TWI814057B - Antenna structure and wireless communication device with same - Google Patents

Abstract

The present invention provides an antenna structure and a wireless communication device with same. The antenna structure is applied to the wireless communication device. The wireless communication device includes a metal frame and a metal element. The antenna structure is arranged in a gap between the metal element and the metal frame. The antenna structure includes a first grounding portion, a second grounding portion, a third grounding portion, a radiating portion and a feeding portion. The first grounding portion, the second grounding portion and the third grounding portion are arranged at intervals in turn. The first grounding portion, the second grounding portion and the third grounding portion are connected to the metal frame. One end of the radiating portion is connected with the second grounding portion and the third grounding portion, and the other end of the radiating portion is connected with the first grounding portion. The feeding portion is electrically connected to the radiating portion and the first grounding portion to feed current to the antenna structure.

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.

With the popularity of wireless communication devices, consumers have higher requirements for the appearance of wireless communication devices. The appearance design trend of wireless communication device products is increasingly moving toward metallization and thinning. However, the metal appearance can easily form a shielding effect on the antenna, reducing the transmission characteristics of the antenna. Therefore, how to design an antenna with good transmission characteristics under an all-metal appearance has become a challenge for those skilled in the art.

To address the above problems, it is necessary to provide an antenna structure and a wireless communication device having the antenna structure.

In one aspect, the present invention provides an antenna structure for use in a wireless communication device. The wireless communication device includes a metal frame and a metal component. The antenna structure is disposed in a gap between the metal component and the metal frame. The antenna structure includes: a first ground part, a second ground part and a third ground part. The first ground part, the second ground part and the third ground part are arranged at intervals in sequence. The first ground part, The second ground part and the third ground part are both connected to the metal frame; a radiation part, one end of the radiation part is connected to the second ground part and the third ground part, and the other end of the radiation part is connected to the first ground part; a feed source, the feed A source is electrically connected to the radiating part and the first ground part for feeding current into the antenna structure.

Another aspect of the present invention also provides a wireless communication device, which includes a frame, and the wireless communication device includes the antenna structure as described above.

The antenna structure provided by the present invention is provided with a first ground part, a second ground part, a third ground part and a radiating part, and the first ground part, the second ground part and the third ground part are all provided with On one side of the frame of the wireless communication device and connected to the frame, the radiating part is disposed on a side of the second ground part and the third ground part away from the frame, and the radiating part is connected to the frame. The second ground part and the third ground part are connected. In this way, when the antenna structure is installed in a wireless communication device with an all-metal back cover, there is no need to divide the frame to meet the design requirements for antenna operation, have good anti-interference characteristics, and ensure that the wireless communication device its aesthetics.

200:Wireless communication device

201:Border

202:Metal back cover

203, 203’: middle frame

204:Display screen

205:Containment space

206:gap

207:Gap

208:Metal components

209:Metal layer

100, 300: Antenna structure

10:First grounding part

11: First bending section

12: The second bending section

13: The third bending section

20:Second grounding part

21: The fourth bending section

22: The fifth bending section

30: The third grounding part

31: The sixth bending section

32: The seventh bending section

40, 40a: Radiation Department

41:Ontology

42:Extended section

50: Feed source

60, 60a: extension

70, 70a: matching circuit

C1: first capacitor

C2: second capacitor

C3: The third capacitor

C4: The fourth capacitor

L1: first inductor

L2: Second inductor

L3: The third inductor

L4: The fourth inductor

FIG. 1 is a schematic three-dimensional view of a wireless communication device according to an embodiment of the present invention.

FIG. 2 is a partially disassembled schematic diagram of the wireless communication device shown in FIG. 1 in an embodiment of the present application.

FIG. 3 is a partially disassembled schematic diagram of the wireless communication device shown in FIG. 1 in another embodiment of the present application.

FIG. 4 is a schematic diagram of the antenna structure of the wireless communication device shown in FIG. 3 .

FIG. 5 is a schematic diagram of the dimensions and structure of the antenna structure shown in FIG. 4 .

Figure 6 is a matching circuit diagram provided by an embodiment of the present invention.

FIG. 7 is a schematic diagram of the current flow when the antenna structure shown in FIG. 4 is working.

Figure 8 is a return loss curve of the antenna structure shown in Figure 4.

