TWI658643B - Antenna structure and wireless communication device with same - Google Patents

Abstract

An antenna structure includes a housing, a first resonance portion, a second resonance portion, an extension portion, and a signal feed source. The housing includes a front frame, a back plate, and a frame. The frame is provided with a slot. The front frame is provided with a slot and a breakpoint, and the slot, the slot and the breakpoint collectively divide an antenna segment from the housing, and the first resonance portion is directly electrically connected to the antenna segment or is connected with the antenna segment. The antenna section is coupled and arranged at intervals, the second resonance section is electrically connected to the antenna section, the extension section is directly electrically connected to the antenna section or is coupled to the antenna section and arranged at intervals, the first resonance section And one of the second resonance parts is electrically connected to the signal feed source, and the other one is grounded.

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 have increasingly higher requirements for product appearance. Because metal casings have advantages in appearance, mechanism 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 shielding the signals radiated by the antennas arranged in it, and it is not easy to achieve a broadband design, resulting in poor radiation performance of the built-in antenna. Furthermore, the backplane is usually provided with slots and breakpoints, which will affect the integrity and aesthetics of the backplane.

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 housing, a first ground portion, a second ground portion, a coupling portion, and a first feed source. The housing includes a front frame, a back plate, and a frame, and the frame is sandwiched between the front frame. A slot is provided on the frame and the back plate, and a first slot and a first breakpoint are provided on the front frame, and the first slot and the first breakpoint are in communication with the slot. And extends to cut off the front frame, the slot, the first slot, and the first break point collectively divide a first antenna segment from the housing, and one end of the first ground portion is electrically connected to the First antenna section, the other end is connected Ground, the second ground portion is spaced from the first ground portion, and one end is electrically connected to the first antenna section and the other end is grounded, and one end of the coupling portion is electrically connected to the first feed source And coupled to the first antenna segment at intervals, and the current from the first feed source is coupled to the first antenna segment through the coupling portion.

A wireless communication device includes the antenna structure described above.

The antenna structure and the wireless communication device having the antenna structure can cover LTE-A low, medium and high frequencies, and the frequency range is wide. In addition, the slot, the first slot, the second slot, the first break point, and the second break point on the housing of the antenna structure are all disposed on the front frame and the frame, but not on the back plate. So that the backplane forms an all-metal structure, that is, the backplane has no insulation slots, breaks, or breakpoints, so that the backplane can be prevented from being affected by the settings of the slots, breaks, or breakpoints The integrity and aesthetics of the backplane.

100, 100a, 300, 500‧‧‧ antenna structure

11, 31, 51‧‧‧ shell

111, 311, 511‧‧‧ front frame

112, 312, 512‧‧‧ backplane

113, 313, 513‧‧‧ border

114, 314, 514‧‧‧ accommodation space

525‧‧‧Containment space

115, 315, 515‧‧‧

116, 316, 516‧‧‧ first side

117, 317, 517‧‧‧ Second side

118‧‧‧The first opening

119‧‧‧Second opening

120, 320, 520‧‧‧ slotted

121, 321, 521‧‧‧‧ the first gap

122, 322, 522‧‧‧Second Gap

123, 323, 523‧‧‧‧First breakpoint

124, 324, 524‧‧‧ Second breakpoint

A1‧‧‧First antenna section

E1, K1‧‧‧antenna section

K11‧‧‧ first paragraph

K12‧‧‧ second paragraph

A2‧‧‧Second antenna section

12‧‧‧ the first ground

G1‧‧‧First grounding section

126 、 J1‧‧‧First connection

13‧‧‧Second Grounding Section

G2‧‧‧Second Grounding Section

131 、 J2‧‧‧Second connection section

T1, D1, H1‧‧‧ first end

T2, D2, H2‧‧‧ second end

14‧‧‧Coupling Department

F1‧‧‧First feed

141‧‧‧First coupling section

143‧‧‧Second coupling section

15‧‧‧ Parasite

G3‧‧‧ third ground section

151‧‧‧The first parasitic segment

153‧‧‧Second Parasitic Section

S1‧‧‧First feed source

S2‧‧‧Second feed source

36, 56‧‧‧ signal feed source

ANT1‧‧‧First antenna

ANT2‧‧‧Second Antenna

ANT3, ANT4‧‧‧ Antenna

16‧‧‧ Radiation Department

33‧‧‧First Radiation Department

F2‧‧‧second feed

G4‧‧‧The fourth grounding section

161, 331‧‧‧ first radiation segment

163, 332‧‧‧ second radiation segment

333‧‧‧ third radiation segment

334‧‧‧Fourth Radiation Segment

335‧‧‧ fifth radiation segment

53‧‧‧First resonance section

Q1‧‧‧First connecting arm

531‧‧‧First resonance section

532‧‧‧Second resonance section

54‧‧‧Second resonance section

Q2‧‧‧Second connecting arm

541‧‧‧Resonant Arm

55‧‧‧ extension

551‧‧‧first extension

552‧‧‧second extension

17, 27, 37, 57‧‧‧ matching circuits

171, 271, 371, 571‧‧‧ first matching element

172, 272, 372, 572‧‧‧Second matching element

173, 273, 373, 573‧‧‧ third matching element

177‧‧‧Fourth matching element

18‧‧‧ switching circuit

181‧‧‧first switching element

183‧‧‧Second switching element

19, 29‧‧‧ filter circuit

L1‧‧‧Inductance

C1‧‧‧first capacitor

C2‧‧‧Second capacitor

L2‧‧‧First inductor

L3‧‧‧Second inductor

C3‧‧‧Capacitor

200, 400, 600‧‧‧ wireless communication devices

201, 401, 601‧‧‧ display units

202, 402, 602‧‧‧‧The first electronic component

203, 403, 603‧‧‧Second electronic components

204, 404, 604‧‧‧ Third electronic component

205, 405, 605‧‧‧ Fourth electronic component

206, 406, 606‧‧‧ fifth electronic component

207, 208, 209, 407, 408, 409, 607, 608, 609‧‧‧through hole

34‧‧‧Second Radiation Department

341‧‧‧The first radiation arm

342‧‧‧Second Radiation Arm

343‧‧‧ Third Radiation Arm

344‧‧‧ Fourth Radiation Arm

345‧‧‧Fifth Radiation Arm

35‧‧‧Third Radiation Department

J3‧‧‧ the third connection

351‧‧‧First resonance section

352‧‧‧Second resonance section

353‧‧‧The third resonance section

354‧‧‧Fourth resonance section

355‧‧‧Fifth resonance section

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

FIG. 2 is a schematic diagram of the wireless communication device shown in FIG. 1 from another angle.

FIG. 3 is an assembly diagram of the wireless communication device shown in FIG. 1.

FIG. 4 is a schematic diagram of a current trend of the antenna structure shown in FIG. 1.

FIG. 5 is a circuit diagram of the antenna structure shown in FIG. 1 provided with a matching circuit.

FIG. 6 is a circuit diagram of the antenna structure shown in FIG. 1 provided with a switching circuit and a filter circuit.

FIG. 7 is a graph of S parameters (scattering parameters) of the antenna structure when the first matching element in the antenna structure shown in FIG. 5 is set to different inductance values.

FIG. 8 is a graph of S parameters (scattering parameters) of the antenna structure when the second matching element in the antenna structure shown in FIG. 5 is set to a different capacitance value.

FIG. 9 is a graph of S parameters (scattering parameters) of the antenna structure when the third matching element in the antenna structure shown in FIG. 5 is set to a different inductance value.

FIG. 10 is a graph of S parameters (scattering parameters) of the antenna structure when the fourth matching element in the antenna structure shown in FIG. 5 is set to different inductance values.

FIG. 11 is a graph of S parameters (scattering parameters) of the antenna structure when the matching circuit in the antenna structure shown in FIG. 5 is provided with a specific inductance and capacitance.

FIG. 12 is a graph of the radiation efficiency of the antenna structure when the matching circuit in the antenna structure shown in FIG. 5 is provided with a specific inductance and capacitance.

FIG. 13 shows the S parameter (scattering parameter) of the antenna structure when the first switching element in the antenna structure shown in FIG. 6 is set as an inductor with a different inductance value, and the second switching element is an inductor with an inductance value of 5 nH. Graph.

FIG. 14 is the S parameter (scattering parameter) of the antenna structure when the first switching element in the antenna structure shown in FIG. 6 is set as an inductor with a different inductance value, and the second switching element is an inductor with an inductance value of 10 nH. Graph.

FIG. 15 shows the S-parameters (scattering parameters) of the antenna structure when the first switching element in the antenna structure shown in FIG. 6 is set as an inductor with a different inductance value, and the second switching element is an inductor with an inductance value of 15 nH. Graph.

FIG. 16 is a graph of S parameters (scattering parameters) of the second antenna in the antenna structure shown in FIG. 1.

FIG. 17 is a graph of the radiation efficiency of the second antenna in the antenna structure shown in FIG. 1. FIG.

FIG. 18 is a graph of the total radiation efficiency of the second antenna in the antenna structure shown in FIG. 1.

FIG. 19 is a schematic diagram of an antenna structure in a second preferred embodiment of the present invention.

FIG. 20 is a circuit diagram of the antenna structure shown in FIG. 19 provided with a matching circuit.

FIG. 21 is a circuit diagram of the antenna structure shown in FIG. 19 provided with a switching circuit and a filter circuit.

FIG. 22 is a graph of S parameters (scattering parameters) of the first antenna in the antenna structure shown in FIG. 19.

FIG. 23 is a radiation efficiency graph of a first antenna in the antenna structure shown in FIG. 19.

FIG. 24 is a graph of S parameters (scattering parameters) of the second antenna in the antenna structure shown in FIG. 19.

FIG. 25 is a radiation efficiency curve diagram of the second antenna in the antenna structure shown in FIG. 19.

FIG. 26 is a graph of the total radiation efficiency of the second antenna in the antenna structure shown in FIG. 19.

FIG. 27 is a schematic diagram of an antenna structure applied to a wireless communication device according to a third preferred embodiment of the present invention.

FIG. 28 is a schematic diagram of the wireless communication device shown in FIG. 27 from another angle.

FIG. 29 is an assembly diagram of the wireless communication device shown in FIG. 27.

FIG. 30 is a schematic plan view of the antenna structure shown in FIG. 27.

FIG. 31 is a schematic diagram of a current flow when the antenna structure shown in FIG. 27 is operated in the 734-960MHz frequency band and the 2500-2690MHz frequency band.

FIG. 32 is a schematic diagram of a current flow when the antenna structure shown in FIG. 27 operates in a frequency band of 1805-2300MHz.

FIG. 33 is a circuit diagram of the antenna structure shown in FIG. 27 provided with a matching circuit.

FIG. 34 is a graph of S parameters (scattering parameters) of the antenna structure when the first matching element in the antenna structure shown in FIG. 33 is set to different inductance values.

FIG. 35 is a graph of S parameters (scattering parameters) of the antenna structure when the second matching element in the antenna structure shown in FIG. 33 is set to a different capacitance value.

FIG. 36 is a graph of S parameters (scattering parameters) of the antenna structure when the third matching element in the antenna structure shown in FIG. 33 is set to a different inductance value.

FIG. 37 is a graph of S-parameters (scattering parameters) when the antenna structure shown in FIG. 27 is operated in a low-frequency mode.

FIG. 38 is a graph of S-parameters (scattering parameters) of the antenna structure shown in FIG. 27 when it is operated in the middle and high-frequency modes.

FIG. 39 is a radiation efficiency curve diagram of the antenna structure shown in FIG. 27 when the antenna structure is operated in a low frequency mode.

FIG. 40 is a graph of the total radiation efficiency of the antenna structure shown in FIG. 27 when it is operated in a low frequency mode.

FIG. 41 is a radiation efficiency curve diagram of the antenna structure shown in FIG. 27 when it is operated in the middle and high frequency modes.

FIG. 42 is a graph of the total radiation efficiency of the antenna structure shown in FIG. 27 when it is operated in the middle and high frequency modes.

43a to 43h are schematic plan views of the antenna structure shown in FIG. 27.

FIG. 44 is a schematic diagram of an antenna structure applied to a wireless communication device according to a fourth preferred embodiment of the present invention.

FIG. 45 is a schematic diagram of the wireless communication device shown in FIG. 44 from another angle.

FIG. 46 is an assembly diagram of the wireless communication device shown in FIG. 44.

FIG. 47 is a schematic plan view of the antenna structure shown in FIG. 44.

