TW201806245A - Antenna structure and wireless communication device with same - Google Patents

Abstract

The present invention provides an antenna structure including 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 backboard, and a side frame. The side frame defines a slot. The front frame defines a first gap and a first groove. The housing is divided into a first antenna section by the slot, the first gap, and the first groove. One end of the first ground portion is electrically connected to the first antenna section. Another end of the first ground portion is grounded. One end of the second ground portion is electrically connected to the first antenna section. Another end of the second ground portion is grounded. The coupling portion is spaced apart from the first antenna section. A current from the first feed source is coupled to the first antenna section through the coupling portion.

Description

Antenna structure and wireless communication device having the same

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

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

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

An antenna structure includes a housing, a first grounding portion, a second grounding portion, a coupling portion, and a first feeding source, the housing including a front frame, a back plate, and a frame, the frame being sandwiched by the front frame a slot is formed in the frame, and the first frame and the first break point are opened on the front frame, and the first slot and the first break point are connected to the slot. And extending to the front frame, wherein the slot, the first slot and the first break point jointly divide a first antenna segment from the housing, and one end of the first ground portion is electrically connected to the a first antenna segment, the other end is grounded, the second ground portion is spaced apart from the first ground portion, and one end is electrically connected to the first antenna segment, and the other end is grounded, and one end of the coupling portion is electrically connected to The first feed source is spaced apart from the first antenna segment, and a current from the first feed source is coupled to the first antenna segment by the coupling portion.

A wireless communication device comprising 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 frequency, and have a wide frequency range. In addition, the slot, the first slot, the second slot, the first breakpoint, and the second breakpoint on the housing of the antenna structure are disposed on the front frame and the frame, and are not disposed on the backplane. So that the back plate constitutes an all-metal structure, that is, there is no insulating slot, broken line or break point on the back plate, so that the back plate can be prevented from being affected by the setting of slotting, disconnection or breakpoint The integrity and aesthetics of the backboard.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without the creative work are all within the scope of the present invention.

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

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art. The terminology used in the description of the invention herein is for the purpose of describing the particular embodiments. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

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

Example 1-2

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

Referring to FIG. 2 together, the antenna structure 100 includes a housing 11, a first grounding portion 12, a second grounding portion 13, a coupling portion 14, a parasitic portion 15, a radiating portion 16, a first feeding source S1, and a second Feed into source S2. The housing 11 can be an outer casing of the wireless communication device 200. In the present embodiment, the housing 11 is made of a metal material. The housing 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. The front frame 111, the back plate 112 and the frame 113 constitute an outer casing of the wireless communication device 200. An opening (not shown) is disposed on the front frame 111 for receiving the display unit 201 of the wireless communication device 200. It can be understood that the display unit 201 has a display plane, the display plane is exposed to the opening, and the display plane is disposed substantially parallel to the backboard 112.

The back plate 112 is disposed 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 backplane 112 corresponds to the antenna structure 100 and the ground of the wireless communication device 200.

The frame 113 is disposed 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 to be opposite to the display unit 201 and the front The frame 111 and the back plate 112 together form an accommodation space 114. The accommodating space 114 is configured to receive electronic components or circuit modules of the circuit board, the processing unit, and the like of the wireless communication device 200.

The frame 113 includes at least a tip portion 115, a first side portion 116, and a second side portion 117. In the embodiment, the end portion 115 is the 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 is disposed opposite to the second side portion 117, and is disposed at two ends of the end portion 115, preferably 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.

A first opening 118, a second opening 119 and a slot 120 are defined in the frame 113. A first slot 121, a second slot 122, a first break point 123, and a second break point 124 are defined in the front frame 111. The first opening 118 and the second opening 119 are both formed on the end portion 115, and are spaced apart from each other and penetrate the end portion 115.

Referring to FIG. 3 together, the wireless communication device 200 further includes at least one electronic component. In the embodiment, the wireless communication device 200 includes a first electronic component 202, a second electronic component 203, a third electronic component 204, a fourth electronic component 205, and a fifth electronic component 206 (see FIG. 3). The first electronic component 202 is an earphone interface module disposed in the accommodating space 114 and disposed adjacent to the first side portion 116. The first electronic component 202 corresponds to the first opening 118 such that the first electronic component 202 is partially exposed from the first opening 118. Thus, 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 disposed in the accommodating space 114 and located between the first electronic component 202 and the second side 117. The second electronic component 203 corresponds to the second opening 119 such that the second electronic component 203 is partially exposed from the second opening 119. Thus, 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 an integrally formed single metal piece for exposing the dual camera lens (ie, the third electronic component 204 and the fourth electronic component 205) and the flash (ie, the fifth electronic component 206) and the like. Through holes 207, 208, 209 are provided. The backing plate 112 is not provided with any slot, break or break point for separating the insulation of the backing plate 112.