Figure 9 is a radiation efficiency curve of the antenna structure shown in Figure 4.

FIG. 10 is a schematic diagram of an antenna structure provided by another embodiment of the present invention.

FIG. 11 is a schematic diagram of the dimensions and structure of the antenna structure shown in FIG. 10 .

Figure 12 is a matching circuit diagram provided by another embodiment of the present invention.

FIG. 13 is a schematic diagram of the current flow when the antenna structure shown in FIG. 10 is working.

Figure 14 is a return loss curve of the antenna structure shown in Figure 10.

FIG. 15 is a radiation efficiency curve of the antenna structure shown in FIG. 10 .

Figure 16 is a return loss curve of the antenna structure shown in Figure 10 in different states.

FIG. 17 is a radiation efficiency curve of the antenna structure shown in FIG. 10 in different states.

Figure 18 is a return loss curve of the antenna structure shown in Figure 10 in the free state and in the SAR value test environment of 0mm back surface.

Figure 19 is a radiation efficiency curve of the antenna structure shown in Figure 10 in the free state and in the SAR value test environment of 0mm back surface.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments may be combined with each other unless there is any conflict.

Please refer to FIG. 1 and FIG. 2 together. One embodiment of the present invention provides an antenna structure 100 that can be used in a wireless communication device 200 to transmit and receive radio waves to transmit and exchange wireless signals. The wireless communication device 200 can be a wireless communication device such as a tablet computer, a mobile phone, a personal digital assistant, a smart watch, a television, or a smart car.

In this embodiment, the wireless communication device 200 at least includes a metal frame 201 and a metal back cover 202 .

The metal frame 201 is made of metal material, and the metal frame 201 may be an outer frame of the wireless communication device 200 . The metal frame 201 is disposed on the edge of the metal back cover 202 . In this way, the metal frame 201 and the metal back cover 202 constitute the casing of the wireless communication device 200, and the metal frame 201 and the metal back cover 202 together form a receiving space 205 with an opening.

The wireless communication device 200 also includes a metal component 208 . Referring to FIG. 2 , in some embodiments, the metal component 208 may be the middle frame 203 . That is, the middle frame 203 is made of metal material. The middle frame 203 is received in the receiving space 205, and the middle frame 203 and the metal back cover 202 are arranged approximately parallel and spaced apart. The middle frame 203 is used to carry electronic components (Fig. not shown).

Please refer to FIG. 3 as well. In some embodiments, the metal component 208 can be a metal cable, a metal shield plate, a printed circuit board, a flexible circuit board, a retaining wall, a control chip, a camera module and other electronic components. Any of them. It can be understood that the metal component 208 is provided on the middle frame 203'. The middle frame 203' is received in the receiving space 205, and the middle frame 203' and the metal back cover 202 are arranged approximately parallel and spaced apart. It can be understood that in this embodiment, the middle frame 203' can be made of metal material or plastic material.

The wireless communication device 200 also includes a display screen 204 . In this embodiment, the display screen 204 may be a touch display screen, which may be used to provide an interactive interface to enable the user to interact with the wireless communication device 200 . The display screen 204 is arranged in the receiving space 205 , and the display screen 204 and the metal back cover 202 are arranged approximately parallel and spaced apart.

The antenna structure 100 can be directly made of metal sheets, or made by laser direct structuring (LDS).

Please refer to Figures 3 and 4 together. In this embodiment, the antenna structure 100 is disposed in the gap 206 between the metal element 208 and the metal frame 201, that is, it is disposed in the receiving space 205. .

In this embodiment, the antenna structure 100 includes a first ground portion 10 , a second ground portion 20 , a third ground portion 30 and a radiation portion 40 .

The first ground portion 10 , the second ground portion 20 and the third ground portion 30 are arranged at intervals in sequence, and are all arranged on one side of the metal frame 201 . The first ground portion 10 , the second ground portion 20 and the third ground portion 30 are all connected to the metal frame 201 .

