TW201806243A - Antenna structure and wireless communication device using same - Google Patents

Abstract

The present invention provides an antenna structure includes a metallic member, a first feed portion, a first matching circuit, and a second matching circuit. The metallic member includes a front frame and a side frame. The side frame defines a slot. The front frame defines a first gap and a second gap communicating with the slot and extending across the front frame. A portion of the front frame between the first gap and the second gap forms a first radiating section. One end of the first feed portion electrically connects to the first radiating section, the other end connects to a first feed source and a second feed source through an extractor of the first matching circuit; an end of the first radiating section adjacent to the second gap connects to a ground through an third inductance and an third capacity of the second matching circuit. A wireless communication device using the antenna structure is also provided.

Description

Antenna structure and wireless communication device having the same

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

With the advancement of wireless communication technology, wireless communication devices are constantly moving toward a thin and light trend, and consumers are increasingly demanding the appearance of products. Since the metal casing has advantages in appearance, mechanism strength, heat dissipation effect, etc., more and more manufacturers have designed wireless communication devices with metal casings, such as metal back plates, to meet the needs of consumers. However, the metal casing easily interferes with the signal radiated by the antenna disposed therein, and the broadband design is not easily achieved, resulting in poor radiation performance of the built-in antenna. Moreover, the metal back plate is usually provided with a slot and a break point, which will affect the integrity and aesthetics of the metal back plate.

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

An antenna structure includes a metal member, a first matching portion first matching circuit and a second matching circuit. The metal member includes a metal front frame, a metal back plate and a metal frame, and the metal frame is sandwiched between the metal front frame and the metal back plate. a slot is formed in the metal frame, and a first break point and a second break point are formed on the metal front frame, and the first break point and the second break point are respectively disposed near the two ends of the slot, the first break point and the first a second break point is connected to the slot and extends to block the metal front frame, and a metal front frame between the first break point and the second break point forms a first radiating section, and the first matching circuit includes an extractor, One end of the feeding portion is electrically connected to the first radiating portion, and the other end is connected to the first feeding source and the second feeding source through an extractor. The second matching circuit includes a third inductor and a third capacitor, and the first radiating portion is adjacent to the first radiating portion. One end of the two breakpoints is connected to ground through a third inductor and a third capacitor.

The antenna structure is configured by the metal member, and the slot and the break point on the metal member are disposed on the metal front frame and the metal frame, and are not disposed on the metal back plate, so that the The metal back plate constitutes an all-metal structure, that is, the metal back plate has no insulating slots, broken lines or break points, so that the metal back plate can avoid affecting the metal due to the setting of the slot, the broken line or the break point. The integrity and aesthetics of the back panel.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the 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 on the other element or the element can be present. When an element is considered to be "electrically connected" to another element, it can be a contact connection, for example, either a wire connection or a non-contact connection, for example, a non-contact coupling.

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, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict.

Example 1

Referring to FIG. 1, a first preferred embodiment of the present invention provides an antenna structure 100 that can be applied to a wireless communication device 200 such as a mobile phone or a personal digital assistant to transmit and receive radio waves to transmit and exchange wireless signals.

Referring to FIG. 1 and FIG. 2 , the antenna structure 100 includes a metal member 11 , a first feeding portion 12 , a first ground portion 13 , a first radiator 14 , a second feeding portion 15 , and a second ground portion 16 . The second radiator 17, the third feeding portion 18, the third ground portion 19, the first matching circuit 27 (refer to FIG. 5) and the second matching circuit 28 (refer to FIG. 6).

The metal member 11 may be an outer casing of the wireless communication device 200. The metal member 11 includes a metal front frame 111, a metal back plate 112, and a metal frame 113. The metal front frame 111, the metal back plate 112, and the metal frame 113 may be integrally formed. The metal front frame 111, the metal back plate 112, and the metal frame 113 constitute an outer casing of the wireless communication device 200. An opening (not shown) is disposed on the metal front frame 111 for receiving the display unit 201 of the wireless communication device 200. It can be understood that the display unit 201 has a display plane exposed to the opening, and the display plane is disposed substantially parallel to the metal back plate 112.

The metal back plate 112 is disposed opposite to the metal front frame 111. The metal back plate 112 is directly connected to the metal frame 113. There is no gap between the metal back plate 112 and the metal frame 113. The metal back plate 112 is an integrally formed single metal piece. The metal back plate 112 is provided with openings 204 and 205 for exposing components such as the rear double lens 202 and the receiver 203. The metal back plate 112 is not disposed. Any slot, break or breakpoint used to separate the insulation of the metal backing plate 112 (see Figure 2). The metal backing plate 112 can serve as the ground of the antenna structure 100.

Referring to FIG. 3 , the metal frame 113 is interposed between the metal front frame 111 and the metal back plate 112 , and is disposed around the circumference of the metal front frame 111 and the metal back plate 112 respectively. And the display unit 201, the metal front frame 111 and the metal back plate 112 together form an accommodating space 114. The accommodating space 114 is configured to receive an electronic component or a circuit module of the circuit board 210, the processing unit, and the like of the wireless communication device 200. In this embodiment, the electronic component includes at least the rear dual lens 202, the receiver 203, and the front lens 207. The rear dual lens 202, the receiver 203, and the front lens 207 are arranged side by side and spaced apart. The circuit board 210 of the wireless communication device 200. The rear double lens 202, the receiver 203, and the front lens 207 are adjacent to the metal frame 113.

The metal frame 113 includes at least a top portion 115, a first side portion 116, and a second side portion 117. The top portion 115 connects the metal front frame 111 and the metal back plate 112. The first side portion 116 is disposed opposite to the second side portion 117 , and is disposed at two ends of the top portion 115 , preferably perpendicularly disposed at two ends of the top portion 115 . The first side portion 116 and the second side portion 117 are also connected to the metal front frame 111 and the metal back plate 112. A slot 118 is also defined in the metal frame 113. In this embodiment, the slots 118 are disposed on the top portion 115 and extend to the first side portion 116 and the second side portion 117, respectively. It can be understood that in other embodiments, the slot 118 may also be disposed only on the top portion 115 without extending to any one of the first side portion 116 and the second side portion 117, or the opening A slot 118 is disposed in the top portion 115 and extends only along one of the first side portion 116 and the second side portion 117.

