CN106785413B

CN106785413B - Indoor AP intelligence MIMO antenna

Info

Publication number: CN106785413B
Application number: CN201710159941.3A
Authority: CN
Inventors: 雷传球; 刘晓钰; 傅强
Original assignee: Axilspot Communication Co ltd
Current assignee: Axilspot Communication Co ltd
Priority date: 2017-03-17
Filing date: 2017-03-17
Publication date: 2023-04-07
Anticipated expiration: 2037-03-17
Also published as: CN106785413A

Abstract

The invention discloses an indoor AP intelligent MIMO antenna, which comprises: the circular medium plate is provided with six first slots and three second slots; correspondingly inserting six inserting medium plates I and three inserting medium plates II in the inserting grooves; several metal patterns disposed on the dielectric plates. And a metal pattern is respectively arranged on the front surface and the back surface of the circular medium plate and between two adjacent slots. The metal patterns on the two opposite sides of each slot II are symmetrically distributed by taking the corresponding slot II as a symmetry axis and are metal patterns I; and the metal pattern between every two adjacent slots I is a metal pattern II. The metal patterns on the two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis, and are defined as a third metal pattern; and the metal pattern between every two adjacent slots I is defined as a metal pattern IV. And the front surface and the back surface of each first plug-in medium plate are respectively provided with a metal pattern six and a metal pattern seven.

Description

Indoor AP intelligence MIMO antenna

Technical Field

The invention relates to an antenna, in particular to an indoor AP intelligent MIMO antenna, and specifically relates to a miniaturized, dual-band and high-efficiency wireless indoor AP intelligent 3 x 3MIMO antenna.

Background

An AP (wireless access point) is a HUB in a conventional wired network, and is also a device most commonly used for establishing a small wireless local area network. The AP acts as a bridge connecting the network and the wireless network, and mainly functions to connect the wireless network clients together and then to access the wireless network to the ethernet. Most wireless APs support functions of multi-user access, data encryption, multi-rate transmission and the like, and some products provide perfect wireless network management functions. For a small-range wireless local area network such as a home or an office, wireless access to all computers can be realized by only one wireless AP.

The indoor coverage of the AP is generally 30m to 100m, and a plurality of manufacturers can interconnect AP products to increase the coverage area of the WLAN. Just as the cell phone can roam between the base stations, the wlan client can also roam between the APs because each AP has a limited coverage area.

With the rapid development of wireless technology, wired network layouts are less and less, and in order to realize a high-throughput wireless network in an indoor complex environment, an indoor AP intelligent MIMO antenna needs to be designed. MIMO: multiple-Input Multiple-Output, representing Multiple-Input Multiple-Output. The design of an antenna is closely related to the wireless communication throughput, and its radiation pattern, gain, antenna bandwidth, impedance matching, size, structure and cost are all important factors affecting the design of the antenna. Therefore, the indoor AP intelligent MIMO antenna needs to meet the requirements that a radiation pattern can be switched in three sectors, a dual-frequency 3 x 3MIMO antenna is formed in each sector, the efficiency is high, the frequency band is wide, the miniaturization is realized, the structure is simple, the installation is easy, and the like. The intelligent antenna can improve the throughput of a wireless network, improve the anti-interference capability, expand the network coverage of the azimuth plane, meet the increasing communication frequency band in a wide frequency band, and has the advantages of simple structure, miniaturization, beautiful appearance of a product, low processing cost, easy installation, and low installation error and installation cost.

Disclosure of Invention

In order to solve the technical problems, the invention provides an indoor AP intelligent MIMO antenna which has the characteristics of simple structure, easiness in installation, low cost, wide frequency band and high efficiency.

The solution of the invention is: an indoor AP intelligent MIMO antenna comprises a circular dielectric plate and a plurality of metal patterns arranged on the circular dielectric plate;

the circular medium plate is provided with six first slots and three second slots; the six first slots and the three second slots are annularly arranged, the annular diameter formed by the three second slots is smaller than that formed by the six first slots, the six first slots and the three second slots are radially distributed by the center of the circular dielectric slab, and two first slots are arranged between every two adjacent second slots;

a metal pattern is arranged on the front surface of the circular dielectric slab and between two adjacent slots respectively; the metal patterns on the two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis and are defined as the first metal patterns; defining a metal pattern between every two adjacent slots I as a metal pattern II;