FIG. 48 is a schematic diagram of a current trend of the antenna structure shown in FIG. 44.

FIG. 49 is a circuit diagram of the antenna structure shown in FIG. 44 provided with a matching circuit.

FIG. 50 is a graph of S parameters (scattering parameters) of the antenna structure when the extensions in the antenna structure shown in FIG. 44 have different lengths.

FIG. 51 is a graph of S parameters (scattering parameters) of the antenna structure when the second matching element in the antenna structure shown in FIG. 44 is set to a different capacitance value.

FIG. 52 is a graph of S parameters (scattering parameters) of the antenna structure when the third matching element in the antenna structure shown in FIG. 44 is set to a different capacitance value.

FIG. 53 is a graph of S parameters (scattering parameters) of the antenna structure shown in FIG. 44.

FIG. 54 is a graph of radiation efficiency of the antenna structure shown in FIG. 44.

55a to 55f are schematic plan views of the antenna structure shown in FIG. 44.

In the following, the technology in the embodiment of the present invention will be described with reference to the drawings in the embodiment of the present invention. The technical scheme is clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those with ordinary knowledge in the art without any creative labor belong to the protection scope of the present invention.

It should be noted that when an 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 method, or a non-contact connection method, for example, a non-contact coupling method.

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. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the term "and / or" 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 1-2

Referring to FIG. 1, a 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. 2 together. The antenna structure 100 includes a housing 11, a first ground portion 12, a second ground portion 13, a coupling portion 14, a parasitic portion 15, a radiating portion 16, a first feed source S1, and a second Feed source S2. The casing 11 may be a casing of the wireless communication device 200. In this embodiment, the casing 11 is made of a metal material. The casing 11 includes a front frame 111, a back plate 112 and a frame 113. The front frame 111, the back plate 112, and the frame 113 may be integrally formed. Said front frame 111, back The plate 112 and the frame 113 constitute a casing of the wireless communication device 200. The 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 back plate 112.

The back plate 112 is opposite to the front frame 111. The back plate 112 is directly connected to the frame 113, and there is no gap between the back plate 112 and the frame 113. The back plate 112 is equivalent to a place where the antenna structure 100 and the wireless communication device 200 are located.

The frame 113 is sandwiched between the front frame 111 and the back plate 112, and is disposed around the periphery of the front frame 111 and the back plate 112, respectively, so as to communicate with the display unit 201 and the front plate. The frame 111 and the 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 and a processing unit of the wireless communication device 200 therein.

The frame 113 includes at least a tip portion 115, a first side portion 116, and a second side portion 117. In this embodiment, the end portion 115 is a bottom end of the wireless communication device 200. The end portion 115 connects the front frame 111 and the back plate 112. The first side portion 116 and the second side portion 117 are disposed opposite to each other, and the two are disposed at both ends of the end portion 115 respectively, and are preferably disposed vertically. The first side portion 116 and the second side portion 117 are also connected to the front frame 111 and the back plate 112.

The frame 113 is further provided with a first opening 118, a second opening 119 and a slot 120. The front frame 111 is provided with a first slit 121, a second slit 122, a first break point 123, and a second break point 124. The first openings 118 and the second openings 119 are both formed in the end portion 115, and the two are spaced apart and both penetrate the end portion 115.

Please refer to FIG. 3 together. The wireless communication device 200 further includes at least one electronic component. In this embodiment, the wireless communication device 200 includes a first electronic component 202 and a second electrical component. The sub-element 203, the third electronic element 204, the fourth electronic element 205, and the fifth electronic element 206 (see FIG. 3). The first electronic component 202 is a headphone interface module, which is disposed in the accommodation space 114 and is disposed adjacent to the first side portion 116. The first electronic component 202 corresponds to the first opening 118, so that the first electronic component 202 is partially exposed from the first opening 118. In this way, the user can insert an earphone through the first opening 118 to establish an electrical connection with the first electronic component 202.

The second electronic component 203 is a USB module, which is disposed in the accommodating space 114 and is located between the first electronic component 202 and the second side portion 117. The second electronic component 203 corresponds to the second opening 119, so that the second electronic component 203 is partially exposed from the second opening 119. In this way, the user can insert a USB device through the second opening 119 to establish an electrical connection with the second electronic component 203. The third electronic component 204 and the fourth electronic component 205 are both rear camera modules. The fifth electronic component 206 is a flash.

The back plate 112 is a single metal sheet integrally formed to expose components such as a dual camera lens (ie, the third electronic component 204 and the fourth electronic component 205) and a flash (ie, the fifth electronic component 206). The back plate 112 Through holes 207, 208, and 209 are provided. The back plate 112 is not provided with any slot, break or break point for dividing the insulation of the back plate 112.

In this embodiment, the slot 120 is disposed on the end portion 115, communicates with the first opening 118 and the second opening 119, and extends to the first side portion 116 and the first side portion 116, respectively. Two sides 117. It can be understood that, in other embodiments, the slot 120 may be provided only at the end portion 115 without extending to any one of the first side portion 116 and the second side portion 117, or the The slot 120 is disposed on the end portion 115 and extends to only one of the first side portion 116 and the second side portion 117.

The first gap 121, the second gap 122, the first break point 123, and the second break point 124 are in communication with the slot 120 and extend to block the front frame 111. In this embodiment, the first slit 121 is opened on the front frame 111 and communicates with the first end T1 of the slot 120 disposed on the first side portion 116. The second slot 122 is formed on the front frame 111 and communicates with the second end T2 of the slot 120 disposed on the second side portion 117. The first breakpoint 123 and the second breakpoint 124 are disposed on the front frame 111 between the first end T1 and the second end T2 at intervals, and communicate with the slot 120. In this way, the slot 120, the first slot 121, the second slot 122, the first breakpoint 123, and the second breakpoint 124 collectively separate at least the first antenna section A1 and the first antenna section spaced from the housing 11 together. Two antenna segments A2. Wherein, the front frame 111 between the first slot 121 and the first break point 123 constitutes the first antenna segment A1. The front frame 111 between the second slot 122 and the second break point 124 constitutes the second antenna segment A2. In this embodiment, the first breakpoint 123 and the second breakpoint 124 are respectively disposed on both sides of the second opening 119.

It can be understood that, in this embodiment, in addition to the positions of the first opening 118 and the second opening 119, the slot 120, the first gap 121, the second gap 122, the first break point 123, and the first The two breakpoints 124 are filled with insulating materials (such as plastic, rubber, glass, wood, ceramic, etc., but not limited to this).

It can be understood that, in this embodiment, the slot 120 is opened at one end of the frame 113 near the back plate 112 and extends to the front frame 111 so that the first antenna section A1 and the second antenna section A1 The antenna section A2 is completely composed of part of the front frame 111. Of course, in other embodiments, the opening position of the slot 120 may be adjusted according to specific requirements. For example, the slot 120 is opened at one end of the frame 113 near the back plate 112 and extends in a direction where the front frame 111 is located, so that the first antenna section A1 and the second antenna section A2 are partially formed. The front frame 111 and a part of the frame 113 are formed.

It can be understood that in addition to the slot 120, the lower half of the front frame 111 and the frame 113 There are no other slots, breaks or breakpoints for insulation other than the first slot 121, the second slot 122, the first break point 123 and the second break point 124, so the lower half of the front frame 111 is only The first gap 121, the second gap 122, the first break point 123, and the second break point 124 have no other break points.

It can be understood that, in this embodiment, the width of the slot 120 is approximately 3.43 mm. The width of the first break point 123 and the second break point 124 is approximately 2 mm. The width of the first slit 121 and the second slit 122 is approximately 3.43 mm. The distance between the first break point 123 and the second break point 124 is approximately 11.1 mm.

The first ground portion 12 is disposed on one side of the first electronic component 202 near the first break point 123. The first ground portion 12 is substantially L-shaped and includes a first ground section G1 and a first connection section 126. The first ground segment G1 is substantially rectangular strip-shaped and is disposed in a plane perpendicular to the back plate 112. One end of the first ground segment G1 is vertically connected to the first connection segment 126, and the other end is electrically connected to the back plate 112, that is, grounded. The first connecting section 126 is substantially a rectangular strip, and is disposed in a plane parallel to the back plate 112 as a whole. One end of the first connection segment 126 is vertically connected to one end of the first ground segment G1 away from the back plate 112, and the other end extends in a direction parallel to the first side portion 116 and close to the end portion 115. Until it is connected to the first antenna section A1, so that the first antenna section A1 is grounded by the first grounding portion 12.

The second ground portion 13 is disposed on one side of the first electronic component 202 near the first side portion 116. The second ground portion 13 is substantially L-shaped, and includes a second ground portion G2 and a second connection portion 131. The second ground segment G2 is substantially rectangular strip-shaped and is disposed in a plane perpendicular to the back plate 112. One end of the second ground segment G2 is electrically connected to the second connection segment 131, and the other end is electrically connected to the back plate 112, that is, grounded. The second connection section 131 is substantially a rectangular strip, and is disposed in a plane parallel to the back plate 112 as a whole. One end of the second connection section 131 is vertically connected to one end of the second ground section G2 away from the back plate 112, and the other The end extends in a direction parallel to the first side portion 116 and close to the end portion 115 until it is connected to the first antenna section A1, so that the first antenna section A1 passes through the second ground section 13 Ground.

The first ground portion 12 and the second ground portion 13 are both close to the first opening 118. The first grounding portion 12 and the second grounding portion 13 are respectively disposed on two sides of the first opening 118.

The coupling portion 14 is electrically connected to the first feed source S1 to form a monopole antenna. The coupling section 14 includes a first feeding section F1, a first coupling section 141, and a second coupling section 143. The first feeding section F1 is disposed between the first electronic component 202 and the second electronic component 203. The first feeding section F1 has a substantially rectangular strip shape, and is disposed in a plane perpendicular to the back plate 112. One end of the first feeding section F1 is electrically connected to the first coupling section 141, and the other end is electrically connected to the first feeding source S1 to feed current to the coupling section 14.

The first coupling section 141 has a substantially rectangular strip shape and is disposed in a plane parallel to the back plate 112. One end of the first coupling section 141 is vertically connected to one end of the first feeding section F1 away from the first feeding source S1, and the other end is parallel to the first side portion 116 and close to the end portion 115. Extending in the direction. The second coupling section 143 is coplanar with the first coupling section 141. The second coupling section 143 is vertically connected to an end of the first coupling section 141 away from the first feeding section F1, and is parallel to the end section 115 and close to the first side section 116 and the first section, respectively. The two side portions 117 extend in a direction, and further form a T-shaped structure with the first coupling section 141.

The parasitic portion 15 is a parasitic antenna. The parasitic portion 15 is disposed between the first coupling section 141 and the second electronic component 203. The parasitic portion 15 includes a third grounding segment G3, a first parasitic segment 151, and a second parasitic segment 153. The third ground segment G3 is substantially a rectangular strip, and is disposed in a plane perpendicular to the back plate 112. One end of the third ground segment G3 is vertically connected to the first parasitic segment 151, and the other end is electrically connected to the back plate 112, that is, grounded. The first parasitic section 151 is substantially a rectangular strip, one end of which is vertically connected to the third ground section G3 away from One end and the other end of the back plate 112 extend parallel to the second coupling section 143 and close to the second electronic component 203 (that is, close to the second side portion 117). The second parasitic section 153 is substantially a rectangular strip, which is vertically connected to one end of the first parasitic section 151 away from the third ground section G3, and parallel to the first side portion 116 and away from the end. The direction of the portion 115 extends.

Please refer to FIG. 4 and FIG. 5 together. It can be understood that, in this embodiment, the first antenna section A1, the first ground portion 12, the second ground portion 13, the coupling portion 14, and the parasitic portion 15 together constitute a first The antenna ANT1 is used for exciting a first mode to generate a radiation signal in a first frequency band. In this embodiment, the first mode is an LTE-A medium and high frequency mode. The first frequency band is a band of 1710-2690 MHz. For details, please refer to FIG. 4 together. When the current enters from the first feed source S1, the current will flow into the coupling section 14 and be coupled to the first antenna section A1 through the coupling section 14 to Flows through the first antenna section A1 and is grounded through the first ground section 12 and the second ground section 13 so that the coupling section 14 and the first antenna section A1 are separated by a quarter The wavelength mode collectively excites the first mode intermediate frequency band, that is, the 1710-2300 MHz frequency band. At the same time, the coupling part 14 and a part of the first antenna segment A1 also excite the first high-frequency band of the first mode, that is, the 2300-2400MHz band (see path I1) in a quarter-wave manner. In addition, when a current enters from the first feed source S1, the current will flow into the coupling portion 14 and be coupled to the parasitic portion 15 through the coupling portion 14 and through the parasitic portion 15 The third grounding segment G3 is grounded (see path I2), so that the parasitic part 15 excites the second high frequency band of the first mode, that is, the 2500-2690 MHz frequency band in a quarter-wavelength manner. Obviously, in this embodiment, the parasitic portion 15 is mainly used to improve the high-bandwidth of the first antenna ANT1.