The top edge of the metal front frame 111 is spaced apart from the first break point 1112 and the second break point 1114. A third break point 1116 and a fourth break point 1118 are respectively disposed on the two sides. The third break point 1116 and the fourth break point 1118 are respectively located at opposite ends of the slot 118. The break points 1112, 1114, 1116, 1118 are in communication with the slot 118 and extend to block the metal front frame 111. The four break points are divided into three parts from the metal front frame 111, and the three parts include at least a first radiating section 22, a second radiating section 24, and a third radiating section 26. In this embodiment, the first break point 1112 and the second break point 1114 are respectively disposed at opposite ends of the top edge of the metal front frame 111 near the corner, and the first radiant section 22 is located at the first break point 1112 and the first Between the two break points 1114; the second radiant section 24 is located between the first break point 1112 and the third break point 1116, and the second radiant section 24 extends from the top edge of the metal front frame 111 to the side and extends through a circular arc corner of the metal front frame 111; the third radiating section 26 is located between the second break point 1114 and the fourth break point 1118, and the third radiating section 26 extends from the top edge of the metal front frame 111 to another One side edge and another arc-shaped corner extending through the metal front frame 111. In addition, the slot 118 and the break points 1112, 1114, 1116, and 1118 are filled with an insulating material (for example, plastic, rubber, glass, wood, ceramics, etc., but not limited thereto), and further, the partition The first radiating section 22, the second radiating section 24, the third radiating section 26 and the remaining portion of the metal member 11 are described.

It can be understood that the upper half of the metal front frame 111 is not provided with other insulating slots, broken lines or break points except the break point, so the upper half of the metal front frame 111 has only four break points. 1112, 1114, 1116, 1118, there are no other breakpoints.

One end of the first feeding portion 12 is connected to one end of the first radiating portion 22 which is closer to the second breaking point 1114 , and the other end of the first feeding portion 12 is electrically connected to the feeding through the first matching circuit 27 . The source, such that the first feed 12 supplies a current to the first radiant section 22. In this embodiment, after the current is fed from the first feeding portion 12, the current is transmitted to the first breaking point 1112 and the second breaking point 1114 in the first radiating section 22, respectively, so that the first radiating section 22 is The first feeding portion 12 is divided into a metal long arm A1 facing the first breaking point 1112 and a metal short arm A2 facing the second breaking point 1114. One end of the first grounding portion 13 is connected to one end of the first radiating section 22 which is closer to the first breaking point 1112, and the other end is connected to the grounding surface through a fifth inductor L5 (refer to FIG. 4), that is, grounded. Each of the first feeding portion 12 and the first ground portion 13 is substantially an L-shaped metal sheet body. In this embodiment, the position at which the first feeding portion 12 is inserted does not correspond to the middle of the first radiating portion 22, so the length of the metal long arm A1 is greater than the length of the metal short arm A2.

Referring to FIG. 5 , the first matching circuit 27 is disposed on the circuit board 210 . One end of the first matching circuit 27 is electrically connected to the first feeding portion 12 , and the other end is connected to a first feeding source 271 and a second feeding source 272 . The first matching circuit 27 includes an extractor 273, a first inductor L1, a first capacitor C1, a second inductor L12, and a second capacitor C12. The first feeding portion 12 is connected to the ground plane through the first inductor L1. One end of the extractor 273 is electrically connected to the first feeding portion 12 and the first inductor L1 through the first capacitor C1, and the other end is connected to the ground plane through the second inductor L12 and the second capacitor C12 in sequence. The first feed source 271 is electrically connected between the extractor 273 and the second inductor L12, and the second feed source 272 is electrically connected between the second inductor L12 and the second capacitor C12. . In this embodiment, the first feed source 271 is a diversity feed source, and the second feed source 272 is a GPS feed source. The metal long arm A1, the first feeding portion 12, the first matching circuit 27 and the first ground portion 13 excite a first mode to generate a radiation signal of the first frequency band. In this embodiment, the first mode is an LTE-A high frequency mode, and the first frequency band is a frequency band of 2300-2690 MHz.

The first radiator 14 is connected to the metal short arm A2 and the third radiation segment 26. The first radiator 14 includes a first arm 142, a second arm 144, and a third arm 146 that are sequentially connected. The first arm 142 is substantially a U-shaped metal sheet that spans the second break point 1114 and is connected to the metal short arm A2 and the third radiating portion 26 respectively at the second break point 1114. On both sides. The second arm 144 is substantially a rectangular metal sheet body having one end connected to the first arm 142 and extending toward the third radiating section 26. The third arm 146 is substantially an L-shaped metal sheet body having one end connected to the second arm 144 and the other end connected to the third radiating section 26.

Referring to FIG. 6 , the second matching circuit 28 is disposed on the circuit board 210 . One end of the second matching circuit 28 is electrically connected to the first arm 142 of the first radiator 14 and the other end is connected to the ground plane. The second matching circuit 28 includes a third inductor L3, a third capacitor C3, a switch S, and a plurality of fourth inductors L41, L42, . . . L48. One end of the third inductor L3 is electrically connected to the first arm 142, and the other end is connected to the ground plane through the third capacitor C3. One end of the switch S is electrically connected between the third inductor L3 and the third capacitor C3, and the other end is selectively electrically connected to one end of one of the plurality of fourth inductors L41, L42, . The other ends of the fourth inductors L41, L42, ..., L48 are all connected to a ground plane. The first matching circuit 27, the first feeding portion 12, the metal short arm A2, the first arm 142 of the first radiator 14, and the third inductor L3 and the third capacitor C3 of the second matching circuit 28 excite a second mode a state to generate a radiation signal of the second frequency band; a third inductance of the first matching circuit 27, the first feeding portion 12, the metal short arm A2, the third radiation segment 26, the first radiator 14, and the second matching circuit 28. One of L3 and the fourth inductor L41, L42...L48 of the switched connection excites a third mode to generate a radiation signal of the third frequency band. In this embodiment, the second mode is an LTE-A intermediate frequency mode and a GPS mode, the second frequency band is a 1805-2170 MHz frequency band, and the third mode is an LTE-A low frequency mode. The third frequency band is the 704-960MHz frequency band. By controlling the switching of the switching switch S, the metal short arm A2, the third radiating section 26 and the first radiator 14 can be switched to different fourth inductors L41, L42...L48. Since each of the fourth inductors L41, L42, . . . L48 has a different impedance, the frequency band of the third mode can be adjusted by the switching of the switch S. The adjustment of the frequency band is to shift the frequency band to a low frequency or to a high frequency. Therefore, the first matching circuit 27, the first feeding portion 12, the metal short arm A2, the first arm 142 and the third inductor L3, and the third capacitor C3 of the first radiator 14 are fed from the diversity feeding source 271 and the GPS. The source 272 feed current integrates the functions of the diversity antenna and the GPS antenna.

