TWI724754B - Antenna structure and wireless communication device with same - Google Patents

Abstract

The present invention provides an antenna structure including a housing, a first feeding portion, and a second feeding portion. The housing includes a metallic side frame and a metal backboard. The side frame defines a slot, a first gap, and a second gap. The metallic side frame between the first gap and one end of the slot forms a first radiating portion. The second gap divides the first radiating portion into a first radiating section and a second radiating section. The first radiating section is electrically connected to the second radiating section. The first feeding portion is electrically connected to the first radiating section for feeding current to the first radiating section, then the first radiating section works at a GPS mode and a WIFI 2.4GHz mode. The second radiating portion is electrically connected to the second radiating section for feeding current to the second radiating section, then the second radiating section works at a WIFI 5GHz mode.

Description

Antenna structure and wireless communication device with the antenna structure

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

With the advancement of wireless communication technology, electronic devices such as mobile phones and personal digital assistants continue to develop toward the trend of diversified functions, thinner and lighter, and faster and more efficient data transmission. However, the space that can accommodate the antenna is getting smaller and smaller, and with the continuous development of wireless communication technology, the demand for the bandwidth of the antenna is increasing. Therefore, how to design an antenna with a wider bandwidth in a limited space is an important issue facing antenna design.

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

An antenna structure, which is applied to a wireless communication device with a full screen, includes a metal casing, a first feeding portion and a second feeding portion. The metal casing includes a metal frame and a metal back plate. The metal frame surrounds the metal The edge of the back plate is arranged, the metal frame is provided with a slot, a first break point and a second break point, the first break point is connected to the slot, and the first break point is connected to the slot The metal frame between one of the end points forms a first radiating portion, and the second breaking point is opened in the metal frame and located between the first breaking point and the slot Between one end point, the first radiating section is further divided into a first radiating section and a second radiating section, the first radiating section is connected to the second radiating section, and the first feeding section is electrically connected to The first radiating section feeds a current signal to the first radiating section, so that the first radiating section works in GPS mode and WIFI 2.4GHz mode, and the second feeding section is electrically connected to the The second radiating section is used to feed a current signal to the second radiating section, so as to make the second radiating section work in the WIFI 5GHz mode. A wireless communication device includes the antenna structure described in the above item.

The above-mentioned antenna structure and the wireless communication device with the antenna structure are provided with the metal casing, and the antenna structure is divided from the metal casing by using the break points on the metal casing, so that a broadband design can be effectively realized.

100: Antenna structure

11: Metal shell

111: Metal frame

112: Metal backplane

113: Metal middle frame

115: End

116: first side

117: second side

118: Slotting

120: The first breakpoint

121: second breakpoint

122: third breakpoint

123: Gap

F1: The first radiation department

F11: The first radiation section

F12: second radiation section

F2: The second radiating part

12: The first feed-in part

13: The second feed-in part

14: The third feed-in part

15: The first grounding part

17: The second ground part

18: Switching circuit

181: switching unit

183: switching element

124, 131, 141, 151: matching circuit

200: wireless communication device

201: display unit

21: circuit board

210: Clearance area

211: The first feed point

212: second feed point

213: third feed point

214: first ground point

215: second ground point

22: The first electronic component

23: The second electronic component

24: The third electronic component

25: The fourth electronic component

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

Fig. 2 is a schematic diagram of the assembly of the wireless communication device shown in Fig. 1.

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

Fig. 4 is a schematic diagram of the current flow when the antenna structure shown in Fig. 3 works.

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

Fig. 6 is a graph of S parameters (scattering parameters) of the antenna structure shown in Fig. 4 operating in the LTE-A low-frequency mode.

FIG. 7 is a radiation efficiency diagram of the antenna structure shown in FIG. 4 operating in the LTE-A low-frequency mode.

Fig. 8 is a graph of S-parameters (scattering parameters) of the antenna structure shown in Fig. 4 operating in LTE-A medium and high-frequency modes.

Fig. 9 is a radiation efficiency diagram of the antenna structure shown in Fig. 4 operating in LTE-A medium and high frequency modes.

Fig. 10 is a graph of S parameters (scattering parameters) of the antenna structure shown in Fig. 4 operating in GPS mode and WIFI 2.4GHz mode.

