dimensional direction diagram of the center frequency point of the bipolar omnidirectional array type wireless connection system of the utility model;

[0037] Figure 8 It is a horizontal plane direction diagram of the center frequency point of the bipolar omnidirectional array type wireless connection system of the utility model.

[0038] Wherein, 1-antenna array radiator, 11-PCB substrate, 111-aperture, 12-array antenna unit, 121-antenna group subunit, 13-horizontal polarization feed network, 14-vertical polarization feed network, 15-impedance adjustment block, 2-reflector, 21-soldering needle perforation, 3-three-equal-division power divider, 31-feed port, 32-output port, 33-power divider microstrip line. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0040] In the description of the present application, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0041] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The present application mainly adopts directional antennas for combination to realize high-gain omnidirectional characteristics of the antenna, and further realizes horizontal / vertical polarization dual polarization function of the antenna in combination with feed of different positions.

[0043] Please refer to Figures 1 to 7 , Figure 1 It is a structural schematic view of the dual-polarized omnidirectional array wireless connection system of the present application; Figure 2 It is Figure 1 a result schematic view of the antenna array radiator in the present application; Figure 3 It is Figure 1 a structural schematic view of the reflector in the present application; Figure 4 It isFigure 1 Structure diagram of the three-equal-credit power divider; Figure 5 Connection diagram of the three-equal-credit power divider and the array antenna unit of the utility model; Figure 6 Standing wave diagram of the dual-polarized omnidirectional array type wireless connection system of the utility model; Figure 7 Three-dimensional directional diagram of the center frequency point of the dual-polarized omnidirectional array type wireless connection system of the utility model; Figure 8 Horizontal plane directional diagram of the center frequency point of the dual-polarized omnidirectional array type wireless connection system of the utility model.

[0044] The dual-polarized omnidirectional array type wireless connection system of the utility model takes WIFI 2.4G as the design basis, and the working frequency band is 2400-2500MHz.

[0045] As shown in Figure 1 The wireless connection system of the utility model mainly comprises an antenna array radiator 1, a reflector 2 and a three-equal-credit power divider 3.

[0046] Please refer to Figure 2 The antenna array radiator 1 is in a cylindrical shape. The antenna array radiator 1 adopts a square PCB board 11 of Fr-4 base material, and the opposite two edges of the PCB board 11 are curved close to each other, so that the PCB board is curved into a cylindrical shape. The antenna array radiator 1 comprises three array antenna units 12; the three array antenna units 12 are arranged at intervals of 120 degrees around the cylindrical antenna array radiator 1. In this embodiment, the PCB board is square, the thickness of the PCB board is 0.2mm, and the size of the PCB board is 0.45λ, wherein λ is the free space wavelength of the antenna operating point. In other embodiments, the thickness and size of the PCB board can be determined according to actual conditions.

[0047] As shown in Figures 1 to 3 The reflector 2 is a cylindrical metal cylinder surrounded by a metal plate, the size of the metal plate is greater than 1.0λ, the outer diameter of the cylindrical metal cylinder is 51mm, and the wall thickness is 1mm. The reflector 2 of the utility model is formed and processed by taking aluminum as the base material, the reflector 2 and the antenna array radiator 1 are connected through a feed line, and there are six welding needle perforations 21 at the corresponding positions of the feed point positions of the antenna group sub-units 121 of the antenna array radiator 1, so as to weld the antenna array radiator 1 and the three-equal-credit power divider 3. In other embodiments, the size of the metal plate, the outer diameter and the wall thickness of the cylindrical metal cylinder can be determined according to actual conditions.

[0048] Please refer to Figures 1 to 3In the embodiment, the square PCB plate is bent around the outer ring of the reflector 2 along the periphery of the reflector 2, the three-equal-division power divider 3 is connected to the inner ring of the reflector 2, and the three-equal-division power divider 3 is connected to three array antenna units 12 respectively. The plane of the three-equal-division power divider 3 is perpendicular to the axial direction of the cylindrical metal cylinder. The utility model takes microstrip directional antenna as the basis, uses square PCB plate as the radiator of the antenna, and uses metal plate as the reflector of the antenna, so as to form the basic antenna unit of the antenna system.

[0049] Please continue to refer to Figure 2 Each array antenna unit 12 comprises two antenna group subunits 121, the two antenna group subunits 121 are arranged in parallel along the axial direction of the cylindrical metal cylinder, the two antenna group subunits 121 are connected through horizontal polarization feed network 13, and the two antenna group subunits 121 are connected through vertical polarization feed network 14. The horizontal polarization feed network 13 has a horizontal polarization port, and the vertical polarization feed network 14 has a vertical polarization port. The horizontal polarization port and the vertical polarization port are both feed ports of the array antenna unit. The utility model adopts three array antenna units 12, which are arranged in a ring with an interval of 120 degrees and distributed on the outside of the cylindrical metal cylinder. The cylindrical metal cylinder serves as the reflecting surface and the fixing support of the antenna array radiator. The three array antenna units 12 are designed on a PCB plate with Fr-4 as the base material. In order to realize the bending on the cylindrical metal cylinder, a 0.2mm thick plate material is used for design.