a metal pattern is arranged on the back surface of the circular dielectric slab and between two adjacent slots respectively; the metal patterns on two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis, and are defined as a third metal pattern; a metal pattern between two adjacent slots I is defined as a metal pattern IV; in the area on the same vertical line vertical to the circular dielectric slab, a metal pattern I on the front side and a metal pattern II on the back side correspond to each other to form a group of first metal pattern groups, and a metal pattern II on the front side and a metal pattern IV on the back side correspond to each other to form a group of second metal pattern groups; the back surface of the circular dielectric slab is also provided with a closed metal pattern five which takes the circle center of the circular dielectric slab as the center, and the metal pattern five is positioned in a ring formed by the annularly arranged three slots II;

the indoor AP intelligent MIMO antenna also comprises six plug-in medium plates I respectively plugged in the six first slots and three plug-in medium plates II respectively plugged in the three second slots; the front surface and the back surface of each plug-in medium plate I are respectively provided with a metal pattern six and a metal pattern seven, and the metal pattern six and the metal pattern seven form a third metal pattern group; a metal pattern eight and a metal pattern nine are respectively arranged on the front surface and the back surface of each plug-in medium plate II, and the metal pattern eight and the metal pattern nine form a fourth metal pattern group;

in the same metal pattern group, two metal patterns have common metallized through holes, the vertical projections of the respective metal transmission strip lines of the two metal patterns are overlapped, the respective antenna active oscillators of the two metal patterns are symmetrically arranged by taking the corresponding metal transmission strip lines as symmetry axes, and only in the third metal pattern group, the tail ends of the antenna active oscillators of the six metal patterns are provided with metal strip sections which respectively extend towards two opposite directions and are inclined.

In a further improvement of the above scheme, in the same metal pattern group, a metal sheet for passing through the corresponding metalized via hole is arranged on the front surface of the corresponding dielectric plate.

As a further improvement of the scheme, the three groups of second metal pattern groups on the circular dielectric slab form included angles of 120 degrees between every two metal pattern groups.

As a further improvement of the above solution, all the metal patterns are provided on the corresponding dielectric sheet by printing.

As a further improvement of the above scheme, the metal pattern five is a metal pattern in a regular hexagon shape.

As a further improvement of the above scheme, one end of a metal transmission strip line of the second metal pattern group is provided with an antenna feed welding area of the second metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the second metal pattern group is provided with an antenna reflector, and the antenna reflector of the third metal pattern group is arranged on the fourth metal pattern group; and one end of the metal transmission strip line of the metal pattern six is provided with an antenna feed welding area of a third metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the third metal pattern group is provided with an antenna reflector, and the antenna reflector of the third metal pattern group is arranged on the metal pattern seven.

As a further improvement of the above scheme, one end of a metal transmission strip line of the first metal pattern is provided with an antenna feed welding area of a first metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the first metal pattern group is provided with an antenna director, and the antenna director of the first metal pattern group is arranged on the third metal pattern; one end of the metal transmission strip line of the metal pattern group III is provided with an antenna feed welding area of a fourth metal pattern group, the other end of the metal transmission strip line of the metal pattern group III is connected with a corresponding antenna active oscillator, the fourth metal pattern group is provided with an antenna director, and the antenna director of the fourth metal pattern group is arranged on the metal pattern group III.

As a further improvement of the scheme, the six metal patterns are divided into two groups which are arranged at intervals, and every two of the three metal patterns which are arranged at intervals form an included angle of 120 degrees.

As a further improvement of the scheme, the six plug-in medium plates are divided into two groups and distributed at intervals, and each two of the three plug-in medium plates distributed at intervals form an included angle of 120 degrees.

As a further improvement of the above scheme, the indoor AP intelligent MIMO antenna receives six radio frequency signals of six frequency bands:

the three groups of second metal pattern groups receive a path of radio frequency signal I;

the six groups of third metal pattern groups are arranged at intervals in two types, wherein one group of three groups of third metal pattern groups arranged at intervals receive a radio frequency signal II, and the other group of three groups of third metal pattern groups arranged at intervals receive a radio frequency signal III;

the six groups of first metal pattern groups are arranged at intervals in two types, wherein one group of three groups of first metal pattern groups arranged at intervals receives a radio frequency signal IV, and the other group of three groups of first metal pattern groups arranged at intervals receives a radio frequency signal V;

and the three fourth metal pattern groups receive a radio frequency signal six.