Fig. 11 is a radiation efficiency diagram of the antenna structure shown in Fig. 4 working in GPS mode and WIFI 2.4GHz mode.

Fig. 12 is a graph of S parameters (scattering parameters) of the antenna structure shown in Fig. 4 operating in a WIFI 5GHz mode.

Fig. 13 is a diagram showing the total radiation efficiency of the antenna structure shown in Fig. 4 operating in the WIFI 5GHz mode.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those with ordinary knowledge in the field without creative work shall fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being "electrically connected" to another element, it can be directly connected to the other element or a central element may also exist. When an element is considered to be "electrically connected" to another element, it can be a contact connection, for example, a wire connection, or a non-contact connection, for example, a non-contact coupling.

Unless otherwise defined, all technical and scientific terms used in this article have the same meanings commonly understood by those with ordinary knowledge in the field. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

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

1 and 2, a preferred embodiment of the present invention provides an antenna structure 100, which can be applied to wireless communication devices 200 such as mobile phones, personal digital assistants, etc., to transmit and receive radio waves to transmit and exchange wireless signals . FIG. 1 is a schematic diagram of an antenna structure 100 applied to a wireless communication device 200. FIG. 2 is a schematic diagram of the assembly of the wireless communication device 200.

The antenna structure 100 includes a metal shell 11, a first feeding portion 12, a second feeding portion 13, a third feeding portion 14, a first grounding portion 15, a second grounding portion 17 and a switching circuit 18.

The metal shell 11 at least includes a metal frame 111, a metal back plate 112 and a metal middle frame 113. The metal frame 111 has a substantially ring-shaped structure and is made of metal or other conductive materials. The metal back plate 112 is made of metal or other conductive materials. The metal back plate 112 is disposed on the edge of the metal frame 111. An opening (not shown in the figure) is provided on the side of the metal frame 111 away from the metal back plate 112 for accommodating the display unit 201 of the wireless communication device 200. It can be understood that the display unit 201 has a display plane, and the display plane is exposed at the opening.

The metal middle frame 113 is roughly in the shape of a rectangular sheet, which is made of metal or other conductive materials. In this embodiment, the metal middle frame 113 is a metal sheet located between the display unit 201 and the metal back plate 112. The metal middle frame 113 is used to support the display unit 201, provide electromagnetic shielding, and improve the mechanical strength of the wireless communication device 200. It can be understood that the metal frame 111, the metal back plate 112, and the metal middle frame 113 can form an integrally formed metal frame.

It can be understood that, in this embodiment, the display unit 201 has a high screen-to-body ratio. That is, the area of the display plane of the display unit 201 is greater than 70% of the front area of the wireless communication device, and even a front full screen can be achieved. Specifically in this embodiment, the full screen refers to Except for the necessary slots provided in the antenna structure 100, the left, right, and lower sides of the display unit 201 can be seamlessly connected to the metal frame 111.

In this embodiment, the metal frame 111 at least includes an end portion 115, a first side portion 116, and a second side portion 117. The end portion 115 is the top of the wireless communication device 200, that is, 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 the two sides are respectively disposed at both ends of the end portion 115, preferably vertically.

The metal shell 11 is also provided with a slot 118 and at least one break point. Wherein, the slot 118 is opened on the metal frame 111. The slot 118 is substantially U-shaped, which is opened on the end portion 115 and extends in the direction of the first side portion 116 and the second side portion 117 respectively. It can be understood that, in this embodiment, the slot 118 is opened on the metal frame 111 at a position close to the metal back plate 112 and extends toward the direction where the display unit 201 is located. In this embodiment, the width of the slot 118 is approximately half of the width of the metal frame 111. That is, the slot 118 is disposed on a side of the metal frame 111 close to the metal back plate 112 and extends in a direction away from the metal back plate 112 to the middle of the metal frame 111.