In this embodiment, the first grounding portion 10 includes a first bending section 11, a second The bending section 12 and the third bending section 13. The first bending section 11 is generally in the shape of a rectangular sheet. One side of the first bending section 11 is attached to the inner surface of the metal frame 201. In this way, the plane of the first bending section 11 is substantially perpendicular to the plane of the metal back cover 202, and the The first bending section 11 is connected to the metal frame 201 . The second bending section 12 is generally in the shape of a rectangular sheet. The plane of the second bending section 12 and the plane of the first bending section 11 are perpendicular to each other. The second bending section 12 is connected to an end of the first bending section 11 away from the metal back cover 202 , extends toward the side where the second grounding portion 20 is located, and forms a connection with the metal frame 201 An acute angle. The third bending section 13 is generally in the shape of a rectangular sheet. The third bending section 13 is connected to an end of the second bending section 12 away from the first bending section 11 and is connected along the metal The frame 201 extends parallel to and in a direction close to the second ground portion 20 .

The second grounding portion 20 includes a fourth bending section 21 and a fifth bending section 22 . The fourth bending section 21 is generally in the shape of a rectangular sheet. One side of the fourth bending section 21 is attached to the inner surface of the metal frame 201. In this way, the plane of the fourth bending section 21 is substantially perpendicular to the plane of the metal back cover 202, and the The fourth bending section 21 is connected to the metal frame 201 . The fifth bending section 22 is generally in the shape of a rectangular sheet. The plane where the fifth bending section 22 is located and the plane where the fourth bending section 21 is located are perpendicular to each other. The fifth bending section 22 is connected to an end of the fourth bending section 21 away from the metal back cover 202 , and extends vertically in a direction away from the metal frame 201 .

The third grounding portion 30 includes a sixth bending section 31 and a seventh bending section 32 . The sixth bending section 31 is generally in the shape of a rectangular sheet. One side of the sixth bending section 31 is attached to the inner surface of the metal frame 201. In this way, the plane of the sixth bending section 31 is substantially perpendicular to the plane of the metal back cover 202, and the The sixth bending section 31 is connected to the metal frame 201 . The seventh bending section 32 is generally in the shape of a rectangular sheet. The plane where the seventh bending section 32 is located and the plane where the sixth bending section 31 is located are perpendicular to each other. The seventh bending section 32 is connected to an end of the sixth bending section 31 away from the metal back cover 202 , and extends vertically in a direction away from the metal frame 201 .

The radiating part 40 is disposed on a side of the second ground part 20 and the third ground part 30 away from the metal frame 201 . One end of the radiating part 40 is connected to the second ground part 20 and the third ground part 30 , and the other end of the radiating part 40 is connected to the first ground part 10 . Specifically, the radiating part 40 may be connected to the fifth bending section 22 of the second grounding part 20 and the seventh bending section 32 of the third grounding part 30 .

In this embodiment, the second bending section 12 , the third bending section 13 , the fifth bending section 22 , the seventh bending section 32 and the radiating part 40 are arranged coplanarly. , the plane where the first bending section 11 , the fourth bending section 21 , and the sixth bending section 31 are located and the plane where the radiating part 40 is located are perpendicular to each other. In this way, the plane where the radiating part 40 is located and the plane where the metal back cover 202 is located are parallel to each other.

It can be understood that the antenna structure 100 further includes a feed source 50 . The feeding source 50 is electrically connected to the radiating part 40 for feeding current into the radiating part 40 of the antenna structure 100 . The first ground portion 10 is also electrically connected to the feed source 50 for providing ground for the feed source 50 . It can be understood that the radiating part 40 and the first ground part 10 are connected through the feed source 50 .

In this embodiment, the antenna structure 100 further includes an extension portion 60 . In this embodiment, the extension portion 60 is generally in an inverted L shape. One end of the extension part 60 is connected to the radiating part 40 , and the other end extends for a certain distance away from the radiating part 40 , and then moves closer to the radiating part 40 . The direction of the first grounding portion 10 is vertically bent and extended for a certain distance, and is spaced apart from the first grounding portion 10 .

A side of the extension portion 60 away from the first ground portion 10 and a side of the radiation portion 40 away from the second ground portion 20 and the third ground portion 30 are flush with each other.

In this embodiment, the extension part 60 and the radiating part 40 are arranged coplanarly. Therefore, the plane where the radiating part 40 and the extension part 60 are located is parallel to the plane where the metal back cover 202 is located. And because the metal back cover 202 has a radiation shielding function, the radiating part 40 and the extending part 60 radiate most of the energy in the direction of the display screen 204, which can meet the design requirements for antenna operation.

