CN110661083A

CN110661083A - Antenna structure and wireless communication device with same

Info

Publication number: CN110661083A
Application number: CN201811287439.1A
Authority: CN
Inventors: 宋昆霖; 李义杰; 陈永亲
Original assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chiun Mai Communication Systems Inc
Current assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chiun Mai Communication Systems Inc
Priority date: 2018-06-28
Filing date: 2018-10-31
Publication date: 2020-01-07
Also published as: TWI694643B; CN110661082A; TW202002400A; TWI691117B; CN110661084B; CN110661084A; TW202002402A

Abstract

The invention provides an antenna structure which comprises a frame, a first feed-in part, a first grounding part and a second grounding part, wherein a first breakpoint, a second breakpoint and a first radiation part are arranged on the frame, the frame between the first breakpoint and the second breakpoint forms the first radiation part, the first grounding point and the second grounding point are both connected with the first radiation part, the frame between the first feed-in point and one of the first grounding part and the second grounding part forms a branch, and the first feed-in part is electrically connected to the first radiation part and the branch so as to feed in current signals for the first radiation part and the branch. The invention also provides a wireless communication device with the antenna structure. The antenna structure and the wireless communication device with the same can cover LTE-A low, medium and high frequency bands, GPS frequency bands, WIFI 2.4GHz and WIFI5GHz frequency bands, and the frequency range is wide.

Description

Antenna structure and wireless communication device with same

Technical Field

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

Background

With the progress of wireless communication technology, electronic devices such as mobile phones and personal digital assistants are gradually developing towards the trend of function diversification, light weight, and faster and more efficient data transmission. However, the space for accommodating the antenna is smaller and smaller, and the bandwidth requirement of the antenna is increasing with the development of wireless communication technology. Therefore, how to design an antenna with a wider bandwidth in a limited space is an important issue for antenna design.

Disclosure of Invention

In view of the above, it is desirable to provide an antenna structure and a wireless communication device having the same.

An embodiment of the present invention provides an antenna structure applied to a wireless communication device, where the antenna structure includes a casing, a first feed-in portion, a first ground portion, and a second ground portion, the casing includes at least a back plate and a frame, the frame is disposed on a periphery of the back plate, the back plate is provided with a slot, the frame is provided with a first breakpoint, a second breakpoint, and a first radiation portion, the slot is disposed on an edge of the back plate and parallel to the frame, and one of the first breakpoint and the second breakpoint is disposed at one end of the slot; the first breakpoint and the second breakpoint are both through and partition the frame, the frame between the first breakpoint and the second breakpoint forms the first radiation part, the first ground part and the second ground part are both connected with the first radiation part, the first feed-in part forms a branch with the frame between the first ground part and one of the second ground part, and the first feed-in part is electrically connected to the first radiation part and the branch to feed current signals into the first radiation part and the branch.

An embodiment of the present invention provides a wireless communication device, which includes the antenna structure.

The antenna structure and the wireless communication device with the same can cover LTE-A low, medium and high frequency bands, GPS frequency bands, WIFI 2.4GHz and WIFI5GHz frequency bands, and the frequency range is wide.

Drawings

Fig. 1 is a schematic diagram illustrating an antenna structure applied to a wireless communication device according to a first preferred embodiment of the present invention.

Fig. 2 is an assembly diagram of the wireless communication device shown in fig. 1.

Fig. 3 is a circuit diagram of the antenna structure shown in fig. 1.

Fig. 4 is a schematic diagram of a current flow direction of the antenna structure shown in fig. 3 during operation.

Fig. 5 is a circuit diagram of a switching circuit in the antenna structure shown in fig. 3.

Fig. 6 is a graph of S-parameters (scattering parameters) when the antenna structure operates in the LTE-a low-frequency mode when the switching unit switches to different switching elements in the switching circuit shown in fig. 5.

Fig. 7 is a radiation efficiency diagram of the antenna structure operating in the LTE-a low frequency mode when the switching unit switches to different switching elements in the switching circuit shown in fig. 5.

Fig. 8 is a graph of S-parameters (scattering parameters) when the antenna structure operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the switching unit switches to different switching elements in the switching circuit shown in fig. 5.

