CN214706258U - Antenna system and antenna box - Google Patents

Abstract

The utility model relates to an antenna technology field provides an antenna system and antenna box. The antenna system comprises a substrate, two WiFi antennas and 5G antennas, wherein the two WiFi antennas are arranged in the middle of the surface of the substrate at intervals; the number of the 5G antennas exceeds 4, and the 5G antennas are sequentially arranged on the substrate along the circumferential direction of the substrate. The utility model provides an antenna system and antenna box, the circumference that exceeds four 5G antennas along the base plate sets gradually in the base plate, and the middle part of base plate is equipped with two wiFi antennas to realize the overall arrangement of six at least antennas on the base plate, and ensure the isolation between the antenna, provide more than 4 5G communication ports under the space requirement strict condition, solve current antenna box and can not satisfy the technical problem of 5G module scheme throughput performance, improved antenna box's throughput performance.

Description

Antenna system and antenna box

Technical Field

The utility model belongs to the technical field of the antenna technology and specifically relates to an antenna system and antenna box are related to.

Background

An antenna is a transducer that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space) or vice versa. In order to enable the antenna to be used normally and permanently, an antenna system of the antenna needs to be installed in a box body of an antenna box, and a cable is led out from the inside to be connected with the outside.

With the wide application of the fifth generation mobile communication technology (5G technology), the fifth generation mobile communication products bring high speed and large flow, and increase the number of antennas of the mobile terminal. The first generation mobile communication product to the third generation mobile communication product only need to be configured with one antenna, the fourth generation mobile communication product needs to be configured with two antennas, and the fifth generation mobile communication product needs to be configured with at least four antennas, and in addition, the antenna box also needs to be configured with a WiFi antenna, a GPS antenna, a Bluetooth antenna and the like, so that the number of the antennas is greatly increased. And, numerous antennas are put at will, and the space occupation size is big, causes the antenna box volume too big.

In order to solve the above problems, an integrated antenna box in which a 5GNR antenna and an antenna system such as WiFi are highly integrated is appearing on the market. And because the relative position of each antenna in the integrated antenna box is solidified, the consistency of the spacing degree between the antennas is ensured, thereby ensuring the stability of the MIMO performance of the antenna box.

According to the related art that the utility model discloses the people learned, integrated antenna box built-in antenna collocation generally divides into two types, 6 antenna system that the first type comprises 4 root 5GNR antennas and 2 double-frenquency wiFi, 4 antenna system that only 4 root 5GNR constitutes are listed as the second type. However, the 5G module includes a 4-port, 6-port or 8-port rf branch output, so the antenna box in the related art cannot implement a 5G module scheme with more than 4 ports, and cannot exert the throughput performance of the 5G module scheme.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an antenna system and antenna box aims at solving the technical problem that current antenna box can not satisfy 5G module scheme performance of handling throughput.

In order to achieve the above object, the utility model adopts the following technical scheme: an antenna system, comprising:

a substrate;

the number of the WiFi antennas is two, and the two WiFi antennas are arranged in the middle of the surface of the substrate at intervals; and

5G antenna, the quantity of 5G antenna exceeds 4, 5G antenna follows the circumference of base plate sets gradually in the base plate.

In one embodiment, the substrate has a first plate edge, a second plate edge opposite to the first plate edge, a third plate edge between the first and second plate edges, and a fourth plate edge opposite to the third plate edge, the 5G antenna comprises two main antennas, two first sub-antennas and two second sub-antennas, one of the main antennas is disposed near the first board edge, and the other main antenna is disposed near the second board edge, the main antenna works in a first frequency band, a first one of the first auxiliary antennas is arranged close to the third plate edge, a second one of the first auxiliary antennas is arranged close to the fourth plate edge, the first secondary antenna works in a second frequency band, the two second secondary antennas are arranged close to the third plate edge and are respectively positioned at two sides of the first secondary antenna, and the second secondary antenna works in a third frequency band.

In one embodiment, two of the main antennas are symmetrically distributed about a perpendicular bisector of the third panel side.

In one embodiment, the two first secondary antennas are distributed in a central symmetry manner relative to the center of the substrate.

In one embodiment, the two second secondary antennas are symmetrically distributed with respect to the first secondary antenna.