In this embodiment, the metal shell 11 is provided with three break points, namely, a first break point 120, a second break point 121, and a third break point 122. The first break point 120, the second break point 121 and the third break point 122 are all opened on the metal frame 111. Specifically, the first break point 120 is opened on the end portion 115 and is located close to the first side portion 116. The second breakpoint 121 and the first breakpoint 120 are spaced apart. The second breaking point 121 is disposed on the first side portion 116 and is disposed close to the end portion 115. That is, the first break point 120 and the second break point 121 are arranged at the upper left corner of the metal shell 11. The third break point 122 is set at the On the second side portion 117 and close to the end portion 115. That is, the third break point 122 is set at the upper right corner of the metal shell 11. In this embodiment, the first break point 120 and the third break point 122 both penetrate and partition the metal frame 111 and communicate with the slot 118. The second break point 121 is opened in the metal frame 111 and extends in a direction close to the metal back plate 112 (or the slot 118). That is, the second break point 121 is a false break point, which is not connected to the slot 118.

The slot 118 and the at least one break point together divide at least two radiating parts from the metal shell 11. In this embodiment, the slot 118, the first break point 120, the second break point 121, and the third break point 122 collectively define a first radiating portion from the metal casing 11 F1 and the second radiating part F2. Wherein, in this embodiment, the first breaking point 120 and the metal frame 111 between the end points of the first side portion 116 of the slot 118 form the first radiating portion F1. The metal frame 111 between the first break point 120 and the third break point 122 forms the second radiating portion F2.

It can be understood that, in this embodiment, the second break point 121 is also used to further divide the first radiating portion F1 into two parts, that is, the first radiating section F11 and the second radiating section F12. Wherein, the metal frame 111 between the first break point 120 and the second break point 121 forms the first radiating section F11. The metal frame 111 between the second break point 121 and the end point of the first side portion 116 corresponding to the slot 118 forms the second radiating section F12. It can be understood that, in this embodiment, the second breakpoint 121 is a false breakpoint. Therefore, the first radiating section F11 and the second radiating section F12 are not separated from each other due to the arrangement of the second breaking point 121. That is, the first radiating section F11 and the second radiating section F12 are still connected together.

It can be understood that, in this embodiment, the metal middle frame 113 is close to the end portion A gap 123 is opened on one side of 115. The notch 123 is roughly U-shaped, that is, the notch 123 is opened in the portion of the metal middle frame 113 corresponding to the end portion 115, and is respectively along the middle of the metal middle frame 113 and the first side portion 116 and The parallel portion of the second side portion 117 extends, and then is substantially parallel to the slot 118 and communicates with the slot 118, the first break point 120 and the third break point 122.

It can be understood that, in this embodiment, the first radiating portion F1 is connected to the metal middle frame 113 and the metal back plate on one side of the end point of the first side portion 116 close to the slot 118 112, which is grounded. The second radiating portion F2 and the metal middle frame 113 are spaced apart and insulated from each other. In other words, in this embodiment, the slot 118 and the notch 123 can be used to separate the metal frame radiator (for example, the second radiating portion F2) and the metal back plate 112.

It can be understood that the widths of the first breakpoint 120, the second breakpoint 121, and the third breakpoint 122 are the same. In this embodiment, the widths of the first break point 120, the second break point 121, and the third break point 122 are all 1-2 mm.

It can be understood that in this embodiment, the slot 118, the first break point 120, the second break point 121, the third break point 122, and the gap 123 are all filled with insulating materials (such as plastic, Rubber, glass, wood, ceramics, etc., but not limited to this).

Please also refer to FIG. 3, the wireless communication device 200 further includes a circuit board 21 and at least one electronic component. The circuit board 21 is disposed in a space enclosed by the metal frame 111, the metal back plate 112 and the metal middle frame 113. One end of the circuit board 21 and the metal frame 111 are spaced apart, and a corresponding clearance area 210 is formed therebetween.

It can be understood that the circuit board 21 is further provided with a first feed point 211, a second feed point 212, a third feed point 213, a first ground point 214, and a second ground point 215. The first The feeding point 211, the second feeding point 212, the third feeding point 213, the first grounding point 214, and the second grounding point 215 are spaced apart from each other. The first feeding point 211, the second feeding point 212, and the third feeding point 213 are used to provide feeding signals for the antenna structure 100. The first ground point 214 and the second ground point 215 are used to provide ground for the antenna structure 100.