Please refer to FIG. 2 again, the radiation portion 16 is disposed between the second electronic component 203 and the second side portion 117 as a whole. The radiating portion 16 includes a second feeding section F2, a fourth grounding section G4, a first radiating section 161, and a second radiating section 163. The second feeding section F2 is substantially rectangular The strip is disposed in a plane perpendicular to the back plate 112 and is disposed adjacent to the second side portion 117. One end of the second feeding section F2 is electrically connected to the second feeding source S2, and the other end is electrically connected to the first radiating section 161 for feeding current to the radiating section 16.

The fourth ground segment G4 is substantially rectangular strip-shaped, is disposed in a plane perpendicular to the back plate 112, and is located between the second feeding segment F2 and the second electronic component 203. One end of the fourth grounding segment G4 is electrically connected to the back plate 112, that is, grounded, and the other end is electrically connected to the first radiation segment 161 to provide grounding for the radiation portion 16.

The first radiating section 161 is substantially a rectangular strip, and is disposed in a plane parallel to the back plate 112. One end of the first radiating section 161 is vertically connected to one end of the second feeding section F2 away from the second feeding source S2, and runs parallel to the end portion 115 and near the first side portion 116. Extending a distance in a direction to be perpendicularly connected to one end of the fourth ground segment G4 away from the back plate 112, and then passing over the fourth ground segment G4 to continue parallel to the end portion 115 and close to the first The side portion 116 extends in the direction. The second radiating section 163 is substantially in a rectangular strip shape, and is disposed on the same plane as the first radiating section 161. One end of the second radiating section 163 is vertically connected to one end of the first radiating section 161 far from the second feeding section F2, and the other end is parallel to the first side portion 116 and close to the end portion 115. Extending in a direction until it is electrically connected to one side of the second antenna segment A2 adjacent to the second break point 124.

Please refer to FIG. 4 and FIG. 6 together. It can be understood that, in this embodiment, the radiating portion 16 and the second antenna section A2 together form a second antenna ANT2 for exciting the second mode to generate Radiation signal in the second frequency band. The frequency of the first frequency band is higher than the frequency of the second frequency band. In this embodiment, the second antenna ANT2 is an inverted-F antenna. The second mode is an LTE-A low-frequency mode, and the second frequency band is a 700-960 MHz frequency band. For details, please refer to FIG. 4 again. After the current enters from the second feed source S2, the current will flow into the radiating portion 16 and then flow into the second antenna section A2 through the radiating portion 16 to flow The second antenna section A2, and by the The fourth grounding section G4 of the radiating section 16 is grounded (see path I3), and then the low-frequency mode is excited to generate a radiation signal in the 700-960MHz frequency band.

Understandably, please refer to FIG. 5 again. In this embodiment, the first antenna ANT1 constitutes a four-port network. The four ports include a first grounding segment G1, a second grounding segment G2, a third grounding segment G3, and a first feeding segment F1, and corresponding matching elements are provided at each port to form a corresponding matching circuit 17, Furthermore, the bandwidth and impedance matching of the first antenna ANT1 can be effectively adjusted and optimized. Specifically, in one embodiment, the matching circuit 17 includes a first matching element 171, a second matching element 172, a third matching element 173, and a fourth matching element 174. One end of the first matching element 171 is electrically connected to the first feeding section F1, and the other end is electrically connected to the first feeding source S1. The other end of the first feed-in source S1 is electrically connected to the backplane 112, that is, grounded. One end of the second matching element 172 is electrically connected to the first ground segment G1, and the other end is electrically connected to the back plate 112, that is, grounded. One end of the third matching element 173 is electrically connected to the second ground segment G2, and the other end is electrically connected to the back plate 112, that is, grounded. One end of the fourth matching element 174 is electrically connected to the third ground segment G3, and the other end is electrically connected to the back plate 112, that is, grounded. In this embodiment, the first matching element 171, the third matching element 173, and the fourth matching element 174 are all inductors. The second matching element 172 is a capacitor. Of course, in other embodiments, the first matching element 171, the second matching element 172, the third matching element 173, and the fourth matching element 174 are not limited to the above-mentioned inductors and capacitors, but may be other Matching elements or combinations thereof.

Understandably, please refer to FIG. 6 again. In this embodiment, the second antenna ANT2 constitutes a two-port network. The two ports include a second feeding section F2 and a fourth ground section G4, and corresponding switching elements are provided at each port to form a corresponding switching circuit 18, thereby effectively adjusting the low frequency of the second antenna ANT2. Modal. Specifically, in one embodiment, the switching circuit 18 includes a first switching element 181 and a second switching element 183. The first switching element One end of the piece 181 is electrically connected to the second feeding section F2, and the other end is electrically connected to the second feeding source S2. The other end of the second feed source S2 is electrically connected to the backplane 112, that is, grounded. One end of the second switching element 183 is electrically connected to the fourth ground section G4, and the other end is electrically connected to the back plate 112, that is, grounded. In this embodiment, the first switching element 181 and the second switching element 183 are both adjustable inductors, and can be switched among a plurality of preset inductance values. In this way, the inductance values of the adjustable first switching element 181 and the second switching element 183 are set so that the switching circuit 18 constitutes a double switching circuit, thereby effectively adjusting the low-frequency mode of the second antenna ANT2. state. It can be understood that, in other embodiments, the first switching element 181 and the second switching element 183 are not limited to the adjustable inductors described above, and may also be other switching elements or combinations thereof, such as the first Both a switching element 181 and a second switching element 183 can be switched among a plurality of preset impedance values.

It can be understood that, in other embodiments, the second antenna ANT2 may further include a filter circuit 19. The filter circuit 19 is electrically connected between the first switching element 181 and the second feed source S2, so as to effectively suppress high-frequency harmonic modes, thereby effectively improving the first antenna ANT1 and all The isolation between the second antennas ANT2 is described. In one embodiment, the filter circuit 19 includes an inductor L1, a first capacitor C1, and a second capacitor C2. The inductor L1 is connected in series between the first switching element 181 and the second feed source S2. One end of the first capacitor C1 is electrically connected between the inductor L1 and the second feed source S2, and the other end is electrically connected to the backplane 112, that is, grounded. One end of the second capacitor C2 is electrically connected between the inductor L1 and the first switching element 181, and the other end is electrically connected to the back plate 112, that is, grounded to connect the inductor L1 and the first capacitor. C1 constitutes a Π-type filter circuit. In this embodiment, the inductance value of the inductance L1 is 9.1 nH. The capacitances of the first capacitor C1 and the second capacitor C2 are both 4 pF.

It can be understood that the back plate 112 can be used as a place for the antenna structure 100 and the wireless communication device 200. In another embodiment, the display unit 201 faces the back plate 112 That side may be provided with a shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 201. The shielding cover or the middle frame is made of a metal material. The shield cover or the middle frame can be connected to the back plate 112 to serve as a place for the antenna structure 100 and the wireless communication device 200. At each of the above grounds, the shield cover or middle frame can replace the back plate 112 for grounding the antenna structure 100 or the wireless communication device 200. In another embodiment, the main circuit board of the wireless communication device 200 may be provided with a ground plane, which is grounded at each of the above locations. The ground plane may replace the backplane 112 for the antenna structure 100 or the antenna structure 100. The wireless communication device 200 is grounded. The ground plane may be connected to the shield cover, the middle frame, or the back plate 112.

FIG. 7 is a graph of S parameters (scattering parameters) of the first antenna ANT1 when the first matching element 171 is an inductor and is set to a different inductance value. The curve S71 is the S11 value of the first antenna ANT1 when the first matching element 171 is an inductor with an inductance value of 2.1 nH. The curve S72 is the S11 value of the first antenna ANT1 when the first matching element 171 is an inductor having an inductance value of 1.5 nH. The curve S73 is the S11 value of the first antenna ANT1 when the first matching element 171 is an inductor with an inductance value of 2.7 nH.

FIG. 8 is a graph of S parameters (scattering parameters) of the first antenna ANT1 when the second matching element 172 is a capacitor and is set to a different capacitance value. The curve S81 is the S11 value of the first antenna ANT1 when the second matching element 172 is a capacitor having a capacitance value of 30 pF. The curve S82 is the S11 value of the first antenna ANT1 when the second matching element 172 is a capacitor having a capacitance value of 10 pF. The curve S83 is the S11 value of the first antenna ANT1 when the second matching element 172 is a capacitor having a capacitance value of 50 pF.

FIG. 9 is a graph of S parameters (scattering parameters) of the first antenna ANT1 when the third matching element 173 is an inductor and is set to a different inductance value. The curve S91 is the S11 value of the first antenna ANT1 when the third matching element 173 is an inductor with an inductance value of 8.2 nH. The curve S92 is when the third matching element 173 has an inductance value of 6.2nH. The S11 value of the first antenna ANT1 is the inductance. The curve S93 is the S11 value of the first antenna ANT1 when the third matching element 173 is an inductor with an inductance value of 10.2 nH.

FIG. 10 is a graph of S parameters (scattering parameters) of the first antenna ANT1 when the fourth matching element 174 is an inductor and is set to a different inductance value. The curve S101 is the S11 value of the first antenna ANT1 when the fourth matching element 174 is an inductor with an inductance value of 3.6 nH. The curve S102 is the S11 value of the first antenna ANT1 when the fourth matching element 174 is an inductor with an inductance value of 3.3 nH. The curve S103 is the S11 value of the first antenna ANT1 when the fourth matching element 174 is an inductor with an inductance value of 3.9 nH.

Obviously, as can be seen from FIG. 7 to FIG. 10, the second matching element 172 and the third matching element 173 in the antenna structure 100 are mainly used to adjust the first mode intermediate frequency band, that is, the 1710-2300 MHz frequency band. The first matching element 171 is configured to adjust a first high frequency band of the first mode, that is, a 2300-2400 MHz frequency band. The fourth matching element 174 is used to adjust the second high frequency band of the first mode, that is, the 2500-2690 MHz frequency band.

FIG. 11 shows that when the first matching element 171, the second matching element 172, the third matching element 173, and the fourth matching element 174 in the matching circuit 17 are inductors having an inductance value of 2.1 nH and a capacitance value of 30 pF, respectively When the capacitance, inductance is 8.2 nH, and inductance is 3.6 nH, the S parameter (scattering parameter) curve of the first antenna ANT1.

FIG. 12 shows that when the first matching element 171, the second matching element 172, the third matching element 173, and the fourth matching element 174 in the matching circuit 17 are inductors having an inductance value of 2.1 nH and a capacitance value of 30 pF, respectively When the capacitance, inductance is 8.2 nH and inductance is 3.6 nH, the radiation efficiency curve of the first antenna ANT1. The curve S121 is the radiation efficiency of the first antenna ANT1. The curve S122 is the total radiation efficiency of the first antenna ANT1. Obviously, the high frequency of the first antenna ANT1 can cover 1710-2690MHz, and its antenna efficiency is greater than -3dB in the effective frequency band, which meets the design requirements of the antenna.

FIG. 13 shows the S parameter (scattering) of the second antenna ANT2 when the first switching element 181 is set as an inductor with a different inductance value, and the second switching element 183 is an inductor with an inductance value of 5 nH. Parameter) graph. The curve S131 is the S11 value of the second antenna ANT2 when the first switching element 181 is short-circuited and the second switching element 183 is an inductor with an inductance value of 5 nH. The curve S132 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are both inductors with an inductance value of 5 nH. The curve S133 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 10 nH and 5 nH, respectively. The curve S134 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 20 nH and 5 nH, respectively. The curve S135 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 30 nH and 5 nH, respectively.

FIG. 14 is the S-parameter (scattering) of the second antenna ANT2 when the first switching element 181 is set as an inductor with a different inductance value, and the second switching element 183 is an inductor with an inductance value of 10 nH. Parameter) graph. The curve S141 is the S11 value of the second antenna ANT2 when the first switching element 181 is short-circuited and the second switching element 183 is an inductor with an inductance value of 10 nH. The curve S142 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 5 nH and 10 nH, respectively. The curve S143 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are both inductors with an inductance value of 10 nH. The curve S144 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 20 nH and 10 nH, respectively. The curve S145 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 30 nH and 10 nH, respectively.

