Antenna structure and wireless communication device

Abstract

The invention provides an antenna structure and a wireless communication device, the antenna structure comprises a dielectric substrate, a radiation unit, a feed unit and a grounding unit, the dielectric substrate comprises a first surface and a second surface which are oppositely arranged, the radiation unit is arranged on the first surface, an outer frame is formed on the radiation unit, and a plurality of branches distributed in a staggered manner are formed in the outer frame; the feed unit is arranged on the first surface and is vertically connected with one side of the radiation unit to feed an electric signal into the radiation unit; and the grounding unit is arranged on one side, close to the feed unit, of the second surface of the dielectric substrate, and the grounding unit is used for providing grounding for the antenna structure. Because the radiation unit is provided with the outer frame, the plurality of branches distributed in a staggered manner are formed in the outer frame, an electric signal fed in from the feed unit passes through the outer frame and the plurality of branches distributed in the staggered manner to generate a plurality of current paths, and the plurality of different current paths and the grounding unit resonate to generate radiation signals with different wavelengths; therefore, the bandwidth of the antenna structure can be effectively expanded, and a good omnidirectional radiation characteristic is provided.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and particularly to an antenna structure and a wireless communication device. Background Art

[0002] World Interoperability for Microwave Access (WiMAX) technology is a wireless metropolitan area network access technology based on the IEEE802.16 standard and plays an important role in assisting WIFI or WIFI hotspot networks. With the rapid development of wireless communication technology, the requirements for electronic devices are becoming more and more precise, and related technologies have been continuously improving. The demand for WIFI applications in enterprises, shopping malls, etc. is also increasing, and the requirement for network speed is getting higher and higher. It is necessary to design an antenna that meets sufficient bandwidth and has good omnidirectional radiation characteristics. Summary of the Invention

[0003] In view of the above problems, it is necessary to provide an antenna structure and a wireless communication device.

[0004] In a first aspect of this application, an antenna structure is provided. The antenna structure includes: a dielectric substrate including a first surface and a second surface disposed opposite to each other; a radiation unit disposed on the first surface, the radiation unit forming an outer frame, and a plurality of branches are formed in the outer frame and are distributed in an interleaved manner; a feeding unit disposed on the first surface and perpendicularly connected to one side of the radiation unit, the feeding unit being configured to feed an electrical signal into the radiation unit; and a grounding unit disposed on the dielectric substrate, the grounding unit being disposed on one side of the second surface close to the feeding unit, the grounding unit being configured to provide grounding for the antenna structure.

[0005] In one embodiment of the first aspect, the outer frame includes a first side frame, a second side frame, a third side frame, and a fourth side frame. The first side frame is parallel to the third side frame, the second side frame is parallel to the fourth side frame, and the first side frame is perpendicularly connected to the second side frame and the fourth side frame; the radiation unit is provided with a plurality of slot holes, so that a plurality of branches are formed in the outer frame and are distributed in an interleaved manner.

[0006] In one embodiment of the first aspect, the plurality of branches formed in the outer frame and distributed in an interleaved manner includes:

[0007] The first radiating stub, one end of the first radiating stub is connected to the first frame border, and the other end of the first radiating stub is connected to the third frame border; the second radiating stub, one end of the second radiating stub is connected to the second frame border, and the other end of the second radiating stub is connected to the fourth frame border, and the second radiating stub is perpendicularly connected to the first radiating stub; wherein, the first radiating stub and the second radiating stub divide the area within the outer frame into a first area, a second area, a third area, and a fourth area having slot holes.

[0008] In one embodiment of the first aspect, the first area and the second area are distributed on one side close to the first frame border, the third area and the fourth area are distributed on one side close to the third frame border, and the first area is close to the second frame border, and the fourth area is close to the fourth frame border; the outer frame further includes a plurality of stubs formed with staggered distribution: the third radiating stub, the third radiating stub is formed in the first area, one end of the third radiating stub is connected to the first frame border, and the other end of the third radiating stub is connected to the second radiating stub; the fourth radiating stub, the fourth radiating stub is formed in the fourth area, one end of the fourth radiating stub is connected to the second radiating stub, and the other end of the fourth radiating stub is connected to the third frame border; wherein, the third radiating stub and the fourth radiating stub are symmetrically arranged with respect to the connection point of the first radiating stub and the second radiating stub.