The second feeding portion 15 and the second ground portion 16 are both substantially L-shaped metal sheets, and the two are connected side by side to the end of the second radiating portion 24 near the first breaking point 1112. The second feeding portion 15 is electrically connected between a WiFi 2.4G feed source and the second radiating portion 24 . The second grounding portion 16 is electrically connected between the second radiating section 24 and the ground plane. The second feeding portion 15, the second radiating portion 24 and the second ground portion 16 excite a fourth mode to generate a radiation signal of the fourth frequency band. In this embodiment, the fourth mode is a WiFi 2.4G mode, and the fourth frequency band is a 2400-2500 MHz band.

The second radiator 17 is substantially an L-shaped metal sheet. Each of the third feeding portion 18 and the third ground portion 19 is substantially an L-shaped metal sheet body, and the two are vertically connected to one end of the second radiator 17 at intervals. The second radiator 17 is disposed in a space surrounded by the receiver 203, the front lens 207, and the metal long arm A1. The third feeding portion 18 is electrically connected between a WiFi 5G feed source and the second radiator 17 . The third feeding portion 18, the second radiator 17 and the third ground portion 19 excite a fifth mode to generate a radiation signal of the fifth frequency band. In this embodiment, the fifth mode is a WiFi 5G mode, and the fifth frequency band is a 5150-5825 MHz band.

The ground plane may be the metal backing plate 112. Alternatively, a shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 201 may be disposed on a side of the display unit 201 facing the metal back plate 112. The mask or the middle frame is made of a metal material. The ground plane may also be the mask or the middle frame. Alternatively, the metal backing plate 112 can be attached to the mask or middle frame to form a larger ground plane. The ground plane is the ground of the antenna structure 100. That is to say, each of the grounding portions and the grounding point are directly connected or indirectly connected to the grounding surface. Each of the feedthroughs is directly or indirectly connected to a feed source on the circuit board 210.

In this embodiment, in order to obtain better antenna characteristics, the thickness of the wireless communication device 200 can be set to 7.43 mm. The width of the slot 118 can be set to be 3-4.5 mm. Preferably, the width of the slot 118 can be set to 3.5 mm, that is, the first radiating section 22, the second radiating section 24 and the third radiating section 26 are disposed at a distance of 3.5 mm from the metal back plate 112, so that the first The radiant section 22, the second radiant section 24, and the third radiant section 26 are remote from the metal backing plate 112 to enhance the antenna efficiency of the radiant section. The width of the break points 1112, 1114, 1116, 1118 can be set to 1.5-2.5 mm. Preferably, the width of the breakpoints 1112, 1114, 1116, 1118 is set to 2 millimeters to further enhance the antenna efficiency of the radiating segments without affecting the overall appearance of the antenna structure 100.

In this embodiment, the second radiators 17 are spaced apart from the front lens 207 between the receivers 203. The first ground portion 13 is spaced apart from one side of the front lens 207 . The first feeding portion 12 is spaced between the rear double lens 202 and the receiver 203 . The first radiator 14 is spaced apart from a side of the rear double lens 202 away from the first feeding portion 12 .

FIG. 4 is a schematic diagram of current flow when the antenna structure 100 is in operation. When the current enters the first radiating section 22 from the first feeding portion 12, respectively flows in two directions, one of which flows through the metal long arm A1 and flows to the first breaking point 1112 ( Referring to path P1), current path P1 excites the LTE-A high frequency mode. After the current enters the first radiating section 22 from the first feeding portion 12, the other direction flows through the metal short arm A2, flows to the second breaking point 1114, and flows to the first radiator 14 The first arm 142 and the third inductance L3 and the third capacitance C3 of the second matching circuit 28 (refer to the path P2), the current path P2 excites the LTE-A intermediate frequency mode and the GPS mode. After the current enters the first radiant section 22 from the first feeding portion 12, the other direction flows through the metal short arm A2, and flows through the first radiator 14 and the third radiant section 26, and flows to the The third break point 1116, while the current also flows to the third inductor L3 of the second matching circuit 28, the switch S and one of the plurality of fourth capacitors L41, L42...L48 (refer to the path P3), and the current path P3 is excited. The LTE-A low frequency mode. After the current enters the second radiating section 24 from the second feeding portion 15, it flows through the second radiating section 24 and the second grounding portion 16 and flows to the third breaking point 1116 (refer to the path P4). The WiFi 2.4G modality is then activated. When the current enters the second radiator 17 and the third ground portion 19 from the third feeding portion 18 (refer to the path P5), the WiFi 5G mode is excited.

FIG. 7 is a graph showing return loss of the first radiating section 22, the third radiating section 26 and the first radiator 14 of the antenna structure 100 during operation. Wherein, the curve 71 part generates the LTE-A low frequency band, the curve 72 part generates the LTE-A intermediate frequency 1800 frequency band and the curve 73 part generates the LTE-A high frequency 2500 frequency band.

8 is a graph of GPS return loss (Length Loss) when the first radiating section 22, the third radiating section 26, the first radiator 14, and the extractor 273 of the antenna structure 100 are operated. The antenna structure 100 has an effect of achieving a GPS return loss of 15 dB or more through the extractor 273 of the first matching circuit 27.

FIG. 9 is a graph of return loss (Return Loss) when the second radiating section 24 of the antenna structure 100 is in operation. Wherein, the curve S91 is a return loss value when the second radiating section 24 operates in the WiFi 2.4G frequency band (2400-2484 MHz).

FIG. 10 is a graph of return loss (Return Loss) when the second radiator 17 of the antenna structure 100 is in operation. The curve S101 is a return loss value when the second radiator 17 operates in the WiFi 5G frequency band (5150-5850 MHz).

FIG. 11 is a graph showing the efficiency of the first radiating section 22, the third radiating section 26 and the first radiator 14 of the antenna structure 100 during operation. Among them, the broken line is the radiation efficiency, and the solid line is the total radiation efficiency. LET-A low frequency can maintain -7 decibel to -5 decibel efficiency, LET-A intermediate frequency and high frequency can reach -6 decibel to -2.5 decibel efficiency.