Through the design, the performance parameters such as the impedance characteristic, the antenna gain, the standing-wave ratio, the isolation degree, the E-plane and H-plane 3dB lobe width and the like of the outdoor wireless point-to-point directional AP antenna meet the requirements, so that the indoor AP intelligent MIMO antenna with low cost, high communication efficiency, high communication capacity and high anti-interference performance is obtained. The working frequency range of the AP intelligent MIMO AP antenna is 2.412-2.484GHz 5.15-5.85 GHz; the gain of the 2.4G frequency band is more than 4.5dBi; the standing-wave ratio is less than 2; the port isolation is less than-20 dB; the characteristic impedance is 50 Ω; the gain of the 5.0G frequency band is more than 5.0dBi; the standing-wave ratio is less than 2; the port isolation is less than-22 dB; the characteristic impedance is 50 Ω; the connector mode is that IPX takes the radio frequency shielding line, and shielding line length is optional.

Drawings

Fig. 1 is a perspective view of an indoor AP smart MIMO antenna according to the present invention, in which a plug-in dielectric plate is specially subjected to perspective processing in order to embody a better view effect.

Fig. 2 is a perspective view of another perspective of the antenna of fig. 1.

Fig. 3 is a front view of the circular dielectric plate of the antenna of fig. 1.

Fig. 4 is a back structural view of the circular dielectric plate in fig. 3.

Fig. 5 is a front structural view of the first plug dielectric plate of the antenna in fig. 1.

Fig. 6 is a rear view of the first interposer in fig. 5.

Fig. 7 is a front view of the second patch dielectric plate of the antenna of fig. 1.

Fig. 8 is a rear view of the second interposer in fig. 7.

Fig. 9 is a diagram of a video signal transmission mode of the antenna in fig. 1.

Fig. 10a is a graph of simulation results for the antenna of fig. 1.

Fig. 10b is a graph of simulation results for the antenna of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 2 together, the indoor AP smart MIMO antenna of the present invention includes: the metal pattern structure comprises a circular dielectric slab 11, six first plugging

dielectric slabs

20, 21, 22, 23, 24 and 25 plugged on the circular dielectric slab 11, three second plugging

dielectric slabs

30, 31 and 32 and a plurality of metal patterns arranged on the circular dielectric slab 11.

The circular dielectric slab 11 is provided with six

first slots

80, 81, 82, 83, 84, 85 and three

second slots

90, 91, 92. The six slots one 80, 81, 82, 83, 84, 85 are used for plugging six plug media boards one 20, 21, 22, 23, 24, 25, and the three slots two 90, 91, 92 are used for plugging three plug media boards two 30, 31, 32, for a total of nine slots.

Nine slots are in layout design: the six

first slots

80, 81, 82, 83, 84, 85 and the three

second slots

90, 91, 92 are all arranged in a ring shape, the ring diameter formed by the three

second slots

90, 91, 92 is smaller than the ring diameter formed by the six

first slots

80, 81, 82, 83, 84, 85, and the six

first slots

80, 81, 82, 83, 84, 85 and the three

second slots

90, 91, 92 are all arranged in a radial shape at the center of the circular dielectric plate 11. Two first slots are formed between two adjacent second slots, for example, two

first slots

82 and 83 are formed between two adjacent

second slots

90 and 91 in fig. 3 and 4, two

first slots

84 and 85 are formed between two adjacent

second slots

91 and 92, and two

first slots

80 and 81 are formed between two adjacent

second slots

92 and 90.

The six slots I80, 81, 82, 83, 84 and 85 can be distributed at intervals in two groups, one group is the slots I80, 82 and 84, the other group is the slots I81, 83 and 85, and the three slots I in each group can form an included angle of 120 degrees between every two slots I. The six plugging medium plates one 20, 21, 22, 23, 24 and 25 plugged in the slot one are in the same position pattern, for example, the six plugging medium plates one 20, 21, 22, 23, 24 and 25 can be divided into two groups which are arranged at intervals, one group is the medium plates one 20, 22 and 24, the other group is the medium plates one 21, 23 and 25, and an included angle of 120 degrees can be formed between every two three medium plates in each group.