Fig. 9 is a radiation efficiency diagram of the antenna structure operating in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the switching unit switches to different switching elements in the switching circuit shown in fig. 5.

Fig. 10 is a graph illustrating S parameters (scattering parameters) of the antenna structure shown in fig. 1 operating in a GPS mode and a WIFI 2.4GHz mode.

Fig. 11 is a radiation efficiency diagram of the antenna structure shown in fig. 1 operating in a GPS mode and a WIFI 2.4GHz mode.

Fig. 12 is a graph illustrating S-parameters (scattering parameters) of the antenna structure shown in fig. 1 operating in the WIFI5GHz mode.

Fig. 13 is a radiation efficiency graph of the antenna structure shown in fig. 1 operating in the WIFI5GHz mode.

Fig. 14 is a circuit diagram of an antenna structure according to a second preferred embodiment of the present invention.

Fig. 15 is a circuit diagram of an antenna structure according to a third preferred embodiment of the present invention.

Fig. 16 is a diagram illustrating an antenna structure applied to a wireless communication device according to a fourth preferred embodiment of the present invention.

Description of the main elements

Antenna structures

100, 100a, 100b

Wireless communication device

200, 200a, 200b, 200c

Housing 11

First ground point 210

Second ground point 211

A first feed-in point 212

Second feed-in points 213, 213b

A third feed-in point 214

First electronic component 215

Second electronic component 216

Third electronic component 217

Fourth electronic component 218

First feeding part 12

Second feeding part 13

Duplexer 14

First ground part 15

Second ground portion 16

First matching circuit 17

Switching circuit 18

Switching unit 181

Switching element 183

Frame 112

Back plate 113

Display unit 201

Accommodation space 114

Tip part 115

First side 116

Second side 117

First breakpoints

118, 118c

Second break points

119, 119c

Open slot 120

First radiation portion E1

Second radiation portion E2

Second matching circuits 131, 131b

Third matching circuit 141

Fourth matching circuit 151

Branch A1

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "electrically connected" to another component, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.

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 to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the 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 invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example 1

Referring to fig. 1 and 2, a first 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, a personal digital assistant, etc., for transmitting and receiving radio waves to transmit and exchange wireless signals.

Referring to fig. 3, the antenna structure 100 at least includes a housing 11, a first feeding portion 12, a second feeding portion 13, a first grounding portion 15, a second grounding portion 16, a first matching circuit 17 and a switching circuit 18.

The housing 11 may be an outer shell of the wireless communication device 200. The housing 11 includes at least a bezel 112 and a back plate 113. The frame 112 and the back plate 113 are made of metal material. In the present embodiment, the frame 112 has a substantially ring-shaped structure. The frame 112 is disposed on the periphery of the back plate 113, and is integrally formed with the back plate 113. An opening (not shown) is disposed on a side of the frame 112 away from the back plate 113 for accommodating the display unit 201 of the wireless communication device 200. It is understood that the display unit 201 has a display plane exposed at the opening.

The back plate 113 is disposed substantially in parallel with the display plane of the display unit 201 at a distance. It can be understood that, in the present embodiment, the back plate 113 and the frame 112 together form an accommodating space 114. The accommodating space 114 is used for accommodating electronic components or circuit modules such as a substrate and a processing unit of the wireless communication device 200 therein. It is understood that, in the present embodiment, the display unit 201 may be a full screen structure. In other embodiments, the display unit 201 may have a non-full screen structure, that is, the display unit 201 may have at least one notch (not shown).

The frame 112 includes at least a terminal portion 115, a first side portion 116, and a second side portion 117. In this embodiment, the terminal portion 115 may be a top end of the wireless communication device 200, i.e., the antenna structure 100 constitutes an upper antenna of the wireless communication device 200. The first side portion 116 and the second side portion 117 are disposed opposite to each other, and are disposed at both ends of the terminal portion 115, preferably, perpendicularly.