[0009] In one embodiment of the first aspect, the third radiating stub includes a first radiating segment, a second radiating segment, a third radiating segment, a fourth radiating segment, and a fifth radiating segment; one end of the first radiating segment is perpendicularly connected to the first frame border, and the other end of the first radiating segment extends away from the first frame border and is perpendicularly connected to one end of the second radiating segment; the other end of the second radiating segment extends towards the second frame border and is perpendicularly connected to one end of the third radiating segment; the other end of the third radiating segment extends towards the second radiating stub and is perpendicularly connected to one end of the fourth radiating segment; the other end of the fourth radiating segment extends towards the first radiating stub and is perpendicularly connected to one end of the fifth radiating segment; the other end of the fifth radiating segment is perpendicularly connected to the second radiating stub.

[0010] In one embodiment of the first aspect, the outer frame further includes a plurality of stubs formed with staggered distribution: the fifth radiating stub, the fifth radiating stub is formed in the fourth area, one end of the fifth radiating stub is connected to the first radiating stub, and the other end of the fifth radiating stub is connected to the fourth frame border, and the fifth radiating stub is connected to the fourth radiating stub.

[0011] In one embodiment of the first aspect, the outer frame is formed with a plurality of branches distributed in a staggered manner, further including: a sixth radiation branch formed in the second region, one end of the sixth radiation branch is connected to the first side frame, and the other end of the sixth radiation branch is connected to the fourth side frame.

[0012] In one embodiment of the first aspect, the outer frame is formed with a plurality of branches distributed in a staggered manner, further including: a seventh radiation branch formed in the third region, one end of the seventh radiation branch is perpendicularly connected to the second radiation branch, and the other end of the seventh radiation branch extends towards the third side frame and is perpendicularly connected to the third side frame; and an eighth radiation branch formed in the third region, one end of the eighth radiation branch is perpendicularly connected to the second side frame, and the other end of the eighth radiation branch extends towards the first radiation branch and is perpendicularly connected to the first radiation branch; wherein, the seventh radiation branch and the eighth radiation branch are perpendicularly connected.

[0013] In one embodiment of the first aspect, a slot is formed on one side of the grounding unit, and at least a part of the projection of the feeding unit on the second surface falls into the slot.

[0014] The second aspect of the present application provides a wireless communication device, and the wireless communication device includes the antenna structure as described above.

[0015] In the antenna structure provided by the present application, the radiation unit is disposed on the first surface of the dielectric substrate, the radiation unit is formed with an outer frame, and a plurality of branches are formed in the outer frame and distributed in a staggered manner; the feeding unit is disposed on the first surface of the dielectric substrate and perpendicularly connected to one side of the radiation unit to feed an electrical signal into the radiation unit; the grounding unit is disposed on the second surface of the dielectric substrate near the feeding unit, and the grounding unit is used to provide grounding for the antenna structure. Since the radiation unit is formed with an outer frame and a plurality of branches are formed in the outer frame and distributed in a staggered manner, the electrical signal fed from the feeding unit generates multiple current paths through the outer frame and the plurality of branches distributed in a staggered manner, and the multiple different current paths resonate with the grounding unit to radiate signals of different wavelengths, thereby effectively expanding the bandwidth of the antenna structure and providing good omnidirectional radiation characteristics. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the radiation unit and the feeding unit of the antenna structure according to the embodiment of the present application.

[0017] Figure 2 It is a schematic structural diagram of the grounding unit of the antenna structure according to the embodiment of the present application.

[0018] Figure 3 is Figure 1Enlarged view of the first region in

[0019] Figure 4 is Figure 1 Enlarged view of the fourth region in

[0020] Figure 5 is Figure 1 Enlarged view of the second region in

[0021] Figure 6 is Figure 1 Enlarged view of the third region in

[0022] Figure 7 Schematic diagram of the dimension labels of the dielectric substrate, radiation unit and feeding unit of the antenna structure according to the embodiment of the present application.

[0023] Figure 8 Schematic diagram of the dimension labels of the grounding unit of the antenna structure according to the embodiment of the present application.

[0024] Figure 9 Echo loss curve graph of the antenna structure according to the embodiment of the present application.