Referring to fig. 3 again, a metal pattern is disposed on the front surface of the circular dielectric plate 11 between two adjacent slots, and there are nine slots in total, so there are nine metal patterns in total. The metal patterns on two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis and are defined as a first metal pattern; and defining the metal pattern between two adjacent slots I as a metal pattern II. For example, in fig. 3, the first metal patterns on the two opposite sides of the second slot 90 are symmetrically distributed with the second slot 90 as the symmetry axis, and the second metal patterns between the

first slots

80 and 81 are different from the first metal patterns on the two opposite sides of the second slot 90, and belong to the two patterns.

Referring to fig. 4 again, a metal pattern is disposed on the back surface of the circular dielectric plate 11 and between two adjacent slots, so that there are nine slots, and thus there are nine metal patterns. The metal patterns on two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis, and are defined as a third metal pattern; and the metal pattern between every two adjacent slots I is defined as a metal pattern IV. For example, in fig. 4, the metal patterns three on the opposite sides of the slot two 90 are symmetrically distributed with the slot two 90 as a symmetry axis, and the metal pattern four between the two slot one 80 and the slot one 81 and the metal pattern three on the opposite sides of the slot two 90 are different in shape and belong to two patterns.

It should be noted that in the area perpendicular to the same vertical line of the circular dielectric slab 11, the first metal pattern on the front side and the third metal pattern on the back side correspond to each other to form a first metal pattern group, and the second metal pattern on the front side and the fourth metal pattern on the back side correspond to each other to form a second metal pattern group. Therefore, the circular dielectric sheet 11 has six sets of the first

metal pattern groups

320, 321, 322, 323, 324, 325, and three sets of the second

metal pattern groups

220, 221, 222. The three second

metal pattern groups

220, 221 and 222 on the circular dielectric plate 11 may form an included angle of 120 ° between each other. The six first

metal pattern groups

320, 321, 322, 323, 324 and 325 can be divided into two types which are arranged at intervals, one type is the first

metal pattern group

320, 322 and 324, the other type is the first

metal pattern group

321, 323 and 325, and three first metal pattern groups in each type can form an included angle of 120 degrees between every two metal pattern groups.

On the back of the circular dielectric slab 11, a metal pattern five which is centered at the center of the circular dielectric slab 11 and is in a closed shape is further provided, and the metal pattern five is located in a ring formed by the two annularly arranged three

slots

90, 91 and 92. The metal pattern five may be a metal pattern in the shape of a regular hexagon, and belongs to the metal pattern group 10 of the fifth group, except that the number of members in the group may be one.

Referring to fig. 5 and 6, a metal pattern six and a metal pattern seven are respectively disposed on the front surface and the back surface of each first plug-in dielectric slab, and the metal pattern six and the metal pattern seven form a third metal pattern group; and a metal pattern eight and a metal pattern nine are respectively arranged on the front surface and the back surface of each second plug-in dielectric plate, and the metal pattern eight and the metal pattern nine form a fourth metal pattern group. Since there are six plug media boards one 20, 21, 22, 23, 24, 25 and three plug media boards two 30, 31, 32, there are six corresponding sets of third

metal pattern groups

210, 211, 212, 213, 214, 215 and three corresponding sets of fourth

metal pattern groups

310, 311, 312. It can be understood that the third metal pattern group and the fourth metal pattern group are correspondingly disposed on the first plug dielectric board and the second plug dielectric board, and therefore, the layout is the same as that of the corresponding plug dielectric board, and the description thereof is omitted.

One end of a metal transmission strip line of the second metal pattern group is provided with an antenna feed welding area of the second metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the second metal pattern group is provided with an antenna reflector, and the antenna reflector of the third metal pattern group is arranged on the fourth metal pattern group.

For example, in the three second

metal pattern groups

220, 221, 222, each metal pattern group may include two metal

transmission strip lines

50 and 51, two antenna

active elements

52 and 53, an antenna reflector 54, an antenna feed land 55, a metalized via 57, and a metal pad 56. Metal pads 56 are located on the front side of the circular dielectric plate 11 for the passage of corresponding metallized vias 57. The vertical projections of the metal

transmission strip lines

50 and 51 overlap, and the two antenna

active elements

52 and 53 are symmetrically arranged with the metal

transmission strip lines

50 and 51 as the symmetry axis. One end of the metal transmission strip line 50 is provided with an antenna feed pad 55, the other end is connected to the corresponding antenna active element 52, and an antenna director 54 is provided on the metal pattern four.

