TW201806242A - Antenna structure and wireless communication device using same - Google Patents

Abstract

The present invention provides an antenna structure including a metallic member, a feed portion, a ground portion, and a first radiating portion. The metallic member includes a front frame, a backboard, and a side frame. The side frame defines a slot. The front frame defines a first gap and a second gap. The first gap and the second gap are defined between opposite ends of the slot and communicate with the slot to separate the front frame. The front frame between the first gap and the second gap forms a radiating section. The feed portion and the ground portion connect to the radiating section and are spaced apart from each other. The first radiating portion connects to the front frame and is adjacent to the second gap. Current is fed into the radiating section from the feed portion and flows towards the second gap, the first radiating portion obtains current by coupling. The radiating section and the first radiating portion activate radiation signals in two frequency bands. A wireless communication device using the antenna structure is also provided.

Description

Antenna structure and wireless communication device having the same

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

With the advancement of wireless communication technology, wireless communication devices continue to develop toward the trend of thinness and lightness, and consumers' requirements for the appearance of products are becoming higher and higher. Because metal casings have advantages in appearance, mechanical strength, and heat dissipation effects, more and more manufacturers have designed wireless communication devices with metal casings, such as metal backplanes, to meet consumer demand. However, the metal casing easily interferes with the signal radiated by the antenna that is shielded in it, and it is not easy to achieve a broadband design, resulting in poor radiation performance of the built-in antenna. Furthermore, the metal back plate is usually provided with slots and break points, which will affect the integrity and aesthetics of the metal back plate.

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

An antenna structure includes a metal piece, a feeding portion, and a ground portion. The metal piece includes a metal front frame, a metal back plate, and a metal frame. The metal frame is sandwiched between the metal front frame and the metal back plate. The metal frame includes at least a top portion, and a slot is formed on the metal frame, the slot is arranged at least on the top portion, and a first breakpoint and a second breakpoint are set on the metal front frame. A first breakpoint and a second breakpoint are respectively disposed near two ends of the slot, and the first breakpoint and the second breakpoint communicate with the slot and extend to cut off the metal front frame, which is located at the first A metal front frame between a breakpoint and a second breakpoint forms a radiating section, and the feeding portion and the ground portion are connected to the radiating section at intervals. The antenna structure further includes a first radiator, and the radiator is connected to The metal front frame is arranged at a distance from the second break point, and the current is fed from the feeding section to the radiation section and flows along the radiation section to the second break point, and the first radiator Coupling to obtain current, the radiating section and the first radiator are respectively Send two different bands of radiation signal.

A wireless communication device includes the antenna structure described above.

The antenna structure is provided with the metal piece, and the slots and breakpoints on the metal piece are provided on the metal front frame and the metal frame, but not on the metal back plate, so that The metal backplane forms an all-metal structure, that is, the metal backplane has no insulating slots, breaks or breakpoints, so that the metal backplate can avoid affecting the metal due to the slotting, breakage or breakpoint settings The integrity and aesthetics of the backplane.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that when one element is called "electrically connected" to another element, it may be directly on the other element or there may be a centered element. 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 defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the present invention is for the purpose of describing specific embodiments only and is not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

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

Example 1

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

Please refer to FIG. 1 and FIG. 2 together. The antenna structure 100 includes a metal member 11, a feeding portion 13, a ground portion 14, a first radiator 15, a second radiator 16, and a first matching circuit 17 (see FIG. 5). And a second matching circuit 18 (see FIG. 6).

The metal part 11 may be a casing of the wireless communication device 200. The metal component 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 a casing of the wireless communication device 200. The metal front frame 111 is provided with an opening (not shown) 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, the display plane is exposed from the opening, and the display plane is substantially parallel to the metal back plate 112.

Please refer to FIG. 3 together. The metal back plate 112 is 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 sheet. The metal back plate 112 is provided with openings 204 and 205 for exposing elements such as the rear dual lens 202 and the receiver 203. The metal back plate 112 is not provided. Any slot, break, or breakpoint used to divide the insulation of the metal back plate 112 (see Figure 3). The metal back plate 112 can be used as a ground of the antenna structure 100.

The metal frame 113 is sandwiched between the metal front frame 111 and the metal back plate 112, and is disposed around the periphery of the metal front frame 111 and the metal back plate 112 to communicate with 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 used for accommodating electronic components or circuit modules such as a circuit board 210 and a processing unit of the wireless communication device 200 therein. 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. On the circuit board 210 of the wireless communication device 200.

The metal frame 113 includes at least a top portion 115, a first side portion 116, and a second side portion 117. The top 115 is connected to the metal front frame 111 and the metal back plate 112. The first side portion 116 and the second side portion 117 are disposed opposite to each other, and the two are respectively disposed at two ends of the top portion 115, and preferably are vertically disposed at both 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 slot 118 is disposed on the top portion 115 and extends 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 be provided 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 portion The groove 118 is provided on the top portion 115 and extends along only one of the first side portion 116 and the second side portion 117.

A first breakpoint 1112 and a second breakpoint 1114 are spaced from the top edge of the metal front frame 111. The breakpoints 1112 and 1114 communicate with the slot 118 and extend to block the metal front frame 111. A straight radiation segment 12 is formed between two break points 1112 and 1114 of the metal front frame 111. In this embodiment, the first breakpoint 1112 and the second breakpoint 1114 are respectively disposed near the corners of the two opposite ends of the top edge of the metal front frame 111. In addition, the slot 118 and the breakpoints 1112 and 1114 are filled with an insulating material (such as plastic, rubber, glass, wood, ceramic, etc., but not limited to this), so as to separate the radiating section 12 With the rest of the metal piece 11.

It can be understood that the upper half of the metal front frame 111 is not provided with other insulation slots, breaks or breakpoints except the breakpoints 1112 and 1114, so the upper half of the metal front frame 111 has only two Breakpoints 1112, 1114, no other breakpoints.

