TWI679807B - Antenna structure and wireless communication device with same - Google Patents

Abstract

An antenna structure includes a first array antenna. The first array antenna includes a plurality of first antenna units. The plurality of first antenna units are arranged in a first direction and a second direction. The antenna unit is a monopole antenna and includes a radiator. The radiator includes a straight bar portion and a circular arc portion. The straight bar portion is electrically connected to a signal source, and the circular arc portion is electrically connected to the straight bar. The arcuate portion is semicircular at one end away from the straight portion, and the radiator is configured to generate radiation in the first direction or the second direction.

Description

Antenna structure and wireless communication device having the same

The invention relates to an antenna structure and a wireless communication device having the antenna structure.

At present, millimeter wave (mmWave) antennas are gradually applied to wireless communication devices such as mobile phones and Customer Premise Equipment (CPE). However, when a millimeter wave antenna is disposed in the communication device, its radiation is easily interfered by a metal frame provided on the outside of the wireless communication device, so that its radiation field is shielded.

In view of this, it is necessary to provide an antenna structure and a wireless communication device having the antenna structure.

An antenna structure includes a first array antenna. The first array antenna includes a plurality of first antenna units. The plurality of first antenna units are arranged in a first direction and a second direction. The antenna unit is a monopole antenna and includes a radiator. The radiator includes a straight bar portion and a circular arc portion. The straight bar portion is electrically connected to a signal source, and the circular arc portion is electrically connected to the straight bar. The arcuate portion is semicircular at one end away from the straight portion, and the radiator is configured to generate radiation in the first direction or the second direction.

A wireless communication device includes the antenna structure described above.

The antenna structure of the present invention and the wireless communication device having the antenna structure provide the first array antenna, so that the antenna structure has better radiation coverage and antenna gain, and can effectively prevent its radiated radio waves from being transmitted by the wireless communication device. Metal frame.

100‧‧‧ Antenna Structure

10, 30‧‧‧ first array antenna

11, 11a, 11b ‧‧‧ the first antenna unit

110‧‧‧ substrate

112‧‧‧First floor

113‧‧‧ middle layer

114‧‧‧Second floor

112a‧‧‧first ground plane

114a‧‧‧Second ground plane

111, 111a, 111b ‧‧‧ radiator

116‧‧‧Straight Section

117, 117a, 117b‧‧‧arc

118‧‧‧first via

119‧‧‧via

50‧‧‧Second Array Antenna

51‧‧‧Second antenna unit

511‧‧‧ ground plane

512‧‧‧first substrate

513‧‧‧adhesive layer

514‧‧‧First Radiation Department

515‧‧‧second substrate

516‧‧‧Second Radiation Department

517‧‧‧Feeding Department

518‧‧‧Second Via

519‧‧‧Frame body

200, 200a‧‧‧ wireless communication device

21‧‧‧Motherboard

211‧‧‧first end

212‧‧‧second end

213‧‧‧First side

214‧‧‧second side

FIG. 1 is a schematic diagram of applying an antenna structure to a wireless communication device according to a preferred embodiment of the present invention.

2A to 2C are schematic cross-sectional views of a first antenna unit in the first array antenna shown in FIG. 1.

FIG. 3 is a partially exploded view of a second antenna unit in the second array antenna shown in FIG. 1.

FIG. 4 is a schematic cross-sectional view of a second antenna unit in the second array antenna shown in FIG. 3.

FIG. 5 is a simulation diagram of an input impedance of a first antenna unit in the first array antenna shown in FIG. 1.

FIG. 6 is a simulation diagram of the return loss of the first antenna unit shown in FIG. 2A.

FIG. 7 is a radiation field pattern diagram of the first antenna unit on the H plane shown in FIG. 2A.

FIG. 8 is a radiation pattern diagram of the first antenna unit on the E2 plane shown in FIG. 2A.

FIG. 9 is a graph of the radiation efficiency of the first antenna unit shown in FIG. 2A.