And one end of the metal transmission strip line of the metal pattern six is provided with an antenna feed welding area of a third metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the third metal pattern group is provided with an antenna reflector, and the antenna reflector of the third metal pattern group is arranged on the metal pattern seven.

For example, in the six sets of the third

metal pattern groups

210, 211, 212, 213, 214, 215, each set of metal pattern groups may include two metal

transmission strip lines

40 and 41, two antenna

active elements

42 and 43, an antenna reflector 44, an antenna feed land 45, a metalized via 47, and a metal pad 46. Metal pads 46 are located on the front side of the first plug dielectric board for corresponding metallized vias 47 to pass through. The vertical projections of the metal

transmission strip lines

40 and 41 overlap, and the two antenna

active elements

42 and 43 are symmetrically arranged with the metal

transmission strip lines

40 and 41 as the symmetry axis. One end of the metal transmission strip line 40 is provided with an antenna feed land 45, the other end is connected to the corresponding antenna active element 43, and an antenna reflector 44 is provided on the metal pattern seven.

One end of a metal transmission strip line of the first metal pattern is provided with an antenna feed welding area of a first metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the first metal pattern group is provided with an antenna director, and the antenna director of the first metal pattern group is arranged on the third metal pattern.

For example, in the six groups of first type

metal pattern groups

320, 321, 322, 323, 324, 325, each group of metal pattern groups may include two metal

transmission strip lines

70 and 71, two antenna

active elements

72 and 73, an antenna reflector 74, an antenna director 75, an antenna feed land 76, a metalized via 78, and a metal pad 77. Metal pads 77 are located on the front side of the circular dielectric plate 11 for the passage of corresponding metallized vias 78. The vertical projections of the metal

transmission strip lines

70 and 71 overlap, and the two antenna

active elements

72 and 73 are symmetrically arranged with the metal

transmission strip lines

70 and 71 as the symmetry axis. One end of the metal transmission strip line 70 is provided with an antenna feed land 76 and the other end is connected to the corresponding antenna active element 73, and an antenna director 75 is provided on the metal pattern three.

One end of the metal transmission strip line of the metal pattern group III is provided with an antenna feed welding area of a fourth metal pattern group, the other end of the metal transmission strip line of the metal pattern group III is connected with a corresponding antenna active oscillator, the fourth metal pattern group is provided with an antenna director, and the antenna director of the fourth metal pattern group is arranged on the metal pattern group III.

For example, in the three fourth

metal pattern groups

310, 311, 312, each metal pattern group may include two metal

transmission strip lines

60 and 61, two antenna

active elements

62 and 63, an antenna reflector 64, an antenna director 65, an antenna feed land 66, a metalized via 68, and a metal pad 67. The metal pad 67 is located on the front surface of the second plug dielectric board for the corresponding metallized via 68 to pass through. The vertical projections of the metal

transmission strip lines

60 and 61 overlap, and the two antenna

active elements

62 and 63 are symmetrically arranged with the metal

transmission strip lines

60 and 61 as the symmetry axis. One end of the metal transmission strip line 60 is provided with an antenna feed pad 66, the other end is connected to the corresponding antenna active element 63, and an antenna director 65 is provided on the metal pattern nine.

All of the above metal patterns can be provided on the corresponding dielectric sheet by printing.

As shown in fig. 9, due to the design of the present invention, the indoor AP intelligent MIMO antenna of the present invention can receive six radio frequency signals in six frequency bands:

the three second

metal pattern groups

220, 221 and 222 receive a first radio frequency signal;

the six groups of third

metal pattern groups

210, 211, 212, 213, 214 and 215 are arranged at intervals, wherein one group of three groups of third

metal pattern groups

210, 212 and 214 arranged at intervals receives one path of radio frequency signal II, and the other group of three groups of third

metal pattern groups

211, 213 and 215 arranged at intervals receives one path of radio frequency signal III;

the six groups of first

metal pattern groups

320, 321, 322, 323, 324 and 325 are arranged at intervals, wherein three groups of first

metal pattern groups

320, 322 and 324 arranged at intervals in one group receive a radio frequency signal four, and three groups of first

metal pattern groups

321, 323 and 325 arranged at intervals in the other group receive a radio frequency signal five;

the three fourth

metal pattern groups

310, 311, and 312 receive a rf signal six.