One end of the feeding portion 13 is connected to a position closer to the radiating section 12 near the second break point 1114, and the other end of the feeding portion 13 is electrically connected to the feeding source 19 through the first matching circuit 17, thereby feeding The input section 13 feeds current to the radiation section 12. In this embodiment, after a current is fed from the feeding section 13, the current is transmitted to the first breakpoint 1112 and the second breakpoint 1114 in the radiating section 12, respectively, so that the radiating section 12 uses the feeding section 13 as a separation point. It is divided into a metal long arm A1 facing the first break point 1112 and a metal short arm A2 facing the second break point 1114. One end of the ground portion 14 is connected to a position of the radiating section 12 which is closer to the first break point 1112, and the other end is connected to the ground plane through the second matching circuit 18. Each of the feeding portion 13 and the ground portion 14 is substantially a metal sheet. In this embodiment, the position where the feed-in portion 13 is connected does not correspond to the middle of the radiating section 12, 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 17 is disposed on the circuit board 210. One end of the first matching circuit 17 is electrically connected to the feeding portion 13, and the other end is connected to the feeding source 19. The first matching circuit 17 includes a first capacitor C1, a second capacitor C12, and an adjustable inductor Ls. The feeding portion 13 is connected to the feeding source 19 through the first capacitor C1. One end of the second capacitor C2 is electrically connected between the feeding portion 13 and the first capacitor C1, and the other end is connected to a ground plane. One end of the adjustable inductor Ls is electrically connected between the feeding portion 13 and the first capacitor C1, and the other end is connected to a ground plane. The adjustable inductance Ls can be switched between a plurality of different preset inductance values. In this embodiment, the capacitance value of the first capacitor C1 may be 1.3 picofarads, and the capacitance value of the second capacitor C2 may be 1.5 picofarads. It can be understood that, in other embodiments, the adjustable inductor Ls may also be replaced by a switch and a plurality of fixed-value inductors.

Referring to FIG. 6, the second matching circuit 18 is disposed on the circuit board 210. One end of the second matching circuit 18 is electrically connected to the ground portion 14, and the other end is connected to a ground plane. The second matching circuit 18 includes a first inductor L1, a second inductor L2, and a third capacitor C3. One end of the first inductor L1 is electrically connected to the ground portion 14, and the other end is connected to a ground plane through the third capacitor C3. One end of the second inductor L2 is electrically connected between the first inductor L1 and the third capacitor C3, and the other end is connected to a ground plane. In this embodiment, the inductance value of the first inductor L1 may be 2.7 nanohenries, the inductance value of the second inductor L2 may be 10 nanohenries, and the capacitance value of the third capacitor C3 may be 1 picofarad.

The feeding section 13 feeds current from a feeding source 19 through the first matching circuit 17, and the current flows along the short metal arm A2 to the second breakpoint 1114 and along the long metal arm A1 to the first breakpoint. 1112, and simultaneously flows to the ground portion 14 and the second matching circuit 18 to excite a first mode to generate a radiation signal in a first frequency band. In this embodiment, the first mode includes the LTE-A low-frequency mode and the LTE-A intermediate-frequency mode, and the first frequency band includes the LTE-A low-frequency band 700-900MHz and the LTE-A intermediate-frequency band 1800- 1900MHz. The feeding portion 13 feeds current from a feeding source 19 through the first matching circuit 17, and the current flows along the long metal arm A1 to the first break point 1112, and flows to the ground portion 14 and the second matching portion. The circuit 18 is configured to excite a second mode to generate a radiation signal in a second frequency band. In this embodiment, the second mode is a GPS mode, and the second frequency band is 1575 MHz. The feeding unit 13 feeds current from the feeding source 19 through the first matching circuit 17, and the current flows along the short metal arm A2 to the second breakpoint 1114 to excite a third mode to generate a third frequency band. Radiation signal. In this embodiment, the third mode is an LTE-A high-frequency mode, and the third frequency band is 2200-2300 MHz. By controlling the inductance value of the adjustable inductance Ls, the metal long arm A1, the metal short arm A2, and the feeding portion 13 can be connected to the adjustable inductance Ls of different inductance values to adjust the first mode LTE- A low frequency band. The adjustment of the frequency band is to shift the frequency band to a low frequency or to a high frequency. Therefore, the functions of the diversity antenna and the GPS antenna are integrated in the first matching circuit 17, the feeding portion 13, the metal short arm A2, the metal long arm A1, the ground portion 14, and the second matching circuit 18.

The first radiator 15 is substantially an elongated metal sheet body. The first radiator 15 is connected to an end of the metal front frame 111 near the second break point 1114 and opposite to the radiation section 12. The first radiator 15 is coupled to obtain a current from the metal short arm A2 to excite a fourth mode to generate a radiation signal in a fourth frequency band. In this embodiment, the fourth mode is an LTE-A high-frequency mode, and the fourth frequency band is 2500-2700 MHz.

The second radiator 16 includes a first arm 162 and a second arm 164. The first arm 162 is generally an L-shaped metal sheet body. One end of the first arm 162 is connected to the metal front frame 111 near the first break point 1112 and opposite to the end of the radiation section 12, and extends to the inner accommodation space 114. Bend. The second arm 164 is substantially a U-shaped metal sheet body, and one end thereof is connected to an end of the first arm 162 away from the metal front frame 111. The second radiator 16 is coupled to obtain a current from the metal long arm A1 to excite a fifth mode to generate a radiation signal in a fifth frequency band. In this embodiment, the fifth mode is a WiFi 2.4G mode and a WiFi 5G mode, and the fifth frequency band is 2450 MHz and 5500 MHz. In other embodiments, an end of the second arm 164 away from the first arm 162 may be electrically connected to a feed source to obtain a current feed for the second radiator 16.

In this embodiment, in order to obtain better antenna characteristics, the thickness of the wireless communication device 200 may be set to 7.43 mm. The width of the slot 118 can be set to 3-4.5 mm. Preferably, the width of the slot 118 can be set to 3.5 mm, that is, the radiating section 12 is set to be 3.5 mm away from the metal back plate 112, so that the radiating section 12 is far away from the metal back plate 112 to enhance the radiation. Antenna efficiency of the segment. The width of the breakpoints 1112 and 1114 can be set to 1.5-2.5 mm. Preferably, the width of the breakpoints 1112 and 1114 is set to 2 millimeters, so as to further improve the antenna efficiency of the radiation section without affecting the overall appearance of the antenna structure 100.

In this embodiment, the feeding portion 13 is disposed at an interval between the rear dual lens 202 and the receiver 203. The ground portion 14 is disposed between the receiver 203 and the front lens 207 at intervals. The first radiator 15 is disposed on a side of the rear dual lens 202 away from the feeding portion 13. The second radiator 16 is disposed at an interval of the front lens 207 away from the ground portion 14.