In one embodiment, the 5G antenna further includes a third antenna and a fourth antenna, where the third antenna and the fourth antenna are disposed near the fourth board edge, the third antenna and the fourth antenna are respectively located on two sides of the second first antenna, the third antenna operates in the fourth frequency band, and the fourth antenna operates in the fifth frequency band.

In one embodiment, the third and fourth secondary antennas are symmetrically distributed about a second of the first secondary antennas.

In one embodiment, the length of the first plate edge is equal to the length of the second plate edge, the length of the third plate edge is equal to the length of the fourth plate edge, and the length of the first plate edge is less than the length of the third plate edge.

In one embodiment, the main antenna comprises a loop structure and a coupling feed structure arranged at a distance from the loop structure, wherein the coupling feed structure comprises a monopole branch and a loop branch, and the loop branch is connected to one end of the monopole branch.

In one embodiment, the WiFi antenna includes a T-shaped antenna disposed on one side surface of the substrate and a dual L-shaped slot antenna disposed on the other side surface of the substrate, and the T-shaped antenna and the dual L-shaped slot antenna are coupled.

In one embodiment, the T-shaped antenna and the 5G antenna are located on the same surface of the substrate.

The utility model also provides an antenna box, including above-mentioned arbitrary antenna system.

The utility model provides an antenna system and antenna box, the circumference that exceeds four 5G antennas along the base plate sets gradually in the base plate, and the middle part of base plate is equipped with two wiFi antennas to realize the overall arrangement of six at least antennas on the base plate, and ensure the isolation between the antenna, provide under the strict condition of space requirement and exceed 4 5G communication ports, solve current antenna box and can not satisfy the technical problem of 5G module scheme throughput performance, improved antenna box's throughput performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a perspective view of an antenna system provided by an embodiment of the present invention;

FIG. 2 is a schematic illustration of a side surface of the antenna system of FIG. 1;

fig. 3 is a schematic view of another side surface of the antenna system of fig. 1;

FIG. 4 is a schematic illustration of the installation of the main antenna of the antenna system of FIG. 1;

FIG. 5 is a diagram of simulation results for the main antenna of FIG. 4;

fig. 6 is a schematic view of the mounting of a first secondary antenna of the antenna system of fig. 1;

FIG. 7 is a diagram illustrating simulation results for the first secondary antenna of FIG. 6;

fig. 8 is a schematic view of the mounting of a second sub-antenna of the antenna system of fig. 1

FIG. 9 is a diagram illustrating simulation results for the second secondary antenna of FIG. 8;

FIG. 10 is a schematic view of the third sub-antenna of the antenna system of FIG. 1 mounted therein

FIG. 11 is a diagram illustrating simulation results for the third sub-antenna of FIG. 10;

fig. 12 is an installation schematic diagram of a fourth sub-antenna of the antenna system of fig. 1;

FIG. 13 is a diagram illustrating simulation results for the fourth sub-antenna of FIG. 12;

fig. 14 is a diagram illustrating simulation results of the WiFi antenna in fig. 1.

Wherein, in the figures, the respective reference numerals:

100-substrate, 101-first board edge, 102-second board edge, 103-third board edge, 104-fourth board edge, 105-second pad, 106-fourth pad, 107-sixth pad, 108-eighth pad, 109-tenth pad;

200-a main antenna, 210-a first loop structure, 211-a first bonding pad, 220-a first coupling feed structure, 221-a first monopole branch, 222-a first loop branch, 223-a first grounding via hole;

300-a first secondary antenna, 310-a third bonding pad;

400-a second secondary antenna, 410-a second loop structure, 411-a fifth pad, 420-a second coupling feed structure, 421-a second monopole branch, 422-a second loop branch, 423-a second ground via hole;

500-third secondary antenna, 510-third monopole stub, 511-seventh pad, 520-short circuit coupling stub, 521-third ground via hole;

600-fourth secondary antenna, 610-ninth pad;

700-WiFi antenna, 710-T type antenna, 720-double L type slot antenna.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 3, the present invention provides an antenna system, which includes a substrate 100, two WiFi antennas 700 and 5G antennas, the number of the WiFi antennas 700 is two, and the two WiFi antennas 700 are disposed at the middle portion of the surface of the substrate 100 at intervals. The number of 5G antennas exceeds 4. The 5G antennas are sequentially provided on the substrate 100 in the circumferential direction of the substrate 100.