In this embodiment, the wireless communication device 200 includes at least four electronic components, namely, a first electronic component 22, a second electronic component 23, a third electronic component 24, and a fourth electronic component 25. The first electronic component 22, the second electronic component 23, the third electronic component 24 and the fourth electronic component 25 are all arranged on the same side of the circuit board 21 close to the end portion 115.

In this embodiment, the first electronic component 22 is a front lens module. The first electronic component 22 is disposed on the edge of the circuit board 21 adjacent to the second radiating portion F2, and is insulated from the second radiating portion F2 by the slot 118. The second electronic component 23 is a microphone, which is arranged on the circuit board 21 and spaced apart from the first electronic component 22. The third electronic component 24 is a receiver, which is disposed on the circuit board 21 and located on a side of the first electronic component 22 close to the first break point 120. In this embodiment, the second electronic component 23 and the third electronic component 24 are also spaced and insulated from the second radiating portion F2 by the slot 118. The fourth electronic component 25 is a voice interface. The fourth electronic component 25 is disposed on the circuit board 21, which is located on a side of the third electronic component 24 away from the first electronic component 22 and is disposed corresponding to the first break point 120.

It can be understood that, in this embodiment, the metal frame 111 is also provided with a port (not shown). The port is opened on the end portion 115 and penetrates the end portion 115. The port corresponds to the fourth electronic component 25 so that the fourth electronic component 25 is partially exposed from the port. In this way, the user can plug in an external device, such as a headset, through the port, and then communicate with all The fourth electronic component 25 establishes an electrical connection.

It can be understood that, in this embodiment, the first feeding portion 12 is disposed in the metal shell 11. One end of the first feeding portion 12 can be electrically connected to the first radiating section F11 by means of shrapnel, microstrip line, strip line, coaxial cable, etc., and the other end is electrically connected to the first radiating section F11 by a matching circuit 124. The first feeding point 211 is used to feed a current signal to the first radiating section F11 of the first radiating portion F1.

The second feeding portion 13 is disposed in the metal shell 11. One end of the second feeding portion 13 can be electrically connected to the second radiating section F12 by means of a shrapnel, microstrip line, strip line, coaxial cable, etc., and the other end is electrically connected to the second radiating section F12 by a matching circuit 131. The second feeding point 212 is used to feed a current signal to the second radiating section F12 of the first radiating portion F1.

The third feeding portion 14 is disposed in the metal shell 11. One end of the third feeding portion 14 can be electrically connected to one end of the second radiating portion F2 near the third break point 122 by means of elastic sheets, microstrip lines, strip lines, coaxial cables, and the other end by A matching circuit 141 is electrically connected to the third feeding point 213 for feeding a current signal to the second radiating part F2.

It can be understood that, in this embodiment, the first feeding portion 12, the second feeding portion 13, and the third feeding portion 14 can be made of iron, metal copper foil, or laser direct structuring (LDS) manufacturing process. Made of materials such as conductors.

In this embodiment, the first grounding portion 15 is disposed in the metal shell 11 and located between the third electronic component 24 and the fourth electronic component 25. One end of the first ground portion 15 is electrically connected to the second radiating portion F2, and the other end is electrically connected to the first ground point 214 through a matching circuit 151, thereby providing a ground for the second radiating portion F2.

It can be understood that, in this embodiment, the matching circuits 124, 131, 141, and 151 It can be an L-shaped matching circuit, a T-shaped matching circuit, a π-shaped matching circuit, or other capacitors, inductors, and combinations of capacitors and inductors to adjust the corresponding radiating part or radiating section, such as the first radiating section F11 and the second radiating section The impedance of the segment F12 and the second radiating part F2 are matched.

The second ground portion 17 is disposed in the metal shell 11 and located between the third feeding portion 14 and the second side portion 117. One end of the second ground portion 17 is electrically connected to an end of the second radiating portion F2 close to the third break point 122, and the other end is electrically connected to the second ground point 215 through the switching circuit 18, thereby A ground is provided for the second radiating part F2.

Please also refer to FIG. 4, which is a current path diagram of the antenna structure 100. After the first feeding portion 12 feeds current, the current flows through the first radiation section F11 of the first radiation portion F1, and flows to the first break point 120 (see path P1), thereby exciting a The first working mode generates a radiation signal in the first radiation frequency band.