FIG. 10 is a simulation diagram of the return loss of the first antenna unit shown in FIG. 2B.

FIG. 11 is a radiation field pattern diagram of the first antenna unit on the H plane shown in FIG. 2B.

FIG. 12 is a radiation pattern diagram of the first antenna unit on the E2 plane shown in FIG. 2B.

FIG. 13 is a graph of the radiation efficiency of the first antenna unit shown in FIG. 2B.

FIG. 14 is a simulation diagram of the return loss of the first antenna unit shown in FIG. 2C.

FIG. 15 is a radiation field pattern diagram of the first antenna unit on the H plane shown in FIG. 2C.

FIG. 16 is a radiation pattern diagram of the first antenna unit on the E2 plane shown in FIG. 2C.

FIG. 17 is a graph of radiation efficiency of the first antenna unit shown in FIG. 2C.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those with ordinary knowledge in the art without any creative labor belong to the protection scope of the present invention.

It should be noted that when an element is called "electrically connected" to another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "electrically connected" to another element, it can be a contact connection, for example, a wire connection method, or a non-contact connection method, for example, a non-contact coupling method.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

Referring to FIG. 1, a preferred embodiment of the present invention provides an antenna structure 100, which can be applied to a wireless communication device 200 such as a mobile phone, Customer Premise Equipment (CPE), and the like, for transmitting and receiving radio waves for transmission. Exchange wireless signals.

The wireless communication device 200 further includes a motherboard 21 and a metal frame (not shown). The host board 21 may be a printed circuit board (Printed Circuit Board, PCB). The main board 21 may be made of a dielectric material such as epoxy glass fiber (FR4). The motherboard 21 is set It is disposed in a space surrounded by the metal frame and spaced from the metal frame.

The motherboard 21 includes a first end portion 211, a second end portion 212, a first side portion 213, and a second side portion 214. The first end portion 211 is opposite to the second end portion 212 and is disposed in parallel with each other. The first side portion 213 is opposite to the second side portion 214 and is disposed in parallel to each other, and is connected to both ends of the first end portion 211 and the second end portion 212, respectively. The first end portion 211 and the second end portion 212 may correspond to the top and bottom of the wireless communication device 200, respectively. The length of the first side portion 213 and the second side portion 214 is longer than the length of the first end portion 211 and the second end portion 212.

The first side portion 213 and the second side portion 214 are both parallel to the first direction (for example, the X-axis direction), and the first end portion 211 and the second end portion 212 are parallel to the second direction (for example, the Y-axis direction). The first direction and the second direction are perpendicular to each other. The main board 21 is parallel to the XY plane and perpendicular to the Z axis.

The antenna structure 100 includes at least a first array antenna and a second array antenna 50. In this embodiment, the antenna structure 100 includes two first array antennas, such as the first array antenna 10 and the first array antenna 30. The first array antenna 10 is disposed at a corner of the motherboard 21, such as a corner of the first end portion 211 and the first side portion 213, for generating a first direction (such as the X-axis direction) and a second direction. (E.g. Y-axis direction). The first array antenna 30 is disposed at another corner of the motherboard 21, such as a corner of the second end portion 212 and the second side portion 214, for generating the first direction (such as the X-axis direction) and the The radiation in the second direction (for example, the Y-axis direction).

Specifically, in this embodiment, the first array antennas 10 and 30 are disposed at diagonal positions of the motherboard 21. In this way, it can be ensured that when the user holds the wireless communication device 200 At least one first array antenna, such as the first array antenna 10 or the first array antenna 30, will not be shielded, that is, its radiation in the first direction and the second direction is not affected by the user's grip.

In this embodiment, the first array antenna 10 includes N1 + M1 first antenna units 11. Wherein, N1 and M1 are both positive integers greater than or equal to 1. The N1 first antenna units 11 are disposed on the first side portion 213 and are arranged at intervals along the first direction (for example, the X-axis direction). The M1 first antenna units 11 are disposed on the first end portion 211 and are arranged at intervals along the second direction (for example, the Y-axis direction). In this embodiment, N1 is 2 and M1 is 4. That is, the first array antenna 10 includes 2 + 4 first antenna units 11. Of course, in other implementations, the number of the first antenna units 11 of the first array antenna 10 along the first direction and the second direction may be adjusted according to specific requirements.