In this way, in this embodiment, the antenna structure 100 does not need to set interruption points or slots on the metal frame 201, that is, the metal frame 201 can be a complete and continuous metal frame, so that the antenna structure 100 works fine.

Of course, in other embodiments, the metal frame 201 can also be provided with slots or interruption points to serve as the frame antenna of the wireless communication device 200, thereby assisting or working together with the antenna structure 100 to achieve energy radiation.

It can be understood that in an optional embodiment, the second ground portion 20 , the third ground portion 30 , the radiating portion 40 and the extension portion 60 are an integrally formed structure.

It can be understood that a support member (not shown in the figure) can be provided below the radiating part 40 , the extending part 60 , the first ground part 10 , the second ground part 20 and the third ground part 30 ) to enhance the stability of the antenna structure 100.

Please refer to FIGS. 3 and 4 again. In one embodiment, the metal component 208 is disposed roughly corresponding to the middle of the metal frame 201 . The metal component 208 has at least one metal layer 209 . In this way, the metal layer 209 is formed in the wireless communication device 200 and is spaced apart from the metal frame 201 to form the gap 206 .

It can be understood that the antenna structure 100 is disposed in the gap 206 . The radiating part 40 is disposed close to the metal layer 209 , and further forms the gap 207 with the metal layer 209 . In this way, when the current is fed from the feeding source 50, it will flow through the radiating part 40 and be coupled to the metal layer 209 through the gap 207, thereby causing the antenna structure 100 to generate an additional frequency band (see More details later). In this embodiment, the metal layer 209 and the metal frame 201 are parallel to each other.

Please continue to refer to FIG. 5 , which is a schematic diagram of the dimensions and structure of the antenna structure 100 . In this embodiment, the width g1 of the gap 207 is 0.5 mm. The width g2 of the gap 206 is 6.7 mm. The length l1 of the radiation part 40 is 30.7 mm. The width W1 of the radiating part 40 is 5.2 mm. The distance g3 between the radiating part 40 and the metal frame 201 is 1.5 mm. The length l2 of the extension part 60 is 10 mm. The width W2 of the end of the extension part 60 close to the radiating part 40 is 2.4 mm, and the width W3 of the end of the extension part 60 away from the radiating part 40 is 3.6 mm. The feed source 50 is vertically mapped to the metal frame 201 as the center point O. Along the direction in which the metal frame 201 extends, the distance lg1 from the center point O to the first ground portion 10 is 5.7 mm. The distance lg2 from the center point O to the second ground part 20 is 6.7 mm, and the distance lg3 from the center point O to the third ground part 30 is 24.2 mm.

Please continue to refer to FIG. 6 . In an optional embodiment, the feed source 50 is also connected to the antenna structure 100 through a matching circuit 70 . The matching circuit 70 includes a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2. Among them, one end of the first capacitor C1 Connected to the antenna structure 100, for example, connected to the radiating part 40 of the antenna structure 100, the other end of the first capacitor C1 is connected to one end of the second capacitor C2, the other end of the second capacitor C2 Ground. One end of the first inductor L1 is connected between the first capacitor C1 and the second capacitor C2, and the other end is connected to ground. One end of the second inductor L2 is connected between the first capacitor C1 and the first inductor L1 , and the other end is connected to the feed source 50 . In this way, the feeding source 50 feeds electrical signals into the antenna structure 100 through the matching circuit 70 .

In this embodiment, the capacitance values of the first capacitor C1 and the second capacitor C2 are both 0.3 picofarads (pf). The inductance value of the first inductor L1 is 3 nanohenry (nh), and the inductance value of the second inductor L2 is 2 nanohenry (nh).

Please refer to FIG. 7 , which is a schematic diagram of the current flow when the antenna structure 100 is working. When the current is fed from the feeding source 50, the current will flow through the radiating part 40 and be grounded through the third grounding part 30 (refer to the path P1), thereby stimulating the first working mode. state and the second operating mode to generate radiation signals in the first frequency band and the second frequency band. Wherein, the frequency of the first frequency band is lower than the frequency of the second frequency band, and the frequency of the second frequency band is a multiple of the first frequency band.

When the current is fed from the feeding source 50, the current will flow through the radiating part 40 and be grounded through the second grounding part 20 (refer to path P2), thereby stimulating the third operating mode. Generate the radiation signal of the third frequency band.