[0025] Figure 10 3D direction pattern graph of the antenna structure according to the embodiment of the present application.

[0026] Description of main component symbols

[0027] Antenna structure 100

[0028] Dielectric substrate 10

[0029] First surface 11

[0030] Second surface 12

[0031] Radiation unit 20

[0032] Outer frame 21

[0033] First frame 210

[0034] Second frame 211

[0035] Third frame 212

[0036] Fourth frame 213

[0037] First radiation branch 22

[0038] Second radiation branch 23

[0039] First region A

[0040] First slot a1

[0041] Second slot a2

[0042] Second region B

[0043] Seventh slot b1

[0044] Eighth slot b2

[0045] Third region C

[0046] Ninth slot c1

[0047] Fourth region D

[0048] Third slot d1

[0049] Fourth slot d2

[0050] Fifth slot d3

[0051] Sixth slot d4

[0052] Third radiation stub 24

[0053] First radiation section 240

[0054] Second radiation section 241

[0055] Third radiation section 242

[0056] Fourth radiation section 243

[0057] Fifth radiation section 244

[0058] Fourth radiation stub 25

[0059] Fifth radiation stub 26

[0060] Sixth radiation stub 27

[0061] Sixth radiation section 270

[0062] Seventh radiation section 271

[0063] Seventh radiation stub 28

[0064] Eighth radiation stub 29

[0065] Feeding unit 30

[0066] Grounding unit 40

[0067] Slot 41

[0068] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0069] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0071] Next, some embodiments of the present application will be described in detail in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0072] Please refer to Figure 1 and Figure 2 , an antenna structure 100 is provided in an embodiment of the present application. It can be disposed in a wireless communication device to transmit and receive wireless electromagnetic waves to transmit and exchange wireless signals, thereby realizing communication between the wireless communication device and other electronic devices. It can be understood that the wireless communication device includes, but is not limited to, electronic devices such as mobile phones, tablet computers, laptop computers, and WIMAX protocol devices.

[0073] Please continue to refer to Figure 1 and Figure 2 , the antenna structure 100 includes a dielectric substrate 10, a radiation unit 20, a feeding unit 30, and a grounding unit 40. The radiation unit 20, the feeding unit 30, and the grounding unit 40 are all disposed on the dielectric substrate 10.

[0074] Among them, the dielectric substrate 10 includes a first surface 11 and a second surface 12 that are oppositely disposed.

[0075] The radiation unit 20 is disposed on the first surface 11 of the dielectric substrate 10. The radiation unit 20 forms an outer frame 21, and a plurality of branches are formed in an interleaved manner within the outer frame 21.

[0076] The feeding unit 30 is also disposed on the first surface 11 of the dielectric substrate 10 and is perpendicularly connected to one side of the radiation unit 20 for feeding an electrical signal into the radiation unit 20.

[0077] The grounding unit 40 is disposed on the second surface 12 of the dielectric substrate 10 near the feeding unit 30. The grounding unit 40 is used to provide grounding for the antenna structure 100.

[0078] In the antenna structure 100 according to the embodiment of the present application, when an electrical signal is fed into the feeding unit 30, since the radiation unit 20 is formed with an outer frame 21, and a plurality of branches are formed in the outer frame 21 in a staggered distribution, the electrical signal fed into the feeding unit 30 generates multiple different current paths through the outer frame 21 and the plurality of branches in a staggered distribution. The multiple different current paths resonate with the grounding unit 40 to generate radiation signals of different wavelengths, so that the bandwidth of the antenna structure 100 can be effectively expanded and good omnidirectional radiation characteristics can be provided.

[0079] As Figure 1 shown, in some embodiments, the feeding unit 30 may be a microstrip feeder, which has the advantages of small volume, light weight, easy fabrication and integration.

[0080] In some specific examples, the feeding unit 30 may be connected to a feed source (not shown in the figure) through an SMA connector (not shown in the figure) to receive the electrical signal provided by the feed source.

[0081] Please refer to Figure 2 , in some embodiments, a slot 41 is formed on one side of the grounding unit 40, and at least a part of the projection of the feeding unit 30 on the second surface 12 falls into the slot 41.