In the present embodiment, the frame 112 is provided with a first breakpoint 118 and a second breakpoint 119. The back plate 113 is provided with a slot 120. In this embodiment, the first breaking point 118 is opened at a position of the first side portion 116 close to the end portion 115. The second break point 119 is opened at a position of the end portion 115 close to the second side portion 117. The slot 120 is disposed at the edge of the back plate 113 and parallel to the frame 112. Specifically, the slot 120 is substantially an inverted U-shaped structure, and is opened inside the end portion 115 and extends toward the first side portion 116 and the second side portion 117, so that the end portion 115 and the back plate 113 are spaced apart and insulated from each other.

The first breaking point 118 and the second breaking point 119 are both connected to the slot 120 and extend to block the frame 112. In the present embodiment, the slot 120, the first break point 118 and the second break point 119 jointly define a first radiation portion E1 and a second radiation portion E2 spaced apart from the frame 112. In the present embodiment, the border 112 between the first break point 118 and the second break point 119 constitutes the first radiation portion E1. The bezel 112 of the second break point 119 on the side away from the first radiation portion E1 and the first break point 118 constitutes the second radiation portion E2.

In the present embodiment, the first radiating portion E1 and the back plate 113 are spaced and insulated from each other by the slot 120 and the first break 118. The side of the second radiating portion E2 away from the second break point 119 is connected to the bezel 112, so that the second radiating portion E2, the bezel 112 and the backplate 113 form an integrally formed frame.

In the present embodiment, the widths of the first breakpoint 118 and the second breakpoint 119 are both D1. The slot 120 has a width D2. In the present embodiment, the width D1 of the first breakpoint 118 and the second breakpoint 119 is 1-3 mm. The width D2 of the slot 120 is 0.5-1.5 mm. The first radiating part E1 and the second radiating part E2 are at least 1mm away from the metal element in the accommodating space 114. The first and second radiation sections E1 and E2 are at least 1mm away from a metal element in the display unit 201.

It is understood that, in the present embodiment, the first breaking point 118, the second breaking point 119 and the slot 120 are filled with an insulating material, such as plastic, rubber, glass, wood, ceramic, etc., but not limited thereto.

It is understood that in other embodiments, the shape of the slot 120 is not limited to the U shape described above, and may be adjusted according to specific requirements, for example, it may also be straight, oblique, zigzag, and so on.

Obviously, the shape and position of the slot 120 and the positions of the first breakpoint 118 and the second breakpoint 119 on the frame 112 can be adjusted according to specific requirements, and it is only necessary to ensure that the slot 120, the first breakpoint 118 and the second breakpoint 119 can jointly divide the first radiation portion E1 and the second radiation portion E2 from the frame 112 at intervals.

In this embodiment, the antenna structure 100 further includes a first grounding point 210, a second grounding point 211, a first feeding point 212, and a second feeding point 213. The first grounding point 210 and the second grounding point 211 are spaced apart to provide grounding for the antenna structure 100. The first feeding point 212 is disposed between the first grounding point 210 and the second grounding point 211 for feeding current to the antenna structure 100. The second feeding point 213 is disposed at a side of the second grounding point 211 away from the first grounding point 210, for feeding current into the antenna structure 100.

It is understood that the wireless communication device 200 further comprises at least one electronic component. In the present embodiment, the wireless communication device 200 includes at least four electronic components, namely a first electronic component 215, a second electronic component 216, a third electronic component 217, and a fourth electronic component 218. The first electronic element 215, the second electronic element 216, the third electronic element 217, and the fourth electronic element 218 are disposed in the accommodating space 114 and are located between the first feeding point 212 and the second feeding point 213.

In this embodiment, the first electronic component 215 is an audio interface module disposed between the second grounding point 211 and the second feeding point 213, and disposed close to the second grounding point 211. The second electronic component 216 is a front camera module, and is located between the first feeding point 212 and the second grounding point 211. The third electronic component 217 is a receiver module, which is located between the second grounding point 211 and the second electronic component 216 and is disposed close to the second electronic component 216. The fourth electronic component 218 is an earphone module, and is disposed between the first feeding point 212 and the second electronic component 216.

It is understood that the second disconnection point 119 corresponds to the first electronic component 215, such that the first electronic component 215 is partially exposed from the second disconnection point 119. In this way, a user can insert an audio component (e.g., a headset) through the second disconnection point 119, and thus establish an electrical connection with the first electronic component 215. The first electronic element 215, the second electronic element 216, the third electronic element 217, and the fourth electronic element 218 are all disposed to be spaced apart from the first radiation portion E1 through the slot 120.