FIG. 12 is a graph showing the efficiency of the second radiating section 24 of the antenna structure 100 during operation. Among them, the broken line is the radiation efficiency, and the solid line is the total radiation efficiency. The WiFi 2.4G band can maintain efficiencies above -3 dB.

FIG. 13 is a graph showing the efficiency of the second radiator 17 of the antenna structure 100 during operation. Among them, the broken line is the radiation efficiency, and the solid line is the total radiation efficiency. The WiFi 5G band can maintain efficiencies above -4 dB.

FIG. 14 is a graph of return loss (Sturn Loss) when the antenna structure 100 is switched to the different fourth inductors L41, L42, . . . L48 by the switch S. The curve S141 is a return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L41; the curve S142 is a return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L42; the curve S145 is a switch The return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L45 (not shown); the curve S148 is the return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L48.

Obviously, as can be seen from FIG. 7 to FIG. 14, the antenna structure 100 can operate in a corresponding low frequency band (704-960 MHz), an intermediate frequency band (1805-2170 MHz), and a high frequency band (2300-2690 MHz). In addition, the antenna structure 100 can also work in the GPS band (1575MHz), the WiFi 2.4G band (2400-2500MHz), and the WiFi 5G band (5150-5825MHz), which covers the LTE-A low, medium, high frequency, frequency. The range is wider, and when the antenna structure 100 operates in the above frequency band, its operating frequency can meet the antenna working design requirements and has better radiation efficiency.

The antenna structure 100 is disposed on the metal front frame 111 and the metal frame 113 by the metal member 11 and the metal frame 11 is not disposed on the metal back plate. 112, the metal backing plate 112 is configured to be an all-metal structure, that is, the metal backing plate 112 has no insulating slots, broken lines or break points, so that the metal backing plate 112 can be prevented from being slotted or broken. The arrangement of the lines or breakpoints affects the integrity and aesthetics of the metal backing 112.

Example 2

Referring to FIG. 15, a second preferred embodiment of the present invention provides an antenna structure 500 that can be applied to a wireless communication device 600 such as a mobile phone or a personal digital assistant to transmit and receive radio waves to transmit and exchange wireless signals.

Referring to FIG. 15 and FIG. 16 together, the antenna structure 500 includes a metal member 51, a feeding portion 52, a first ground portion 53, a radiator 54, a second ground portion 55, and a third ground portion 56 (refer to FIG. 18). The first matching circuit 57 (refer to FIG. 18) and the second matching circuit 58 (refer to FIG. 18).

The metal member 51 may be an outer casing of the wireless communication device 600. The metal member 51 includes a metal front frame 511, a metal back plate 512, and a metal frame 513. The metal front frame 511, the metal back plate 512, and the metal frame 513 may be integrally formed. The metal front frame 511, the metal back plate 512, and the metal frame 513 constitute an outer casing of the wireless communication device 600. An opening (not shown) is disposed on the metal front frame 511 for receiving the display unit 601 of the wireless communication device 600. It can be understood that the display unit 601 has a display plane exposed to the opening, and the display plane is disposed substantially parallel to the metal back plate 512.

Referring to FIG. 17 together, the metal back plate 512 is disposed opposite to the metal front frame 511. The metal back plate 512 is directly connected to the metal frame 513. There is no gap between the metal back plate 512 and the metal frame 513. The metal back plate 512 is an integrally formed single metal piece. The metal back plate 512 is provided with openings 604 and 605 for exposing components such as a rear double lens and a receiver. The metal back plate 512 is not provided with any use. The insulating slot, wire break or break point of the metal backing plate 512 is divided. The metal backing plate 512 can serve as the ground of the antenna structure 500.

The metal frame 513 is interposed between the metal front frame 511 and the metal back plate 512, and is disposed around the circumference of the metal front frame 511 and the metal back plate 512, respectively, to form with the display unit. 601. The metal front frame 511 and the metal back plate 512 together form an accommodating space 514. The accommodating space 514 is configured to receive an electronic component or a circuit module of the circuit board 610, the processing unit, and the like of the wireless communication device 600. In this embodiment, the electronic component includes at least the earphone socket 602, the USB connector 603, and the speaker 604. The earphone jack 602, the USB connector 603 and the speaker 604 are arranged side by side and spaced apart from the circuit board 610 of the wireless communication device 600. The earphone socket 602, the USB connector 603, and the speaker 604 are adjacent to the metal frame 513.

The metal frame 513 includes at least a bottom portion 515, a first side portion 516, and a second side portion 517. The bottom portion 515 connects the metal front frame 511 and the metal back plate 512. The first side portion 516 is disposed opposite to the second side portion 517 , and is disposed at two ends of the bottom portion 515 , preferably perpendicularly disposed at two ends of the bottom portion 515 . The first side portion 516 and the second side portion 517 are also connected to the metal front frame 511 and the metal back plate 512. A slot 518 is also defined in the metal frame 513. In the embodiment, the slots 518 are disposed on the bottom portion 515 and extend to the first side portion 516 and the second side portion 517, respectively. It can be understood that in other embodiments, the slot 518 can also be disposed only on the bottom portion 515 without extending to any one of the first side portion 516 and the second side portion 517, or the opening A slot 518 is disposed in the bottom portion 515 and extends only along one of the first side portion 516 and the second side portion 517.

The bottom edge of the metal front frame 511 is symmetrically opened with a first break point 5112 and a second break point 5114, and a third break point 5116 and a fourth break point 5118 are respectively formed on the two sides, and the third break point is 5116 and a fourth break point 5118 are respectively located at opposite ends of the slot 518. The break points 5112, 5114, 5116, 5118 are in communication with the slot 518 and extend to block the metal front frame 511. The four breakpoints are divided into three portions from the metal front frame 511, and the three portions include at least a first radiating section 62, a second radiating section 64, and a third radiating section 66. In this embodiment, the first break point 5112 and the second break point 5114 are respectively disposed at opposite ends of the bottom edge of the metal front frame 511 near the corner, and the first radiant section 62 is located at the first break point 5112 and the first Between the two breakpoints 5114; the second radiant section 64 is located between the first breakpoint 5112 and the third breakpoint 5116, and the second radiant section 64 extends from the top edge of the metal front frame 511 to the side and extends through a circular arc corner of the metal front frame 511; the third radiating section 66 is located between the second break point 5114 and the fourth break point 5118, and the third radiating section 66 extends from the top edge of the metal front frame 511 to another One side edge and another arc-shaped corner extending through the metal front frame 511. In addition, the slot 518 and the break points 5112, 5114, 5116, and 5118 are filled with an insulating material (for example, plastic, rubber, glass, wood, ceramics, etc., but not limited thereto), and further, the partition The first radiating section 62, the second radiating section 64, the third radiating section 66 and the remaining portion of the metal member 51 are described.