In this embodiment, each of the first antenna units 11 is a monopole antenna and is a millimeter wave (mmWave) antenna. Each first antenna unit 11 may have a structure shown in FIG. 2A, FIG. 2B, or FIG. 2C.

Please refer to FIG. 2A together. In one embodiment, the first antenna unit 11 includes a substrate 110 and a radiator 111.

The substrate 110 is a multilayer circuit board. In this embodiment, the substrate 110 is a three-layer circuit board. For example, the substrate 110 includes a first layer 112, an intermediate layer 113, and a second layer 114. The first layer 112, the intermediate layer 113, and the second layer 114 are sequentially stacked, that is, the intermediate layer 113 is disposed between the first layer 112 and the second layer 114. A first ground plane 112 a is disposed on the first layer 112. A second ground plane 114 a is disposed on the second layer 114.

The radiator 111 includes a straight portion 116 and a circular arc portion 117.所述 Straight section 116 is substantially straight, and is disposed on the intermediate layer 113. One end of the straight strip portion 116 is connected to a signal source (not shown) for feeding a current signal to the radiator 111. The arc-shaped portion 117 is substantially water-drop-shaped, and is disposed on the intermediate layer 113. One end of the arc portion 117 is connected to the straight portion 116, and the other end continues to extend along the extending direction of the straight portion 116 and is disposed toward the outside of the wireless communication device 200. The width of the circular arc portion 117 connected to one end of the straight portion 116 is the same as the width of the straight portion 116 and then gradually widens. A width of one end of the arc portion 117 away from the straight portion 116 is greater than a width of the straight portion 116. One end of the arc portion 117 away from the straight portion 116 is semi-circular. The arc portion 117 is closer to the outside of the wireless communication device 200 than the straight portion 116.

The substrate 110 is further provided with a plurality of first vias 118. The plurality of first vias 118 are used to communicate the first ground plane 112a and the second ground plane 114a. It can be understood that, in this embodiment, a part of the first vias 118 is also provided around the straight portion 116 for electromagnetic shielding, so that the radiation of the radiator 111 is mainly concentrated on the arc portion. 117 on both sides. For example, if the straight portion 116 is disposed along the X-axis direction, the radiation direction of the radiator 111 is the Y-axis direction. Conversely, if the straight portion 116 is disposed along the Y-axis direction, the radiation direction of the radiator 111 is the X-axis direction. That is, the radiation direction of the radiator 111 is perpendicular to the straight portion 116.

The straight portions 116 of the N1 first antenna units 11 of the first array antenna 10 are all disposed along the second direction (for example, the Y-axis direction). The radiation directions are all in the first direction (for example, the X-axis direction). The straight portions 116 of the M1 first antenna units 11 of the first array antenna 10 are all disposed along a first direction (for example, the X-axis direction). Therefore, the M1 first antenna units 11 The radiation direction is the second direction (E.g. Y-axis direction).

Understandably, please refer to FIG. 2B together, which is a schematic structural diagram of the first antenna unit 11a in another embodiment. The structure of the first antenna unit 11 a is similar to that of the first antenna unit 11, that is, it also includes a substrate 110, a radiator 111 a, and a plurality of first vias 118. The substrate 110 is a three-layer circuit board, which includes a first layer 112, an intermediate layer 113, and a second layer 114. The first layer 112, the intermediate layer 113, and the second layer 114 are sequentially stacked. A first ground plane 112 a is disposed on the first layer 112. A second ground plane 114 a is disposed on the second layer 114. The radiator 111a includes a straight portion 116 and a circular arc portion 117a. The straight portion 116 is substantially straight and is disposed on the intermediate layer 113. One end of the straight portion 116 is connected to a signal source (not shown) for feeding a current signal to the radiator 111a.