[0082] Please continue to refer to Figure 1 , in some embodiments, the outer frame 21 includes a first frame 210, a second frame 211, a third frame 212 and a fourth frame 213. The first frame 210 is parallel to the third frame 212, the second frame 211 is parallel to the fourth frame 213, and the first frame 210 is perpendicularly connected to the second frame 211 and the fourth frame 213. Among them, a plurality of slots may be formed in the radiation unit 20 so that a plurality of branches are formed in the outer frame 21 in a staggered distribution.

[0083] Further, a first radiation branch 22 and a second radiation branch 23 may be formed in the outer frame 21. One end of the first radiation branch 22 is perpendicularly connected to the first frame 210, and the other end of the first radiation branch 22 is perpendicularly connected to the third frame 212. One end of the second radiation branch 23 is perpendicularly connected to the second frame 211, and the other end of the second radiation branch 23 is perpendicularly connected to the fourth frame 213. The second radiation branch 23 is perpendicularly connected to the first radiation branch 22. Thus, the first radiation branch 22 and the second radiation branch 23 together with the outer frame 21 form a "field" - shaped structure.

[0084] Among them, the first radiation branch 22 and the second radiation branch 23 divide the area inside the outer frame 21 into a first area A, a second area B, a third area C and a fourth area D with slots.

[0085] Further, the first region A and the second region B are distributed on one side close to the first frame 210, the third region C and the fourth region D are distributed on one side close to the third frame 212, and the first region A is close to the second frame 211, and the fourth region D is close to the fourth frame 213.

[0086] In some embodiments, the first radiating stub 22 may be connected to the midpoints of the first frame 210 and the third frame 212, and the second radiating stub 23 may be connected to the midpoints of the second frame 211 and the fourth frame 213. The first radiating stub 22 may be collinear with the feeding unit 30, and the second radiating stub 23 may be perpendicularly connected to the midpoint of the first radiating stub 22.

[0087] Please refer to again Figure 1 , in some embodiments, a third radiating stub 24 and a fourth radiating stub 25 may further be formed in the outer frame 21. The third radiating stub 24 is formed in the first region A. One end of the third radiating stub 24 is connected to the first frame 210, and the other end of the third radiating stub 24 is connected to the second radiating stub 23. The fourth radiating stub 25 is formed in the fourth region D. One end of the fourth radiating stub 25 is connected to the second radiating stub 23, and the other end of the fourth radiating stub 25 is connected to the third frame 212.

[0088] Wherein, the third radiating stub 24 and the fourth radiating stub 25 are symmetrically arranged with respect to the connection point of the first radiating stub 22 and the second radiating stub 23.

[0089] Please refer to Figure 3 , Figure 3 shows Figure 1 an enlarged view of the first region A in

[0090] One end of the first radiating section 240 is perpendicularly connected to the first frame 210, and the other end of the first radiating section 240 extends away from the first frame 210 and is perpendicularly connected to one end of the second radiating section 241; the other end of the second radiating section 241 extends towards the second frame 211 and is perpendicularly connected to one end of the third radiating section 242; the other end of the third radiating section 242 extends towards the second radiating stub 23 and is perpendicularly connected to one end of the fourth radiating section 243; the other end of the fourth radiating section 243 extends towards the first radiating stub 22 and is perpendicularly connected to one end of the fifth radiating section 244; the other end of the fifth radiating section 244 is perpendicularly connected to the second radiating stub 23.

[0091] Among them, the third radiation stub 24 is formed by opening a first slot a1 and a second slot a2 in the first region A. The first slot a1 is generally in a "C" shape, and the second slot a2 is generally in a "T" shape rotated counterclockwise by 90°.

[0092] It can be understood that since the third radiation stub 24 and the fourth radiation stub 25 are symmetrically arranged with respect to the connection of the first radiation stub 22 and the second radiation stub 23, therefore, the specific structure of the fourth radiation stub 25 is the same as that of the third radiation stub 24, and the specific structure of the fourth radiation stub 25 will not be described in detail here.

[0093] Please refer to again Figure 1 , in some embodiments, a fifth radiation stub 26 may further be formed in the outer frame 21. The fifth radiation stub 26 is formed in the fourth region D. One end of the fifth radiation stub 26 is connected to the first radiation stub 22, the other end of the fifth radiation stub 26 is connected to the fourth frame 213, and the fifth radiation stub 26 is connected to the fourth radiation stub 25.