FIG. 4 is a schematic diagram of a current trend during operation of the antenna structure 100. After the current enters the radiating section 12 from the feeding portion 13, it flows in two directions, one of which flows through the metal long arm A1 and flows to the first break point 1112 and the ground portion 14. At the same time, the other direction is flowing through the metal short arm A2 and flowing to the second breakpoint 1114 (see path P1), and the current path P1 excites the LTE-A low-frequency mode and the LTE-A intermediate-frequency mode. . After the current enters the radiating section 12 from the feeding portion 13, the current flows through the metal long arm A1 and the ground portion 14 in one direction, and flows to the first break point 1112 (see path P2), and the current path P2 is excited. The GPS modal. After the electric current enters the radiating section 12 from the feeding part 13, it flows in the other direction through the short metal arm A2 and flows to the second break point 1114 (see path P3), and the current path P3 excites The third mode is the LTE-A high-frequency mode (2200-2300MHz). The first radiator 15 is coupled to obtain current from the metal short arm A2, and flows along the first radiator 15 (see path P4), thereby exciting the fourth mode, that is, the LTE-A high-frequency mode. (2500-2700MHz). The second radiator 16 obtains current by coupling from the metal long arm A1 or directly obtains current from a feed source, and flows along the second radiator 16 (see path P5), thereby exciting the WiFi 2.4G Modal and WiFi 5G modality.

The ground plane may be the metal back plate 112. Alternatively, a shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 201 may be provided 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 shield or the middle frame. Alternatively, the metal back plate 112 may be connected to the shield or the middle frame to form a larger ground plane. The ground plane is the ground of the antenna structure 100. That is, each of the ground portions or ground points is directly or indirectly connected to the ground plane.

FIG. 7 is a return loss curve diagram of the antenna structure 100 during operation. The antenna structure 100 may cover LTE-A low frequency, intermediate frequency, and high frequency, and may also cover all 2G, 3G, and 4G frequency bands.

FIG. 8 is a return loss curve of the antenna structure 100 in a low frequency band. The antenna structure 100 sets different inductance values through the adjustable inductance Ls of the first matching circuit 17 to adjust the LTE-A low-frequency mode. Among them, curve S81 is the return loss value of the antenna structure 100 when the adjustable inductance Ls is adjusted to 9.1 nanohenries when the adjustable structure Ls is adjusted to 700MHz in the low frequency band; curve S82 is the antenna structure 100 when the adjustable inductance Ls is adjusted to 5.4 nanohenries. The return loss value when operating at 850MHz in the low frequency band; curve S83 is the return loss value when the adjustable structure Ls is adjusted to 4.3 nanohenries when the antenna structure 100 is operating at 900MHz in the low frequency band.

FIG. 9 is a return loss curve diagram of the antenna structure 100 when the first radiator 15 with different sizes works. Wherein, curve S91 is the return loss value when the length of the first radiator 15 is 11.8 mm and the antenna structure 100 is in operation; curve S92 is the value of the return loss when the length of the first radiator 15 is 13.8 mm. The return loss value during operation; curve S93 is the return loss value of the antenna structure 100 when the length of the first radiator 15 is 9.8 mm. As can be seen from FIG. 9, adjusting the size of the first radiator 15 can adjust the LTE-A high-frequency band in the fourth mode to expand the bandwidth.

FIG. 10 is a graph of return loss when the antenna structure 100 is operated with different capacitance values of the third capacitor C3 of the second matching circuit 18. The curve S101 is the return loss of the antenna structure 100 when the capacitance of the third capacitor C3 is 1 picofarad; the curve S102 is the antenna structure 100 when the capacitance of the third capacitor C3 is 1.2 picofarad. The curve S103 is the return loss of the antenna structure 100 when the capacitance of the third capacitor C3 is 0.8 picofarad. As can be seen from FIG. 10, by adjusting the capacitance value of the third capacitor C3 of the second matching circuit 18, the LTE-A high-frequency band of the third mode can be adjusted, and thus a used frequency band, such as a GPS frequency band can be increased.

FIG. 11 is a return loss curve diagram of the antenna structure 100 when different access positions of the adjustment feeding part 13 are operated. The curve S111 is the return loss value of the antenna structure 100 when the feeding portion 13 is at the current position. The curve S112 is 1.5 mm when the feeding portion 13 moves to the left (moving toward the first break point 1112). The return loss value at which the antenna structure 100 works; curve S113 is the return loss value at which the antenna structure 100 works when the feed portion 13 is shifted to the right (moved toward the second break point 1114) by 1.5 mm.

FIG. 12 is a graph of return loss when the antenna structure 100 adjusts different access positions of the ground portion 14 to work. The curve S121 is the return loss of the antenna structure 100 when the grounding portion 14 is at the current position. The curve S122 is 1.5 mm when the grounding portion 14 moves to the left (moving toward the first break point 1112). The return loss value at which the antenna structure 100 works; curve S123 is the return loss value at which the antenna structure 100 works when the ground portion 14 is moved to the right (moved toward the second break point 1114) by 3 mm. As can be seen from FIG. 11 and FIG. 12, by adjusting the positions of the access section 13 and the ground section 14 to access the radiating section 12, the bandwidths of the respective frequency bands can be adjusted, and the bandwidths can be expanded.

FIG. 13 is a graph of the efficiency of the antenna structure 100 when operating in a low frequency band. Among them, the dotted line is the radiation efficiency, and the solid line is the total radiation efficiency. The antenna structure 100 may cover a frequency band of 700-960 MHz, and the antenna radiation efficiency is greater than -6.5 dB.

FIG. 14 is an efficiency curve diagram of the antenna structure 100 when operating in the middle and high frequency bands. Among them, the dotted line is the radiation efficiency, and the solid line is the total radiation efficiency. The antenna structure 100 may cover a frequency band of 1805-2690MHz, and the antenna radiation efficiency is greater than -5.5 dB.

Obviously, as can be seen from FIG. 7 to FIG. 14, the antenna structure 100 can work in the corresponding low-frequency band (700-960 MHz) and the middle-high-frequency band (1805-2690 MHz). In the environment of the all-metal backplane 112, the antenna structure 100 still has better antenna characteristics in LTE-A low, medium and high frequencies, and when the antenna structure 100 operates in the above frequency band, its operating frequency is all It can meet the antenna design requirements and has better radiation efficiency.

The antenna structure 100 is provided with the metal member 11, and the slots and breakpoints on the metal member 11 are provided on the metal front frame 111 and the metal frame 113, but not on the metal back plate. 112, so that the metal back plate 112 forms an all-metal structure, that is, the metal back plate 112 does not have insulation slots, breaks or break points, so that the metal back plate 112 can avoid The setting of lines or breakpoints affects the integrity and aesthetics of the metal back plate 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 wireless communication devices 600 such as mobile phones and personal digital assistants to transmit and receive radio waves to transmit and exchange wireless signals.