In this embodiment, the difference between the first antenna unit 11a and the first antenna unit 11 is that the arc portion 117a is not disposed on the intermediate layer 113, but is disposed on the first layer. 112 and electrically connected to the straight portion 116 through a via 119.

Understandably, please refer to FIG. 2C together, which is a schematic structural diagram of the first antenna unit 11b in another embodiment. The structure of the first antenna unit 11b is similar to that of the first antenna unit 11a, that is, it includes a substrate 110, a radiator 111b, and a plurality of first vias 118. The substrate 110 is a three-layer circuit board, which includes a first layer 112, an intermediate layer 113, and a second layer 114. The first layer 112, the intermediate layer 113, and the second layer 114 are sequentially stacked. A first ground plane 112 a is disposed on the first layer 112. A second ground plane 114 a is disposed on the second layer 114. The radiator 111b includes a straight portion 116 and a circular arc portion 117b. The straight portion 116 is substantially straight and is disposed on the intermediate layer 113. One end of the straight strip portion 116 is connected to a signal source (not shown) for feeding a current signal to the radiator 111b. The arc portion 117b is provided at The first layer 112 is electrically connected to the straight portion 116 through a via 119.

It can be understood that, in this embodiment, the difference between the first antenna unit 11b and the first antenna unit 11a is that the arc portion 117b does not extend along the extending direction of the straight portion 116, but is deflected. 90 degrees, that is, its extending direction is perpendicular to the extending direction of the straight portion 116. The arc portion 117 b of FIG. 2C extends in a direction perpendicular to the left side of the straight portion 116. In other embodiments, the arc portion 117b may extend perpendicular to the right side of the straight portion 116, or may be erected directly in an area of the first layer 112 where the first ground plane 112a is not provided. .

Understandably, please refer to FIG. 1 again. In this embodiment, the shape and structure of the first array antenna 30 is similar to that of the first array antenna 10, that is, it includes M1 + N1 first antennas. Unit 11 / 11a / 11b. The M1 first antenna units 11 / 11a / 11b of the first array antenna 30 are disposed on the second side portion 214, and are arranged at intervals along the first direction (for example, the X-axis direction). The N1 first antenna units 11 / 11a / 11b of the first array antenna 30 are disposed on the second end portion 212, and are arranged at intervals along the second direction (for example, the Y-axis direction).

The straight portions 116 of the M1 first antenna units 11 / 11a / 11b of the first array antenna 30 are all disposed along the second direction (for example, the Y-axis direction). Therefore, the first array antenna 30 The radiation directions of the M1 first antenna units 11 / 11a / 11b are all in the first direction (for example, the X-axis direction). The straight portions 116 of the N1 first antenna units 11 / 11a / 11b of the first array antenna 30 are all disposed along a first direction (for example, the X-axis direction). Therefore, the first array antenna 30 The radiation directions of the N1 first antenna units 11 / 11a / 11b are all in the second direction (for example, the Y-axis direction).

In this embodiment, the first array antenna 10 is arranged along the first direction. The number of the first antenna units 11 / 11a / 11b is equal to the number of the first antenna units 11 / 11a / 11b arranged in the second direction by the first array antenna 30. The number of the first antenna units 11 / 11a / 11b arranged in the second direction of the first array antenna 10 is equal to the number of the first antenna units 11 / 11a / arranged in the first direction of the first array antenna 30 11b quantity.

Understandably, please refer to FIGS. 2A to 2C again, because the radiators 111 / 111a / 111b are disposed on the intermediate layer 112 or the first layer 111 and are spaced apart from the edge of the substrate 111 by a certain distance. Therefore, even if the substrate 111 is in contact with the metal frame of the wireless communication device 200, the radiator 111 / 111a / 111b will be separated from the metal frame, so that the metal frame will not interfere or be shielded. Radiation of the radiator 111 / 111a / 111b.