When the second feeding portion 13 feeds current, the current will flow through the second radiating section F12 and the first radiating section F11 of the first radiating section F1 in sequence, and then flow to the first break point 120 ( Refer to path P2), and then excite a second working mode to generate a radiation signal in the second radiation frequency band.

When the third feeding portion 14 feeds current, the current will flow through the second radiating portion F2 and flow to the first break point 120, and then through the first ground portion 15 and the The matching circuit 151 is grounded (refer to path P3), thereby exciting a third operating mode to generate a radiation signal in the third radiation frequency band. In addition, current will flow into the first ground portion 15 through the first ground point 214, then flow through the second radiating portion F2, and flow to the third break point 122 (see path P4), and then A fourth working mode is excited to generate a radiation signal of the fourth radiation frequency band.

In this embodiment, the first working mode includes the Global Positioning System (GPS) mode and the WIFI 2.4 GHz mode. The second working mode is a WIFI 5GHz mode. The third working mode includes a Long Term Evolution Advanced (LTE-A) intermediate frequency mode and a high frequency mode. The fourth working mode is an LTE-A low frequency mode. The frequencies of the first radiation band include 1575MHz and 2400-2484MHz. The frequency of the second radiation band is 5100-5900MHz. The frequencies of the third radiation band include 1710-2170MHz and 2300-2690MHz. The frequency of the fourth radiation frequency band is 700-960MHz.

Please also refer to FIG. 5. In this 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 three-throw switch, a single-pole four-throw switch, a single-pole six-throw switch, a single-pole eight-throw switch, and the like. The switching unit 181 is electrically connected to the second radiation part F2. 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 with each other, and one end is electrically connected to the switching unit 181, and the other end is electrically connected to the second ground point 215, that is, grounded. In this way, by controlling the switching of the switching unit 181, the second radiating portion F2 can be switched to a different switching element 183 to adjust the frequency of the fourth radiating frequency band, that is, the low frequency band.

FIG. 6 is a graph of S parameters (scattering parameters) when the antenna structure 100 works in the LTE-A low frequency mode. Wherein, the curve S61 is the S11 value when the antenna structure 100 operates in the LTE-A Band17 frequency band (704-746 MHz). The curve S62 is the S11 value of the antenna structure 100 operating in the LTE-A Band 13 frequency band (746-787 MHz). The curve S63 is the S11 value when the antenna structure 100 works in the LTE-A Band5 frequency band (869-894 MHz). curve S64 is the S11 value when the antenna structure 100 operates in the LTE-A Band 8 frequency band (880-960 MHz).

FIG. 7 is a graph of radiation efficiency when the antenna structure 100 works in the LTE-A low-frequency mode. Wherein, the curve S71 is the radiation efficiency when the antenna structure 100 works in the LTE-A Band 17 frequency band (704-746 MHz). Curve S72 is the radiation efficiency of the antenna structure 100 operating in the LTE-A Band 13 frequency band (746-787 MHz). The curve S73 is the radiation efficiency when the antenna structure 100 operates in the LTE-A Band5 frequency band (869-894 MHz). The curve S74 is the radiation efficiency when the antenna structure 100 works in the LTE-A Band 8 frequency band (880-960 MHz).

FIG. 8 is a graph of S parameters (scattering parameters) when the antenna structure 100 works in LTE-A medium and high frequency modes. Wherein, the curve S81 indicates that when the low frequency of the antenna structure 100 is in the LTE-A Band 17 frequency band (704-746 MHz), the antenna structure 100 works in the S11 value of the LTE-A middle and high frequency bands. The curve S82 shows the S11 value of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band 13 frequency band (746-787 MHz). The curve S83 is the S11 value of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band5 frequency band (869-894 MHz), and the antenna structure 100 works in the LTE-A mid- and high-frequency band. The curve S84 is the S11 value of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band 8 frequency band (880-960 MHz), and the antenna structure 100 works in the LTE-A medium and high frequency bands.