FIG. 15 shows the second antenna ANT2 when the first switching element 181 is set as an inductor having a different inductance value, and the second switching element 183 is an inductance having an inductance value of 15 nH. The S-parameter (scattering parameter) curve. The curve S151 is the S11 value of the second antenna ANT2 when the first switching element 181 is short-circuited and the second switching element 183 is an inductor with an inductance value of 15 nH. The curve S152 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 5 nH and 15 nH, respectively. The curve S153 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 10 nH and 15 nH, respectively. The curve S154 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 20 nH and 15 nH, respectively. The curve S155 is the S11 value of the second antenna ANT2 when the first switching element 181 and the second switching element 183 are inductors with inductance values of 30 nH and 15 nH, respectively.

Obviously, as can be seen from the above FIGS. 13 to 15, the second antenna ANT2 of the antenna structure 100 mainly adjusts the frequency band (700/850 / 900MHz) of the second antenna ANT2 by the second switching element 183. Then, the first switching element 181 finely adjusts the frequency point of the second antenna ANT2 to match the impedance.

Please refer to Table 1 together, for the working frequency band of the second antenna ANT2 in the antenna structure 100 when the switching circuit 18 adopts different configurations.

FIG. 16 is a graph of S parameters (scattering parameters) of the second antenna ANT2 in the antenna structure 100. The curve S161 is the S11 value when the second antenna ANT2 operates at 704-746MHz (LTE-A band17). Curve S162 is that the second antenna ANT2 works at 746-787MHz (LTE-A band13). The curve S163 is the S11 value when the second antenna ANT2 operates at 824-894MHz (LTE-A band5). The curve S164 is the S11 value when the second antenna ANT2 operates at 880-960MHz (LTE-A band8).

FIG. 17 is a radiation efficiency curve diagram of the second antenna ANT2 in the antenna structure 100. The curve S171 is the radiation efficiency when the second antenna ANT2 operates at 704-746MHz (LTE-A band17). The curve S172 is the radiation efficiency when the second antenna ANT2 operates at 746-787MHz (LTE-A band13). Curve S173 is the radiation efficiency when the second antenna ANT2 operates at 824-894MHz (LTE-A band5). The curve S174 is the radiation efficiency when the second antenna ANT2 operates at 880-960MHz (LTE-A band8).

FIG. 18 is a graph of the total radiation efficiency of the second antenna ANT2 in the antenna structure 100. The curve S181 is the total radiation efficiency when the second antenna ANT2 operates at 704-746MHz (LTE-A band17). The curve S182 is the total radiation efficiency when the second antenna ANT2 operates at 746-787 MHz (LTE-A band13). The curve S183 is the total radiation efficiency when the second antenna ANT2 operates at 824-894MHz (LTE-A band5). The curve S184 is the total radiation efficiency when the second antenna ANT2 operates at 880-960MHz (LTE-A band8).

Obviously, as can be seen from FIG. 16 to FIG. 18, the low frequency of the antenna structure 100 can cover 700-960MHz, and its radiation efficiency is greater than -5dB, which meets the antenna design requirements and has better radiation efficiency.

It can be understood that, in other embodiments, the antenna structure 100 is not limited to setting the first breakpoint 123 and the second breakpoint 124, that is, the number of the breakpoints is not limited to two, and only one or more It is only necessary to ensure that the antenna structure 100 can form at least a first antenna segment A1 and a second antenna segment A2 spaced from each other.

As described above, the antenna structure 100 is provided from the front frame 111 by setting the slot 120, the first slot 121, the second slot 122, the first break point 123, and the second break point 124. A first antenna section A1 and a second antenna section A2 arranged at intervals are divided. The antenna structure 100 is further provided with a coupling portion 14, a parasitic portion 15, and a radiating portion 16, so that the coupling portion 14, the parasitic portion 15 and the first antenna segment A1 constitute a first antenna ANT1 to generate a medium, Radiation signals in high frequency bands. The radiation section 16 and the second antenna section A2 form a second antenna ANT2 to generate a radiation signal in a low frequency band. Therefore, the wireless communication device 200 may use the Carrier Aggregation (CA) technology of the LTE-Advanced and the first antenna ANT1 and the second antenna ANT2 to receive or transmit in multiple different frequency bands simultaneously. Wireless signals to increase transmission bandwidth.

In addition, the antenna structure 100 is provided with the casing 11, and the first opening 118, the second opening 119, the slot 120, the first slot 121, the second slot 122, A breakpoint 123 and a second breakpoint 124 are both disposed on the front frame 111 and the frame 113 and are not disposed on the back plate 112, so that the back plate 112 forms a full metal structure, that is, the back plate There are no insulated slots, breaks, or breaks on the 112, so that the back plate 112 can avoid affecting the integrity and aesthetics of the back plate 112 due to the settings of the slots, breaks, or breaks.

Please refer to FIGS. 19 to 21 together, which is an antenna structure 100a provided by the second preferred embodiment of the present invention. The antenna structure 100a includes a housing 11, a first ground portion 12, a second ground portion 13, a coupling portion 14, a radiating portion 16, a first feed source S1, a second feed source S2, a switching circuit 18, and a matching circuit. 27 和 滤 电路 29。 27 and the filter circuit 29. The casing 11 includes a front frame 111, a back plate 112 and a frame 113. The frame 113 includes at least a tip portion 115, a first side portion 116, and a second side portion 117. The frame 113 is further provided with a first opening 118, a second opening 119 and a slot 120. The front frame 111 is provided with a first slit 121, a second slit 122, a first break point 123, and a second break point 124. The slot 120, the first slot 121, the second slot 122, the first breakpoint 123, and the second breakpoint 124 collectively separate the first antenna segment A1 and the second antenna segment spaced from each other from the housing 11. A2.

It can be understood that, in this embodiment, the area between the antenna structure 100a and the antenna structure 100 The difference is that the distance between the first breakpoint 123 and the second breakpoint 124 is relatively large. Specifically, in this embodiment, a distance between the first break point 123 and the second break point 124 is 23.1 mm.

It can be understood that please refer to FIG. 19 and FIG. 20 together. In this embodiment, the antenna structure 100a is different from the antenna structure 100 in that the antenna structure 100a does not include the parasitic portion 15, that is, the parasitic portion is omitted. 15. In this way, the first antenna ANT1 constitutes a three-port network structure, that is, the matching circuit 27 does not include the fourth matching element 174. Specifically in this embodiment, the matching circuit 27 includes a first matching element 271, a second matching element 272, and a third matching element 273. In this embodiment, the first matching element 271, the second matching element 272, and the third matching element 273 are all inductors, and their inductance values are 2.7nH, 13nH, and 0.8nH, respectively.

In addition, please refer to FIG. 21 together. In this embodiment, the antenna structure 100a is different from the antenna structure 100 in that the specific circuit structures of the filter circuit 29 and the filter circuit 19 are different. Specifically, the filter circuit 29 includes a first inductor L2, a second inductor L3, and a capacitor C3. The first inductor L2 and the second inductor L3 are connected in series between the first switching element 181 and the second feed source S2. One terminal of the capacitor C3 is electrically connected between the first inductor L2 and the second inductor L3, and the other terminal is electrically connected to the back plate 112, that is, grounded, and further connected to the first inductor L2 and the second inductor L3. Form a T-shaped filter structure. In one embodiment, the inductance values of the first inductor L2 and the second inductor L3 are both 9.1 nH. The capacitance of the capacitor C3 is 3.3 pF.

Please refer to Table 2 together for the working frequency band of the second antenna ANT2 in the antenna structure 100a when the switching circuit 18 in the antenna structure 100a adopts a different configuration.

FIG. 22 is a graph of S parameters (scattering parameters) of the first antenna ANT1 in the antenna structure 100a. FIG. 23 is a radiation efficiency curve diagram of the first antenna ANT1 in the antenna structure 100a. The curve S231 is the radiation efficiency of the first antenna ANT1 in the antenna structure 100a. The curve S232 is the total radiation efficiency of the first antenna ANT1 in the antenna structure 100a. Obviously, from FIG. 22 to FIG. 23, although the antenna structure 100 a does not include the parasitic part 15, the high frequency in the antenna structure 100 a can also cover 1710-2690 MHz, and its radiation efficiency and total radiation efficiency are both More than -3dB, meet the antenna design requirements, and have better radiation efficiency.

FIG. 24 is a graph of S parameters (scattering parameters) of the second antenna ANT2 in the antenna structure 100a. The curve S241 is the S11 value when the second antenna ANT2 operates at 704-746MHz (LTE-A band17). The curve S242 is the S11 value when the second antenna ANT2 operates at 746-787MHz (LTE-A band13). The curve S243 is the S11 value when the second antenna ANT2 operates at 824-894MHz (LTE-A band5). The curve S244 is the S11 value when the second antenna ANT2 operates at 880-960MHz (LTE-A band8).

FIG. 25 is a radiation efficiency curve diagram of the second antenna ANT2 in the antenna structure 100a. The curve S251 is the radiation efficiency when the second antenna ANT2 operates at 704-746MHz (LTE-A band17). Curve S252 is the radiation efficiency when the second antenna ANT2 operates at 746-787MHz (LTE-A band13). The curve S253 is the radiation efficiency when the second antenna ANT2 operates at 824-894MHz (LTE-A band5). The curve S254 is the radiation efficiency when the second antenna ANT2 operates at 880-960MHz (LTE-A band8).

FIG. 26 is a graph of the total radiation efficiency of the second antenna ANT2 in the antenna structure 100a. The curve S261 is the total radiation efficiency when the second antenna ANT2 operates at 704-746MHz (LTE-A band17). The curve S262 is the total radiation efficiency when the second antenna ANT2 operates at 746-787MHz (LTE-A band13). Curve S263 is the second antenna The total radiation efficiency of ANT2 when operating at 824-894MHz (LTE-A band5). The curve S264 is the total radiation efficiency when the second antenna ANT2 operates at 880-960MHz (LTE-A band8). Obviously, from FIG. 24 to FIG. 26, although the antenna structure 100 a does not include the parasitic portion 15, the low frequency of the antenna structure 100 a can also cover 700-960 MHz, and its radiation efficiency and total radiation efficiency are both greater than -5dB, meet the antenna design requirements, and have better radiation efficiency.

Example 3

Referring to FIG. 27, a third preferred embodiment of the present invention provides an antenna structure 300, which can be applied to wireless communication devices 400 such as mobile phones and personal digital assistants to transmit and receive radio waves to transmit and exchange wireless signals.

Please refer to FIG. 28 together. The antenna structure 300 includes a housing 31, a first radiating portion 33, a second radiating portion 34, a third radiating portion 35, and a signal feeding source 36. The casing 31 may be a casing of the wireless communication device 300. In this embodiment, the casing 31 is made of a metal material. The casing 31 includes a front frame 311, a back plate 312 and a frame 313. The front frame 311, the back plate 312, and the frame 313 may be integrally formed. The front frame 311, the back plate 312, and the frame 313 constitute a casing of the wireless communication device 400. The front frame 311 is provided with an opening (not shown) for receiving the display unit 401 of the wireless communication device 400. It can be understood that the display unit 401 has a display plane, the display plane is exposed from the opening, and the display plane is substantially parallel to the back plate 312.

The back plate 312 is opposite to the front frame 311. The back plate 312 is directly connected to the frame 313, and there is no gap between the back plate 312 and the frame 313. The back plate 312 is equivalent to a place where the antenna structure 300 and the wireless communication device 400 are located.

The frame 313 is sandwiched between the front frame 311 and the back plate 312, and is disposed around the periphery of the front frame 311 and the back plate 312, respectively, so as to communicate with the display unit 401 and the front plate. The frame 311 and the back plate 312 together form an accommodating space 314. The accommodation space 314 is used to accommodate Electronic components or circuit modules such as a circuit board and a processing unit of the wireless communication device 400 are placed therein.

The frame 313 includes at least a tip portion 315, a first side portion 316, and a second side portion 317. In this embodiment, the end portion 315 is a top end of the wireless communication device 400. The end portion 315 connects the front frame 311 and the back plate 312. The first side portion 316 and the second side portion 317 are disposed opposite to each other, and the two are respectively disposed at both ends of the end portion 315, and are preferably disposed vertically. The first side portion 316 and the second side portion 317 are also connected to the front frame 311 and the back plate 312.