[0094] Further, please refer to Figure 4 , Figure 4 shows an enlarged view of the fourth region D in Figure 1 . As shown in Figure 4 , the fifth radiation stub 26 and the fourth radiation stub 25 may intersect perpendicularly. Among them, the fourth radiation stub 25 and the fifth radiation stub 26 are formed by opening a third slot d1, a fourth slot d2, a fifth slot d3, and a sixth slot d4 in the fourth region D. The third slot d1, the fourth slot d2, the fifth slot d3, and the sixth slot d4 are all generally in an "L" shape. The third slot d1 and the fourth slot d2 are symmetric with respect to the fifth radiation stub 26, and the fifth slot d3 and the sixth slot d4 are also symmetric with respect to the fifth radiation stub 26.

[0095] Further, a sixth radiation stub 27 may further be formed in the outer frame 21. The sixth radiation stub 27 is formed in the second region B. One end of the sixth radiation stub 27 is connected to the first frame 210, and the other end of the sixth radiation stub 27 is connected to the fourth frame 213.

[0096] Please refer to Figure 5 , Figure 5 shows an enlarged view of the second region B in Figure 1 . Combining Figure 1 and Figure 5As shown, the sixth radiating branch 27 may include a sixth radiating section 270 and a seventh radiating section 271. One end of the sixth radiating section 270 is perpendicularly connected to the first frame 210. The other end of the sixth radiating section 270 extends in the direction close to the second radiating branch 23 and is perpendicularly connected to one end of the seventh radiating section 271. The other end of the seventh radiating section 271 extends in the direction close to the fourth frame 213 and is perpendicularly connected to the fourth frame 213.

[0097] Among them, the sixth radiating branch 27 can be formed by opening a seventh slot b1 and an eighth slot b2 in the second region B. The seventh slot b1 is generally in an "L" shape, and the eighth slot b2 is generally in a "square" shape.

[0098] Please refer to Figure 1 and Figure 6 As shown in, a seventh radiating branch 28 and an eighth radiating branch 29 can also be formed inside the outer frame 21. The seventh radiating branch 28 is formed in the third region C. One end of the seventh radiating branch 28 is perpendicularly connected to the second radiating branch 23. The other end of the seventh radiating branch 28 extends in the direction close to the third frame 212 and is perpendicularly connected to the third frame 212. The eighth radiating branch 29 is formed in the third region C. One end of the eighth radiating branch 29 is perpendicularly connected to the second frame 211. The other end of the eighth radiating branch 29 extends in the direction close to the first radiating branch 22 and is perpendicularly connected to the first radiating branch 22. Among them, the seventh radiating branch 28 and the eighth radiating branch 29 are perpendicularly connected. Among them, four ninth slots c1 can be opened in the third region C to form the seventh radiating branch 28 and the eighth radiating branch 29, so that the third region C is in a "field" shape.

[0099] Furthermore, the eighth radiating branch 29 and the fifth radiating branch 26 can be collinearly arranged.

[0100] In the embodiment of the present application, the radiation unit 20 can form the outer frame 21, the first radiating branch 22, the second radiating branch 23, the third radiating branch 24, the fourth radiating branch 25, the fifth radiating branch 26, the sixth radiating branch 27, the seventh radiating branch 28 and the eighth radiating branch 29 by opening the first slot a1, the second slot a2, the third slot d1, the fourth slot d2, the fifth slot d3, the sixth slot d4, the seventh slot b1, the eighth slot b2 and four ninth slots c1. Thus, when the feeding unit 30 feeds an electrical signal, multiple current paths are generated through the outer frame 21 and the aforementioned radiating branches, thereby effectively expanding the bandwidth of the antenna structure 100 and providing good omnidirectional radiation characteristics.

[0101] It can be understood that the lengths and widths among the first border 210, the second border 211, the third border 212, the fourth border 213, the first radiating stub 22, the second radiating stub 23, the third radiating stub 24, the fourth radiating stub 25, the fifth radiating stub 26, the sixth radiating stub 27, the seventh radiating stub 28, and the eighth radiating stub 29 can be different from each other, or some of them can be the same.