In the antenna system, more than four 5G antennas are sequentially arranged on the substrate 100 along the circumferential direction of the substrate 100, and the middle part of the substrate 100 is provided with two WiFi antennas 700, so that the layout of at least six antennas is realized on the substrate 100, the isolation between the antennas is ensured, more than 4 5G communication ports are provided under the strict condition of space requirement, the technical problem that the existing antenna box cannot meet the throughput performance of a 5G module scheme is solved, and the throughput performance of the antenna box is improved.

Wherein the 5G antenna includes one or more of a main antenna 200, a first sub-antenna 300, a second sub-antenna 400, a third sub-antenna 500, and a fourth sub-antenna 600, which are submitted below. The 5G antenna can be selectively manufactured in a printed structure form and disposed on the substrate 100, can be selectively manufactured in a metal insert form and disposed on the substrate 100, can be selectively manufactured in a flexible circuit board form and disposed on the substrate 100 through a plastic bracket, and can also be selectively manufactured in a metal piece form and disposed on the substrate 100 through a plastic bracket.

In one embodiment, with continued reference to fig. 1-3, the substrate 100 has a first plate edge 101, a second plate edge 102 opposite the first plate edge 101, a third plate edge 103 between the first plate edge 101 and the second plate edge 102, and a fourth plate edge 104 opposite the third plate edge 103.

The 5G antenna includes two main antennas 200, two first sub-antennas 300, and two second sub-antennas 400. The main antennas 200 operate in a first frequency band, wherein one main antenna 200 is arranged near the first board edge 101, and the other main antenna 200 is arranged near the second board edge 102. The first sub-antenna 300 operates in the second frequency band, the first sub-antenna 300 is located near the third board edge 103, and the second first sub-antenna 300 is located near the fourth board edge 104. The second secondary antenna 400 operates in a third frequency band, and the two second secondary antennas 400 are disposed near the third board edge 103 and located on two sides of the first secondary antenna 300 respectively.

The 5G antennas are distributed along the edge of the substrate 100, the layout of the multiple antennas is realized on the substrate 100 with limited area, the isolation between the antennas is ensured, and the design requirement of high integration of the multiband antenna is met under the strict requirement of space. Moreover, the 5G antennas are distributed along the edge of the substrate 100, which is beneficial to the transmission and reception of electromagnetic waves. Two antennas of the same working frequency band are oppositely arranged on the substrate 100, and antennas of other working frequencies are also arranged between the two antennas of the same working frequency band, so that the isolation of the antennas of the same frequency band can be improved, and the transmission efficiency of the antenna system is improved.

Specifically, the substrate 100 is rectangular and is a printed circuit board. The substrate 100 includes a dielectric surface and a ground surface. The grounding via hole can connect the antenna on the dielectric surface with the ground to realize grounding.

In this embodiment, the length of the first plate edge 101 is the same as the length of the second plate edge 102, and the length of the third plate edge 103 is the same as the length of the fourth plate edge 104. The length of the first plate edge 101 is smaller than the length of the third plate edge 103.

Optionally, the length of the third board edge 103 is 133mm, the length of the first board edge 101 is 75mm, the thickness of the substrate 100 is 1mm, the whole antenna system is small in size, multiple integrated antennas are provided, and the antenna system can cover the full frequency band of the 5G module, and is strong in universality.

Specifically, the first frequency band is different from the second frequency band.

In this embodiment, referring to fig. 4 and 5, the first frequency band is 0.7GHz to 1.08GHz, 1.55GHz to 2.69GHz, and 3.3GHz to 6 GHz. That is, the main antenna 200 meets the frequency band requirement within Sub6 corresponding to FR1 under the requirement of 5GNR, and realizes the full-frequency-band coverage of 5G communication.

It should be noted that 5GNR (5G New Radio) is a global 5G standard based on a completely New air interface design of OFDM. The frequency range FR1 refers to the 5G Sub-6GHz (below 6 GHz) band.

S11 is one of S parameters, and represents the return loss characteristic. Referring to fig. 5, simulation calculation is performed on the main antenna 200, and the S11 parameter is lower than-6 dB in the frequency bands of 0.7 GHz-1.08 GHz, 1.55 GHz-2.69 GHz, and 3.3 GHz-6 GHz, so as to satisfy the transmission requirement of the corresponding frequency band.