FIG. 9 is a graph showing the radiation efficiency of the antenna structure 100 when operating in the LTE-A medium and high frequency modes. Wherein, the curve S91 is the radiation efficiency of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band 17 frequency band (704-746 MHz), when the antenna structure 100 works in the LTE-A medium and high frequency bands. Curve S92 shows the radiation effect of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band 13 frequency band (746-787 MHz), when the antenna structure 100 works in the LTE-A medium and high frequency bands rate. The curve S93 is the radiation efficiency of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band 5 frequency band (869-894 MHz), and the antenna structure 100 works in the LTE-A medium and high frequency bands. Curve S94 shows the radiation efficiency of the antenna structure 100 when the low frequency of the antenna structure 100 is in the LTE-A Band 8 frequency band (880-960 MHz), when the antenna structure 100 operates in the LTE-A mid- and high-frequency band.

FIG. 10 is a graph of S parameters (scattering parameters) when the antenna structure 100 works in the GPS mode and the WIFI 2.4 GHz mode. FIG. 11 is a graph of radiation efficiency when the antenna structure 100 works in the GPS mode and the WIFI 2.4 GHz mode.

FIG. 12 is a graph of S parameter (scattering parameter) when the antenna structure 100 works in the WIFI 5GHz mode. FIG. 13 is a graph showing the radiation efficiency of the antenna structure 100 when operating in the WIFI 5GHz mode.

Obviously, it can be seen from FIGS. 6 to 13 that the antenna structure 100 is provided with the switching circuit 18 to switch the low frequency modes of the antenna structure 100, which can effectively increase the low frequency bandwidth and have the best performance. Antenna efficiency. Furthermore, when the antenna structure 100 works in the LTE-A Band17 frequency band (704-746MHz), the LTE-A Band13 frequency band (746-787MHz), the LTE-A Band5 frequency band (869-894MHz) and the LTE-A Band8 frequency band respectively (880-960MHz), the LTE-A middle and high frequency bands of the antenna structure 100 are both 1710-2690MHz, and the antenna structure 100 can also cover the corresponding GPS frequency band, WIFI 2.4GHz frequency band and WIFI 5GHz Frequency band. That is, when the switching circuit 18 switches, the switching circuit 18 is only used to change the low-frequency mode of the antenna structure 100 without affecting the middle and high-frequency modes. This feature is beneficial to the carrier aggregation application of LTE-A (Carrier Aggregation). , CA).

In other words, the antenna structure 100 can generate various operating modes, such as low-frequency mode, intermediate-frequency mode, high-frequency mode, GPS Mode, WIFI 2.4GHz mode and WIFI 5GHz mode, covering the communication frequency bands commonly used in the world. Specifically, the antenna structure 100 can cover GSM850/900/WCDMA Band5/Band8/Band13/Band17 at low frequency, GSM 1800/1900/WCDMA 2100 (1710-2170MHz) at intermediate frequency, and LTE-A Band7 at high frequency. , Band40, Band41 (2300-2690MHz), it can also cover GPS frequency band, Wi-Fi 2.4GHz frequency band and Wi-Fi 5GHz frequency band. The designed frequency band of the antenna structure 100 can be applied to the operation of GSM Qual-band, UMTS Band I/II/V/VIII frequency bands, and LTE 850/900/1800/1900/2100/2300/2500 frequency bands commonly used in the world.

In summary, the antenna structure 100 of the present invention has at least one break point (for example, the first break point 120, the second break point 121, and the third break point 122) provided on the metal frame 111, so as to separate from the metal frame 111. At least two radiating parts are divided on the upper part. The antenna structure 100 is also provided with the switching circuit 18, so that the antenna structure 100 can cover multiple frequency bands such as low frequency, intermediate frequency, high frequency, GPS, Wi-Fi 2.4GHz and Wi-Fi 5GHz, and As a result, the radiation of the antenna structure 100 has a wider frequency effect than that of a general metal back cover antenna. The antenna structure 100 can increase the low frequency bandwidth and have better antenna efficiency, covering the requirements of global frequency band applications and supporting carrier aggregation (CA) applications. In addition, it is understandable that the antenna structure 100 of the present invention has a front full screen, and the antenna structure 100 still has a good performance in an unfavorable environment where the metal back plate 113, the metal frame 111, and a large amount of metal surround it.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should all be included in the scope of protection claimed by the present invention.