When the current is fed from the feeding source 50, the current will flow through the radiating part 40, and then flow through the extending part 60 (refer to path P3), thereby stimulating the fourth operating mode to generate a fourth Radiated signal in the frequency band.

When the current is fed from the feeding source 50, the current will flow through the radiating part 40 and be coupled to the metal layer 209 (refer to path P4) through the gap 207, thereby excitating The fifth working mode is used to generate the radiation signal of the fifth frequency band.

In this embodiment, the first working mode is the WIFI2.4G mode, and the first frequency band includes 2400MHz-2480MHz. The second working mode is the WIFI6E working mode, and the second frequency band includes 6500MHz-7105MHz. The third working mode is also the WIFI6E working mode, and the third frequency band includes 5946MHz-6500MHz. The fourth working mode is the WIFI5G working mode, and the fourth frequency band includes 5170MHz-5330MHz. The fifth working mode is the Sub-6G working mode, and the fifth frequency band includes 3300MHz-3600MHz.

Please continue to refer to Figure 8 and Figure 9 together. FIG. 8 is a return loss (Return Loss) curve of the antenna structure 100 when it is working. It can be seen from Figure 8 that the antenna structure 100 can work in the corresponding first frequency band (2400MHz-2480MHz), second frequency band (6500MHz-7105MHz), third frequency band (5946MHz-6500MHz), fourth frequency band (5170MHz- 5330MHz) and the fifth frequency band (3300MHz-3600MHz). That is, it covers WIFI2.4G, WIFI5G, WIFI6E and Sub-6G, with a wide frequency range, and when the antenna structure 100 works in the above frequency band, it can meet the antenna work design requirements.

FIG. 9 is a radiation efficiency curve of the antenna structure 100 when it is working. The radiation efficiency of the first frequency band is approximately -3.9dB, the radiation efficiency of the second frequency band and the third frequency band is approximately -1.5dB, and the radiation efficiency of the fourth frequency band is approximately -2.2dB. The radiation efficiency of the fifth frequency band is approximately -4.2dB. That is, the antenna structure 100 has better radiation efficiency when working.

It can be understood that in other embodiments, the antenna structure 100 can also be applied to 3G/4G/5G antennas, GPS antennas and Bluetooth antennas.

Please continue to refer to Figure 10. A second embodiment of the present invention provides an antenna structure 300. It can be applied to the wireless communication device 200. The antenna structure 300 includes a first ground part 10 , a second ground part 20 , a third ground part 30 , a radiation part 40 a , an extension part 60 a and a feed source 50 .

The structure of the antenna structure 300 is substantially the same as that of the antenna structure 100. The difference lies in that the structures of the radiating part 40a and the extending part 60a are different from the structures of the radiating part 40 and the extending part 60 in the antenna structure 100. .

In this embodiment, the radiation part 40a includes a body 41 and an extension section 42. The main body 41 is generally a square piece. The main body 41 is connected to the fifth bending section 22 and the seventh bending section 32 . One end of the extension section 42 is connected to an end of the main body 41 close to the second grounding portion 20 , and the other end of the extension section 42 extends away from the main body 41 . The width of the extension section 42 is smaller than the width of the main body 41 , and a side of the extension section 42 close to the second grounding part 20 and a side of the main body 41 close to the second grounding part 20 are parallel to each other. Qi. In this way, the extension section 42 and the body 41 together form a gap 43 .

In this embodiment, the extension portion 60a is also generally in an inverted L shape. One end of the extension part 60a is connected to the second bending section 12 of the first ground part 10, and the other end extends for a certain distance away from the metal frame 201, and then at a right angle in the direction close to the radiating part 40a. It is bent and extended for a certain distance to extend into the notch 43 and is spaced apart from the main body 41 and the extension section 42 of the radiating part 40a.

In this embodiment, the extension portion 60a, the extension section 42, the body 41, the second bending section 12, the third bending section 13, the fifth bending section 22 and The seventh bending sections 32 are arranged coplanarly.