It can be understood that the lower half of the metal front frame 511 is not provided with other insulating slots, broken lines or break points except the break point, so the lower half of the metal front frame 511 has only four break points. 5112, 5114, 5116, 5118, no other breakpoints.

One end of the feeding portion 52 is electrically connected to the feeding source 68 through the first matching circuit 57 (please refer to FIG. 19), and the other end is connected to the first radiating portion 62, so that the feeding portion 52 is the first radiation. Segment 62 feeds current. In this embodiment, after the current is fed from the feeding portion 52, the current is transmitted to the first breaking point 5112 and the second breaking point 5114 in the first radiating portion 62, respectively, so that the first radiating portion 62 is fed by the feeding portion. 52 is a separation point divided into a metal long arm B1 facing the first break point 5112 and a metal short arm B2 facing the second break point 5114. In this embodiment, the position where the feeding portion 52 is inserted does not correspond to the middle of the first radiating portion 62, so the length of the metal long arm B1 is greater than the length of the metal short arm B2.

The first ground portion 53 is connected between the metal long arm B1 and the ground plane. The first ground portion 53 is located on a side of the first radiant section 62 near the first break point 5112. Both the feeding portion 52 and the first ground portion 53 are substantially L-shaped metal arms. The feeding portion 52 is disposed between the earphone socket 602 and the USB connector 603, and the first ground portion 53 is disposed adjacent to the speaker 604.

The first matching circuit 57 is disposed on the circuit board 610. Referring to FIG. 18 and FIG. 19, the first matching circuit 57 includes a first inductor L1 and a first capacitor C1. The feeding portion 52 is connected to the ground plane through the first inductor L1. The first capacitor C1 is electrically connected to the feed portion 52 and the first inductor L1 , and the other end is electrically connected to a feed source 68 . The first ground portion 53 is connected to the ground plane through a second inductor L2. The feeding portion 52, the first matching circuit 57, the metal long arm B1 and the first ground portion 53 excite a first mode to generate a radiation signal of the first frequency band. In this embodiment, the first mode is LTE. -A intermediate frequency mode, the first frequency band is the 1710-2170 MHz frequency band.

The radiator 54 connects the metal short arm B2 and the third radiant section 66. The radiator 54 includes a first arm 542, a second arm 544, and a third arm 546. The first arm 542 is substantially a U-shaped metal sheet that spans the second break point 5114 and is connected to the metal short arm B2 and the third radiating portion 66 respectively at the second break point 5114. On both sides. The second arm 544 is substantially an L-shaped metal sheet having one end connected to the first arm 542 and the other end connected to the third radiating section 66. The first arm 542 and the second arm 544 are located in the same plane and the plane is substantially parallel and spaced apart from the metal backing plate 512. The third arm 546 has one end substantially perpendicular to the first arm 542 and the other end electrically connected to the second matching circuit 58 on the circuit board 610.

The second matching circuit 58 is disposed on the circuit board 610. Referring to FIG. 20, the second matching circuit 58 includes a third inductor L3, a second capacitor C2, a switch S, and a plurality of fourth inductors L41, L42, L45, ..., L48. One end of the third inductor L3 is electrically connected to the third arm 546 of the radiator 54 , and the other end is connected to the ground plane through the second capacitor C2 . One end of the switch S is electrically connected between the third inductor L3 and the second capacitor C2, and the other end is selectively electrically connected to one of the plurality of fourth inductors L41, L42, L45, ... L48. One end. The other ends of the fourth inductors L41, L42, L45, ..., L48 are all connected to a ground plane.

The first matching circuit 57, the feeding portion 52, the metal short arm B2, the first arm 542 and the third arm 546, the third inductor L3 and the second capacitor C2 of the radiator 54 excite a second mode to generate a second a radiation signal of the frequency band; the first matching circuit 57, the feeding portion 52, the metal short arm B2, the third radiating portion 66, the radiator 54, and the third inductance L3 of the second matching circuit 28 and the fourth inductance of the switched connection One of L41, L42, L45...L48 excites a third mode to generate a radiation signal of the third frequency band. In this embodiment, the second mode is an LTE-A intermediate frequency mode, the second frequency band is a 1805-2170 MHz frequency band, and the third mode is an LTE-A low frequency mode, the third frequency band. It is the 704-960MHz band. By controlling the switching of the changeover switch S, the metal short arm B2, the third radiating section 66 and the radiator 54 can be switched to different fourth inductors L41, L42, L45, ... L48. Since each of the fourth inductors L41, L42, L45, . . . L48 has a different impedance, the frequency band of the third mode can be adjusted by the switching of the switch S. The adjustment of the frequency band is to shift the frequency band to a low frequency or to a high frequency.

The second ground portion 55 is substantially an L-shaped metal sheet body, and one end of the second ground portion 55 is connected to one end of the second radiating portion 64 near the first break point 5112. The other end of the second ground portion 55 is connected to the ground plane via a fifth inductor L5. One end of the third grounding portion 56 (refer to FIG. 18) is connected to one end of the second radiating section 64 near the third breaking point 5116. The other end of the third ground portion 56 is connected to a ground plane. The second radiating section 64, the second grounding portion 55 and the third grounding portion 56 are coupled to feed current from the first radiating section 62 to excite a fourth mode to generate a radiation signal of the fourth frequency band. In this embodiment, the fourth mode is an LTE-A high frequency mode, and the fourth frequency band is a 2300-2700 MHz frequency band.

In this embodiment, the ground plane may be the metal back plate 512. Alternatively, a shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 601 may be disposed on a side of the display unit 601 facing the metal back plate 512. Alternatively, the metal backing plate 512 can be attached to the mask or middle frame to form a larger ground plane. The mask or the middle frame is made of a metal material. The ground plane may also be the mask or the middle frame. The ground plane is the ground of the antenna structure 500. That is to say, each of the grounding portions and the grounding point are directly connected or indirectly connected to the grounding surface.