The first feeding portion 12 is disposed inside the housing 11 and located between the fourth electronic element 218 and the first grounding portion 15. One end of the first feeding element 12 is electrically connected to the first radiating element E1, and the other end is electrically connected to the first feeding point 212 through the first matching circuit 17, so as to feed a current signal into the first radiating element E1.

It is understood that, in the present embodiment, the first matching circuit 17 may be an L-type matching circuit, a T-type matching circuit, a pi-type matching circuit, or other combinations of capacitors, inductors, and capacitors and inductors for adjusting the impedance matching of the first radiation portion E1.

The second feeding portion 13 is disposed inside the housing 11. The second feeding portion 13 is disposed between the first electronic element 215 and the second side portion 117. One end of the second feeding element 13 is electrically connected to the second radiation element E2, and the other end is electrically connected to the second feeding point 213 through a second matching circuit 131, so as to feed a current signal to the second radiation element E2.

It is understood that, in the present embodiment, the second matching circuit 131 may be an L-type matching circuit, a T-type matching circuit, a pi-type matching circuit, or other combinations of capacitors, inductors, and capacitors and inductors for adjusting the impedance matching of the second radiation portion E2.

In the present embodiment, the first grounding portion 15 is disposed inside the housing 11 and located between the first breaking point 118 and the first feeding portion 12. One end of the first grounding portion 15 is electrically connected to the first grounding point 210 through the switching circuit 18, and the other end is electrically connected to the end of the first radiation portion E1 close to the first breakpoint 118, so as to provide grounding for the first radiation portion E1. The second ground portion 16 is disposed inside the housing 11 and located between the first electronic element 215 and the third electronic element 217. One end of the second ground portion 16 is electrically connected to the first radiating portion E1, and the other end is electrically connected to the second ground point 211 through the third matching circuit 141, thereby providing a ground for the first radiating portion E1.

In the present embodiment, the frame 112 between the first feeding portion 12 and the second grounding portion 16 forms a branch a 1. It can be understood that, in the present embodiment, the first feeding portion 12, the branch a1 and the second grounding portion 16 constitute an inverted-F antenna.

It is understood that, referring to fig. 4, when a current is fed from the first feeding element 12, the current is fed into the first radiation element E1 through the first feeding element 12, so as to excite a first mode to generate a radiation signal of a first frequency band (see path P1). In addition, when the current is fed from the first feeding portion 12, the current also flows through the branch a1, the second grounding portion 16 and the third matching circuit 141 in sequence, and is grounded through the second grounding point 211, so as to excite a second mode to generate a radiation signal of a second frequency band (see path P2).

When a current is fed from the second feeding element 13, the current is fed into the second radiation element E2 through the second feeding element 13 and grounded through the frame 112, so as to excite a third mode to generate a radiation signal of a third frequency band (see path P3).

In this embodiment, the first modality is a long term evolution-Advanced (LTE-a) low frequency modality. The second mode comprises an LTE-A intermediate frequency mode and an LTE-A high frequency mode. The third modality may include one or more of a Global Positioning System (GPS) modality, a WIFI 2.4GHz modality, and a WIFI5GHz modality. The second frequency band has a higher frequency than the first frequency band. The frequency of the third frequency band is higher than the frequency of the first frequency band. The frequency of the first frequency band is 700-960 MHz. The frequencies of the second frequency band are 1710-. The frequency of the third frequency band may include one or more of 1575MHz, 2400-.

In this embodiment, the first feeding element 12 and the first radiating element E1 form a first antenna. The first feeding element 12, the branch a1 and the second grounding element 16 constitute a second antenna. The second feeding element 13 and the second radiation element E2 form a third antenna. Wherein the first antenna is a Planar Inverted-F antenna (PIFA). The second antenna is a PIFA antenna or a diversity antenna. The third antenna is a GPS antenna, a WIFI 2.4 antenna and a WIFI5GHz antenna.