15 and FIG. 16 together, the antenna structure 500 includes a metal member 51, a feed portion 53, a ground portion 54, a first radiator 55, a second radiator 56, a third radiator 57, and a fourth radiator. 58. The first matching circuit 62 (see FIG. 19), the second matching circuit 64 (see FIG. 20), and the third matching circuit 66 (see FIG. 21).

The metal piece 51 may be a casing of the wireless communication device 600. The metal piece 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 a casing of the wireless communication device 600. The metal front frame 511 is provided with an opening (not shown) 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, the display plane is exposed from the opening, and the display plane is substantially parallel to the metal back plate 512.

Please refer 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 sheet. The metal back plate 512 is provided with openings 604 and 605 for exposing components such as a rear dual lens and a receiver. Slots, breaks, or breaks for dividing the metal back plate 512. The metal back plate 512 can be used as a ground of the antenna structure 500.

The metal frame 513 is sandwiched between the metal front frame 511 and the metal back plate 512, and is disposed around the periphery of the metal front frame 511 and the metal back plate 512 to communicate 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 used for accommodating electronic components or circuit modules such as a circuit board 610 and a processing unit of the wireless communication device 600 therein. In this embodiment, the electronic component includes at least the headphone socket 602, a USB connector 603, and a speaker 607. The earphone socket 602, the USB connector 603, and the speaker 607 are arranged side by side and spaced from the circuit board 610 of the wireless communication device 600.

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 and the second side portion 517 are disposed opposite to each other, and the two are respectively disposed at two ends of the bottom portion 515, and are preferably vertically disposed at both 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 this embodiment, the slot 518 is disposed on the bottom portion 515 and extends to the first side portion 516 and the second side portion 517, respectively. It can be understood that, in other embodiments, the slot 518 may be provided only on the bottom portion 515 and does not extend to any one of the first side portion 516 and the second side portion 517, or the opening The groove 518 is disposed on the bottom portion 515 and extends along only one of the first side portion 516 and the second side portion 517.

A first break point 5112 and a second break point 5114 are respectively symmetrically formed on both sides of the bottom side of the metal front frame 511 near the corners. The first breakpoint 5112 and the second breakpoint 5114 are respectively near two opposite ends of the slot 518. The breakpoints 5112, 5114 communicate with the slot 518, and extend to block the metal front frame 511. A portion of the metal front frame 511 between the first break point 5112 and the second break point 5114 forms a radiation segment 52. In this embodiment, the radiation section 52 extends in a straight line on the bottom edge of the metal front frame 511. In addition, the slot 518 and the breakpoints 5112, 5114 are filled with an insulating material (such as plastic, rubber, glass, wood, ceramic, etc., but not limited to this), so as to separate the radiating section 52. With the rest of the metal piece 51.

It can be understood that the lower half of the metal front frame 511 is not provided with other insulation slots, breaks, or breakpoints in addition to the breakpoint, so the lower half of the metal front frame 511 has only two breakpoints. 5112, 5114, no other breakpoints.

One end of the feeding section 53 is connected to a position of the radiating section 52 which is closer to the second break point 5114, and the other end is connected to the feeding source 68 through the first matching circuit 62, so that the feeding section 53 is the radiating section. 52 is fed with current. In this embodiment, after a current is fed from the feeding portion 53, the current is transmitted to the first break point 5112 and the second break point 5114 in the radiating section 52, so that the radiating section 52 uses the feeding section 53 as a separation point. It is 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 access position of the feeding portion 53 does not correspond to the middle of the radiating section 52, so the length of the metal long arm B1 is greater than the length of the metal short arm B2.

Referring to FIG. 19, the first matching circuit 62 is disposed on the circuit board 610. The first matching circuit 62 includes a first capacitor C1 and a first inductor L1. One end of the first capacitor C1 is electrically connected to the feeding portion 53, and the other end is electrically connected to the feeding source 68. One end of the first inductor L1 is electrically connected between the first capacitor C1 and the feeding portion 53, and the other end is connected to a ground plane. In this embodiment, the capacitance value of the first capacitor C1 is 1.2 picofarads, and the inductance value of the first inductor L1 is 15 nanohenries.

The ground portion 54 is disposed at a distance from the feeding portion 53, and one end thereof is connected to the metal long arm B1, and the other end is grounded through the second matching circuit 64. Referring to FIG. 20, the second matching circuit 64 includes a switching unit 642 and at least one switching element 644. Each of the switching elements 644 may be an inductor, a capacitor, or a combination of an inductor and a capacitor. The switching elements 644 are connected in parallel with each other, and one end of the switching elements 644 is electrically connected to the switching unit 642, and the other end is electrically connected to a ground plane. In this way, by controlling the switching of the switching unit 642, the radiating section 52 can be switched to a different switching element 644 through the ground portion 54. Each switching element 644 has a different impedance.

The first radiator 55 is connected to an end of the metal short arm B2 near the second breakpoint 5114, and the second radiator 56 is connected to the metal front frame 511 near the second breakpoint 5114 and Opposite one end of the metal short arm B2. The first radiator 55 and the second radiator 56 are disposed at intervals from the second breakpoint 5114 and are respectively disposed on opposite sides of the second breakpoint 5114. The third radiator 57 is connected to an end of the metal front frame 511 near the first break point 5112 and opposite to the metal long arm B1.

The feeding unit 53 feeds current from a feeding source 68 through the first matching circuit 62, and the current flows in both directions, one of which flows through the metal long arm B1 and flows to the first breakpoint. 5112, and flows to the ground portion 54 and the second matching circuit 64, thereby exciting a first mode to generate a radiation signal in a first frequency band. In this embodiment, the first mode is an LTE-A low-frequency mode, and the first frequency band is a 704-960 MHz frequency band. After the current is fed into the radiating section 52 from the feeding section 53, the other direction flows through the metal short arm B2, flows to the second break point 5114, and flows through the first radiator 55. To excite a second mode to generate a radiation signal in a second frequency band. In this embodiment, the second mode is an LTE-A intermediate frequency mode, and the second frequency band is a 1700-1900 MHz frequency band. The second radiator 56 is coupled to obtain a current from the metal short arm B2, and the current flows through the second radiator 56 to excite a third mode to generate a radiation signal in a third frequency band. In this embodiment, the third mode is an LTE-A intermediate frequency mode, and the third frequency band is a 1900-2200 MHz frequency band. The third radiator 57 is coupled to obtain a current from the metal long arm B1, and the current flows through the third radiator 57 to excite a fourth mode to generate a radiation signal in a fourth frequency band. In this embodiment, the fourth mode is an LTE-A high-frequency mode, and the fourth frequency band is a 2200-2500MHz frequency band.