In one embodiment, referring to fig. 2, the two main antennas 200 are symmetrically distributed about the perpendicular bisector of the third board edge 103, which not only makes the antenna system compact, but also simplifies the design of the antenna system, and is beneficial to the field symmetry of the antenna system.

In addition, two main antenna 200 symmetry settings, walk the line simple, the commonality is strong, has effectively reduced material cost.

In an embodiment of the present invention, referring to fig. 2 and 4, the main antenna 200 includes a first loop structure 210 and a first coupling feed structure 220 spaced apart from the first loop structure 210, the first coupling feed structure 220 includes a first monopole branch 221 and a first loop branch 222, and the first loop branch 222 is connected to one end of the first monopole branch 221. Therefore, the main antenna 200 adopts a loop structure and a coupling feed technology, so that multi-band coverage can be realized, and the universality of an antenna system is improved.

Specifically, referring to fig. 4, the first loop structure 210 is provided with a first pad 211 for welding an inner core of a first coaxial line (not shown), the substrate 100 is provided with a second pad 105 spaced apart from the first pad 211, the second pad 105 is used for welding an outer core of the first coaxial line, and the other end of the first monopole branch 221 is provided with a first ground via 223. The first pads 211 and the second pads 105 are matched and connected with the first coaxial line, so that welding automation is facilitated, and the assembling difficulty and the processing cost of the antenna system are further reduced.

In this embodiment, referring to fig. 6 and 7, the first secondary antenna 300 is a monopole antenna.

In this embodiment, the second frequency band is 3.6GHz to 5.5 GHz. That is, the first sub antenna 300 covers a high frequency band within the frequency range FR 1.

Referring to fig. 7, the utility model performs simulation calculation on the first secondary antenna 300, and the S11 parameter is lower than-6 dB in the frequency band of 3.6 GHz-5.5 GHz, thereby meeting the transmission requirement of the corresponding frequency band.

Specifically, referring to fig. 6, the first sub-antenna 300 is provided with a third bonding pad 310 for soldering the core of the second coaxial line, and the substrate 100 is provided with a fourth bonding pad 106 spaced apart from the second bonding pad 105.

In one embodiment, referring to fig. 2, the two first sub-antennas 300 are distributed in a central symmetry manner with respect to the center of the substrate 100, so that the antenna system has a compact structure and the radiation efficiency of the antenna system is improved.

Wherein the center of the substrate 100 refers to the geometric center of the substrate 100. Centrosymmetric means that one pattern is rotated 180 ° around a point, and if it can reach the other pattern position, then the two patterns are said to be centrosymmetric about this point.

Specifically, the two main antennas 200 are symmetrically distributed about the perpendicular bisector of the third board edge 103, the two first sub antennas 300 are located on the perpendicular bisector of the third board edge 103, and the two first sub antennas 300 are located farthest from the main antennas 200 in the limited area of the substrate 100, so that the isolation between the antennas is effectively ensured.

The second frequency band is different from the third frequency band. The first sub-antenna 300 can improve the isolation of the two second sub-antennas 400 at the same frequency.

In one embodiment, referring to fig. 2, the two second sub-antennas 400 are symmetrically distributed with respect to the first sub-antenna 300, so that the antenna system is compact, and the design of the antenna system is simplified, which is beneficial to the field symmetry of the antenna system.

Referring to fig. 8, the second secondary antenna 400 includes a second loop structure 410 and a second coupling feed structure 420 spaced apart from the second loop structure 410, the second coupling feed structure 420 includes a second monopole branch 421 and a second loop branch 422, and the second loop branch 422 is connected to one end of the second monopole branch 421.

Specifically, referring to fig. 8, the second loop structure 410 is provided with a fifth bonding pad 411 for welding an inner core of the third coaxial line, the substrate 100 is provided with a sixth bonding pad 107 arranged at an interval with the fifth bonding pad 411, the sixth bonding pad 107 is used for welding an outer core of the third coaxial line, and the end of the second monopole branch 421 is provided with a second grounding via 423.

In this embodiment, referring to fig. 9, the third frequency band is 1.66GHz to 2.85GHz and 3.3GHz to 5 GHz. And the simulation calculation is carried out on the second secondary antenna 400, and the S11 parameter is lower than-6 dB in the frequency bands of 1.66 GHz-2.85 GHz and 3.3 GHz-5 GHz, so that the transmission requirement of the corresponding frequency band is met.