In this embodiment, in order to obtain better antenna characteristics, the thickness of the wireless communication device 600 can be set to 7.43 mm. The width of the slot 518 can be set to be 3-4.5 mm. Preferably, the width of the slot 518 can be set to 3.5 mm, that is, the first radiating section 62, the second radiating section 64 and the third radiating section 66 are disposed at a distance of 3.5 mm from the metal back plate 512, so that the first The radiant section 62, the second radiant section 64, and the third radiant section 66 are remote from the metal backing plate 512 to enhance the antenna efficiency of the radiant section. The width of the break points 5112, 5114, 5116, 5118 can be set to 1.5-2.5 mm. Preferably, the width of the breakpoints 5112, 5114, 5116, 5118 is set to 2 millimeters to further enhance the antenna efficiency of the radiating segments without affecting the overall appearance of the antenna structure 500.

In this embodiment, the feeding portion 52 and the radiator 54 are respectively disposed on opposite sides of the earphone socket 602. The feeding portion 52 is disposed between the earphone socket 602 and the USB connector 603. The first ground portion 53 and the second ground portion 55 are disposed on the same side of the speaker 604.

FIG. 18 is a schematic diagram of current flow when the antenna structure 500 is in operation. When the current enters the radiant section 62 from the feeding portion 52, respectively flows in two directions, one of which flows through the metal long arm B1 and flows to the first breaking point 5112 and the first grounding portion. 53 (refer to path P1), which in turn excites the LTE-A intermediate frequency mode (1710-2170 MHz). After the current enters the first radiating section 62 from the feeding portion 52, the other direction is the flow through the metal short arm B2, to the second breaking point 5114, and to the first radiator 54. The arm 542, the third arm 546, and the third inductor L3 and the second capacitor C2 of the second matching circuit 58 (refer to the path P2), and the current path P2 excites the LTE-A intermediate frequency mode (1805-2170) MHz). After the current enters the first radiating section 62 from the feeding portion 52, the other direction flows through the metal short arm B2, and flows through the first radiator 54 and the third radiating section 66 to the fourth Breaking point 5118, while current also flows to the third inductance L3 of the second matching circuit 28, the switch S and one of the plurality of fourth capacitors L41, L42...L48 (refer to the path P3), and the current path P3 excites the LTE-A low frequency mode (704-960 MHz). After the current enters the radiant section 62 from the feeding portion 52, the metal long arm B1 flows to the first breaking point 5112, and the current is coupled to the second radiant section 64, the second grounding portion 55, and the third. The grounding portion 56 flows to the third breaking point 5116 (refer to the path P4), and the current path P4 excites the LTE-A high frequency mode (2300-2700 MHz).

21 is a graph of return loss (Return Loss) when the antenna structure 500 is in operation. Wherein, the curve 211 part generates the LTE-A low frequency band, the curve 212 part generates the LTE-A intermediate frequency 1800 frequency band, the curve 213 part generates the LTE-A intermediate frequency 1700 frequency band and the 2100 frequency band, and the curve 214 part generates the LTE-A high frequency band. 2700 band.

FIG. 22 is a graph showing the efficiency of the antenna structure 500 during operation. Among them, the broken line is the radiation efficiency, and the solid line is the total radiation efficiency. LET-A low frequency can maintain efficiency from -5.5 decibels to -3 decibels, LET-A intermediate frequency and high frequency can reach -5 decibels to -2 decibels efficiency.

FIG. 23 is a graph of return loss (Sturn Loss) when the antenna structure 500 is switched to the different fourth inductors L41, L42, L45, . . . L48 by the switch S. The curve S231 is a return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L41; the curve S232 is a return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L42; the curve S235 is a switch The return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L45; the curve S238 is the return loss value of the antenna structure 100 when the switch S is connected to the fourth inductor L48. In the high frequency band, the curves S231, S232, S235 and S238 are substantially coincident, and the return loss value of the antenna structure 500 during operation is stable.

FIG. 24 is a return loss (Return Loss) graph when the second matching circuit 58 of the antenna structure 500 is combined with the second capacitor C2 of different capacitance values. The intermediate frequency band when the antenna structure 500 operates can be operated by using the second capacitor C2 with different capacitance values.

Obviously, the antenna structure 500 is applicable to an operating frequency range of LTE-A low frequency band (704-960 MHz), LTE-A intermediate frequency band (1710-2170 MHz), LTE-A intermediate frequency band (1805-2170 MHz), LTE. -A high frequency band (2300-2700MHz), wide frequency range, can be applied to operation of multiple frequency bands, and when the antenna structure 500 works in the above frequency band, its working frequency can meet the antenna working design requirements, and has Preferred radiation efficiency.

The antenna structure 500 is disposed on the metal front frame 511 and the metal frame 513 by the metal member 51, and the metal frame 51 is not disposed on the metal back plate. 512, the metal backing plate 512 is configured as an all-metal structure, that is, the metal backing plate 512 has no insulating slots, broken lines or break points, so that the metal backing plate 512 can avoid being slotted or broken. The arrangement of the lines or breakpoints affects the integrity and aesthetics of the metal backing plate 512.

It can be understood that the antenna structure 100 of Embodiment 1 of the present invention and the antenna structure 500 of Embodiment 2 are respectively an upper antenna and a lower antenna of the wireless communication device, and the upper antenna of Embodiment 1 can be combined with the lower antenna of Embodiment 2 to The antennas that form the wireless communication device are combined. The wireless communication device can transmit a wireless signal using the lower antenna and receive the wireless signal together using the upper antenna and the lower antenna.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. In addition, those skilled in the art can make other changes in the spirit of the present invention. Of course, the changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.