[0050] The utility model groups the two antenna group subunits to further improve the gain of the directional antenna. The interval between the two antenna group subunits of each array antenna unit is about 0.89λ, so as to realize the superposition of the antenna directional diagram. The two antenna group subunits are connected through the feed network. The square radiator edge microstrip line is designed with 100Ω microstrip line, so that 50Ω feed can be realized at the center point of the microstrip line. There is a microstrip line on each of the adjacent two edges of the square radiator. The horizontal polarization feed network 13 is connected with the horizontal edge microstrip line, and the vertical polarization feed network 14 is connected with the vertical edge microstrip line. The horizontal edge microstrip line is used for horizontal polarization, and the vertical edge microstrip line is used for vertical polarization. The horizontal polarization is fed at the center of the microstrip line. In the vertical polarization direction, in order to realize the current superposition and ensure the superposition of the directional diagram, the total length of the microstrip lines on both sides of the vertical polarization feed point is different by about 0.5λg (working wavelength). Thus, the horizontal / vertical polarization of the antenna can be realized, and 50Ω feed can be performed at the same time, so as to form the antenna group subunit.

[0051] Further, impedance adjustment blocks 15 are connected to the horizontal polarization feed network 13 and the vertical polarization feed network 14, and the position and size are optimized to adjust the performance of the antenna group subunit. The three antenna array units of the utility model are distributed in a ring shape with an interval of 120 degrees to form an entire antenna array radiator, the radiator is designed with FR-4 of 0.2mm thickness, single-side copper coating, forming an array antenna unit and a feed network, and meanwhile, it can be well bent to be fixed on a cylindrical metal cylinder. Figure 1 As shown in the drawings, in this embodiment, by setting fixing holes (not shown) on the reflector, by opening holes 111 on the antenna array radiator 1 at positions corresponding to the fixing holes, and by adopting fasteners to cooperate with the holes 111 and the fixing holes, the antenna array radiator 1 and the reflector 2 can be fixed together tightly, and the gap between the two is about 0.03λ. The fastener is a plastic screw. In another embodiment, the antenna array radiator and the reflector are integrally arranged.

[0052] Please refer to Figure 4 and Figure 5 , the three-equal-division power divider 3 is two superimposed circular double panels, each of which has a feed port 30 and three output ports, the feed port 30 is arranged at the center of the circular double panel, and the three output ports are distributed at the circumferential edge of the circular double panel. On each circular double panel, the feed port 30 is connected with the three output ports through a power divider microstrip line 33. Specifically, for the convenience of description, one of the circular double panels is marked as an upper circular double panel 31, and the other circular double panel is marked as a lower circular double panel 32, the three output ports 311 of the upper circular double panel 31 are connected with the vertical polarization feed network 14 of the three array antenna units one by one, and the three output ports 321 of the lower circular double panel 32 are connected with the horizontal polarization feed network 13 of the three array antenna units one by one.

[0053] One side of each circular double panel of the utility model is covered with copper as a metal ground, and the other side is a microstrip line, two circular double panels, one vertical polarization port, and one horizontal polarization port. The center of the three-equal-division power divider board is the feed port of the antenna, which can be connected with a coaxial connector or a coaxial line. The three output ports of each circular double panel correspond to the ports on the antenna array radiator of the same polarization respectively, and are fixed by welding, so as to realize the design of the dual-polarized omnidirectional array wireless connection system.

[0054] Please continue to refer to Figure 1 In this embodiment, the antenna array radiator 1 is located at the outer ring of the cylindrical metal cylinder. In other embodiments, the antenna array radiator 1 is located at the inner ring of the cylindrical metal cylinder, and the three-equal-division power divider is connected to the inner ring of the antenna array radiator.

[0055] Please refer toFigure 6 , Figure 6 The voltage standing wave ratio (VSWR) diagram of the dual-polarization port of the antenna system is shown below. Figure 6 It can be seen that the antenna standing wave ratio is less than 2.0 in the 2.4G (2400-2500MHz) operating frequency band.

[0056] Please see Figure 7 , Figure 7 This is a 3D radiation diagram of the antenna; Figure 8 This is the 2D radiation pattern of the antenna in the horizontal plane, from which... Figure 7 and 8 It can be seen that the antenna's horizontal plane non-circularity is less than 5dB. This design can achieve an overall antenna horizontal plane non-circularity of less than + / -2.5dB. The dual-polarization port isolation is greater than 25dB, and the antenna gain is greater than 6dBi. Dual-polarization characteristics are achieved, while also satisfying omnidirectional coverage.

[0057] The antenna system of this invention is based on microstrip directional antennas. The antenna array radiator is a square PCB board, and the size of the antenna array radiator is 0.45λ of the wavelength of the center frequency (2450MHz), forming the basic unit of the antenna.

[0058] This invention employs a binary array configuration, with the two antenna sub-units spaced approximately 0.89λ apart. The two antenna sub-units are connected by a 100Ω microstrip line. The horizontal polarization is fed at the center of the microstrip line, and the lengths of the microstrip lines at the two ends of the vertical polarization feed point differ by approximately 0.5λg (2450MHz operating wavelength).