[0102] In some embodiments, the dielectric substrate 10 is rectangular, the outer frame 21 of the radiating unit 20 is also rectangular, and the center lines of the dielectric substrate 10 and the radiating unit 20 coincide. The feeding unit 30 is straight, the center line of the feeding unit 30 coincides with the center line of the dielectric substrate 10, and the feeding unit 30 is parallel to the two side edges of the dielectric substrate 10.

[0103] Please refer to Figure 2 , in some embodiments, the grounding unit 40 is rectangular, three side edges of the grounding unit 40 are aligned with three side edges of the dielectric substrate 10, the slot 41 is opened on the side edge of the grounding unit 40 located inside the dielectric substrate 10, and the center line of the slot 41 coincides with the center lines of the grounding unit 40 and the dielectric substrate 10.

[0104] In some specific examples, the overall dimensions of the antenna structure 100 are as Figure 7 , Figure 8 and Table 1 below:

[0105] <![CDATA[L h > <![CDATA[W h > <![CDATA[L g > 35 40 21 <![CDATA[W g > <![CDATA[L z > <![CDATA[W z > 24 12 3 <![CDATA[L f > <![CDATA[W f > <![CDATA[W e > 10 15 5

[0106] Among them, the unit of each dimension is: mm. Combining Figure 7 , Figure 8 and Table 1, it can be known that in the antenna structure 100, the length L h of the dielectric substrate 10 is 35 mm, and the width W h of the dielectric substrate 10 is 40 mm. The overall length L g of the radiating unit 20 is 21 mm, and the overall width W g of the radiating unit 20 is 24 mm. The length L z of the feeding unit 30 is 12 mm, and the width W z of the feeding unit 30 is 3 mm. The length L f of the grounding unit 40 is 10 mm, the width W e of the slot 41 is 5 mm, and the width W f of the two parts on both sides of the slot 41 of the grounding unit 40 is 15 mm.

[0107] Please refer to Figure 9 , Figure 9 shows the echo loss curve graph of the antenna structure 100 in this example. As Figure 9As shown, the frequency range of the antenna structure 100 with return loss less than -10 dB is 2.75 GHz to 4.35 GHz, and the center frequency is 3.5 GHz. It can be seen that the application frequency band of the antenna structure is 3.5 GHz, meeting the application frequency band of WiMAX communication technology.

[0108] Please refer to Figure 10 , Figure 10 which shows the 3D radiation pattern of the antenna structure 100 of this example. According to Figure 10 it can be known that the antenna structure 100 of this example has good radiation characteristics in multiple directions, that is, the antenna structure 100 of this example can provide good omnidirectional radiation characteristics, meeting the design requirements of the antenna structure 100.

[0109] Therefore, the antenna structure 100 of the embodiment of the present application is structurally compact, has a small volume, and has the characteristics of a wide frequency band and good omnidirectional radiation characteristics, and can also be applied to WiMAX communication technology.

[0110] The embodiment of the present application also provides a wireless communication device (not shown in the figure). The wireless communication device includes the aforementioned antenna structure 100, enabling the wireless communication device to have a wide frequency band, good omnidirectional radiation characteristics, and can also be applied to WiMAX communication technology.

[0111] The above embodiments are only used to illustrate the technical solutions of the present application and are not restrictive. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application. Those skilled in the art can also make other changes within the spirit of the present application for use in the design of the present application, as long as they do not deviate from the technical effects of the present application. These changes made in accordance with the spirit of the present application should all be included within the scope claimed by the present application.

Claims

1. An antenna structure, characterized in that, the antenna structure includes: a dielectric substrate, the dielectric substrate including a first surface and a second surface arranged opposite to each other; a radiation unit, the radiation unit being disposed on the first surface, the radiation unit forming a frame, and a plurality of branches being formed in the frame and distributed in a staggered manner; a feeding unit, the feeding unit being disposed on the first surface and perpendicularly connected to one side of the radiation unit, the feeding unit being used for feeding an electrical signal into the radiation unit; and a grounding unit, the grounding unit being disposed on the second surface on the side close to the feeding unit, the grounding unit being used for providing grounding for the antenna structure.