It can be understood that the difference between the antenna structure 300 in this embodiment and the antenna structure 100 in the first embodiment lies in the size of the antenna structure 300 and the size of the antenna structure 100. inches are different. Specifically, please continue to refer to FIG. 11. In this embodiment, the width g1' of the gap 207 between the radiating part 40a and the metal layer 209 is also 0.5 mm, and the gap between the metal layer 209 and the metal frame 201 is 0.5 mm. The distance g2' is 6.7 mm. The distance g3' between the radiating part 40a and the metal frame 201 is 1.5 mm. Taking the feed source 50 to be vertically mapped to the metal frame 201 as the center point O', along the direction in which the metal frame 201 extends, the distance lg1' from the center point O' to the first ground portion 11 is 5.7 mm, the distance lg2' from the center point O' to the second ground part 20 is 9.7 mm, and the distance lg3' from the center point O' to the third ground part 30 is 32.7 mm. The length l1' of the main body 41 is 29 mm, and the width W1' of the main body 41 is 5.2 mm. The length l2' of the extension section 42 is 8.7 millimeters, and the width W2' of the extension section 42 is 2.7 millimeters. The length l3' of the extension part 60a is 16 mm, the width W3' of the end of the extension part 60a away from the radiating part 40a is 6.6 mm, and the width W3' of the end of the extension part 60a close to the radiating part 40a Width W4' is 1.5 mm.

It can be understood that in this embodiment, the feed source 50 is also connected to the antenna structure 300 through a matching circuit 70a. The difference between the antenna structure 300 and the antenna structure 100 is also that the circuit structure of the matching circuit 70a is different from the circuit structure of the matching circuit 70. Specifically, referring to FIG. 12 , the matching circuit 70a includes a third capacitor C3, a fourth capacitor C4, a third inductor L3 and a fourth inductor L4. One end of the third capacitor C3 is connected to the antenna structure 300 , for example, to the radiation portion 40 a and the first ground portion 10 of the antenna structure 300 . The other end of the third capacitor C3 is connected to one end of the third inductor L3 , and the other end of the third inductor L3 is connected to the feed source 50 . One end of the fourth capacitor C4 is connected between the third capacitor C3 and the third inductor L3, and the other end of the fourth capacitor C4 is connected to ground. One end of the fourth inductor L4 is connected between the third capacitor C3 and the antenna structure 300 . The other end is connected to ground.

In one embodiment, the capacitance value of the third capacitor C3 is 0.5 pf, and the capacitance value of the fourth capacitor C4 is 0.3 pf. The inductance values of the third inductor L3 and the fourth inductor L4 are both 1.5 nanohenries (nh).

It can be understood that in this embodiment, the current flow direction and working principle of the current path P1' in the antenna structure 300 and the current path P1 in the antenna structure 100 are the same, and will not be described again. In addition, the difference between the antenna structure 300 and the antenna structure 100 in the first embodiment is that the current paths P2', P3' and P4' of the antenna structure 300 are different from the current paths P4' in the antenna structure 100. The current flow directions of path P2, current path P3 and current path P4 are different.

Please continue to refer to FIG. 13 , which is a schematic diagram of the current flow when the antenna structure 300 is working. When the current is fed from the feeding source 50, the current flows through the radiating part 40a and is grounded through the second grounding part 20 (refer to path P2'), thereby stimulating the sixth operating mode. Generates the radiation signal of the sixth frequency band.

When the current is fed from the feeding source 50, the current will flow through the radiating part 40a and be coupled to the extending part 60a (refer to path P3') through the extending section 42, thereby stimulating the seventh work. mode to generate the radiation signal of the seventh frequency band.

When the current is fed from the feeding source 50, the current will flow through the radiating part 40a and be coupled to the metal layer 209 (refer to path P4') through the gap 207, thereby stimulating the eighth Working mode to generate radiation signals in the eighth frequency band.

In this embodiment, the sixth working mode and the seventh working mode are also WIFI6E working modes, the sixth frequency band includes 5490MHz-5570MHz, and the seventh frequency band Including 5925MHz-7125MHz. The eighth operating mode is a Sub-6G operating mode, and the eighth frequency band includes 4400MHz-5000MHz.

Please continue to refer to Figure 14 and Figure 15. FIG. 14 is a return loss (Return Loss) curve of the antenna structure 300 when it is working. It can be seen from Figure 14 that the antenna structure 300 can work in the corresponding first frequency band (2400MHz-2480MHz), sixth frequency band (5490MHz-5570MHz), seventh frequency band (5925MHz-7125MHz) and eighth frequency band (4400MHz- 5000MHz). That is, it covers WIFI2.4G, WIFI5G, WIFI6E and Sub-6G, with a wide frequency range, and when the antenna structure 300 works in the above frequency band, it can meet the antenna work design requirements.