By controlling the switching of the switching unit 642, the metal long arm B1 can be switched to a different switching element 644. Since each switching element 644 has a different impedance, the first frequency band of the first mode of the metal long arm B1 can be adjusted through the switching of the switching unit 642, and the second mode has stability and stability. Wider bandwidth. The adjustment of the frequency band is to shift the frequency band to a low frequency or to a high frequency.

The fourth radiator 58 is substantially an L-shaped metal sheet body, and is disposed at a distance from the metal long arm B1. An end of the fourth radiator 58 remote from the metal long arm B1 is connected to the feeding source 69 through the third matching circuit. The third matching circuit 66 is disposed on the circuit board 610. Referring to FIG. 21, the third matching circuit 66 includes a second capacitor C2 and a second inductor L2. One end of the second capacitor C2 is electrically connected to the fourth radiator 58, and the other end is electrically connected to the feeding source 69. One end of the second inductor L2 is electrically connected between the feeding source 69 and the second capacitor C2, and the other end is grounded. The fourth radiator 58 feeds current from the feed source 69 through the third matching circuit 66 and flows along the fourth radiator 58, thereby exciting a fifth mode to generate a radiation signal in a fifth frequency band. In this embodiment, the fifth mode is an LTE-A high-frequency mode, and the fifth frequency band is a 2500-2700 MHz frequency band. In this embodiment, the capacitance value of the second capacitor C2 is 1.2 picofarads, and the inductance value of the second inductor L2 is 15 nanohenries. In another embodiment, the third matching circuit 66 and the feeding source 69 may be omitted, and the fourth radiator 58 may not directly feed current from the feeding source 69, but may be coupled from the metal long arm B1. Get the current.

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 provided on a side of the display unit 601 facing the metal back plate 512. The mask or the middle frame is made of a metal material. The ground plane may also be the shield or the middle frame. Alternatively, the metal back plate 512 may be connected to the shield or the middle frame to form a larger ground plane. The ground plane is the ground of the antenna structure 500. That is, each of the ground portions is directly or indirectly connected to the ground plane.

In this embodiment, in order to obtain better antenna characteristics, the width of the slot 518 may be set to 3-4.5 mm, and preferably, 3.9 mm, that is, the radiating section 52 is 512 away from the metal back plate 512. It is set to 3.9 mm so that the radiating section 52 is far away from the metal back plate 512 to improve the antenna efficiency of the radiating section. The width of the breakpoints 5112, 5114 is set to 1.5-2.5 mm, and preferably, 2 mm, to further improve the antenna efficiency of the radiating section without affecting the overall appearance of the antenna structure 500. . The thickness of the metal front frame 511 may be set to 1.5 mm, that is, the thickness of the breakpoints 5112 and 5114 may be set to 1.5 mm.

FIG. 18 is a schematic diagram of a current trend during operation of the antenna structure 500. After the current enters the radiating section 52 from the feeding portion 53, it flows to both sides, one of which flows through the metal long arm B1 and flows to the first break point 5112 and the ground portion 54 ( See path P1), and further excite the LTE-A low frequency mode (704-960MHz). After the current enters the radiating section 52 from the feeding portion 53, the current flows in the other direction through the short metal arm B2, and flows to the second break point 5114, and flows to the first radiator 55 (see Path P2), which further excites the LTE-A intermediate frequency mode (1700-1900 MHz). The second radiator 56 is coupled to obtain current from the metal short arm B2, and flows along the second radiator 56 (see path P3), thereby exciting the LTE-A intermediate frequency mode (1900-2200MHz). ). The third radiator 57 is coupled to obtain a current from the metal long arm B1 and flows along the third radiator 57 (see path P4), thereby exciting the LTE-A high-frequency mode (2200-2500MHz). The fourth radiator 58 feeds a current from a feed source through the third matching circuit 66 or obtains a current from the metal long arm B1, and the current flows along the fourth radiator 58 (see path P5). , Which further excites the LTE-A high-frequency mode (2500-2700MHz).

The feeding portion 53 and the ground portion 54 are disposed between the headphone socket 602 and the USB connector 603 at intervals. The first radiator 55 and the second radiator 56 are disposed on a side of the earphone socket 602 away from the feeding portion 53 at intervals. The third radiator 57 is disposed on one side of the speaker 607. The fourth radiator 58 is disposed between the metal long arm B1 and the speaker 607.

FIG. 22 is a return loss curve diagram when the second matching circuit 64 of the antenna structure 500 is switched to a switching element 644 with a different inductance value. The antenna structure 500 generates the LTE-A low-frequency mode through the first matching circuit 62, and adjusts the frequency band of the low-frequency mode by switching to the switching element 644 with a different inductance value through the second matching circuit 64.

FIG. 23 is a graph of return loss when the antenna structure 500 is operated in the LTE-A intermediate frequency band and the LTE-A high frequency band. The curve S231 is the return loss value when the antenna structure 500 works in the LTE-A intermediate frequency band, and the curve S232 is the return loss value when the antenna structure 500 works in the LTE-A high frequency band.

FIG. 24 is a return loss curve diagram of the antenna structure 500 when the first radiator 55 with different sizes works. The curve S241 is a return loss value when the antenna structure 500 is in operation when the length of the first radiator 55 is 2.2 mm; the curve S242 is the antenna structure 500 when the length of the first radiator 55 is 1.2 mm. The return loss value during operation; curve S243 is the return loss value of the antenna structure 100 when the length of the first radiator 55 is 3.2 mm.

FIG. 25 is a return loss curve diagram of the antenna structure 500 when the third radiator 57 with different sizes works. Wherein, the curve S251 is the return loss value when the length of the third radiator 57 is 8.6 mm and the antenna structure 500 works; the curve S252 is the value of the antenna structure 500 when the length of the third radiator 57 is 7.6 mm. The return loss value during operation; curve S253 is the return loss value of the antenna structure 100 when the length of the third radiator 57 is 9.6 mm.

FIG. 26 is a return loss curve diagram of the antenna structure 100 when working with second radiators 56 of different sizes. Wherein, the curve S261 is the return loss value when the antenna structure 100 is in operation when the length of the second radiator 56 is 9.8 mm, and the curve S262 is the antenna structure 100 when the length of the second radiator 56 is 8.8 mm. The return loss value during operation; curve S263 is the return loss value when the antenna structure 100 is in operation when the length of the second radiator 56 is 10.8 mm.