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

The first slot 121, the second slot 122, the first break point 123, and the second break point 124 are all in communication with the slot 120 and extend to block the front frame 111. In the embodiment, the first slot 121 is formed on the front frame 111 and communicates with the first end T1 of the first side portion 116 . The second slot 122 is defined in the front frame 111 and communicates with the slot 120 in the second end T2 of the second side portion 117 . The first break point 123 and the second break point 124 are spaced apart from the front frame 111 between the first end T1 and the second end T2 and communicate with the slot 120. In this manner, the slot 120, the first slot 121, the second slot 122, the first break point 123, and the second break point 124 collectively separate at least the first antenna segment A1 and the first interval from the housing 11. Two antenna segments A2. 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 the embodiment, the first break point 123 and the second break point 124 are respectively disposed on two 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 slot 121, the second slot 122, the first breakpoint 123, and the The two breakpoints 124 are filled with an insulating material (such as plastic, rubber, glass, wood, ceramics, etc., but not limited thereto).

It can be understood that, in this embodiment, the slot 120 is defined in the frame 113 near one end of the backboard 112 and extends to the front frame 111, so that the first antenna segment A1 and the second antenna The antenna segment A2 is completely constituted by a part of the front frame 111. Of course, in other embodiments, the opening position of the slot 120 can also be adjusted according to specific needs. For example, the slot 120 is disposed at one end of the frame 113 near the back plate 112 and extends toward the front frame 111 such that the first antenna segment A1 and the second antenna segment A2 are partially The front frame 111 and a part of the frame 113 are formed.

It can be understood that the front frame 111 and the lower half of the frame 113 are not provided with other insulation except the slot 120, the first slot 121, the second slot 122, the first break point 123, and the second break point 124. Slot, break or break point, so the lower half of the front frame 111 has only the first slit 121, the second slit 122, the first breakpoint 123 and the second breakpoint 124, and no other breakpoints.

It can be understood that, in this embodiment, the width of the slot 120 is approximately 3.43 mm. The width of the first breakpoint 123 and the second breakpoint 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 grounding portion 12 is disposed on a side of the first electronic component 202 near the first breakpoint 123. The first grounding portion 12 is substantially L-shaped and includes a first grounding segment G1 and a first connecting segment 126. The first grounding segment G1 has a substantially rectangular strip shape and is disposed in a plane perpendicular to the backing plate 112. One end of the first ground segment G1 is vertically connected to the first connecting segment 126, and the other end is electrically connected to the back plate 112, that is, grounded. The first connecting section 126 is substantially in the shape of a strip, and is disposed integrally in a plane parallel to the backing plate 112. One end of the first connecting segment 126 is perpendicularly connected to one end of the first grounding segment G1 away from the back plate 112, and the other end extends in a direction parallel to the first side portion 116 and adjacent to the end portion 115. Until the first antenna segment A1 is connected, so that the first antenna segment A1 is grounded by the first ground portion 12.

The second grounding portion 13 is disposed on a side of the first electronic component 202 near the first side portion 116. The second grounding portion 13 is substantially L-shaped and includes a second grounding segment G2 and a second connecting segment 131. The second grounding segment G2 has a substantially rectangular strip shape and is disposed in a plane perpendicular to the backing plate 112. One end of the second grounding segment G2 is electrically connected to the second connecting segment 131, and the other end is electrically connected to the backing plate 112, that is, grounded. The second connecting section 131 is substantially in the shape of a strip, and is disposed integrally in a plane parallel to the backing plate 112. One end of the second connecting segment 131 is perpendicularly connected to the second grounding segment G2 away from one end of the back plate 112, and the other end extends in a direction parallel to the first side portion 116 and adjacent to the end portion 115. Until the first antenna segment A1 is connected, so that the first antenna segment A1 is grounded by the second ground portion 13.

The first grounding portion 12 and the second grounding 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 portion 14 includes a first feeding section F1, a first coupling section 141, and a second coupling section 143. The first feeding segment 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 backing plate 112. One end of the first feeding segment F1 is electrically connected to the first coupling segment 141, and the other end is electrically connected to the first feeding source S1 for feeding current to the coupling portion 14.

The first coupling section 141 has a substantially rectangular strip shape and is disposed in a plane parallel to the backing plate 112. One end of the first coupling segment 141 is perpendicularly connected to one end of the first feeding segment 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 The direction extends. The second coupling section 143 is disposed coplanar with the first coupling section 141. The second coupling section 143 is perpendicularly connected to the end of the first coupling section 141 away from the first feeding section F1, and is parallel to the end portion 115 and adjacent to the first side portion 116 and The two side portions 117 extend in the direction, and further form a T-shaped structure with the first coupling portion 141.