Referring to fig. 5, in the present embodiment, the switching circuit 18 includes a switching unit 181 and at least one switching element 183. The switching unit 181 may be a single-pole single-throw switch, a single-pole double-throw switch, a single-pole triple-throw switch, a single-pole four-throw switch, a single-pole six-throw switch, a single-pole eight-throw switch, or the like. The switching unit 181 is electrically connected to the first radiation part E1. The switching element 183 may be an inductor, a capacitor, or a combination of an inductor and a capacitor. The switching elements 183 are connected in parallel, and one end thereof is electrically connected to the switching unit 181, and the other end thereof is electrically connected to the first grounding point 210, i.e. the ground.

In this manner, by controlling the switching of the switching unit 181, the first radiation portion E1 can be switched to a different switching element 183. Since each of the switching elements 183 has different impedance, the frequency band of the first radiation portion E1 can be adjusted by switching of the switching unit 181. For example, in the present embodiment, the switching circuit 18 may include four switching elements 183 having different impedances. By switching the first radiation portion E1 to four different switching elements 183, the low frequency of the first mode in the antenna structure 100 can respectively cover the LTE-a Band8 Band (880-960MHz), the LTE-a Band5 Band (824-894MHz), the LTE-a Band13 Band (746-787MHz), and the LTE-a Band17 Band (704-746 MHz).

Fig. 6 is a graph of S-parameters (scattering parameters) of the antenna structure 100 in the LTE-a low frequency mode when the switching unit 181 is switched to the different switching element 183 in the switching circuit 18 shown in fig. 5. Wherein the curve S701 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band8 frequency Band (880-960 MHz). The curve S702 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band5 frequency Band (824-894 MHz). The curve S703 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band13 frequency Band (746-787 MHz). The curve S704 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band17 frequency Band (704-746 MHz).

Fig. 7 is a radiation efficiency graph of the antenna structure 100 operating in the LTE-a low frequency mode when the switching unit 181 is switched to the different switching element 183 in the switching circuit 18 shown in fig. 5. Wherein the curve S801 is a radiation efficiency curve when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band8 frequency Band (880-960 MHz). Curve S802 is a radiation efficiency curve when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band5 frequency Band (824-894 MHz). Curve S803 is the radiation efficiency curve when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-ABand13 frequency band (746-. Curve S804 is a radiation efficiency curve when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 operates in the LTE-a Band17 frequency Band (704-746 MHz).

Fig. 8 is a graph of S-parameters (scattering parameters) when the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the switching unit 181 switches to different switching elements 183 in the switching circuit 18 shown in fig. 5. The curve S901 is an S11 value when the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the first antenna is switched to the LTE-a Band8 frequency Band (880-960 MHz). The curve S902 is the S11 value when the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the first antenna is switched to the LTE-a Band5 frequency Band (824-894 MHz). The curve S903 is the S11 value when the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the first antenna is switched to the LTE-a Band13 frequency Band (746-787 MHz). The curve S904 is the S11 value when the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the first antenna is switched to the LTE-ABand17 frequency band (704-746 MHz).

Fig. 9 is a radiation efficiency graph of the antenna structure 100 operating in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the switching unit 181 is switched to different switching elements 183 in the switching circuit 18 shown in fig. 5. The curve S1001 is a radiation efficiency curve when the first antenna is switched to the LTE-a Band8 frequency Band (880-960MHz), and the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode. The curve S1002 is a radiation efficiency curve when the first antenna is switched to the LTE-ABand5 frequency band (824-894MHz), and the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode. The curve S1003 is a radiation efficiency curve when the first antenna is switched to the LTE-a Band13 frequency Band (746-787MHz), and the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode. The curve S1004 is a radiation efficiency curve diagram when the antenna structure 100 operates in the LTE-a intermediate frequency mode and the LTE-a high frequency mode when the first antenna is switched to the LTE-a Band17 frequency Band (704 — 746 MHz).

Fig. 10 is a graph of S parameters (scattering parameters) when the antenna structure 100 operates in a GPS mode, a WIFI 2.4GHz mode, and a WIFI5GHz mode.