Understandably, referring to FIG. 1 again, the second array antenna 50 is disposed on the motherboard 21. The second array antenna 50 is disposed at a distance from the first array antennas 10 and 30 and is disposed adjacent to the first array antenna 10. The second array antenna 50 is configured to generate radiation in a third direction (for example, a positive Z-axis direction). In this embodiment, the positive Z-axis direction refers to a direction from a display screen (not shown) of the wireless communication device 200 to a back cover (not shown) of the wireless communication device 200.

The second array antenna 50 includes N2 * M2 second antenna units 51. Among them, N2 and M2 are both positive integers greater than or equal to 1. The second antenna units 51 in the N2 rows are arranged at intervals along the first direction (for example, the X-axis direction). The second antenna units 51 of the M2 column are arranged at intervals along the second direction (for example, the Y-axis direction). In this embodiment, the N2 is 2 and the M2 is 4, that is, the second array antenna 50 includes 2 * 4 second antenna units 51. Of course, in other implementations, the number of the second antenna units 51 of the second array antenna 50 along the first direction and the second direction may be adjusted according to specific needs.

Please refer to FIG. 3 and FIG. 4 together, each second antenna unit 51 is a millimeter wave (mmWave) antenna. Each second antenna unit 51 includes a ground layer 511, a first substrate 512, an adhesive layer 513, a first radiating portion 514, a second substrate 515, and a second radiating portion 516.

The first substrate 512 is disposed on the ground layer 511. The ground layer 511 is made of a metal material. An area of the first radiation portion 514 is smaller than an area of the adhesive layer 513. The adhesive layer 513 is a layer of adhesive for bonding the first substrate 512 and the second substrate 515, and the first radiation portion 514 is sandwiched between the first substrate 512 and the first substrate 512. Between the second substrates 515. The first radiation portion 514 is made of a metal material. The first radiating portion 514 is disposed between the first substrate 512 and the adhesive layer 513, and is electrically connected to a feeding source (not shown) through a feeding portion 517 (see FIG. 4).

The second substrate 515 is disposed on a surface of the adhesive layer 513 away from the first substrate 512. The first substrate 512 and the second substrate 515 may be made of a non-conductive material, for example, a dielectric material such as epoxy glass fiber (FR4). The second radiating portion 516 is made of a metal material. The second radiation portion 516 is disposed on a surface of the second substrate 515 away from the adhesive layer 513.

It can be understood that the second antenna unit 51 further includes a frame body 519. The frame body portion 519 is substantially rectangular frame-shaped, and is made of a metal material. The frame portion 519 is disposed on a surface of the second substrate 515 away from the adhesive layer 513 and is disposed around the second radiation portion 516.

It can be understood that the second antenna unit 51 is further provided with a plurality of second vias 518. The plurality of second vias 518 pass through the second substrate 515, the adhesive layer 513, and the first substrate 512 in order to communicate with the frame portion 519 and the ground layer 511.

It can be understood that, in this embodiment, neither the first radiating portion 514 nor the second radiating portion 516 is grounded. When the feed source feeds a current, the current will flow through the first radiating portion 514 and then be coupled to the second radiating portion 516 such that the first radiating portion 514 and the second radiating portion 516 Respective resonance frequencies are generated. The two different resonant frequencies generated by the first radiating portion 514 and the second radiating portion 516 can effectively expand the bandwidth of the second array antenna 50.

It can be understood that, in this embodiment, the ground layer 511, the second via hole 518, and the frame body portion 519 are all made of a metal material. The ground layer 511, the second via hole 518, and the frame body portion 519 constitute a ground of the second antenna unit 51, and the ground layer 511, the second via hole 518, and the frame The body 519 has an electromagnetic shielding function, so that the radiation of the second antenna unit 51 is concentrated to the third direction, that is, the positive Z-axis direction.

It can be understood that, in this embodiment, the second radiating portion 516 is not connected to the feeding source through a corresponding feeding portion. Of course, in other embodiments, the second radiating portion 516 may also be connected to the feeding source through a corresponding feeding portion. In this way, both the first radiating portion 514 and the second radiating portion 516 can directly feed current from the feeding source.