The frame 313 is further provided with a slot 320. The front frame 311 defines a first slot 321, a second slot 322, a first break point 323, and a second break point 324. In this embodiment, the slot 320 is disposed on the end portion 315 and extends to the first side portion 316 and the second side portion 317, respectively. It can be understood that, in other embodiments, the slot 320 may be provided only at the end portion 315 and does not extend to any of the first side portion 316 and the second side portion 317, or the The slot 320 is disposed on the end portion 315 and extends along only one of the first side portion 316 and the second side portion 317.

The first slot 321, the second slot 322, the first break point 323, and the second break point 324 are all communicated with the slot 320 and extend to cut off the front frame 311. In this embodiment, the first slit 321 is opened on the front frame 311 and communicates with the first end D1 of the slot 320 disposed on the first side portion 316. The second slot 322 is opened on the front frame 311 and communicates with the second end D2 of the slot 320 disposed on the second side portion 317. The first breakpoint 323 and the second breakpoint 324 are spaced apart from each other on the front frame 311 between the first end D1 and the second end D2 and communicate with the slot 320. In this way, the slot 320, the first slot 321, the second slot 322, the first break point 323, and the second break point 324 collectively separate at least the corresponding antenna segment E1 from the casing 31. Wherein, the distance between the first gap 321 and the first breakpoint 323 The front frame 311 constitutes the antenna segment E1. It can be understood that, in this embodiment, the slot 320, the first gap 321, the second gap 322, the first break point 323, and the second break point 324 are all filled with an insulating material (such as plastic, rubber, glass, Wood, ceramics, etc., but not limited to this).

It can be understood that, in this embodiment, the slot 320 is opened at one end of the frame 313 near the back plate 312 and extends to the front frame 311, so that the antenna section E1 is completely partly described by The front frame 311 is configured. Of course, in other embodiments, the opening position of the slot 320 may be adjusted according to specific requirements. For example, the slot 320 is opened at one end of the frame 313 near the back plate 312 and extends in a direction in which the front frame 311 is located, so that the antenna section E1 is formed by a part of the front frame 311 and a part of The frame 313 is described.

It can be understood that the upper half of the front frame 311 and the frame 313 is not provided with any insulation other than the slot 320, the first slot 321, the second slot 322, the first break point 323, and the second break point 324. Slots, broken lines, or breakpoints, so the first half of the front frame 311 has only the first slot 321, the second slot 322, the first breakpoint 323, and the second breakpoint 324, and no other breakpoints.

It can be understood that, in this embodiment, the width of the slot 320 is approximately 3.43 mm. The widths of the first breakpoint 323 and the second breakpoint 324 are approximately 2 mm. The width of the first slit 321 and the second slit 322 is approximately 3.43 mm. The distance between the first breakpoint 323 and the second breakpoint 324 is approximately 11.1 mm.

Please refer to FIG. 29 together, the wireless communication device 400 further includes at least one electronic component. In this embodiment, the wireless communication device 400 includes a first electronic component 402, a second electronic component 403, a third electronic component 404, a fourth electronic component 405, and a fifth electronic component 406. The first electronic component 402 is a front camera module, which is disposed between the first breakpoint 323 and the first side portion 316. The second electronic component 403 is a speaker module, which is disposed between the first breakpoint 323 and the second breakpoint 324. The third electronic component 404 and the fourth electronic component 405 are rear camera modules, and the two are disposed between the second electronic component 403 and the second electronic component. Between the second side portions 317. The fifth electronic component 406 is a flash.

The back plate 312 is an integrally formed single metal sheet for exposing elements such as a dual camera lens (ie, the third electronic component 404 and the fourth electronic component 405) and a flash (ie, the fifth electronic component 406). Through holes 407, 408, and 409 are provided. The back plate 312 is not provided with any slot, break or break point for dividing the insulation of the back plate 312.

In this embodiment, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 are disposed at a distance from each other. The first radiation section 33 includes a first connection section J1, a first radiation section 331, a second radiation section 332, a third radiation section 333, a fourth radiation section 334, and a fifth radiation section 335. The first connection section J1 is substantially a rectangular strip, which is disposed in a plane perpendicular to the back plate 312 and is located between the first electronic component 402 and the second electronic component 403. One end of the first connection section J1 is electrically connected to the signal feeding source 36 for feeding current to the first radiating portion 33. The first radiation section 331 is disposed in a plane parallel to the back plate 312. The first radiating section 331 is substantially triangular, and a vertex of the first radiating section 331 is vertically connected to an end of the first connecting section J1 away from the signal feeding source 36. The second radiating section 332, the third radiating section 333, the fourth radiating section 334, and the fifth radiating section 335 are all disposed on the same plane as the first radiating section 331. The second radiating section 332 and the third radiating section 333 are both rectangular strips, and they are respectively electrically connected to the other two vertices of the first radiating section 331, and are respectively parallel to the end portion 315 and facing toward each other. The first side portion 316 and the second side portion 317 extend in the direction, and further form a substantially T-shaped structure with the first radiation section 331. The fourth radiating section 334 is substantially a rectangular strip, one end of which is vertically connected to one end of the third radiating section 333 away from the first radiating section 331, and is parallel to the first side portion 316 and near the radiating section. The end portion 315 extends in the direction. The fifth radiating section 335 is substantially a rectangular strip, one end of which is vertically connected to one end of the fourth radiating section 334 away from the third radiating section 333 and is parallel to the end portion 315 and close to the first The side portion 316 extends in the direction.

The second radiating portion 34 is disposed on the first radiating portion 33 and the third radiating portion 35. And includes a second connection section J2, a first radiation arm 341, a second radiation arm 342, a third radiation arm 343, a fourth radiation arm 344, and a fifth radiation arm 345 connected in this order. The second connection section J2 is substantially straight, and is disposed in a plane perpendicular to the back plate 312. One end of the second connection section J2 is electrically connected to the back plate 312, that is, grounded. The first radiating arm 341 is substantially rectangular strip-shaped, and is disposed in a plane parallel to the back plate 312. One end of the first radiating arm 341 is vertically connected to an end of the second connecting section J2 far from the back plate 312, and extends in a direction parallel to the first side portion 316 and close to the end portion 315. The second radiation arm 342, the third radiation arm 343, the fourth radiation arm 344, and the fifth radiation arm 345 are all coplanar with the first radiation arm 341. The second radiating arm 342 has a substantially rectangular strip shape, one end of which is vertically connected to one end of the first radiating arm 341 away from the second connecting section J2, and is parallel to the end portion 315 and close to the second The side portion 317 extends in the direction. The third radiating arm 343 has a substantially rectangular bar shape, one end of which is vertically connected to one end of the second radiating arm 342 far from the first radiating arm 341, and continues to run parallel to the first radiating arm 341 and close to all The end portion 315 extends in a direction. The fourth radiating arm 344 has a substantially rectangular bar shape, and one end of the fourth radiating arm 344 is vertically connected to an end of the third radiating arm 343 far from the second radiating arm 342. The two side portions 317 extend in the direction. The fifth radiating arm 345 has a substantially rectangular bar shape, and one end thereof is vertically connected to an end of the fourth radiating arm 344 far from the third radiating arm 343 and continues parallel to the third radiating arm 343 and near the end portion 315 It extends in the direction until it is electrically connected to a portion of the antenna segment E1 near the first breakpoint 323.

Please refer to FIGS. 27 and 30 again, the third radiating portion 35 is disposed between the second radiating portion 34 and the first side portion 316. The third radiating portion 35 includes a third connection section J3, a first resonance section 351, a second resonance section 352, a third resonance section 353, a fourth resonance section 354, and a fifth resonance section 355. The third connection section J3 is substantially straight, and is disposed in a plane perpendicular to the back plate 312. The third connection section J3 is disposed between the second connection section J2 and the first connection section. Between the side portions 316. One end of the third connection section J3 is electrically connected to the back plate 312, that is, grounded. The first resonance section 351 is substantially a rectangular strip, and is disposed in a plane parallel to the back plate 312. One end of the first resonance section 351 is electrically connected to an end portion of the third connection section J3 away from the back plate 312, and extends in a direction parallel to the first side portion 316 and close to the end portion 315. The second resonance section 352, the third resonance section 353, the fourth resonance section 354, and the fifth resonance section 355 are all coplanar with the first resonance section 351. The second resonance section 352 is substantially a rectangular strip, one end of which is vertically connected to an end of the first resonance section 351 away from the third connection section J3, and is parallel to the end portion 315 and close to the first section. The two side portions 317 extend in the direction. The third resonance section 353 is substantially triangular, and is connected to the connection between the first resonance section 351 and the second resonance section 352 and extends in a direction close to the first side portion 316. The fourth resonance section 354 is substantially a rectangular strip, one end of which is vertically connected to an end of the third resonance section 353 far from the second resonance section 352, and parallel to the first resonance section 351 and away from all The end portion 315 extends in a direction. The fifth resonance section 355 has a substantially rectangular strip shape, and one end thereof is vertically connected to an end of the fourth resonance section 354 away from the third resonance section 353, and is parallel to the end portion 315 and close to the first section. The two side portions 317 extend in a direction and pass through the second connection section J2 and the third connection section J3 and are spaced from the first electronic component 402.

Understandably, please refer to FIG. 31 and FIG. 33 together. In this embodiment, the antenna section E1, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 collectively constitute an antenna ANT3 for exciting. Resonant mode to generate a radiation signal in a preset frequency band. In this embodiment, the resonance mode is an LTE-A low, medium and high frequency mode. The preset frequency band includes a frequency band of 734-960MHz and a frequency band of 1805-2690MHz. Please refer to FIG. 31 for details. When a current enters from the signal feeding source 36, the current will flow through the first radiating portion 33 and be coupled to the second radiating portion 34 through the first radiating portion 33. . A portion of the current coupled to the second radiating portion 34 will be directly grounded through the second connection section J2 of the second radiating portion 34. Another part of the current flows directly into the antenna section E1 through the second radiating portion 34. The current flowing into the antenna section E1 is coupled to the second radiating section 34 again to be grounded through the second connection section J2 of the second radiating section 34, so that the second radiating section 34 is divided into four The wavelength mode excites the low-frequency band with a resonance frequency f ₀ = 920MHz, that is, the 734-960MHz band (see path I1). At the same time, the f ₀ octave frequency will also excite a high-frequency band with f ₁ = 2620 MHz, that is, the 2500-2690 MHz band.

Please refer to FIG. 32 as well. When a current enters from the signal feeding source 36, the current will flow through the first radiating portion 33 and be coupled to the second radiating portion through the first radiating portion 33. 34, then directly flows into the antenna section E1 through the second radiating section 34, and then is coupled to the third radiating section 35 through the antenna section E1, and finally through the third section of the third radiating section 35 The three connection sections J3 and the back plate 312 are grounded, so that the third radiating portion 35 excites the intermediate frequency band of f2 = 1940MHz, that is, the frequency band of 1805-2300MHz (see path I2).

Obviously, as can be seen from FIG. 31 and FIG. 32, in this embodiment, the second radiating portion 34 is used to extend the length of the antenna segment E1, and the third radiating portion 35 is used to transmit the signal through secondary coupling. Increase the bandwidth characteristic of the antenna ANT3.

Understandably, please refer to FIG. 33 together. In this embodiment, the antenna ANT3 constitutes a three-port network. The three ports include a first connection section J1, a second connection section J2, and a third connection section J3, and corresponding matching elements are provided at each port to form a corresponding matching circuit 37, thereby effectively adjusting and optimizing the Antenna ANT3 resonance frequency band. Specifically, in one embodiment, the matching circuit 37 includes a first matching element 371, a second matching element 372, and a third matching element 373. One end of the first matching element 371 is electrically connected between the first connection section J1 and the signal feeding source 36, and the other end is electrically connected to the back plate 312, that is, grounded. One end of the second matching element 372 is electrically connected to the second connection section J2, and the other end is electrically connected to the back plate 312, that is, grounded. One end of the third matching element 373 is electrically connected to the third connection section J3, and the other end is electrically connected to the back plate 312, that is, grounded. In this embodiment, the first matching Both the element 371 and the third matching element 373 are inductors. The second matching element 372 is an adjustable inductor that can be switched between a plurality of preset inductance values. In this way, by setting the adjustable second matching element 372 so that the matching circuit 37 also constitutes a switching circuit, thereby effectively adjusting the low-frequency mode and part of the high-frequency mode of the antenna ANT3. It can be understood that, in other embodiments, the first matching element 371, the second matching element 372, and the third matching element 373 are not limited to the inductance and / or the adjustable inductance described above, and may be other Matching element, switching element, or a combination thereof. For example, one or more of the first matching element 371, the second matching element 372, and the third matching element 373 may be a switching element that switches between a plurality of preset impedance values.