Fig. 11 is a radiation efficiency curve diagram of the antenna structure 100 operating in a GPS mode, a WIFI 2.4GHz mode, and a WIFI5GHz mode.

Fig. 12 is a graph illustrating S-parameters (scattering parameters) of the antenna structure 100 operating in the WIFI5GHz mode.

Fig. 13 is a radiation efficiency graph of the antenna structure 100 operating in the WIFI5GHz mode.

It is obvious from fig. 6 to 13 that the first feeding portion 12, the first radiating portion E1, and the first grounding portion 15 in the antenna structure 100 are mainly used to excite the LTE-a low frequency mode, and the switching circuit 18 is used to switch the low frequency of the antenna structure 100 to at least cover the LTE-a Band8 Band (880 + 960MHz), the LTE-a Band17 Band (704 + 746MHz), the LTE-a Band5 Band (824 + 894MHz), the LTE-a Band13 Band (746 + 787MHz), and the LTE-a Band17 Band (704 + 746 MHz). The first feeding portion 12, the branch a1 and the second grounding portion 16 of the antenna structure 100 are mainly used for exciting an LTE-a intermediate frequency mode and an LTE-a high frequency mode. In the antenna structure 100, the second feed-in portion 13 and the second radiation portion E2 are mainly used for exciting a GPS mode, a WIFI 2.4GHz mode, and a WIFI5GHz mode.

Furthermore, when the antenna structure 100 operates in the LTE-A Band8 frequency Band (880-960MHz), the LTE-A Band17 frequency Band (704-746MHz), the LTE-A Band5 frequency Band (824-894MHz), the LTE-A Band13 frequency Band (746-787MHz), and the LTE-A Band17 frequency Band (704-746MHz), the LTE-A intermediate frequency Band, the LTE-A high frequency Band, the GPS frequency Band, the WIFI 2.4GHz frequency Band, and the WIFI5GHz frequency Band of the antenna structure 100 are not affected. That is, when the switching circuit 18 switches, the switching circuit 18 is only used to change the LTE-a low-frequency mode of the antenna structure 100 and does not affect the LTE-a intermediate-frequency mode, the LTE-a high-frequency mode, the GPS mode, the WIFI 2.4GHz mode, and the WIFI5GHz mode.

Example 2

Referring to fig. 14, an antenna structure 100a according to a second preferred embodiment of the present invention is applicable to a wireless communication device 200a, such as a mobile phone, a personal digital assistant, etc., for transmitting and receiving radio waves to transmit and exchange wireless signals.

In the present embodiment, the wireless communication device 200a includes at least four electronic components, namely a first electronic component 215, a second electronic component 216, a third electronic component 217, and a fourth electronic component 218.

The antenna structure 100a at least includes a back plate 113, a frame 112, a first feeding part 12, a second feeding part 13, a first grounding part 15, a second grounding part 16, a first matching circuit 17, a second matching circuit 131, a third matching circuit 141, a fourth matching circuit 151, and a switching circuit 18.

The antenna structure 100a further includes a first grounding point 210, a second grounding point 211, a first feeding point 212, a second feeding point 213 and a third feeding point 214.

The frame 112 is provided with a first breaking point 118, a second breaking point 119 and a slot 120. In the present embodiment, the first breaking point 118 and the second breaking point 119 are both communicated with the slot 120.

In the present embodiment, the slot 120, the first break point 118 and the second break point 119 jointly define a first radiating portion E1 and a second radiating portion E2 spaced apart from the frame 112.

The portion from the first feeding portion 12 to the second grounding portion 16 constitutes a branch a 1.

The second feeding portion 13 is disposed between the first electronic element 215 and the second side portion 117. One end of the second feeding part 13 is electrically connected to the second radiation part E2. The other end of the second feeding part 13 is connected to the second feeding point 213 through the second matching circuit 131. The other end of the second feeding part 13 is further connected to the third feeding point 214 through the fourth matching circuit 151. The second feeding point 213 and the third feeding point 214 can feed current signals to the second radiation element E2, so that the second radiation element E2 excites the third mode to generate the radiation signal of the third frequency band.