As can be seen from FIGS. 24-26, adjusting the size of the first radiator 55 can adjust the LTE-A intermediate frequency band of the second mode; adjusting the size of the second radiator 56 can adjust the third mode LTE-A intermediate frequency band of the state; adjusting the size of the third radiator 57 can adjust the LTE-A high frequency band of the fourth mode.

FIG. 27 is an efficiency curve diagram of the antenna structure 100 when operating in a low frequency band. The uppermost curve is the radiation efficiency, and the lower multiple curves are the total radiation efficiency when the second matching circuit 64 is switched to the switching element 644 with a different inductance value. The antenna structure 100 may cover a frequency band of 700-960 MHz, and the antenna radiation efficiency is greater than -6 dB.

FIG. 28 is an efficiency curve diagram of the antenna structure 100 when operating in an intermediate frequency band. Among them, the upper curve is the radiation efficiency, and the lower curve is the total radiation efficiency. The antenna structure 100 may cover a frequency band of 1710-2170 MHz, and the antenna radiation efficiency is greater than -3.5 dB.

FIG. 29 is an efficiency curve diagram of the antenna structure 100 when operating in a high frequency band. Among them, the upper curve is the radiation efficiency, and the lower curve is the total radiation efficiency. The antenna structure 100 may cover a frequency band of 2300-2690MHz, and the antenna radiation efficiency is greater than -4.5 dB.

Obviously, the applicable operating frequency range of the antenna structure 500 covers the LTE-A low frequency band (703-960 MHz), the LTE-A intermediate frequency band (1710-2170MHz), and the LTE-A high frequency band (2300-2690MHz). It has a wide range and can be applied to operation in multiple frequency bands. When the antenna structure 500 operates in the above frequency bands, its operating frequency can meet the antenna design requirements and has better radiation efficiency.

The antenna structure 500 is provided with the metal piece 51, and the slots and breakpoints on the metal piece 51 are provided on the metal front frame 511 and the metal frame 513, but not on the metal back plate. 512, so that the metal back plate 512 constitutes an all-metal structure, that is, the metal back plate 512 does not have insulation slots, disconnections or break points, so that the metal back plate 512 can avoid The setting of lines or breakpoints affects the integrity and aesthetics of the metal back plate 512.

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

The above descriptions are merely 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 make other changes within the spirit of the present invention. Of course, these changes made in accordance with the spirit of the present invention should be included in the scope of protection of the present invention.

100‧‧‧ Antenna Structure
11‧‧‧ metal parts
111‧‧‧ metal front frame
112‧‧‧metal back plate
113‧‧‧metal frame
114‧‧‧accommodation space
115‧‧‧Top
116‧‧‧First side
117‧‧‧ second side
118‧‧‧Slotted
1112‧‧‧First breakpoint
1114‧‧‧ Second breakpoint
12‧‧‧ radiation segment
A1‧‧‧metal long arm
A2‧‧‧ metal short arm
13‧‧‧Feeding Department
14‧‧‧ Ground
15‧‧‧ first radiator
16‧‧‧Second radiator
162‧‧‧First arm
164‧‧‧ second arm
17‧‧‧first matching circuit
19‧‧‧ feed source
C1‧‧‧first capacitor
C2‧‧‧Second capacitor
Ls‧‧‧ adjustable inductor
18‧‧‧Second matching circuit
L1‧‧‧First inductor
L2‧‧‧Second inductor
C3‧‧‧Third capacitor
200‧‧‧Wireless communication device
201‧‧‧display unit
202‧‧‧ rear dual camera
203‧‧‧ Receiver
204, 205‧‧‧ opening
207‧‧‧Front lens
210‧‧‧Circuit Board Example 2
500‧‧‧ Antenna Structure
51‧‧‧metal parts
511‧‧‧ metal front frame
512‧‧‧metal back plate
513‧‧‧metal frame
514‧‧‧accommodation space
515‧‧‧ bottom
516‧‧‧first side
517‧‧‧second side
518‧‧‧Slotted
5112‧‧‧First breakpoint
5114‧‧‧ Second breakpoint
52‧‧‧ Radiation Section
B1‧‧‧metal long arm
B2‧‧‧ metal short arm
53‧‧‧Feeding Department
54‧‧‧ Ground
55‧‧‧ first radiator
56‧‧‧Second radiator
57‧‧‧Third radiator
58‧‧‧ Fourth radiator
62‧‧‧first matching circuit
C1‧‧‧first capacitor
L1‧‧‧First inductor
64‧‧‧Second matching circuit
642‧‧‧switching unit
644‧‧‧switching element
66‧‧‧Third matching circuit
68, 69‧‧‧ feed source
C2‧‧‧Second capacitor
L2‧‧‧Second inductor
600‧‧‧Wireless communication device
601‧‧‧display unit
602‧‧‧Headphone socket
603‧‧‧USB connector
607‧‧‧Speaker
610‧‧‧Circuit Board