Each path of radio frequency signal can be controlled through a semiconductor switch, in this embodiment, the first frequency band includes 3 paths of radio frequency signals, and the first radio frequency signal is electrically connected with three groups of second

metal pattern groups

220, 221, and 222 printed on the circular dielectric plate 11 through the semiconductor switches; the radio frequency signal two-way semiconductor switch is respectively and electrically connected with three groups of third

metal pattern groups

210, 212 and 214 on three plugging dielectric slabs one 20, 22 and 24 which are vertically inserted into the circular dielectric slab 11; the radio frequency signal tee is electrically connected with three third

metal pattern groups

211, 213 and 215 on three plugging

dielectric slabs

21, 23 and 24 vertically inserted into the circular dielectric slab 11 through the semiconductor switch respectively.

The second frequency band comprises 3 paths of radio frequency signals, and the four radio frequency signals are respectively and electrically connected with three groups of first

metal pattern groups

320, 322 and 324 printed on the circular dielectric plate 11 through semiconductor switches; the radio frequency signal five is respectively and electrically connected with three groups of first

metal pattern groups

321, 323 and 325 printed on the circular dielectric plate 11 through a semiconductor switch; the radio frequency signal six is respectively and electrically connected with three groups of fourth

metal pattern groups

310, 311 and 312 on the plugging

dielectric plates

30, 31 and 32 vertically inserted into the circular dielectric plate 11 through the semiconductor switch; therefore, the indoor AP intelligent MIMO antenna is a dual-frequency 3X 3MIMO antenna covering three sectors, and the hardware design can enable the maximum radiation direction of the antenna to point to a terminal client through the current intelligent algorithm, and align the zero point of the antenna radiation directional diagram to the interference direction, thereby greatly improving the wireless throughput and achieving the purpose of good communication performance.

In this embodiment, the metal may be copper, and the metal surface may be treated by: and (4) coating green oil. The working frequency band of the indoor AP intelligent MIMO antenna can be 2.412-2.484 GHz and 5.15-5.85 GHz. The size of the circular medium plate 11 is preferably 80mm in radius and 0.8mm in thickness, and the sizes of six first plugging

medium plates

20, 21, 22, 23, 24 and 25 which are vertically inserted into the circular medium plate 11 are preferably 50 × 25 × 0.8mm ³ The dimensions of the two plugging

medium plates

30, 31 and 32 of the three vertically inserted round medium plates 11 are preferably 32 multiplied by 28 multiplied by 0.8mm ³ 。

Through the design, performance parameters such as impedance characteristics, antenna gain, standing-wave ratio, isolation, E-plane and H-plane 3dB lobe widths and the like of the outdoor wireless point-to-point directional AP antenna meet requirements, and therefore the indoor AP intelligent MIMO antenna with low cost, high communication efficiency, high communication capacity and high anti-interference performance is obtained. The working frequency band of the AP intelligent MIMO AP antenna is 2.412-2.484GHz 5.15-5.85 GHz; the gain of the 2.4G frequency band is more than 4.5dBi; the standing-wave ratio is less than 2; the port isolation is less than-20 dB; the characteristic impedance is 50 Ω; the gain of the 5.0G frequency band is more than 5.0dBi; the standing-wave ratio is less than 2; the port isolation is less than-22 dB; the characteristic impedance is 50 Ω; the connector mode is that IPX takes radio frequency shielding line, and shielding line length is optional. In this embodiment, the size is fixed, so that the cost is minimized, the installation is simple, the communication performance is good, and partial simulation results of the indoor AP smart MIMO antenna are shown in fig. 10a and 10 b. From fig. 10a, it can be seen that the standing-wave ratio of the AP smart MIMO AP antenna in the operating band 2.412 to 2.484GHz is about 2.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An indoor AP intelligent MIMO antenna comprises a circular dielectric slab and a plurality of metal patterns arranged on the circular dielectric slab; the method is characterized in that:

a metal pattern is arranged on the front surface of the circular dielectric slab and between two adjacent slots respectively; the metal patterns on two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis and are defined as a first metal pattern; a metal pattern between two adjacent slots I is defined as a metal pattern II;