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

Referring to FIG. 4 and FIG. 5 together, it can be understood that, in this embodiment, the first antenna segment A1, the first ground portion 12, the second ground portion 13, the coupling portion 14, and the parasitic portion 15 together constitute the first The antenna ANT1 is configured to excite the first mode to generate a radiation signal of the first frequency band. In this embodiment, the first mode is an LTE-A medium-high frequency mode. The first frequency band is a frequency band of 1710-2690 MHz. Specifically, referring to FIG. 4, when a current enters from the first feed source S1, current will flow into the coupling portion 14 and be coupled to the first antenna segment A1 by the coupling portion 14 to Flowing through the first antenna segment A1 and grounding the first ground portion 12 and the second ground portion 13 such that the coupling portion 14 and the first antenna segment A1 are in a quarter The wavelength mode jointly excites the frequency band in the first modality, that is, the frequency band 1710-2300 MHz. At the same time, the coupling portion 14 and a portion of the first antenna segment A1 jointly excite the first high frequency band of the first modality, that is, the 2300-2400 MHz frequency band in a quarter-wavelength manner (refer to path I1). In addition, when a current enters from the first feed source S1, a current will flow into the coupling portion 14 and be coupled to the parasitic portion 15 by the coupling portion 14, and by the parasitic portion 15 The third ground segment G3 is grounded (refer to path I2) such that the parasitic portion 15 excites the second high frequency band of the first mode, ie, the 2500-2690 MHz band, in a quarter-wavelength manner. Obviously, in this embodiment, the parasitic portion 15 is mainly used to improve the high frequency band bandwidth of the first antenna ANT1.

Referring to FIG. 2 again, the radiation portion 16 is integrally disposed between the second electronic component 203 and the second side portion 117. 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 has a substantially rectangular strip shape disposed in a plane perpendicular to the backing plate 112 and 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 part 16.

The fourth grounding segment G4 is substantially in the shape of a strip, disposed in a plane perpendicular to the backing plate 112, and 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 backing plate 112, that is, grounded, and the other end is electrically connected to the first radiating section 161 to provide grounding for the radiating portion 16.

The first radiating section 161 has a substantially rectangular strip shape and is disposed in a plane parallel to the backing plate 112. One end of the first radiating section 161 is perpendicularly connected to one end of the second feeding section F2 away from the second feeding source S2, and is parallel to the end portion 115 and close to the first side portion 116. Extending a distance from the fourth ground segment G4 away from one end of the back plate 112, and then crossing the fourth ground segment G4 to continue along the end portion 115 and close to the first The direction of the side portion 116 extends. The second radiating section 163 is substantially rectangular in shape and is disposed coplanar with the first radiating section 161. One end of the second radiating section 163 is perpendicularly connected to one end of the first radiating section 161 away 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. The direction extends until it is electrically connected to one side of the second antenna segment A2 adjacent to the second break point 124.

Referring to FIG. 4 and FIG. 6 together, it can be understood that, in this embodiment, the radiating portion 16 and the second antenna segment A2 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. Specifically, referring again to FIG. 4, when a current enters from the second feed source S2, a current will flow into the radiation portion 16, and flow into the second antenna segment A2 through the radiation portion 16 to flow through. The second antenna segment A2 is grounded by the fourth ground segment G4 of the radiating portion 16 (refer to the path I3), thereby exciting the low frequency mode to generate a radiation signal in the frequency band of 700-960 MHz.

It can be understood that, referring to FIG. 5 again, in the embodiment, the first antenna ANT1 constitutes a four-port network. The four ports include a first ground segment G1, a second ground segment G2, a third ground segment G3, and a first feed segment F1, and a corresponding matching component is disposed at each port to constitute a corresponding matching circuit 17, Furthermore, the bandwidth and impedance matching of the first antenna ANT1 are effectively adjusted and optimized. Specifically in one of the embodiments, 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 source S1 is electrically connected to the backing plate 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 component 174 is electrically connected to the third ground segment G3, and the other end is electrically connected to the backing plate 112, that is, grounded. In this embodiment, the first matching component 171, the third matching component 173, and the fourth matching component 174 are all inductive. The second matching component 172 is a capacitor. Of course, in other embodiments, the first matching component 171, the second matching component 172, the third matching component 173, and the fourth matching component 174 are not limited to the inductors and capacitors described above, and may be other Matching elements or a combination thereof.