FIG. 34 is a graph of S parameters (scattering parameters) of the antenna structure 300 when the first matching element 371 is an inductor and is set to a different inductance value. The curve S341 is the S11 value of the antenna structure 300 when the first matching element 371 is an inductor with an inductance value of 10 nH. The curve S342 is the S11 value of the antenna structure 300 when the first matching element 371 is an inductor with an inductance value of 5 nH. The curve S343 is the S11 value of the antenna structure 300 when the first matching element 371 is an inductor with an inductance value of 25 nH. The curve S344 is the S11 value of the antenna structure 300 when the first matching element 371 is open.

FIG. 35 is a graph of S parameters (scattering parameters) of the antenna structure 300 when the second matching element 372 is an inductor and is set to a different inductance value. The curve S351 is the S11 value of the antenna structure 300 when the second matching element 372 is 0 ohms. The curve S352 is the S11 value of the antenna structure 300 when the second matching element 372 is an inductor with an inductance value of 3 nH. The curve S353 is the S11 value of the antenna structure 300 when the second matching element 372 is an inductor with an inductance value of 5 nH. The curve S354 is the S11 value of the antenna structure 300 when the second matching element 372 is an inductor with an inductance value of 15 nH. The curve S355 is the S11 value of the antenna structure 300 when the second matching element 372 is an inductor with an inductance value of 30 nH.

FIG. 36 shows when the third matching element 373 is an inductor and is set to a different voltage. When sensing the value, the S-parameter (scattering parameter) curve of the antenna structure 300. The curve S361 is the S11 value of the antenna structure 300 when the third matching element 373 is an inductor with an inductance value of 2.1 nH. The curve S362 is the S11 value of the antenna structure 300 when the third matching element 373 is an inductor having an inductance value of 1.5 nH. The curve S363 is the S11 value of the antenna structure 300 when the third matching element 373 is an inductor with an inductance value of 1.8 nH. The curve S364 is the S11 value of the antenna structure 300 when the third matching element 373 is an inductor having an inductance value of 2.4 nH. The curve S365 is the S11 value of the antenna structure 300 when the third matching element 373 is an inductor with an inductance value of 2.7 nH.

Obviously, as can be seen from FIG. 34 to FIG. 36, the third matching element 373 in the antenna structure 300 is mainly used to adjust the first high frequency band of the resonance mode, that is, the 2300-2400 MHz frequency band. The first matching element 371 is mainly used to adjust the second high frequency band of the resonance mode, that is, the 2500-2690 MHz frequency band. The second matching element 372 is mainly used to adjust the frequency points of the second high frequency band of the low frequency mode and the resonance mode.

Please refer to Table 3 together, when the first matching element 371 in the matching circuit 37 is an inductor with an inductance value of 10 nH, the third matching element 373 is an inductor with an inductance value of 2.1 nH, and the second matching When the element 372 has different inductances, the operating frequency band of the antenna structure 300.

FIG. 37 shows the S-parameters (scattering parameters) of the antenna structure 300 when it operates in a low frequency mode. Number) graph. The curve S371 is the S11 value when the antenna structure 300 works in the 704-746MHz frequency band and the 746-787MHz frequency band (LTE-A band 17/13). The curve S372 is the S11 value when the antenna structure 300 operates at 824-894MHz (LTE-A band5). The curve S373 is the S11 value when the antenna structure 300 operates at 880-960MHz (LTE-A band8).

FIG. 38 is a graph of S-parameters (scattering parameters) of the antenna structure 300 when the antenna structure 300 is operating in the middle and high-frequency modes. The curve S381 is the S11 value when the antenna structure 300 works in the intermediate frequency mode (1805-1910MHz). The curve S382 is the S11 value when the antenna structure 300 operates at 2300-2400MHz (LTE-A band40). The curve S383 is the S11 value when the antenna structure 300 operates at 2500-2690MHz (LTE-A band7).

FIG. 39 is a radiation efficiency curve diagram of the antenna structure 300 when it operates in a low frequency mode. The curve S391 is the radiation efficiency of the antenna structure 300 when it operates in the 704-746MHz frequency band and the 746-787MHz frequency band (LTE-A band 17/13). The curve S392 is the radiation efficiency of the antenna structure 300 when it operates at 824-894MHz (LTE-A band5). Curve S393 is the radiation efficiency of the antenna structure 300 when it operates at 880-960MHz (LTE-A band8).

FIG. 40 is a graph of the total radiation efficiency of the antenna structure 300 when it operates in a low frequency mode. The curve S401 is the total radiation efficiency of the antenna structure 300 when it operates in the 704-746MHz frequency band and the 746-787MHz frequency band (LTE-A band 17/13). The curve S402 is the total radiation efficiency of the antenna structure 300 when it operates at 824-894MHz (LTE-A band5). The curve S403 is the total radiation efficiency of the antenna structure 300 when it operates at 880-960MHz (LTE-A band8).

FIG. 41 is a radiation efficiency curve diagram of the antenna structure 300 when the antenna structure 300 is operated in the middle and high frequency modes. The curve S411 is the radiation efficiency of the antenna structure 300 when it operates in the intermediate frequency mode (1805-2300MHz). The curve S412 is the radiation efficiency of the antenna structure 300 when it operates at 2300-2400MHz (LTE-A band40). Curve S413 is the radiation efficiency of the antenna structure 300 when it operates at 2500-2690MHz (LTE-A band7).

FIG. 42 is a graph of the total radiation efficiency of the antenna structure 300 when it is operating in the middle and high frequency modes. The curve S421 is the total radiation efficiency of the antenna structure 300 when it operates in the intermediate frequency mode (1805-2300MHz). The curve S422 is the total radiation efficiency of the antenna structure 300 when it operates at 2300-2400MHz (LTE-A band40). Curve S423 is the total radiation efficiency of the antenna structure 300 when it operates at 2500-2690MHz (LTE-A band7).

Obviously, from FIG. 37 to FIG. 42, although the low frequency of the antenna structure 300 can cover 734-960 MHz, and its total radiation efficiency is greater than -7 dB. In the antenna structure 300, the high frequency can cover 1805-2690MHz, and its total radiation efficiency is greater than -5dB, which meets the antenna design requirements and has better radiation efficiency.

Understandably, please refer to FIG. 43a to FIG. 43h together. In other embodiments, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 are not limited to the above-mentioned configuration, and they may also be With other configurations, it is only necessary to ensure that the three radiating sections are spaced from each other. One of the radiating sections is electrically connected to the antenna section E1, and the other two radiating sections are spaced from the antenna section E1. In addition, one of the three radiating portions is electrically connected to the signal feed source 36, and the other two radiating portions are grounded. Current flows directly from the signal feed source 36 into the three radiating sections, which are electrically connected to the signal feed source 36 and is coupled to the other two radiating sections. The current flows directly into or is coupled to the antenna segment E1.

For example, please refer to FIG. 43a together. In one embodiment, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 are disposed at intervals from each other. The first radiating portion 33 is electrically connected to the signal feeding source 36 and is spaced from the antenna segment E1. The second radiating portion 34 is spaced from the antenna section E1 and is electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is spaced from the antenna segment E1 and is electrically connected to the back plate 312, that is, grounded.

Please refer to FIG. 43b together. In one embodiment, the first radiating portion 33 They are electrically connected to the antenna segment E1 and the signal feeding source 36, respectively. The second radiating portion 34 is spaced from the antenna section E1 and is electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is spaced from the antenna segment E1 and is electrically connected to the back plate 312, that is, grounded.

Please refer to FIG. 43c together. In one embodiment, the first radiating portion 33 is electrically connected to the one antenna segment E1, and the other end is electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is spaced from the antenna section E1 and is electrically connected to the signal feeding source 36. The third radiating portion 35 is spaced from the antenna segment E1 and is electrically connected to the back plate 312, that is, grounded.

Please refer to FIG. 43d together. In one embodiment, the first radiating portion 33 is spaced from the antenna section E1 and is electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is spaced from the antenna section E1 and is electrically connected to the signal feeding source 36. The third radiating portion 35 is electrically connected to the antenna segment E1, and is electrically connected to the back plate 312, that is, grounded.

Please refer to FIG. 43e together. In one embodiment, the first radiating portion 33 is spaced apart from the antenna segment E1, and is electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is electrically connected to the antenna segment E1 and is electrically connected to the signal feeding source 36. The third radiating portion 35 is spaced from the antenna segment E1 and is electrically connected to the back plate 312, that is, grounded.

Please refer to FIG. 43f together. In one embodiment, the first radiating portion 33 is spaced from the antenna section E1 and is electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is electrically connected to the antenna segment E1 and is electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is spaced from the antenna section E1 and is electrically connected to the signal feeding source 36.

Please refer to FIG. 43g together. In one embodiment, the first radiation portion 33 It is electrically connected to the antenna segment E1, and the other end is electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is spaced from the antenna section E1 and is electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is spaced from the antenna section E1 and is electrically connected to the signal feeding source 36.

Please refer to FIG. 43h together. In one embodiment, the first radiating portion 33 is spaced from the antenna segment E1 and is electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is spaced from the antenna section E1 and is electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is electrically connected to the antenna segment E1 and is electrically connected to the signal feeding source 36.

It can be understood that, in the above embodiment, the back plate 312 can be used as a place for the antenna structure 300 and the wireless communication device 400. In another embodiment, a shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 401 may be provided on a side of the display unit 401 facing the back plate 312. The shielding cover or the middle frame is made of a metal material. The shield cover or the middle frame may be connected to the back plate 312 to serve as a ground for the antenna structure 300 and the wireless communication device 400. At each of the above grounds, the shield cover or middle frame can replace the back plate 312 for grounding the antenna structure 300 or the wireless communication device 400. In another embodiment, the main circuit board of the wireless communication device 400 may be provided with a ground plane, which is grounded at each of the above locations. The ground plane may replace the backplane 312 for the antenna structure 300 or the antenna structure 300. The wireless communication device 400 is grounded. The ground plane may be connected to the shield cover, the middle frame, or the back plate 312.

As described above, the antenna structure 300 is at least divided from the front frame 311 by setting the slot 320, the first slot 321, the second slot 322, the first break point 323, and the second break point 324. Out of antenna section E1. The antenna structure 300 is further provided with a first radiating portion 33, a second radiating portion 34, a third radiating portion 35, and a signal feed source 36, so that the first radiating portion 33, The second radiating portion 34 and the third radiating portion 35 and the antenna segment E1 constitute an antenna ANT3 to generate radiation signals in LTE-A low, middle and high frequency bands. Therefore, the wireless communication device 400 may use the Carrier Aggregation (CA) technology of the LTE-Advanced and the antenna ANT3 to receive or send wireless signals in multiple different frequency bands at the same time to increase the transmission bandwidth.

In addition, the antenna structure 300 is provided with the case 31, and the slot 320, the first slot 321, the second slot 322, the first break point 323, and the second break point 324 on the case 31 are provided. The front frame 311 and the frame 313 are not disposed on the back plate 312, so that the back plate 312 constitutes a full metal structure, that is, the back plate 312 does not have insulation slots, broken wires, or Breakpoints enable the backplane 312 to avoid affecting the integrity and aesthetics of the backplane 312 due to slotting, disconnection, or the setting of breakpoints.

Example 4

Referring to FIG. 44, a fourth 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.

Please refer to FIG. 45 together. The antenna structure 500 includes a housing 51, a first resonance portion 53, a second resonance portion 54, an extension portion 55, and a signal feed source 56. The casing 51 may be a casing of the wireless communication device 600. In this embodiment, the casing 51 is made of a metal material. The casing 51 includes a front frame 511, a back plate 512 and a frame 513. The front frame 511, the back plate 512, and the frame 513 may be integrally formed. The front frame 511, the back plate 512, and the frame 513 constitute a casing of the wireless communication device 600. The 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 back plate 512.

The back plate 512 is opposite to the front frame 511. The back plate 512 is directly connected to the frame 513, and there is no gap between the back plate 512 and the frame 513. The back plate 512 is equivalent to a place where the antenna structure 500 and the wireless communication device 600 are located.