FIG. 1 is a schematic diagram of an antenna structure applied to a wireless communication device according to a first embodiment of the present invention. FIG. 2 is an assembly diagram of the antenna structure shown in FIG. 1. FIG. 3 is a schematic diagram of the wireless communication device shown in FIG. 1 from another angle. FIG. 4 is a current trend diagram of the antenna structure shown in FIG. 2 during operation. FIG. 5 is a circuit diagram of a first matching circuit of an antenna structure according to a first embodiment of the present invention. FIG. 6 is a circuit diagram of a second matching circuit of the antenna structure of the first embodiment of the invention. FIG. 7 is a return loss curve diagram of the antenna structure during operation of the first embodiment of the invention. FIG. 8 is a return loss curve diagram of the antenna structure according to the first embodiment of the invention when it works in a low frequency band. FIG. 9 is a return loss curve diagram of the antenna structure according to the first embodiment of the invention when working with first radiators of different sizes. FIG. 10 is a return loss curve diagram of the third capacitor of the second matching circuit of the antenna structure according to the first embodiment of the present invention with different capacitance values operating. FIG. 11 is a return loss curve diagram of the antenna structure adjustment feed-in portion of the first embodiment of the present invention when it operates at different access positions. FIG. 12 is a return loss curve diagram of the antenna structure according to the first embodiment of the present invention when adjusting the different access positions of the ground portion. FIG. 13 is an efficiency curve diagram of the antenna structure according to the first embodiment of the present invention when it is operated in a low frequency band. FIG. 14 is an efficiency curve diagram of the antenna structure according to the first embodiment of the present invention when it is operating in the middle and high frequency bands. FIG. 15 is a schematic diagram of an antenna structure applied to a wireless communication device according to a second embodiment of the present invention. FIG. 16 is an assembly diagram of the antenna structure shown in FIG. 15. FIG. 17 is a schematic diagram of the wireless communication device shown in FIG. 15 from another angle. FIG. 18 is a current trend diagram of the antenna structure shown in FIG. 16 during operation. FIG. 19 is a circuit diagram of a first matching circuit of an antenna structure according to a second embodiment of the present invention. 20 is a circuit diagram of a second matching circuit of an antenna structure according to a second embodiment of the present invention. FIG. 21 is a circuit diagram of a third matching circuit with an antenna structure according to a second embodiment of the present invention. FIG. 22 is a return loss curve diagram when the second matching circuit of the antenna structure according to the second embodiment of the present invention switches to a switching element with a different inductance value to operate. FIG. 23 is a return loss curve diagram of the antenna structure according to the second embodiment of the present invention when the antenna structure is operated in an intermediate frequency band and a high frequency band. FIG. 24 is a return loss curve diagram of the antenna structure according to the second embodiment of the present invention when working with first radiators of different sizes. FIG. 25 is a return loss curve diagram of the antenna structure according to the second embodiment of the present invention when working with third radiators of different sizes. FIG. 26 is a return loss curve diagram of the antenna structure according to the second embodiment of the present invention when working with second radiators of different sizes. FIG. 27 is a diagram illustrating an efficiency curve of an antenna structure in a low frequency band according to a second embodiment of the present invention. FIG. 28 is an efficiency curve diagram of the antenna structure of the second embodiment of the present invention when operating in the intermediate frequency band. FIG. 29 is an efficiency curve diagram of the antenna structure according to the second embodiment of the present invention when operating in a high frequency band.

no

100‧‧‧ Antenna Structure

11‧‧‧ metal parts

111‧‧‧ metal front frame

1112‧‧‧First breakpoint

1114‧‧‧ Second breakpoint

12‧‧‧ radiation segment

A1‧‧‧metal long arm

A2‧‧‧ metal short arm

13‧‧‧Feeding Department

14‧‧‧ Ground

15‧‧‧ first radiator

16‧‧‧Second radiator

162‧‧‧First arm

164‧‧‧ second arm

202‧‧‧ rear dual camera

203‧‧‧ Receiver

207‧‧‧Front lens

210‧‧‧Circuit Board

Claims (29)