FIG. 15 is a radiation efficiency curve diagram of the antenna structure 300 when it is working. Among them, the radiation efficiency of the second frequency band reaches approximately -4.2dB. The radiation efficiency of the third frequency band is approximately -2.9dB. The radiation efficiency of the fourth frequency band is approximately -2.4dB. The radiation efficiency of the sixth frequency band is approximately -5.1dB. That is, the antenna structure 300 has better radiation efficiency when working.

Please refer to FIG. 1 , FIG. 16 and FIG. 17 together. FIG. 16 shows the return loss of the antenna structure 300 in different states when the antenna structure 300 is disposed in the wireless communication device 200 shown in FIG. 1 ( Return Loss) curve graph. The curve S1 is the return loss curve of the wireless communication device 200 in a free state; the curve S2 is the state when the wireless communication device 200 is held vertically with one hand and the hand touches the metal frame 201 The return loss curve; curve S3 is the return loss curve in a state where the wireless communication device 200 is held horizontally by both hands and the frames 201 on both sides of the wireless communication device 200 are touched by the hands.

FIG. 17 is a radiation efficiency curve of the antenna structure 300 in different states when the antenna structure 300 is disposed on the wireless communication device 200 shown in FIG. 1 . Among them, the curve S4 is the radiation efficiency curve of the wireless communication device 200 in a free state; curve S5 is the radiation efficiency curve of the wireless communication device 200 being held vertically with one hand and touching the metal frame 201 with the hand. ; Curve S6 is the radiation efficiency curve in a state where the wireless communication device 200 is held horizontally by both hands and the frames 201 on both sides of the wireless communication device 200 are touched by the hands.

Obviously, it can be seen from FIG. 16 and FIG. 17 that whether the wireless communication device 200 is held vertically with one hand or the wireless communication device 200 is held horizontally with both hands, the echo of the antenna structure 300 The loss is almost unchanged compared to the return loss of the antenna structure 300 in the free state, and the radiation efficiency of the antenna structure 300 is less than 1 dB lower than the radiation efficiency of the antenna structure 300 in the free state. In this way, when the antenna structure 300 is disposed in the wireless communication device 200, it has better anti-hand interference characteristics.

Please continue to refer to Figure 18 to Figure 19. FIG. 18 shows the Specific Absorption Ratio (SAR) of the wireless communication device 200 in the free state and on the 0mm back surface when the antenna structure 300 is disposed in the wireless communication device 200 shown in FIG. 1 . Return loss diagram under test environment. The curve S7 represents the return loss curve of the wireless communication device 200 in a free state, and the curve S8 represents the return loss curve of the wireless communication device 200 under the SAR value test environment of 0mm back surface.

FIG. 19 is a graph of the radiation efficiency of the wireless communication device 200 in a free state and in a 0mm back surface SAR value test environment when the antenna structure 300 is disposed in the wireless communication device 200 shown in FIG. 1 . . The curve S9 represents the radiation efficiency curve of the wireless communication device 200 in a free state, and the curve S10 represents the radiation efficiency curve of the wireless communication device 200 under the SAR value test environment of 0mm back surface.

Obviously, it can be seen from Figures 18 and 19 that the return loss curve of the wireless communication device 200 under the SAR value test environment of 0mm back surface is compared with the return loss curve of the wireless communication device 200 in the free state. There is almost no change; the radiation efficiency curve of the wireless communication device 200 under the SAR value test environment on the 0mm back surface has a smaller drop than the radiation efficiency curve of the wireless communication device 200 in the free state. It can be understood that since the SAR value test environment on the 0mm back surface simulates the environment when the human body is in contact with the metal back cover 202 of the wireless communication device 200, it can be seen from Figures 18 and 19 that the antenna structure 300 is disposed on the When the wireless communication device 200 is installed, the wireless communication device 200 has better anti-body interference characteristics.