The frame 513 is sandwiched between the front frame 511 and the back plate 512, and is arranged around the periphery of the front frame 511 and the back plate 512, respectively, so as to communicate with the display unit 601 and the front plate. The frame 511 and the 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 and a processing unit of the wireless communication device 600 therein.

The frame 513 includes at least a tip portion 515, a first side portion 516, and a second side portion 517. In this embodiment, the end portion 515 is a top end of the wireless communication device 600. The end portion 515 connects the front frame 511 and the 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 both ends of the end portion 515, and are preferably disposed vertically. The first side portion 516 and the second side portion 517 are also connected to the front frame 511 and the back plate 512.

The frame 513 is also provided with a slot 520. A first slot 521, a second slot 522, a first break point 523, and a second break point 524 are defined in the front frame 511. In this embodiment, the slot 520 is disposed on the end 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 520 may be provided only at the end portion 515 and does not extend to any of the first side portion 516 and the second side portion 517, or the The slot 520 is disposed on the end portion 515 and extends along only one of the first side portion 516 and the second side portion 517.

The first slot 521, the second slot 522, the first break point 523, and the second break point 524 are all communicated with the slot 520 and extend to cut off the front frame 511. In this embodiment, the first slit 521 is opened on the front frame 511 and is arranged with the slot 520 on the first frame. A first end H1 of the one side portion 516 is communicated. The second slot 522 is opened on the front frame 511 and communicates with the second end H2 of the slot 520 arranged on the second side portion 517. The first break point 523 and the second break point 524 are disposed on the front frame 511 between the first end H1 and the second end H2 at intervals, and communicate with the slot 520. In this way, the slot 520, the first slot 521, the second slot 522, the first break point 523, and the second break point 524 collectively separate the corresponding antenna segment K1 from the casing 51. The front frame 511 between the first slot 521 and the first breakpoint 523 constitutes the antenna segment K1. It can be understood that, in this embodiment, the slot 520, the first gap 521, the second gap 522, the first break point 523, and the second break point 524 are all filled with an insulating material (such as plastic, rubber, glass, Wood, ceramics, etc., but not limited to this).

It can be understood that, in this embodiment, the slot 520 is opened at one end of the frame 513 near the back plate 512, and extends to the front frame 511, so that the antenna section K1 is completely partly described by The front frame 511 is configured. Of course, in other embodiments, the opening position of the slot 520 may be adjusted according to specific requirements. For example, the slot 520 is opened at one end of the frame 513 near the back plate 512 and extends in a direction where the front frame 511 is located, so that the antenna section K1 is formed by a part of the front frame 511 and a part of The frame 513 is described.

It can be understood that the upper half of the front frame 511 and the frame 513 is not provided with any insulation other than the slot 520, the first slot 521, the second slot 522, the first break point 523, and the second break point 524. Slots, broken lines, or breakpoints, so the upper half of the front frame 511 has only the first gap 521, the second gap 522, the first breakpoint 523, and the second breakpoint 524, and no other breakpoints.

It can be understood that, in this embodiment, the width of the slot 520 is approximately 3.43 mm. The width of the first break point 523 and the second break point 524 is approximately 2 mm. The width of the first slit 521 and the second slit 522 is approximately 3.43 mm.

Please refer to FIG. 46 together. The wireless communication device 600 further includes at least one electronic component. In this embodiment, the wireless communication device 600 includes a first electronic component 602, a second electrical The sub-element 603, the third electronic element 604, the fourth electronic element 605, and the fifth electronic element 606. The first electronic component 602 is a front camera module, which is disposed between the second breakpoint 524 and the second side portion 517. The second electronic component 603 is a speaker module, which is disposed between the first breakpoint 523 and the second breakpoint 524. The third electronic component 604 and the fourth electronic component 605 are both rear camera modules, and the two are disposed at an interval between the second electronic component 603 and the first side portion 516. The fifth electronic component 606 is a flash.

The back plate 512 is a single-piece metal sheet integrally formed to expose elements such as a dual camera lens (ie, the third electronic component 604 and the fourth electronic component 605) and a flash (ie, the fifth electronic component 606). The back plate 512 Through holes 607, 608, 609 are provided. The back plate 512 is not provided with any slot, break or break point for dividing the insulation of the back plate 512.

Understandably, please refer to FIG. 45 and FIG. 47. In this embodiment, since the slot 520 is opened at the end portion 515 and extends to the first side portion 516 and the second side portion 517. The antenna segment K1 includes a first segment K11 and a second segment K12 that are perpendicular to each other, and the first segment K11 and the second segment K12 form a bent angle at a connection thereof. All the bits of the first resonance portion 53, the second resonance portion 54, the extension portion 55, and the signal feed source 56 start at the first segment K11 and the second segment K12 and end at the first gap 521 and Within the containing space 525 of the first breakpoint 523.

In this embodiment, the first resonance portion 53, the second resonance portion 54, and the extension portion 55 are disposed at a distance from each other. The first resonance section 53 includes a first connection arm Q1, a first resonance section 531, and a second resonance section 532. The first connecting arm Q1 is substantially rectangular strip-shaped, is located in a plane perpendicular to the back plate 512, and is electrically connected to the signal feeding source 56 for feeding the first resonance portion 53. Current. The first resonance section 531 is substantially a rectangular strip, and is located in a plane parallel to the back plate 512. One end of the first resonance section 531 is vertically connected to one end of the first connecting arm Q1 away from the signal feed source 56 and extends in a direction parallel to the first side portion 516 and close to the end portion 515. Until it is electrically connected to the first section K11.所述 第二 共 The total The vibration section 532 and the first resonance section 531 are coplanar. The second resonance section 532 is substantially triangular. One end of the second resonance section 532 is vertically connected to a side of the first resonance section 531 away from the first side portion 516 and extends in a direction close to the second side portion 517.

The second resonance portion 54 includes a second connection arm Q2 and a resonance arm 541. The second connecting arm Q2 is disposed in a plane perpendicular to the back plate 512. The second connecting arm Q2 is substantially rectangular strip-shaped, and is electrically connected to the back plate 512, that is, grounded. The resonance arm 541 is substantially straight, and is disposed in a plane parallel to the back plate 512. One end of the resonance arm 541 is electrically connected to one end of the second connection arm Q2 away from the back plate 512, and extends in a direction parallel to the end portion 515 and close to the first side portion 516 until it is connected with The second segment K12 is vertically connected to one side of the first slot 521.

In this embodiment, the extending portion 55 is an arc-shaped sheet body attached to the insulating material of the slot 520. Specifically, the extension portion 55 includes a first extension section 551 and a second extension section 552. The first extension section 551 and the second extension section 552 are perpendicular to each other, and form a bent angle at a connection between the two. The first extension segment 551 is attached to the insulating material of the slot 520 located at the end portion 515 and is electrically connected to the first segment K11. The second extension section 552 is attached to the insulating material of the slot 520 located on the first side portion 516, and a bent angle of the first extension section 551 and the second extension section 552 is attached to A corner between the first side portion 516 and the end portion 515 in the slot 520. In addition, in this embodiment, the first extension section 551 extends between the first resonance section 53 and the back plate 512, and the second extension section 552 extends to the second resonance section 54 and Between the back plates 512.

It can be understood that, in other embodiments, the extension portion 55 may not be attached to the insulating material of the slot 520. Specifically, the extending portion 55 may be disposed in parallel with the slot 520 at intervals, and the bending angle formed by the extending portion 55 is disposed in parallel with the bending angle of the antenna segment K1. In this way, the antenna segment K1 will be located on a first plane, and the extension 55 is located on a second plane. The back plate 512 is located on the third plane. The first plane, the second plane, and the third plane are different from each other and parallel to each other. The second plane is located between the first plane and the third plane.

Please refer to FIG. 48 and FIG. 49 together. It can be understood that, in this embodiment, the antenna segment K1, the first resonance portion 53, the second resonance portion 54, and the extension portion 55 collectively form the antenna ANT4, which is used to excite the resonance mode. State to generate a radiation signal in a preset frequency band. In this embodiment, the resonance mode includes a GPS mode and a WIFI 2.4G / 5G mode. For details, please refer to FIG. 48. After the current enters from the signal feeding source 56, the current will flow through the first resonance portion 53 and directly flow into the antenna segment K1 through the first resonance portion 53. , And then flows into the second resonance portion 54, and finally is grounded by the second resonance portion 54, so that the signal feed source 56, the first resonance portion 53, the antenna section K1 and the second resonance portion 54 are formed together. A loop antenna, so that the loop antenna excites the frequency band of the resonance frequency f ₀ = 1575MHz in a half-wavelength manner, that is, the GPS frequency band (see path X1).

When a current enters from the signal feeding source 56, the current will flow through the first resonance portion 53, and directly flow into the antenna section K1 through the first resonance portion 53, and then into the extension portion 55. So that the signal feed source 56, the first resonance portion 53, the antenna segment K1, and the extension portion 55 together form a monopole antenna, and the monopole antenna excites resonance in a quarter-wavelength manner. The frequency f ₁ = 2400MHz, that is, the WIFI 2.4G frequency band (see path X2). In addition, the multiple of the resonance frequency f ₁ will also excite a frequency band of the resonance frequency f ₂ = 5400 MHz, that is, the WIFI 5G frequency band.

Understandably, please refer to FIG. 49 again. In this embodiment, the antenna ANT4 constitutes a two-port network. The two ports include a first connecting arm Q1 and a second connecting arm Q2, and corresponding matching elements are provided at each port to form a corresponding matching circuit 57 to effectively adjust and optimize the resonance frequency band of the antenna ANT4. Specifically, in one embodiment, the matching circuit 57 includes a first matching element 571, a second matching element 572, and a third matching element. 573. One end of the first matching element 571 is electrically connected between the first connection arm Q1 and the signal feeding source 56, and the other end is electrically connected to the back plate 512, that is, grounded. One end of the second matching element 572 is electrically connected between the first matching element 571 and the first connecting arm Q1, and the other end is electrically connected to the back plate 512, that is, grounded. One end of the third matching element 573 is electrically connected to the second connection arm Q2, and the other end is electrically connected to the back plate 512, that is, grounded. In this embodiment, the first matching element 571 is an inductor, and the second matching element 572 and the third matching element 573 are both capacitors. It can be understood that, in other embodiments, the first matching element 571, the second matching element 572, and the third matching element 573 are not limited to the inductors and / or capacitors described above, and may also be other matching elements or Its combination.

FIG. 50 is a graph of S parameters (scattering parameters) of the antenna structure 500 when the extensions 55 have different lengths. The curve S501 is the S11 value of the antenna structure 500 when the extension 55 is a preset length. The curve S502 is the S11 value of the antenna structure 500 when the extension 55 is increased by 2 mm from the predetermined length. The curve S503 is the S11 value of the antenna structure 500 when the extension 55 is reduced by 2 mm based on a predetermined length. Obviously, it can be seen from the curves S501-S503 that when the length of the extension 55 is changed, the frequency point of the antenna structure 500 in the WIFI 2.4G / 5G mode can be effectively changed, and the frequency point of the GPS mode can be effectively changed. Offset has little effect.

FIG. 51 is a graph of S parameters (scattering parameters) of the antenna structure 500 when the second matching element 572 is a capacitor and is set to a different capacitance value. The curve S511 is the S11 value of the antenna structure 500 when the second matching element 572 is a capacitor having a capacitance of 0.25 pF. The curve S512 is the S11 value of the antenna structure 500 when the second matching element 572 is a capacitor having a capacitance value of 0.5 pF. The curve S513 is the S11 value of the antenna structure 500 when the second matching element 572 is a capacitor having a capacitance value of 1 pF. The curve S514 is the S11 value of the antenna structure 500 when the second matching element 572 is open. Obviously, it can be seen from the curves S511-S514 that The second matching element 572 is mainly used to adjust the bandwidth and impedance matching of the antenna structure 500 in the WIFI 2.4G / 5G mode.

FIG. 52 is a graph of S parameters (scattering parameters) of the antenna structure 500 when the third matching element 573 is a capacitor and is set to a different capacitance value. The curve S521 is the S11 value of the antenna structure 500 when the third matching element 573 is a capacitor with a capacitance value of 3 pF. The curve S522 is the S11 value of the antenna structure 500 when the third matching element 573 is a capacitor having a capacitance value of 2 pF. The curve S523 is the S11 value of the antenna structure 500 when the third matching element 573 is a capacitor with a capacitance value of 4 pF. The curve S524 is the S11 value of the antenna structure 500 when the third matching element 573 is a capacitor having a capacitance value of 5 pF. Obviously, it can be seen from the curves S521-S524 that the third matching element 573 is mainly used to adjust the frequency bandwidth and impedance matching of the antenna structure 500 in the GPS mode.