An antenna structure includes a metal piece, a feeding portion, and a ground portion. The metal piece includes a metal front frame, a metal back plate, and a metal frame. The metal frame is sandwiched between the metal front frame and the metal back plate. An improvement is that a slot is provided on the metal frame, a first break point and a second break point are provided on the metal front frame, and the first break point and the second break point are respectively provided in the slot. Between the two ends, the first interruption point and the second interruption point communicate with the slot and extend to cut off the metal front frame. The linear metal is located between the first interruption point and the second interruption point. The front frame forms a radiating section, and the feeding portion and the ground portion are connected to the radiating section at intervals. The antenna structure further includes a radiator, and the radiator is connected to the metal front frame near the second interruption point and is opposite At one end of the radiating section, the current is fed from the feeding section to the radiating section and flows along the radiating section to the second interruption point, and the radiator is coupled to obtain a current from the radiating section, The radiation segment and radiator Excite two different bands of radiation signal. The antenna structure according to item 1 of the scope of patent application, wherein the slot and the breakpoint are filled with an insulating material. The antenna structure according to item 1 of the scope of the patent application, wherein the metal back plate is a single metal piece integrally formed, there is no gap between the metal back plate and the metal frame, and no metal back plate is provided. Slots, breaks, or breaks for dividing the insulation of the metal backplane. The antenna structure according to item 1 of the patent application scope, wherein the antenna structure further includes a first matching circuit and a second matching circuit, one end of the feeding portion is connected to the radiating section, and the other end is passed through the first matching The circuit is electrically connected to a feed source, and the radiating section is divided into a metal long arm facing the first interruption point and a metal short arm facing the second interruption point with the feed portion as a separation point, and the length of the metal long arm is greater than The length of the metal short arm. The antenna structure according to item 4 of the scope of patent application, wherein the first matching circuit includes a first capacitor, a second capacitor, and an adjustable inductor, and the feeding section is connected to the feeding source through the first capacitor. One end of the second capacitor is electrically connected between the feeding portion and the first capacitor, and the other end is connected to the ground plane. One end of the adjustable inductor is electrically connected to the feeding portion and the other end is connected to the ground plane. The adjustable inductance is switched between a plurality of different preset inductance values. The antenna structure according to item 4 of the scope of patent application, wherein the second matching circuit includes a first inductor, a second inductor, and a third capacitor, and one end of the first inductor is electrically connected to the ground portion and the other end The third capacitor is connected to the ground plane, one end of the second inductor is electrically connected between the first inductor and the third capacitor, and the other end is connected to the ground plane. The antenna structure according to item 4 of the scope of patent application, wherein the feeding section feeds current from a feeding source through the first matching circuit, and the current flows along the short metal arm to the second interruption point and along the metal length, respectively. The arm flows to the first interruption point and flows to the ground portion and the second matching circuit at the same time to excite a first mode to generate a radiation signal in a first frequency band; the first mode includes an LTE-A low-frequency mode State and LTE-A intermediate frequency mode, the first frequency band includes LTE-A low frequency band 700-900MHz and LTE-A intermediate frequency band 1800-1900MHz. The antenna structure according to item 7 of the scope of patent application, wherein by controlling the inductance value of the adjustable inductance of the first matching circuit, the metal long arm, the metal short arm, and the feeding portion can be connected with different inductance values to Adjusting the LTE-A low frequency band in the first mode, the adjusting frequency band is to shift the frequency band toward the low frequency or the high frequency. The antenna structure according to item 7 of the scope of patent application, wherein the feeding section feeds current from a feeding source through the first matching circuit, and the current flows along the long metal arm to the first interruption point and to the first interruption point. The ground part and the second matching circuit excite a second mode to generate a radiation signal in a second frequency band, the second mode is a GPS mode, and the second frequency band is 1575 MHz. The antenna structure according to item 9 of the scope of patent application, wherein the feeding section feeds current from a feeding source through the first matching circuit, and the current flows along the short metal arm to the second interruption point to excite a first Three modes to generate a radiation signal in a third frequency band, the third mode is an LTE-A high frequency mode, and the third frequency band is 2200-2300 MHz. The antenna structure according to item 10 of the scope of patent application, wherein the radiator is a first radiator, the first radiator is generally a long metal sheet body, and the first radiator is short from the metal. The arm is coupled to obtain a current to excite a fourth mode to generate a radiation signal in the fourth frequency band, the fourth mode is an LTE-A high-frequency mode, and the fourth frequency band is 2500-2700 MHz. The antenna structure according to item 11 of the scope of patent application, wherein the antenna structure further includes a second radiator, the second radiator includes a first arm and a second arm, and the first arm is substantially L-shaped metal One end of the sheet body is connected to the metal front frame near the first interruption point and opposite to one end of the radiating section, the second arm is generally a U-shaped metal sheet body, and one end thereof is connected to the first An end of the arm far from the metal front frame. The antenna structure according to item 12 of the scope of patent application, wherein the second radiator obtains a current from the metal long arm coupling to excite a fifth mode to generate a radiation signal in a fifth frequency band, the said The fifth mode includes a WiFi 2.4G mode and a WiFi 5G mode, and the fifth frequency band includes 2450 MHz and 5500 MHz. The antenna structure according to item 11 of the scope of patent application, wherein the LTE-A high-frequency band of the fourth mode is adjusted by adjusting the size of the first radiator; Access to the position of the radiation segment to adjust the bandwidth of each frequency band. The antenna structure according to item 4 of the scope of patent application, wherein the first matching circuit includes a first capacitor and a first inductor, one end of the first capacitor is electrically connected to the feeding portion, and the other end is electrically connected to For a feed source, one end of the first inductor is electrically connected between the first capacitor and the feed portion, and the other end is connected to a ground plane. The antenna structure according to item 15 of the scope of patent application, wherein the second matching circuit includes a switching unit and at least one switching element, and the switching element is an inductor, a capacitor, or a combination of an inductor and a capacitor. They are connected in parallel with each other, and one end is electrically connected to the switching unit, and the other end is electrically connected to a ground plane. The switching unit is electrically connected between the ground portion and the switching element; by controlling the switching of the switching unit, , The radiating section can be switched to different switching elements through the grounding part, and each switching element has a different impedance. The antenna structure according to item 16 of the application, wherein the radiator is a second radiator, and the antenna structure further includes a first radiator and a third radiator, and the first radiator is connected to the radiator. The metal short arm is near one end of the second interruption point, and the first radiator and the second radiator are disposed at intervals from the second interruption point and are respectively disposed on opposite sides of the second interruption point, and the third radiation The body is connected to an end of the metal front frame near the first interruption point and opposite to the metal long arm. The antenna structure according to item 17 of the scope of patent application, wherein the feeding section feeds current from a feeding source through the first matching circuit, and the current flows to both sides of the radiating section, one of which The direction is flowing through the metal long arm, to the first interruption point, and to the ground portion and the second matching circuit, thereby exciting a first mode to generate a radiation signal in a first frequency band, the first mode It is an LTE-A low-frequency mode, and the first frequency band is a 704-960 MHz frequency band. The antenna structure according to item 18 of the scope of patent application, wherein by controlling the switching of the switching unit, the metal long arm can be switched to a different switching element to adjust the first mode of the metal long arm In the first frequency band, the adjustment of the frequency band is to shift the frequency band to a low frequency or to a high frequency. The antenna structure according to item 18 of the scope of patent application, wherein after the electric current is fed into the radiating section from the feeding section, the other direction is flowing through the metal short arm to the second interruption point, And flows through the first radiator, thereby exciting a second mode to generate a radiation signal in a second frequency band, the second mode is an LTE-A intermediate frequency mode, and the second frequency band is 1700-1900 MHz Frequency band. The antenna structure according to item 17 in the scope of patent application, wherein the second radiator obtains a current from the metal short arm coupling, and the current flows through the second radiator, thereby exciting a third mode to generate a first Radiation signals in three frequency bands, the third mode is an LTE-A intermediate frequency mode, and the third frequency band is a 1900-2200 MHz frequency band. The antenna structure according to item 17 of the scope of patent application, wherein the third radiator obtains a current from the coupling of the metal long arm, and the current flows through the third radiator, thereby exciting a fourth mode to generate a first mode. Radiation signals in four frequency bands, the fourth mode is the LTE-A high-frequency mode, and the fourth frequency band is the 2200-2500MHz frequency band. The antenna structure according to item 17 of the scope of patent application, wherein the antenna structure further includes a fourth radiator and a third matching circuit, the fourth radiator is disposed at a distance from the metal long arm, and the fourth The end of the radiator remote from the metal long arm is connected to a feed source through the third matching circuit. According to the antenna structure of claim 23, wherein the third matching circuit includes a second capacitor and a second inductor, one end of the second capacitor is electrically connected to the fourth radiator, and the other end is electrically connected to For a feed source, one end of the second inductor is electrically connected between the feed source and the second capacitor, and the other end is connected to a ground plane. The antenna structure according to claim 23, wherein the fourth radiator feeds a current from a feed source through the third matching circuit, and the current flows along the fourth radiator, thereby exciting a fifth A mode to generate a radiation signal in a fifth frequency band, the fifth mode is an LTE-A high-frequency mode, and the fifth frequency band is a 2500-2700 MHz frequency band. A wireless communication device includes the antenna structure according to any one of claims 1-14 of the scope of patent application. The wireless communication device according to item 26 of the patent application scope, wherein the wireless communication device further includes a rear dual lens, a receiver and a front lens arranged side by side at intervals, and the feeding portion is disposed at the rear dual lenses at intervals. Between the receiver and the receiver, the ground portion is disposed between the receiver and the front lens, the first radiator is disposed on a side of the rear dual lens away from the feeding portion, and the second radiator The body interval is disposed on a side of the front lens away from the ground portion. A wireless communication device includes the antenna structure according to any one of claims 15-25. The wireless communication device according to item 28 of the patent application scope, wherein the wireless communication device further includes a headphone socket, a USB connector, and a speaker arranged side by side at intervals, and the feeding portion and the ground portion are disposed at intervals between the headphone socket and Between the USB connectors; the first radiator and the second radiator are spaced apart from each other on a side of the earphone socket away from the feeding portion; the third radiator and the fourth radiator are arranged on the side Between the metal front frame and the speaker.