2. The antenna structure according to claim 1, characterized in that, the frame includes a first side frame, a second side frame, a third side frame, and a fourth side frame, the first side frame and the third side frame being arranged in parallel, the second side frame and the fourth side frame being arranged in parallel, and the first side frame being perpendicularly connected to the second side frame and the fourth side frame; a plurality of slot holes are formed in the radiation unit so that a plurality of branches are formed in the frame and distributed in a staggered manner.

3. The antenna structure according to claim 2, characterized in that, the plurality of branches formed in the frame and distributed in a staggered manner includes: a first radiation branch, one end of the first radiation branch being perpendicularly connected to the first side frame, and the other end of the first radiation branch being perpendicularly connected to the third side frame; a second radiation branch, one end of the second radiation branch being perpendicularly connected to the second side frame, and the other end of the second radiation branch being perpendicularly connected to the fourth side frame, the second radiation branch being perpendicularly connected to the first radiation branch; wherein, the first radiation branch and the second radiation branch divide the area inside the frame into a first area, a second area, a third area, and a fourth area having slot holes.

4. The antenna structure according to claim 3, characterized in that, the first area and the second area are distributed on the side close to the first side frame, the third area and the fourth area are distributed on the side close to the third side frame, and the first area is close to the second side frame, and the fourth area is close to the fourth side frame; the plurality of branches formed in the frame and distributed in a staggered manner further includes: a third radiation branch, the third radiation branch being formed in the first area, one end of the third radiation branch being connected to the first side frame, and the other end of the third radiation branch being connected to the second radiation branch; a fourth radiation branch, the fourth radiation branch being formed in the fourth area, one end of the fourth radiation branch being connected to the second radiation branch, and the other end of the fourth radiation branch being connected to the third side frame; wherein, the third radiation branch and the fourth radiation branch are symmetrically arranged with respect to the connection point of the first radiation branch and the second radiation branch.

5. The antenna structure according to claim 4, characterized in that, the third radiation branch includes a first radiation section, a second radiation section, a third radiation section, a fourth radiation section, and a fifth radiation section; One end of the first radiation section is perpendicularly connected to the first frame, and the other end of the first radiation section extends away from the first frame and is perpendicularly connected to one end of the second radiation section; the other end of the second radiation section extends towards the second frame and is perpendicularly connected to one end of the third radiation section; the other end of the third radiation section extends towards the second radiation branch and is perpendicularly connected to one end of the fourth radiation section; the other end of the fourth radiation section extends towards the first radiation branch and is perpendicularly connected to one end of the fifth radiation section; The other end of the fifth radiation section is perpendicularly connected to the second radiation branch.

6. The antenna structure according to any one of claims 3 to 4, characterized in that, the plurality of branches formed in the outer frame and distributed in an interleaved manner further includes: a fifth radiation branch, the fifth radiation branch is formed in the fourth region, one end of the fifth radiation branch is connected to the first radiation branch, the other end of the fifth radiation branch is connected to the fourth frame, and the fifth radiation branch is connected to the fourth radiation branch.

7. The antenna structure according to any one of claims 3 to 4, characterized in that, the plurality of branches formed in the outer frame and distributed in an interleaved manner further includes: a sixth radiation branch, the sixth radiation branch is formed in the second region, one end of the sixth radiation branch is connected to the first frame, and the other end of the sixth radiation branch is connected to the fourth frame.

8. The antenna structure according to any one of claims 3 to 4, characterized in that, the plurality of branches formed in the outer frame and distributed in an interleaved manner further includes: a seventh radiation branch, the seventh radiation branch is formed in the third region, one end of the seventh radiation branch is perpendicularly connected to the second radiation branch, and the other end of the seventh radiation branch extends towards the third frame and is perpendicularly connected to the third frame; and an eighth radiation branch, the eighth radiation branch is formed in the third region, one end of the eighth radiation branch is perpendicularly connected to the second frame, and the other end of the eighth radiation branch extends towards the first radiation branch and is perpendicularly connected to the first radiation branch; wherein, the seventh radiation branch and the eighth radiation branch are perpendicularly connected.

9. The antenna structure according to claim 1, characterized in that, a slot is formed on one side of the grounding unit, and at least a part of the projection of the feeding unit on the second surface falls into the slot.

10. A wireless communication device, characterized in that, the wireless communication device includes the antenna structure according to any one of claims 1 to 9.

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