Please refer to FIG. 5 together, which is a simulation diagram of the input impedance of the first antenna unit 11 / 11a of the first array antenna in the antenna structure 100 of the present invention. Among them, the curve S51 is the resistance value (R) of the conventional monopole antenna. The curve S52 is the reactance value (X) of the conventional monopole antenna. The curve S53 is the resistance value (R) of the first antenna element 11 in the first array antenna. The curve S54 is the reactance value (X) of the first antenna element 11 in the first array antenna. The curve S55 is the resistance value (R) of the first antenna element 11a in the first array antenna. The curve S56 is the reactance value (X) of the first antenna element 11a in the first array antenna.

Obviously, it can be seen from the curves S51-S56 that the conventional monopole antenna has a high input impedance (about 158 ohms) when the quarter-wavelength of the millimeter wave (mmWave) resonates, and its broadband impedance matching is not easy. The first antenna unit in this case, such as the first antenna unit 11 / 11a, uses a monopole antenna with a semi-circular end, which can not only be thin and short, but also exhibit lower input impedance and achieve wider frequency. Impedance matching.

FIG. 6 is an analog diagram of the return loss of the first antenna unit 11 in the first array antenna of the present invention. When the frequency point m1 is 26 GHz, the return loss of the first antenna unit 11 is -15.8526 dB. When the frequency point m2 is 29 GHz, the return loss of the first antenna unit 11 is -11.3211 dB.

FIG. 7 is a radiation pattern diagram of the first antenna unit 11 on the H plane (ie, the XY plane) in the first array antenna of the present invention. FIG. 8 is a radiation pattern diagram of the first antenna unit 11 on the E2 plane (that is, the XZ plane) in the first array antenna of the present invention. FIG. 9 is a graph of the radiation efficiency of the first antenna unit 11 in the first array antenna of the present invention.

FIG. 10 is a simulation diagram of the return loss of the first antenna unit 11a in the first array antenna of the present invention. FIG. 11 is a radiation pattern diagram of the first antenna unit 11a on the H plane (ie, the XY plane) in the first array antenna of the present invention. FIG. 12 is a radiation pattern diagram of the first antenna unit 11a on the E2 plane (that is, the XZ plane) in the first array antenna of the present invention. FIG. 13 is a graph of the radiation efficiency of the first antenna unit 11a in the first array antenna of the present invention.

FIG. 14 is a simulation diagram of the return loss of the first antenna unit 11b in the first array antenna of the present invention. FIG. 15 is a radiation pattern diagram of the first antenna unit 11b on the H plane (ie, the XY plane) in the first array antenna of the present invention. FIG. 16 is a radiation pattern diagram of the first antenna unit 11b on the E2 plane (that is, the XZ plane) in the first array antenna of the present invention. FIG. 17 is the first day of the first array antenna of the present invention Graph of radiation efficiency of the line unit 11b.

It can be seen from FIG. 6 to FIG. 17 that the radiation pattern of the first antenna unit 11 / 11a / 11b in the first array antenna can effectively make up for the deficiency of the second array antenna 50. That is to say, the radiation of the second array antenna 50 is mainly concentrated in the positive Z-axis direction, and there is no radiation in the X and Y axis directions. The radiation of the first antenna unit 11 / 11a / 11b is mainly concentrated in the X and Y axis directions, so that the radiation of the antenna structure 100 can be covered to the X, Y, and Z axis directions, which means that it has better radiation coverage. Range and antenna gain. Furthermore, since the first antenna unit 11 / 11a / 11b is disposed on the side of the motherboard 21, its planar antenna configuration can effectively prevent its radiated radio waves from being shielded by the metal frame on the side.

Obviously, the antenna structure 100 and the wireless communication device 200 having the antenna structure 100 of the present invention are provided with the first array antenna 10, 30 and the second array antenna 50, so that the antenna structure 100 has better radiation coverage. And antenna gain, and can effectively prevent the radiated radio waves from being blocked by the metal frame of the wireless communication device 200.