100‧‧‧Antenna structure
11‧‧‧Metal parts
111‧‧‧Metal front frame
112‧‧‧Metal backplane
113‧‧‧Metal border
114‧‧‧ accommodating space
115‧‧‧ top
116‧‧‧First side
117‧‧‧ second side
118‧‧‧ slotting
1112‧‧‧First breakpoint
1114‧‧‧second breakpoint
1116‧‧‧ third breakpoint
1118‧‧‧four breakpoint
22‧‧‧First radiant section
24‧‧‧second radiant section
26‧‧‧The third radiant section
A1‧‧‧Metal long arm
A2‧‧‧Metal short arm
12‧‧‧First Feeding Department
13‧‧‧First grounding
14‧‧‧First radiator
142‧‧‧First arm
144‧‧‧second arm
146‧‧‧ third arm
15‧‧‧Second Feeding Department
16‧‧‧Second grounding
17‧‧‧Second radiator
18‧‧‧ Third Feeding Department
19‧‧‧ Third grounding
27‧‧‧First matching circuit
271‧‧‧First feed source
272‧‧‧second feed source
273‧‧‧ extractor
L1‧‧‧first inductance
C1‧‧‧first capacitor
L12‧‧‧second inductance
C12‧‧‧second capacitor
28‧‧‧Second matching circuit
L3‧‧‧ third inductance
C3‧‧‧ third capacitor
S‧‧‧Toggle switch
L41, L42...L48‧‧‧ fourth inductor
L5‧‧‧ fifth inductor
200‧‧‧Wireless communication device
201‧‧‧Display unit
222‧‧‧ Rear double lens
203‧‧‧Receiver
224, 205‧‧‧ openings
207‧‧‧ front lens
210‧‧‧Circuit Board Example 2
500‧‧‧Antenna structure
51‧‧‧Metal parts
511‧‧‧ metal front frame
512‧‧‧Metal backplane
513‧‧‧Metal border
514‧‧‧ accommodating space
515‧‧‧ bottom
516‧‧‧ first side
517‧‧‧ second side
518‧‧‧ slotting
5112‧‧‧First breakpoint
5114‧‧‧second breakpoint
5116‧‧‧ third breakpoint
5118‧‧‧ fourth breakpoint
62‧‧‧First radiant section
B1‧‧‧Metal long arm
B2‧‧‧Metal short arm
64‧‧‧second radiant section
66‧‧‧third radiant section
68‧‧‧Feeding source
52‧‧‧Feeding Department
53‧‧‧First grounding
54‧‧‧ radiator
542‧‧‧First arm
544‧‧‧second arm
546‧‧‧ third arm
55‧‧‧Second grounding
56‧‧‧The third grounding
57‧‧‧First matching circuit
C1‧‧‧first capacitor
L1‧‧‧first inductance
L2‧‧‧second inductance
58‧‧‧Second matching circuit
L3‧‧‧ third inductance
C2‧‧‧second capacitor
S‧‧‧Toggle switch
L41, L42...L48‧‧‧ fourth inductor
L5‧‧‧ fifth inductor
600‧‧‧Wireless communication device
601‧‧‧ display unit
602‧‧‧ headphone socket
603‧‧‧USB connector
604‧‧‧Speaker
610‧‧‧Circuit board

1 is a schematic diagram of an antenna structure according to a first embodiment of the present invention applied to a wireless communication device. 2 is a schematic view showing the assembly of the antenna structure shown in FIG. 1. 3 is a schematic view showing the assembly of the wireless communication device shown in FIG. 1 at another angle. 4 is a current flow diagram of the antenna structure shown in FIG. 2 during operation. Fig. 5 is a circuit diagram of a first matching circuit in the antenna structure of the first embodiment of the present invention. Fig. 6 is a circuit diagram of a second matching circuit in the antenna structure of the first embodiment of the present invention. 7 is a return loss (Return Loss) graph of the first radiating section, the third radiating section, and the first radiator of the antenna structure shown in FIG. 8 is a graph showing a return loss of a first radiating section, a third radiating section, a first radiator, and an operation of the extractor shown in FIG. 2. FIG. 9 is a return loss (Return Loss) curve of the second radiating section of the antenna structure shown in FIG. 2. FIG. FIG. 10 is a return loss (Return Loss) curve of the second radiator of the antenna structure shown in FIG. 2. FIG. 11 is a graph showing the efficiency of the first radiating section, the third radiating section, and the first radiator of the antenna structure shown in FIG. Figure 12 is a graph showing the efficiency of the second radiating section of the antenna structure shown in Figure 2 when operating. FIG. 13 is a graph showing the efficiency of the second radiator of the antenna structure shown in FIG. FIG. 14 is a graph showing a return loss (Return Loss) curve when the antenna structure shown in FIG. 2 is switched to a different fourth inductor L41, L42, . . . L48 by the switch S. 15 is a schematic diagram of an antenna structure applied to a wireless communication device according to a second embodiment of the present invention. Figure 16 is a schematic view showing the assembly of the antenna structure shown in Figure 15. 17 is a schematic view showing the assembly of the wireless communication device shown in FIG. 15 at another angle. Figure 18 is a current flow diagram of the antenna structure shown in Figure 16 during operation. Figure 19 is a circuit diagram of a first matching circuit in an antenna structure according to a second embodiment of the present invention. Figure 20 is a circuit diagram of a second matching circuit in the antenna structure of the second embodiment of the present invention. Figure 21 is a graph showing the return loss (Return Loss) of the antenna structure shown in Figure 16. Figure 22 is a graph showing the efficiency of the antenna structure shown in Figure 16 during operation. FIG. 23 is a graph showing a return loss (Return Loss) curve when the antenna structure shown in FIG. 16 is switched to a different fourth inductance by a switch. FIG. 24 is a graph showing a return loss (Return Loss) curve when the second matching circuit of the antenna structure shown in FIG. 16 is matched with the second capacitor of different capacitance values.

no

100‧‧‧Antenna structure

11‧‧‧Metal parts

1112‧‧‧First breakpoint

1114‧‧‧second breakpoint

1116‧‧‧ third breakpoint

1118‧‧‧four breakpoint

22‧‧‧First radiant section

24‧‧‧second radiant section

26‧‧‧The third radiant section

A1‧‧‧Metal long arm

A2‧‧‧Metal short arm

12‧‧‧First Feeding Department

13‧‧‧First grounding

14‧‧‧First radiator

142‧‧‧First arm

144‧‧‧second arm

146‧‧‧ third arm

15‧‧‧Second Feeding Department

16‧‧‧Second grounding

17‧‧‧Second radiator

18‧‧‧ Third Feeding Department

19‧‧‧ Third grounding

202‧‧‧ Rear double lens

203‧‧‧Receiver

207‧‧‧ front lens

210‧‧‧ boards

Claims (20)