FIG. 53 shows when the first matching element 571 in the matching circuit 57 is an inductor with an inductance value of 10 nH, the second matching element 372 is a capacitor with a capacitance value of 0.25 pF, and the third matching element 573 is a capacitor with a capacitance value of 3 pF For capacitance, the S-parameter (scattering parameter) curve of the antenna structure 500. FIG. 54 shows that when the first matching element 571 in the matching circuit 57 is an inductor with an inductance value of 10 nH, the second matching element 372 is a capacitor with a capacitance value of 0.25 pF, and the third matching element 573 is a capacitor with a capacitance value of 3 pF A graph of the radiation efficiency of the antenna structure 500 when it is capacitive. The curve S541 is the radiation efficiency of the antenna structure 500. The curve S542 is the total radiation efficiency of the antenna structure 500.

Obviously, as can be seen from FIG. 53 and FIG. 54, the antenna structure 500 as a whole can achieve a multi-band antenna design, that is, 1565-1615 MHz, 2400-2480 MHz, and 5180-5800 MHz frequency bands, covering the GPS frequency band, WIFI 2.4G / 5G frequency band, and It has better radiation efficiency and meets the antenna design requirements.

Understandably, please refer to FIG. 55a to FIG. 55f together. In other embodiments, the first The first resonance portion 53, the second resonance portion 54, and the extension portion 55 are not limited to the above-mentioned configuration, and other configurations may also be adopted. The first resonance portion 53, the second resonance portion 54, and the extension portion 55 need only be ensured The first resonance section 53 and the second resonance section 54 are electrically connected to each other, and one of the first resonance section 53 and the second resonance section 54 is electrically connected to the signal feed source 56. . For example, please refer to FIG. 55a together. In other embodiments, the electrical connection point between the extension 55 and the antenna segment K1 is not limited to the position of the antenna segment K1 adjacent to the first breakpoint 523. The antenna section K1 may also be located near the first slot 521 or any other position.

Please refer to FIG. 55b together. It can be understood that, in other embodiments, the extension 55 is a T-shaped structure, and can be electrically connected to the antenna section K1 at any position of the antenna section K1.

Please refer to FIG. 55c together. It can be understood that, in other embodiments, the extension portion 55 includes a plurality of extension arms, such as extension arms 551 and 553 electrically connected to each other. The extension 55 is electrically connected to the antenna segment K1.

Please refer to FIG. 55d together. It can be understood that, in other embodiments, the extension 55 is coupled to the antenna segment K1 at an interval, and is electrically connected to the back plate 512, that is, grounded.

Please refer to FIG. 55e together. It can be understood that in other embodiments, the connection relationship between the first resonance portion 53 and the second resonance portion 54 electrically connected to the signal feed source 56 and the ground can be interchanged. For example, the first resonance portion 53 is electrically connected to the back plate 512, that is, grounded. The second resonance portion 54 is electrically connected to the signal feeding source 56.

Please refer to FIG. 55f together. It can be understood that, in other embodiments, the first resonance portion 53 is not electrically connected to the antenna segment K1, but is disposed in spaced coupling. In this way, when a current enters from the signal feeding source 56, the current will flow into the first resonance portion 53 and be coupled to the antenna segment K1 through the first resonance portion 53.

It can be understood that, in the above embodiment, the back plate 512 can be used as a place for the antenna structure 500 and the wireless communication device 600. In another embodiment, the display unit 601 A shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 601 may be provided on the side facing the back plate 512. The shielding cover or the middle frame is made of a metal material. The shield cover or the middle frame may be connected to the back plate 512 to serve as a place for the antenna structure 500 and the wireless communication device 600. At each of the above grounds, the shield cover or middle frame can replace the back plate 512 for grounding the antenna structure 500 or the wireless communication device 600. In another embodiment, the main circuit board of the wireless communication device 600 may be provided with a ground plane, which is grounded at each of the above locations. The ground plane may replace the backplane 512 for the antenna structure 500 or the antenna structure 500. The wireless communication device 600 is grounded. The ground plane may be connected to the shield cover, the middle frame, or the back plate 512.

As described above, the antenna structure 500 is divided at least from the front frame 511 by setting the slot 520, the first slot 521, the second slot 522, the first break point 523, and the second break point 524. Out of antenna section K1. The antenna structure 500 is further provided with a first resonance portion 53, a second resonance portion 54, an extension portion 55, and a signal feed source 56, so that the first resonance portion 53, the second resonance portion 54, and the extension portion 55 and The antenna section K1 constitutes the antenna ANT4 to generate radiation signals in the GPS and WIFI 2.4G / 5G frequency bands.

In addition, the antenna structure 500 is provided with the housing 51, and the slot 520, the first slot 521, the second slot 522, the first break point 523, and the second break point 524 on the housing 51 are provided. The front frame 511 and the frame 513 are not disposed on the back plate 512, so that the back plate 512 constitutes an all-metal structure, that is, the back plate 512 does not have insulation slots, broken wires, or Breakpoints, so that the backplane 512 can avoid affecting the integrity and aesthetics of the backplane 512 due to slotting, disconnection, or the setting of breakpoints.

The antenna structures 100 and 100a of the embodiment 1-2 and the antenna structures 300 and 500 of the embodiment 3-4 can be applied to the same wireless communication device. For example, the antenna structure 300 is used as the antenna above the wireless communication device, and the antenna structure 100 or 100a is used as the antenna of the wireless communication device. Under the antenna. When the wireless communication device sends a wireless signal, the wireless communication device uses the lower antenna to send a wireless signal. When the wireless communication device receives the wireless signal, the wireless communication device uses the upper antenna and the lower antenna to receive the wireless signal together. The wireless communication device may further include the antenna structure 500 to support more frequency bands, such as GPS and WIFI frequency bands.

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 also 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 the present invention.

Claims (19)

An antenna structure includes a casing, a first resonance portion, a second resonance portion, an extension portion, and a signal feed source. The casing includes a front frame, a back plate, and a frame. The frame is sandwiched between the front frame and the front frame. Between the back plates, a slot is provided on the frame, and a slot and a breakpoint are provided on the front frame, and the slot and the breakpoint communicate with the slot and extend to cut off the front frame. The slot, the slot, and the breakpoint collectively divide an antenna segment from the housing, the antenna segment includes a first segment and a second segment that are perpendicular to each other, and the first resonance portion and the second resonance The extension part and the extension part are all located in the accommodation space that starts at the first and second sections and ends at the gap and the breakpoint. The first resonance section is directly electrically connected to the antenna section or with the antenna section. The antenna section is coupled and arranged at intervals, the second resonance section is electrically connected to the antenna section, the extension is directly electrically connected to the antenna section or is spaced from the antenna section, and the first resonance section and One of the second resonance parts is electrically connected to the signal feed source, and A resonance portion and another resonance portion are grounded. The frame includes at least a tip portion, a first side portion, and a second side portion. The first side portion and the second side portion are respectively connected to the tip portion. At both ends, the first resonance section includes a first connection arm, a first resonance section, and a second resonance section. One end of the first resonance section is vertically connected to the first connection arm, and is parallel to the first connection section. One side portion extends in a direction close to the end portion, and one end of the second resonance section is vertically connected to one side of the first resonance section away from the first side portion, and extends along a portion near the second side portion. Direction. The antenna structure according to item 1 of the scope of patent application, wherein the slot, the slot and the break point are filled with an insulating material. The antenna structure according to item 2 of the scope of patent application, wherein the extension includes a first extension and a second extension, and the first extension and the second extension are perpendicular to each other and between the two. A corner is formed at the connection, the extension is attached to the slotted insulating material, and the corner of the extension is attached to the slot. The antenna structure according to item 1 of the scope of patent application, wherein the extension includes a first extension and a second extension, the first extension and the second extension are perpendicular to each other, and the first extension Segments are arranged parallel to the first segment at intervals, and the second extended segment is arranged parallel to the second segment at intervals. The antenna structure according to item 4 of the scope of patent application, wherein the first extension section and the second extension section form a bend at the connection between the two, and the first section and the second section are at both A bent angle is formed at the connection portion, and the bent angle of the extension portion and the bent angle of the antenna section are arranged in parallel with each other. The antenna structure according to item 1 of the scope of patent application, wherein the antenna segment is disposed on a first plane, the extension portion is disposed on a second plane, the back plate is disposed on a third plane, the first plane, The second plane and the third plane are different from each other and parallel to each other, and the second plane is located between the first plane and the third plane. The antenna structure according to item 1 of the scope of patent application, wherein a part of the extension is located between the first resonance part and the back plate, and another part of the extension is located between the second resonance part and Between the backplanes. The antenna structure according to item 1 of the patent application scope, wherein the extension portion includes a plurality of extension arms, and the extension portion is electrically connected to the antenna segment. The antenna structure according to item 1 of the patent application scope, wherein the extension portion includes two extension arms, one of which is electrically connected to the antenna section, and forms a T-shaped structure with the other extension arm. The antenna structure according to item 1 of the scope of patent application, wherein the extension portion is coupled to the antenna segment and is grounded. The antenna structure according to item 1 of the patent application scope, wherein the slot is provided at least at the end portion, the first connecting arm is located in a plane perpendicular to the backplane, and is in contact with the signal feed The source is electrically connected to the source. The first resonance section and the second resonance section are coplanar and are located in a plane parallel to the back plate. One end of the first resonance section is vertically connected to the first resonance section. A connecting arm is far from one end of the signal feeding source and is electrically connected to the first section. The antenna structure according to item 11 in the scope of patent application, wherein the second resonance portion includes a second connection arm and a resonance arm, one end of the second connection arm is grounded, and one end of the resonance arm is connected to the second The other end of the connecting arm is electrically connected and extends in a direction parallel to the end portion and close to the first side portion until it is perpendicularly connected to one side of the second section near the gap. The antenna structure according to item 12 of the scope of patent application, wherein the antenna section, the first resonance part, the second resonance part, and the extension part collectively constitute a first antenna, and the first antenna includes a matching Circuit, the matching circuit is electrically connected to the first resonance section and the second resonance section, thereby adjusting and optimizing the resonance frequency band of the first antenna. The antenna structure according to item 13 of the application, wherein the matching circuit includes a first matching element, a second matching element, and a third matching element, and one end of the first matching element is electrically connected to the first connection. Between the arm and the signal feed source, the other end is grounded, and one end of the second matching element is electrically connected between the first matching element and the first connecting arm, and the other end is grounded, and the third One end of the matching element is electrically connected to the second connection arm, and the other end is grounded. The antenna structure according to item 12 of the scope of patent application, wherein when a current enters from the signal feed source, the current flows through the first resonance portion and directly flows into the antenna through the first resonance portion. Segment, then flows into the second resonance part, and finally is grounded by the second resonance part, so that the signal feed source, the first resonance part, the antenna segment and the second resonance part together form a loop antenna, and So that the loop antenna excites a first frequency band in a half-wavelength manner; when a current enters from the signal feed source, a current flows through the first resonance section, and directly through the first resonance section Into the antenna section, and then into the extension section through the antenna section, so that the signal feed source, the first resonance section, the antenna section, and the extension section together form a monopole antenna, and make the The monopole antenna excites the second frequency band in a quarter-wavelength manner, and at the same time, the frequency multiplication of the second frequency band also excites the third frequency band, and the frequency of the third frequency band is higher than the frequency of the second frequency band, The second frequency band has a high frequency The first band of frequencies. The antenna structure according to item 1 of the scope of the patent application, wherein the back plate is a single metal piece integrally formed, the back plate is directly connected to the frame, there is no gap between the back plate and the frame, and the back plate There are no slots, breaks, or breaks on the back panel for dividing the insulation of the backplane. A wireless communication device includes the antenna structure according to any one of claims 1-16 of the scope of patent application. The wireless communication device according to item 17 of the scope of patent application, wherein the wireless communication device further includes a display unit, the front frame, the back plate, and a frame constitute a casing of the wireless communication device, and the front frame is provided with an opening. The display unit is used for accommodating the display unit. The display unit has a display plane, the display plane is exposed through the opening, and the display plane is arranged in parallel with the back plate. The wireless communication device according to item 17 of the scope of the patent application, wherein the wireless communication device further includes a dual camera module and a flash, and the back plate is provided with a through hole for exposing the dual camera module and the flash.