100: Antenna structure

120: The first breakpoint

121: second breakpoint

122: third breakpoint

F1: The first radiation department

F11: The first radiation section

F12: second radiation section

F2: The second radiating part

12: The first feed-in part

13: The second feed-in part

14: The third feed-in part

15: The first grounding part

17: The second ground part

18: Switching circuit

124, 131, 141, 151: matching circuit

21: circuit board

210: Clearance area

211: The first feed point

212: second feed point

213: third feed point

214: first ground point

215: second ground point

22: The first electronic component

23: The second electronic component

24: The third electronic component

25: The fourth electronic component

Claims (10)

An antenna structure applied to a wireless communication device with a full screen. The improvement is that the antenna structure includes a metal shell, a first feeding portion, a second feeding portion, a first grounding portion, and a second grounding portion. The housing includes a metal frame and a metal back plate. The metal frame is arranged around the edge of the metal back plate. The metal frame is provided with a slot, a first break point, a second break point, and a third break point. The first breaking point and the third breaking point are both connected to the slot, and the metal frame between the first breaking point and one of the end points of the slot forms a first radiating part, The metal frame between the first break point and the third break point forms a second radiating portion, and the second break point is opened on the metal frame and is located between the first break point and the Between one of the end points of the slot, the second break point extends in a direction close to the metal back plate, and is not connected to the slot, thereby dividing the first radiating portion into a first radiating Section and a second radiating section, and the first radiating section is connected to the second radiating section, and the first feeding portion is electrically connected to the first radiating section to feed a current signal to the first radiating section , So that the first radiating section works in GPS mode and WIFI 2.4GHz mode, and the second feeding part is electrically connected to the second radiating section to feed a current signal to the second radiating section, and then The second radiating section is operated in a WIFI 5GHz mode, one end of the first grounding portion and the second grounding portion are both electrically connected to the second radiating portion, and the other ends are both grounded. The antenna structure according to claim 1, wherein the metal frame includes at least an end portion, a first side portion, and a second side portion, and the first side portion and the second side portion are respectively connected to one of the end portions At both ends, the slot is opened in the end portion and extends in the direction of the first side portion and the second side portion respectively, and the first breaking point is opened in the end portion and is close to the first side portion. The side part is arranged, and the second breaking point is opened on the first side part and close to the end part. The antenna structure according to claim 2, wherein the third breaking point is opened at a position of the second side part close to the end part. The antenna structure according to claim 1, wherein the antenna structure further includes a third feeding portion, and the third feeding portion is electrically connected to the second radiating portion to feed a current signal to the second radiating portion. The antenna structure according to claim 4, wherein when the first feeding part feeds a current, the current flows through the first radiating section, and flows to the first break point, thereby exciting the GPS Modal and WIFI 2.4GHz modal; when the second feeding part feeds current, the current flows through the second radiating section and the first radiating section in sequence, and flows to the first breaking point, Then the WIFI 5GHz mode is excited; when the third feeding part feeds current, the current flows through the second radiation part, and flows to the first breaking point, and then through the first The grounding part is grounded to excite an LTE-A intermediate frequency and high-frequency mode; at the same time, the current will flow into the second radiating part through the first grounding part, and then flow to the third breaking point to An LTE-A low frequency mode is excited. The antenna structure according to claim 5, wherein the antenna structure further includes a switching circuit, one end of the switching circuit is electrically connected to the second ground portion, and the other end is grounded to adjust the LTE-A low frequency mode The frequency of the state. The antenna structure according to claim 6, wherein the slot is opened on the metal frame at a position close to the metal back plate and extends toward the direction of the full screen, and the slot has a width of the Half the width of the metal frame. The antenna structure according to claim 2, wherein the antenna structure further includes a metal middle frame, the metal middle frame is disposed in the metal casing, and a notch is provided at a position adjacent to the end portion of the metal middle frame, The gap and the slot communicate with each other. The antenna structure according to claim 8, wherein the wireless communication device further includes a circuit board disposed in a space enclosed by the metal frame, the metal back plate, and the metal middle frame, and the circuit board One end is spaced apart from the metal frame, and then shaped between the two Into the corresponding clearance area. A wireless communication device, which includes the antenna structure according to any one of claims 1-9.

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