The above descriptions are merely preferred embodiments of the present invention, and are not intended to limit the present invention in any form. In addition, those skilled in the art can make other changes within the spirit of the present invention. Of course, these changes made in accordance with the spirit of the present invention should be included in the scope of protection of the present invention.

Claims (11)

An antenna structure is improved in that the antenna structure includes a first array antenna, the first array antenna includes a plurality of first antenna units, and the plurality of first antenna units are along a first direction and a second direction In the layout, each of the first antenna units is a monopole antenna and includes a substrate and a radiator. The substrate includes a first layer, an intermediate layer, and a second layer which are sequentially stacked, and the radiator includes a straight portion. And an arc portion, the straight portion is disposed in the intermediate layer and is electrically connected to a signal source, the arc portion is electrically connected to the straight portion, and the arc portion is far from the straight portion. One end is semicircular, and the radiator is used for generating radiation in the first direction or the second direction. The antenna structure according to item 1 of the scope of patent application, wherein the first layer is provided with a first ground plane, the second layer is provided with a second ground plane, and the substrate is further provided with a plurality of first ground planes. A via hole, and a plurality of the first via holes are used to communicate the first ground plane and the second ground plane. The antenna structure according to item 2 of the scope of patent application, wherein the arc portion is disposed on the intermediate layer, one end of the arc portion is connected to the straight portion, and the other end continues along the straight portion. The extending direction extends; or the arc portion is disposed on the first layer, and one end of the arc portion is electrically connected to the straight portion through a via hole. The antenna structure according to item 2 of the scope of patent application, in which a part of the first via is also provided around the straight portion for electromagnetic shielding, so that the radiation of the radiator is concentrated on the arc portion On both sides. The antenna structure according to item 1 of the patent application scope, wherein the antenna structure includes two of the first array antennas, and the two first array antennas are arranged diagonally. The antenna structure according to item 5 of the scope of patent application, wherein the number of the first antenna elements arranged in the first direction between the two first array antennas is equal to the number of the two first array antennas along the second The number of the first antenna units arranged in the direction. The antenna structure according to item 1 of the scope of patent application, wherein the antenna structure further includes a second array antenna, the second array antenna is spaced from the first array antenna, and the second array antenna includes a plurality of antennas. A second antenna unit, the plurality of second antenna units being arranged along the first direction and the second direction to generate radiation in a third direction, the third direction and the first direction and The second directions are all perpendicular. The antenna structure according to item 7 of the scope of patent application, wherein each of the first antenna units and each of the second antenna units are millimeter wave antennas. The antenna structure according to item 7 in the scope of patent application, wherein each of the second antenna units includes a ground layer, a first substrate, a first radiating portion, a second substrate, and a second radiating portion, and the first substrate The first radiating portion is disposed between the first substrate and the second substrate, and is electrically connected to a feeding source through a feeding portion, and the second substrate is provided. On the side of the first radiating portion away from the first substrate, the second radiating portion is disposed on a surface of the second substrate away from the first radiating portion. When the feed source feeds current, The current flows through the first radiating portion, and then directly flows into or is coupled to the second radiating portion, so that the first radiating portion and the second radiating portion generate two different resonance frequencies. The antenna structure according to item 9 of the scope of patent application, wherein the second antenna unit further includes a frame portion, the frame portion is disposed on a surface of the second substrate away from the first radiation portion, and It is provided around the second radiating part, and the second antenna unit is further provided with a plurality of second vias, and the plurality of second vias pass through the second substrate and the first substrate in order to communicate with each other. The frame body portion and the ground layer, the frame body portion, the second via hole, and the ground layer are all made of a metal material, and the ground layer, the second via hole, and the frame body All parts have the function of electromagnetic shielding, so that the radiation of the second antenna unit is concentrated to the third direction. A wireless communication device includes the antenna structure according to any one of claims 1-10 of the scope of patent application.