In another embodiment of the present invention, referring to fig. 2, fig. 10 and fig. 12, the 5G antenna further includes a third antenna 500 and a fourth antenna 600, the third antenna 500 and the fourth antenna 600 are disposed near the fourth board edge 104, the third antenna 500 and the fourth antenna 600 are respectively disposed at two sides of the second first antenna 300, the third antenna 500 operates in the fourth frequency band, and the fourth antenna 600 operates in the fifth frequency band.

In one embodiment, the third sub-antenna 500 and the fourth sub-antenna 600 are symmetrically distributed with respect to the second first sub-antenna 300, which not only makes the antenna system compact, but also simplifies the design of the antenna system, and facilitates the field symmetry of the antenna system.

Specifically, the third sub-antenna 500 includes a third monopole branch 510 and a short-circuit coupling branch 520 spaced apart from the third monopole branch 510.

Further, referring to fig. 10, the third monopole branch 510 is provided with a seventh bonding pad 511 for welding an inner core of the fourth coaxial line, the substrate 100 is provided with an eighth bonding pad 108 spaced apart from the seventh bonding pad 511, the eighth bonding pad 108 is used for welding an outer core of the fourth coaxial line, and the end of the short-circuit coupling branch 520 is provided with a third grounding via 521.

Specifically, referring to fig. 11, the fourth frequency band covers 2.19GHz to 2.87GHz and 3.65GHz to 4.57 GHz.

The utility model discloses the people carries out the emulation calculation to third auxiliary antenna 500, in 2.19GHz ~ 2.87GHz and 3.65GHz ~ 4.57GHz frequency channel, the S11 parameter is less than-6 dB, satisfies the transmission requirement of corresponding frequency channel.

Specifically, the fourth sub-antenna 600 is a monopole antenna.

Further, referring to fig. 12, the fourth sub-antenna 600 is provided with a ninth land 610 for soldering an inner core of the fifth coaxial line, the substrate 100 is provided with a tenth land 109 spaced apart from the ninth land 610, and the tenth land 109 is used for soldering an outer core of the fifth coaxial line.

Specifically, referring to fig. 13, the fifth frequency band is 3.08GHz to 4.72 GHz.

The utility model discloses the people carries out the emulation calculation to fourth auxiliary antenna 600, and in 3.08GHz ~ 4.72GHz frequency channel, the S11 parameter is less than-6 dB, satisfies the transmission requirement of corresponding frequency channel.

Referring to fig. 2 and 3, the WiFi antenna 700 includes a T-shaped antenna 710 disposed on one side surface of the substrate 100 and a dual L-shaped slot antenna 720 disposed on the other side surface of the substrate 100, and the T-shaped antenna 710 and the dual L-shaped slot antenna 720 are coupled to fully utilize the space on both sides of the substrate 100, which is beneficial for antenna integration.

The dual L-shaped slot antenna 720 includes two slot antennas disposed at an interval, and the slot antennas are L-shaped.

Specifically, referring to fig. 14, the utility model discloses a people carries out the simulation calculation to wiFi antenna 700, and in 2.23GHz ~ 2.60GHz and 5.18GHz ~ 6.01GHz frequency channel, the S11 parameter is less than-6 dB, satisfies the transmission requirement of corresponding frequency channel. That is, the operating frequency of the WiFi antenna 700 is 2.23GHz to 2.60GHz and 5.18GHz to 6.01GHz, thereby meeting the use requirements of WiFi2.4G and 5.8G.

In one embodiment, referring to fig. 1, two WiFi antennas 700 are symmetrically distributed about the perpendicular bisector of the third board edge 103.

In one embodiment, referring to fig. 2, the T-shaped antenna 710 and the 5G antenna are located on the same surface of the substrate 100, which facilitates the soldering of the coaxial line.

It is understood that in other embodiments, the 5G antenna may be located on the surface of the substrate 100, or may be located on the side of the substrate 100.

In summary, the main challenge of 5G antenna design in Sub-6GHz band comes from the increase of the number of antennas brought by massive MIMO technology. In a multi-antenna deployment, each antenna needs to be separated by a certain distance to realize the decoupling of the multi-antenna. However, the industrial design requirement of the smallest volume as possible causes the design space of the antenna to be extremely compressed, so how to "plug" more antennas in the limited space becomes one of the bottleneck problems of the antenna system design, and the antenna system also needs to cover 5G multiband coverage, further increasing the design difficulty of the 5G antenna.