[0059] This invention relates to a dual-polarized omnidirectional array wireless connection system. The system is designed with a PCB microstrip directional antenna as the basic unit, achieving dual-polarization and high-gain characteristics for each antenna unit. By assembling two elements into an antenna array, the antenna gain is further enhanced. To achieve omnidirectional characteristics in the horizontal direction, three antenna array units are arranged in a rotating configuration, spaced 120 degrees apart on the outside of a cylindrical metal tube. The cylindrical metal tube serves as the reflector surface for the qualitative antenna and as a fixed support. To better conform to the cylindrical metal tube, the antenna array radiator is designed with a 0.2mm thick FR-4 substrate, allowing for good bending and evenly spaced attachment to the cylindrical metal tube surface. Holes are drilled in the cylindrical metal tube, and plastic screw posts are used for fixing, thus securing the FR-4 substrate of the radiator to the cylindrical metal tube. The cylindrical metal tube adopts an internal hollow design and contains two three-way power dividers, which are connected to the vertical / horizontal ports of the three array antenna elements respectively, thereby achieving dual-polarization omnidirectional characteristics.

[0060] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, a person skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0061] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present application.

Claims

1. A dual-polarized omni-directional array wireless connectivity system, characterized by, The antenna array radiator comprises an antenna array radiator and a power divider, The antenna array radiator is in a cylindrical shape, and the antenna array radiator comprises a plurality of array antenna units, and the plurality of array antenna units are arranged at intervals around the cylindrical antenna array radiator; The power divider is arranged at the inner ring of the cylindrical antenna array radiator, and the power divider is connected with the plurality of array antenna units.

2. The dual-polarized omni-directional array wireless connection system according to claim 1, wherein The antenna array radiator is in a cylindrical shape formed by bending a square PCB board, the array antenna units are three, and the three array antenna units are arranged at intervals of 120° around the cylindrical antenna array radiator, The power divider is a three-way power divider, and the three array antenna units are respectively connected with the three-way power divider.

3. The dual-polarized omni-array wireless connectivity system of claim 2, wherein, The system further comprises a reflector, and the reflector is a cylindrical metal tube formed by a metal plate, The antenna array radiator is connected to the outer ring of the reflector, and the three-way power divider is connected to the inner ring of the reflector, or The antenna array radiator is connected to the inner ring of the reflector, and the three-way power divider is connected to the inner ring of the antenna array radiator, The plane of the three-way power divider is perpendicular to the axial direction of the cylindrical metal tube.

4. The dual-polarized omni-directional array wireless connection system according to claim 3, wherein The size of the metal plate is greater than 1.0λ, the outer diameter of the cylindrical metal tube is 51 mm, and the wall thickness of the cylindrical metal tube is 1 mm, The square PCB board is a square PCB board, the thickness of the PCB board is 0.2 mm, and the size of the PCB board is 0.45λ, wherein λ is the free space wavelength of the antenna operating point.

5. The dual-polarized omni-array wireless connectivity system of claim 3, wherein, The antenna array radiator and the reflector are connected by fasteners, or the antenna array radiator and the reflector are integrally arranged.

6. The dual-polarized omni-array wireless connectivity system of claim 3, wherein, Each array antenna unit comprises two antenna group subunits, Along the axial direction of the cylindrical metal tube, the two antenna group subunits are arranged in parallel in the up-down direction, the two antenna group subunits are connected by a horizontal polarization feed network, and the two antenna group subunits are connected by a vertical polarization feed network.

7. The dual-polarized omni-array wireless connectivity system of claim 6, wherein, Impedance adjustment blocks are connected to the horizontal polarization feed network and the vertical polarization feed network.

8. The dual-polarized omni-array wireless connectivity system of claim 6, wherein, The antenna array radiator is provided with microstrip lines on two adjacent edges, wherein the horizontal edge microstrip lines are used for horizontal polarization, the horizontal polarization feed network is connected with the horizontal edge microstrip lines, wherein the vertical edge microstrip lines are used for vertical polarization, and the vertical polarization feed network is connected with the vertical edge microstrip lines.

9. The dual-polarized omni-directional array wireless connection system according to claim 2, wherein The three-way power divider is two circular double-sided boards arranged in a stack, wherein one circular double-sided board is respectively connected with the vertical polarization feed network of the three array antenna units, and the other circular double-sided board is respectively connected with the horizontal polarization feed network of the three array antenna units.

10. The dual-polarized omni-directional array wireless connection system according to claim 9, wherein Each circular dual polarized panel has a feed port and three output ports, the feed port is arranged at the center of the circular dual polarized panel, and the three output ports are distributed at the circumferential edge of the circular dual polarized panel, The three output ports of one of the circular dual polarized panels are connected to the vertical polarization feed network of the three array antenna units one by one, and the three output ports of the other of the circular dual polarized panels are connected to the horizontal polarization feed network of the three array antenna units one by one, On each circular dual polarized panel, the feed port is connected to the output ports through a power divider microstrip line.

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