It is understood that, in the present embodiment, the antenna structure 100a is different from the antenna structure 100 in that the antenna structure 100a further includes a fourth matching circuit 151 and a third feeding point 214. In this embodiment, one end of the fourth matching circuit 151 is electrically connected to the second feeding portion 13, and the other end is electrically connected to the third feeding point 214.

In this embodiment, the current path of the antenna structure 100a is the same as the current path of the antenna structure 100, and is not described herein again.

Example 3

Referring to fig. 15, an antenna structure 100b according to a third preferred embodiment of the present invention is applicable to a wireless communication device 200b, such as a mobile phone, a personal digital assistant, etc., for transmitting and receiving radio waves to transmit and exchange wireless signals.

In the present embodiment, the wireless communication device 200b includes at least four electronic components, namely a first electronic component 215, a second electronic component 216, a third electronic component 217, and a fourth electronic component 218.

The antenna structure 100b at least includes a back plate 113, a frame 112, a first feeding part 12, a second feeding part 13, a first grounding part 15, a second grounding part 16, a first matching circuit 17, a second matching circuit 131b, a third matching circuit 141, and a switching circuit 18.

The antenna structure 100b further includes a first grounding point 210, a second grounding point 211, a first feeding point 212, a second feeding point 213b, and a third feeding point 214.

The second feeding portion 13 is disposed between the first electronic element 215 and the second side portion 117. One end of the second feeding element 13 is electrically connected to the second radiating element E2, and the other end is respectively connected to the second feeding point 213b and the third feeding point 214 through the second matching circuit 131b and the duplexer 14. The second feeding point 213b and the third feeding point 214 can feed current signals to the second radiation element E2, so that the second radiation element E2 excites the third mode to generate a radiation signal of the third frequency band.

It is understood that, in the present embodiment, the antenna structure 100b is different from the antenna structure 100 in that the antenna structure 100b further includes a duplexer 14 and a third feeding point 214, and the position of the second matching circuit 131b in the antenna structure 100b is different from the position of the second matching circuit 131 in the antenna structure 100. Specifically, in the present embodiment, one end of the second matching circuit 131b is electrically connected to the second feeding part 13, and the other end is electrically connected to the duplexer 14. In this embodiment, one end of the duplexer 14 is electrically connected to the second matching circuit 131b, and the other end is electrically connected to the third feeding point 214 and the second feeding point 213 b.

It is understood that in the present embodiment, the current path of the antenna structure 100b is the same as the current path of the antenna structure 100, and is not described herein again.

Example 4

It is understood that in other embodiments, the positions of the first breaking point 118 and the second breaking point 119 can be adjusted according to specific situations. For example, as shown in fig. 16, the first breaking point 118c is opened at a position of the second side portion 117 near the end portion 115. The second break point 119c is opened at a position of the distal portion 115 close to the first side portion 116. The antenna structure 100 of the present embodiment is left-right opposite to the antenna structure 100 of the previous embodiment.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention. Those skilled in the art can also make other changes and the like in the design of the present invention within the spirit of the present invention as long as they do not depart from the technical effects of the present invention. Such variations are intended to be included within the scope of the invention as claimed.

Claims

1. An antenna structure is applied to a wireless communication device and is characterized in that the antenna structure comprises a shell, a first feed-in part, a first grounding part and a second grounding part, the shell at least comprises a back plate and a frame, the frame is arranged on the periphery of the back plate, a notch is arranged on the back plate, a first breakpoint, a second breakpoint and a first radiation part are arranged on the frame, the notch is arranged on the edge of the back plate and is parallel to the frame, and one of the first breakpoint and the second breakpoint is arranged at one end of the notch; the first breakpoint and the second breakpoint are both through and partition the frame, the frame between the first breakpoint and the second breakpoint forms the first radiation part, the first ground part and the second ground part are both connected with the first radiation part, the first feed-in part forms a branch with the frame between the first ground part and one of the second ground part, and the first feed-in part is electrically connected to the first radiation part and the branch to feed current signals into the first radiation part and the branch.

2. The antenna structure of claim 1, characterized in that: the frame includes terminal portion, first lateral part and second lateral part at least, first lateral part with the second lateral part is connected respectively the both ends of terminal portion, the fluting is seted up in the inboard of terminal portion, and respectively towards first lateral part with the second lateral part place direction extends, first breakpoint is seted up in first lateral part is close to the position of terminal portion, the second breakpoint is seted up in terminal portion is close to the position of second lateral part.