The utility model provides an antenna system, form compact structure, space utilization are high, have realized 8 root 5G antennas and 2 double-frenquency wiFi antenna 700's whole miniaturized overall arrangement, because all antennas all adopt PCB printing structure for the antenna profile reduces by a wide margin, has also reduced the production and the assembly cost of antenna simultaneously, has guaranteed the performance uniformity of antenna mass production.

Referring to fig. 5, 7, 9, 11, 13 and 14, it can be seen that all S11 parameters meet the performance standard by plotting the return loss against-6 dB. The antenna matching is good, and the coupling degree between any two same frequency bands is low.

The utility model also provides an antenna box, including the antenna system of above-mentioned arbitrary one. The antenna system is applied to the antenna box, so that the antenna box is small in size and can meet requirements of multi-band communication.

The antenna box comprises a box body, the antenna system is placed in the box body, and the box body is provided with a plurality of wire holes for the external coaxial wire to pass through the wire holes and be connected with a plurality of antennas in the box body.

The antenna box has the advantages of the antenna system in any of the above embodiments, which is not to be taken as an exception here.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. An antenna system, comprising:

a substrate;

the number of the WiFi antennas is two, and the two WiFi antennas are arranged in the middle of the surface of the substrate at intervals; and

5G antenna, the quantity of 5G antenna exceeds 4, 5G antenna follows the circumference of base plate sets gradually in the base plate.

2. The antenna system of claim 1, wherein: the substrate is provided with a first plate edge, a second plate edge opposite to the first plate edge, a third plate edge positioned between the first plate edge and the second plate edge, and a fourth plate edge opposite to the third plate edge, the 5G antenna comprises two main antennas, two first sub-antennas and two second sub-antennas, one of the main antennas is disposed near the first board edge, and the other main antenna is disposed near the second board edge, the main antenna works in a first frequency band, a first one of the first auxiliary antennas is arranged close to the third plate edge, a second one of the first auxiliary antennas is arranged close to the fourth plate edge, the first secondary antenna works in a second frequency band, the two second secondary antennas are arranged close to the third plate edge and are respectively positioned at two sides of the first secondary antenna, and the second secondary antenna works in a third frequency band.

3. The antenna system of claim 2, wherein: the antenna system further satisfies at least one of the following:

the two main antennas are symmetrically distributed about a perpendicular bisector of the third plate side;

the two first auxiliary antennas are distributed in central symmetry relative to the center of the substrate;

the two second secondary antennas are symmetrically distributed with respect to the first secondary antenna.

4. The antenna system of claim 2, wherein: the 5G antenna further comprises a third auxiliary antenna and a fourth auxiliary antenna, the third auxiliary antenna and the fourth auxiliary antenna are close to the fourth plate edge, the third auxiliary antenna and the fourth auxiliary antenna are respectively located on the second side of the first auxiliary antenna, the third auxiliary antenna works in a fourth frequency band, and the fourth auxiliary antenna works in a fifth frequency band.

5. The antenna system of claim 4, wherein: the third and fourth secondary antennas are symmetrically distributed about a second of the first secondary antennas.

6. The antenna system of claim 2, wherein: the length of the first plate edge is equal to that of the second plate edge, the length of the third plate edge is equal to that of the fourth plate edge, and the length of the first plate edge is smaller than that of the third plate edge.

7. The antenna system of claim 2, wherein: the main antenna comprises a loop structure and a coupling feed structure arranged at an interval with the loop structure, the coupling feed structure comprises a monopole branch and a loop branch, and the loop branch is connected to one end of the monopole branch.

8. The antenna system according to any of claims 1 to 7, characterized in that: the WiFi antenna comprises a T-shaped antenna arranged on the surface of one side of the substrate and a double-L-shaped slot antenna arranged on the surface of the other side of the substrate, and the T-shaped antenna is coupled with the double-L-shaped slot antenna.

9. The antenna system of claim 8, wherein: the T-shaped antenna and the 5G antenna are located on the same surface of the substrate.

10. An antenna box, characterized in that: comprising an antenna system according to any of claims 1 to 9.

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