An antenna structure includes a metal member and a first feeding portion, the metal member includes a metal front frame, a metal back plate, and a metal frame, and the metal frame is sandwiched between the metal front frame and the metal back plate. The metal frame is provided with a slot, and the improvement is that: the first breakpoint and the second breakpoint are formed on the metal front frame, and the first breakpoint and the second breakpoint are respectively adjacent to the slotted The first break point and the second break point are in communication with the slot and extend to block the metal front frame, and the metal front frame between the first break point and the second break point forms a first a radiating section, the antenna structure further comprising a first matching circuit and a second matching circuit, the first matching circuit comprising an extractor, the first feeding part is electrically connected to the first radiating section at one end, and the other end passes through the The extractor is electrically connected to the first feed source and the second feed source, and the second matching circuit includes at least a third inductor and a third capacitor, and the first radiating section is adjacent to the end of the second breakpoint The third inductor and the third capacitor are connected to ground. The antenna structure of claim 1, wherein the slot and the breakpoint are filled with an insulating material. The antenna structure of claim 1, wherein the metal frame comprises at least a top portion, a first side portion and a second side portion, the first side portion and the second side portion being respectively connected to the top portion The third slot breaks from the top of the metal frame to the first side portion and the second side portion, and the metal front frame further defines a third break point and a fourth break point. And the fourth break point is respectively located at opposite ends of the slot. The antenna structure of claim 3, wherein the first break point, the second break point, the third break point, and the fourth break point divide the first radiant section from the metal front frame, a second radiant section and a third radiant section, the second radiant section being located between the first breakpoint and the third breakpoint, the second radiant section extending from the top edge of the metal front frame to the side, the third radiant section being located Between the second break point and the fourth break point, the third radiating section extends from the top edge of the metal front frame to the other side. The antenna structure of claim 4, wherein the first radiating section is divided into a metal long arm facing the first break point and a metal facing the second break point by using the first feed portion as a separation point. The short arm, the length of the metal long arm is greater than the length of the metal short arm. The antenna structure of claim 5, wherein the antenna structure further comprises a first grounding portion, the first grounding portion is connected at one end to one end of the first radiating segment close to the first breaking point, and the other end Ground. The antenna structure of claim 6, wherein the first matching circuit further includes a first inductor, a first capacitor, a second inductor, and a second capacitor, wherein the first feeding portion passes the first inductor Grounding, one end of the extractor is electrically connected to the first feeding portion and the first inductor through the first capacitor, and the other end is grounded through the second inductor and the second capacitor in sequence, the first feeding source Electrically connected between the extractor and the second inductor, the second feed source is electrically connected between the second inductor and the second capacitor. The antenna structure of claim 7, wherein the first feed source is a diversity feed source, the second feed source is a GPS feed source, the metal long arm, and the first feed portion The first matching circuit and the first grounding portion excite the first mode to generate a radiation signal of the first frequency band, the first mode is an LTE-A high frequency mode, and the first frequency band is a frequency band of 2300-2690 MHz. The antenna structure of claim 8, wherein the antenna structure further comprises a first radiator, the first radiator comprising a first arm, a second arm and a third arm connected in sequence, the An arm spans the second break point and two ends are respectively connected to the metal short arm and the third radiating section are respectively located at two sides of the second break point, and one end of the second arm is connected to the first arm And extending toward the third radiating section, one end of the third arm is connected to the second arm, and the other end is connected to the third radiating section. The antenna structure of claim 9, wherein the second matching circuit further includes a switch and a plurality of fourth inductors, and one end of the switch is electrically connected to the third inductor and the third capacitor The other end is selectively electrically connected to one end of one of the plurality of fourth inductors, and the other end of the fourth inductor is grounded. The antenna structure according to claim 10, wherein the first matching circuit, the first feeding portion, the metal short arm, the first arm of the first radiator, and the third inductance and the third of the second matching circuit are The capacitor excites a second mode to generate a radiation signal of the second frequency band; the third matching circuit of the first matching circuit, the first feeding portion, the metal short arm, the third radiating portion, the first radiator and the second matching circuit And one of the fourth inductors excites a third mode to generate a radiation signal of the third frequency band. The antenna structure of claim 11, wherein the second mode is an LTE-A intermediate frequency mode and a GPS mode, and the second frequency band is a 1805-2170 MHz band; the third mode For the LTE-A low frequency mode, the third frequency band is the 704-960 MHz frequency band. The antenna structure of claim 12, wherein the metal short arm, the third radiating section and the first radiator are switched to different fourth inductors by controlling switching of the switching switch, each fourth The inductors have different impedances to adjust the frequency band of the third mode, and the adjustment is to shift the third frequency band to a low frequency or to a high frequency. The antenna structure of claim 4, wherein the antenna structure further includes a second feeding portion and a second ground portion, the second feeding portion and the second ground portion being spaced apart from each other by the second radiation The segment is adjacent to one end of the first breakpoint, and the second feedthrough is electrically connected to a WiFi 2.4G feed source. The antenna structure of claim 14, wherein the second feeding portion, the second radiating portion and the second ground portion excite a fourth mode to generate a radiation signal of a fourth frequency band, the fourth mode The state is a WiFi 2.4G mode, and the fourth frequency band is a 2400-2500 MHz band. The antenna structure of claim 1, wherein the antenna structure further includes a second radiator, a third feeding portion, and a third ground portion, wherein the second radiator is substantially an L-shaped metal sheet, the The third feeding portion and the third grounding portion are vertically connected to one end of the second radiator, and the third feeding portion is electrically connected to a WiFi 5G feeding source. The antenna structure of claim 16, wherein the third feeding portion, the second radiator and the third ground portion excite a fifth mode to generate a radiation signal of a fifth frequency band, the fifth mode The state is a WiFi 5G mode, and the fifth frequency band is a 5150-5825 MHz frequency band. The antenna structure of claim 4, wherein the width of the slot is set to be 3-4.5 mm, that is, the first radiating section, the second radiating section, and the third radiating section are disposed from the metal backplane. It is 3-4.5 mm; the width of the breakpoint is set to 1.5-2.5 mm. The antenna structure of claim 1, wherein the metal back plate is an integrally formed single metal piece, and the metal back plate is directly connected to the metal frame, and there is no gap between the metal back plate and the metal frame. The metal backplane is not provided with any slotted, broken or broken points for separating the metal backplane. A wireless communication device comprising the antenna structure according to any one of claims 1 to 19.