3. The antenna structure of claim 1, characterized in that: the antenna structure comprises a first matching circuit, wherein one end of the first feed-in part is connected with the first radiation part and the branch, and the other end of the first feed-in part is electrically connected to a first feed-in point through the first matching circuit and is used for feeding current signals into the first radiation part and the branch so as to enable the first radiation part and the branch to respectively excite a first mode and a second mode to generate radiation signals of a first frequency band and a second frequency band; the first mode is an LTE-A low-frequency mode, and the second mode comprises an LTE-A intermediate-frequency mode and an LTE-A high-frequency mode.

4. The antenna structure of claim 1, characterized in that: the antenna structure comprises a second feed-in part and a second matching circuit, wherein the second breakpoint is far away from the first radiation part and the frame on one side of the first breakpoint forms a second radiation part, one end of the second feed-in part is connected with the second radiation part, and the other end of the second feed-in part is electrically connected to a second feed-in point through the second matching circuit and is used for feeding current signals into the second radiation part, so that the second radiation part is excited to a third mode to generate radiation signals of a third frequency band; the third mode comprises one or more modes of a GPS mode, a WIFI 2.4GHz mode and a WIFI5GHz mode.

5. The antenna structure of claim 3, characterized in that: the antenna structure comprises a switching circuit and a third matching circuit, wherein one end of the first grounding part is electrically connected to a first grounding point through the switching circuit, and the other end of the first grounding part is electrically connected to the first radiation part for providing grounding for the first radiation part; one end of the second grounding part is electrically connected to the first radiation part, the other end of the second grounding part is electrically connected to a second grounding point through the third matching circuit, so that grounding is provided for the first radiation part, and the frame between the first feed-in part and the second grounding part forms the branch.

6. The antenna structure of claim 3, characterized in that: the antenna structure comprises a switching circuit and a third matching circuit, wherein one end of the first grounding part is electrically connected to a first grounding point through the third matching circuit, and the other end of the first grounding part is electrically connected to the first radiation part for providing grounding for the first radiation part; one end of the second grounding part is electrically connected to the first radiation part, the other end of the second grounding part is electrically connected to the second grounding point through the switching circuit, so that grounding is provided for the first radiation part, and the frame between the first feed-in part and the first grounding part forms the branch.

7. The antenna structure of claim 4, characterized in that: the antenna structure further comprises a fourth matching circuit, and the other end of the second feed-in part is further connected to a third feed-in point through the fourth matching circuit, so that a current signal is fed into the second radiation part, and the second radiation part is excited to a third mode to generate a radiation signal of a third frequency band.

8. The antenna structure of claim 4, characterized in that: the antenna structure still includes the duplexer, the one end of duplexer passes through second matching circuit electricity is connected to the second radiation portion, the other end electricity connect third feed-in point with the second feed-in point, and then do second radiation portion feed-in current signal, and then make the second radiation portion arouses the third mode is in order to produce the radiation signal of third frequency channel.

9. The antenna structure of claim 3, characterized in that: the antenna structure further comprises a switching circuit, the switching circuit comprises a switching unit and a plurality of switching elements, the switching unit is electrically connected to the first radiation part, the switching elements are connected in parallel, one end of each switching element is electrically connected to the switching unit, the other end of each switching element is grounded, each switching element has different impedance, and the switching unit is switched to different switching elements by controlling the switching of the switching unit, so that the first frequency band is adjusted.

10. A wireless communication apparatus, characterized in that: the wireless communication device comprising an antenna structure according to any of claims 1-9.

11. The wireless communications apparatus of claim 10, wherein: the wireless communication device comprises a first electronic element, a second electronic element, a third electronic element and a fourth electronic element, wherein the first electronic element, the second electronic element, the third electronic element and the fourth electronic element are all positioned between a first feed-in point of the antenna structure and a second feed-in point of the antenna structure; the second breaking point corresponds to the first electronic component such that the first electronic component is partially exposed from the second breaking point.