a metal pattern is arranged on the back surface of the circular dielectric slab and between two adjacent slots respectively; the metal patterns on the two opposite sides of each second slot are symmetrically distributed by taking the corresponding second slot as a symmetry axis, and are defined as a third metal pattern; a metal pattern between every two adjacent slots I is defined as a metal pattern IV; in the area on the same vertical line vertical to the circular dielectric slab, a metal pattern I on the front side and a metal pattern II on the back side correspond to each other to form a group of first metal pattern groups, and a metal pattern II on the front side and a metal pattern IV on the back side correspond to each other to form a group of second metal pattern groups; the back surface of the circular dielectric slab is also provided with a closed metal pattern five which takes the circle center of the circular dielectric slab as the center, and the metal pattern five is positioned in a ring consisting of three annularly arranged slots II;

the indoor AP intelligent MIMO antenna also comprises six plug-in dielectric plates I respectively plugged in the six slots I and three plug-in dielectric plates II respectively plugged in the three slots II; the front surface and the back surface of each plug-in medium plate I are respectively provided with a metal pattern six and a metal pattern seven, and the metal pattern six and the metal pattern seven form a third metal pattern group; a metal pattern eight and a metal pattern nine are respectively arranged on the front surface and the back surface of each plug-in dielectric slab II, and the metal pattern eight and the metal pattern nine form a fourth metal pattern group;

2. An indoor AP smart MIMO antenna as claimed in claim 1, wherein: and in the same metal pattern group, metal sheets for the corresponding metalized through holes to pass through are arranged on the front surfaces of the corresponding dielectric plates.

3. An indoor AP smart MIMO antenna as claimed in claim 1, wherein: and the three groups of second metal pattern groups on the circular dielectric plate form 120-degree included angles between every two metal pattern groups.

4. An indoor AP smart MIMO antenna as claimed in claim 1, wherein: all the metal patterns are arranged on the corresponding medium plate by printing.

5. The indoor AP smart MIMO antenna of claim 1, wherein: the metal pattern five is a metal pattern in a regular hexagon shape.

6. The indoor AP smart MIMO antenna of claim 1, wherein: one end of a metal transmission strip line of the second metal pattern group is provided with an antenna feed welding area of the second metal pattern group, the other end of the metal transmission strip line of the second metal pattern group is connected with a corresponding antenna active oscillator, the second metal pattern group is provided with an antenna reflector, and the antenna reflector of the third metal pattern group is arranged on the fourth metal pattern group; and one end of the metal transmission strip line of the metal pattern six is provided with an antenna feed welding area of a third metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the third metal pattern group is provided with an antenna reflector, and the antenna reflector of the third metal pattern group is arranged on the metal pattern seven.

7. The indoor AP smart MIMO antenna of claim 1, wherein: one end of a metal transmission strip line of the first metal pattern is provided with an antenna feed welding area of a first metal pattern group, the other end of the metal transmission strip line is connected with a corresponding antenna active oscillator, the first metal pattern group is provided with an antenna director, and the antenna director of the first metal pattern group is arranged on a third metal pattern; one end of the metal transmission strip line of the metal pattern group III is provided with an antenna feed welding area of a fourth metal pattern group, the other end of the metal transmission strip line of the metal pattern group III is connected with a corresponding antenna active oscillator, the fourth metal pattern group is provided with an antenna director, and the antenna director of the fourth metal pattern group is arranged on the metal pattern group III.

8. An indoor AP smart MIMO antenna as claimed in claim 1, wherein: the six metal patterns are divided into two groups and distributed at intervals, and each two of the three metal patterns distributed at intervals form an included angle of 120 degrees.

9. The indoor AP smart MIMO antenna of claim 1, wherein: the six plug-in medium plates are divided into two groups and arranged at intervals, and each two of the three plug-in medium plates arranged at intervals form an included angle of 120 degrees.

10. The indoor AP smart MIMO antenna of claim 1, wherein: the indoor AP intelligent MIMO antenna receives six radio frequency signals of six frequency bands:

the three groups of second metal pattern groups receive a radio frequency signal I;

the six groups of third metal pattern groups are arranged at intervals in two types, wherein one group of three groups of third metal pattern groups arranged at intervals receive a radio-frequency signal II, and the other group of three groups of third metal pattern groups arranged at intervals receive a radio-frequency signal III;

and the three fourth metal pattern groups receive a radio frequency signal six.