Please continue to refer to the SAR value test table below. It can be seen from the SAR test table that the wireless communication device 200 equipped with the antenna structure 300 operates under WIFI2.4G (such as 2.4GHz, 2.44GHz and 2.48GHz), WIFI5G (such as 5.2GHz, 5.5GHz, 5.8GHz). And 5.9GHz) and WIFI6E (such as 6.5GHz and 7.1GHz) in each operating frequency band, and the signal strength is 18dBm or 15dBm, the measured SAR value of the metal back cover 202 is less than the safety regulation value 1.6, in line with wireless Design requirements for communication devices.

Obviously, the antenna structure 100 of the present invention is provided with a first ground portion 10, a second ground portion 20, a third ground portion 30 and a radiating portion 40, and the first ground portion 10, the second ground portion 20 and The third ground parts 30 are disposed on one side of the frame 201 of the wireless communication device 200 and are connected to the metal frame 201. The radiating part 40 is disposed on the second ground part 20 and the third ground part. The side of the radiating portion 30 away from the metal frame 201 is connected to the second ground portion 20 and the third ground portion 30 , and the radiating portion 40 and the metal back cover 202 are parallel to each other. . In this way, when the antenna structure 100 (or the antenna structure 300) is installed in the wireless communication device 200 with the all-metal back cover 202, the metal frame 201 does not need to be divided, and the design requirements for the antenna operation can be met, and it has good performance. Anti-interference characteristics, thereby ensuring the aesthetics of the wireless communication device 200.

The above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention 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 invention can be modified or equivalently replaced. None shall depart from the spirit and scope of the technical solution of the present invention. Those skilled in the art can also make other changes and other changes for the design of the present invention within the spirit of the present invention, as long as they do not deviate from the technical effect of the present invention. These changes made based on the spirit of the present invention should be included in the scope of protection claimed by the present invention.

100:Antenna structure

10:First grounding part

11: First bending section

12: The second bending section

13: The third bending section

20:Second grounding part

21: The fourth bending section

22: The fifth bending section

30: The third grounding part

31: The sixth bending section

32: The seventh bending section

40: Radiation Department

50: Feed source

60:Extension

207:Gap

208:Metal components

209:Metal layer

Claims (10)

An antenna structure is applied to a wireless communication device. The wireless communication device includes a metal frame and a metal component. The improvement is that the antenna structure is disposed in the gap between the metal component and the metal frame. The antenna The structure includes: a first grounding part, a second grounding part and a third grounding part. The first grounding part, the second grounding part and the third grounding part are arranged at intervals in sequence. The first grounding part, the The second ground part and the third ground part are both connected to the metal frame; a radiating part, one end of the radiating part is connected to the second ground part and the third ground part, and the radiating part The other end is connected to the first ground part; wherein, the radiating part is separated from the first ground part, the radiating part is connected to the first ground part through a feed source, and the feed An input source is electrically connected to the radiation part and the first ground part for feeding current into the antenna structure. The antenna structure according to claim 1, wherein the metal element has at least one metal layer, the antenna structure is disposed between the metal layer and the frame, and the radiating part is disposed close to the metal layer, And a gap is formed between the metal layer and the metal layer. The antenna structure according to claim 2, wherein the metal component is any one of a middle frame, a metal cable, a metal shield, a printed circuit board, a flexible circuit board, a control chip, a camera module or a retaining wall. . The antenna structure according to claim 1, wherein the antenna structure further includes an extension portion connected to one of the radiation portion and the first ground portion. The antenna structure according to claim 4, wherein one end of the extension part is connected to the radiating part, and the other end extends for a certain distance in a direction away from the radiating part, and then bends closer to the first ground part. extends in the direction and is spaced apart from the first ground portion. The antenna structure according to claim 4, wherein one end of the extension part is connected to From the first grounding part, the other end extends for a certain distance in a direction away from the metal frame, and then bends and extends in a direction close to the radiating part, and is spaced apart from the radiating part. The antenna structure according to any one of claims 4 to 6, wherein the extension part and the radiation part are arranged coplanarly. The antenna structure according to claim 1, wherein the metal frame is a complete and continuous frame. A wireless communication device, the improvement of which is that the wireless communication device includes a metal frame and the antenna structure as described in any one of claims 1 to 8. The antenna structure according to claim 9, wherein the wireless communication device further includes a metal back cover, and the radiating part is arranged parallel to the metal back cover.

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