It can be understood that, referring to FIG. 6 again, in the embodiment, the second antenna ANT2 constitutes a two-port network. The two ports include a second feeding section F2 and a fourth grounding section G4, and the corresponding switching elements are configured by the corresponding switching elements at the respective ports, 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. One end of the first switching element 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 backing plate 112, that is, grounded. One end of the second switching element 183 is electrically connected to the fourth grounding segment G4, and the other end is electrically connected to the backing 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. Thus, by setting the inductance values of the adjustable first switching element 181 and the second switching element 183, the switching circuit 18 forms a double switching circuit, thereby effectively adjusting the low frequency mode of the second antenna ANT2. state. It is to be understood that in other embodiments, the first switching element 181 and the second switching element 183 are not limited to the tunable inductance described above, and may be other switching elements or combinations thereof, such as the A switching element 181 and a second switching element 183 can each switch 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 for effectively suppressing the high frequency harmonic mode, thereby effectively improving the first antenna ANT1 and the 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 feeding 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 back board 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 backing plate 112, that is, grounded, to the inductor L1 and the first capacitor. C1 constitutes a 滤波 type filter circuit. In this embodiment, the inductance of the inductor L1 is 9.1 nH. The capacitance values of the first capacitor C1 and the second capacitor C2 are both 4 pF.

It can be understood that the backplane 112 can serve as the antenna structure 100 and the wireless communication device 200. In another embodiment, a shielding mask for shielding electromagnetic interference or supporting a frame in the display unit 201 may be disposed on a side of the display unit 201 facing the backing plate 112. The shield or the middle frame is made of a metal material. The shield or the middle frame may be coupled to the back plate 112 to serve as the antenna structure 100 and the wireless communication device 200. Grounded at each of the above, the shield or middle frame can replace the backing 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 can be provided with a ground plane, which is grounded at each of the above, and the ground plane can replace the backplane 112 for the antenna structure 100 or The wireless communication device 200 is grounded. The ground plane may be connected to the shield, 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 component 171 is an inductor and is set to a different inductance value. The curve S71 is an S11 value of the first antenna ANT1 when the first matching component 171 is an inductor having an inductance value of 2.1 nH. The curve S72 is an S11 value of the first antenna ANT1 when the first matching element 171 is an inductance having an inductance value of 1.5 nH. The curve S73 is an S11 value of the first antenna ANT1 when the first matching element 171 is an inductance having 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 component 172 is a capacitor and is set to a different capacitance value. The curve S81 is an S11 value of the first antenna ANT1 when the second matching component 172 is a capacitor having a capacitance value of 30 pF. The curve S82 is an S11 value of the first antenna ANT1 when the second matching component 172 is a capacitor having a capacitance value of 10 pF. The curve S83 is an S11 value of the first antenna ANT1 when the second matching component 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 component 173 is an inductor and is set to a different inductance value. The curve S91 is an S11 value of the first antenna ANT1 when the third matching component 173 is an inductor having an inductance value of 8.2 nH. The curve S92 is an S11 value of the first antenna ANT1 when the third matching element 173 is an inductance having an inductance value of 6.2 nH. The curve S93 is an S11 value of the first antenna ANT1 when the third matching element 173 is an inductance having 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 component 174 is an inductor and is set to a different inductance value. The curve S101 is an S11 value of the first antenna ANT1 when the fourth matching component 174 is an inductor having an inductance value of 3.6 nH. The curve S102 is an S11 value of the first antenna ANT1 when the fourth matching component 174 is an inductor having an inductance value of 3.3 nH. The curve S103 is an S11 value of the first antenna ANT1 when the fourth matching component 174 is an inductance having an inductance value of 3.9 nH.

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

11 is the inductor of the first matching component 171, the second matching component 172, the third matching component 173, and the fourth matching component 174 in the matching circuit 17 respectively having an inductance value of 2.1 nH and a capacitance value of 30 pF. The S-parameter (scattering parameter) graph of the first antenna ANT1 when the capacitance and the inductance value are 8.2 nH and the inductance value is 3.6 nH.

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

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

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

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

Obviously, as shown in FIG. 13 to FIG. 15 , the second antenna ANT2 of the antenna structure 100 adjusts the frequency band (700/850/900 MHz) of the second antenna ANT2 mainly by the second switching component 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 for the working frequency band of the second antenna ANT2 in the antenna structure 100 when the switching circuit 18 adopts a different configuration.

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 704-746 MHz (LTE-A band 17). The curve S162 is the S11 value when the second antenna ANT2 operates at 746-787 MHz (LTE-A band 13). A curve S163 is an S11 value when the second antenna ANT2 operates at 824-894 MHz (LTE-A band 5). A curve S164 is an S11 value when the second antenna ANT2 operates at 880-960 MHz (LTE-A band 8).

17 is a graph showing the radiation efficiency of the second antenna ANT2 in the antenna structure 100. The curve S171 is the radiation efficiency when the second antenna ANT2 operates at 704-746 MHz (LTE-A band 17). Curve S172 is the radiation efficiency when the second antenna ANT2 operates at 746-787 MHz (LTE-A band 13). Curve S173 is the radiation efficiency when the second antenna ANT2 operates at 824-894 MHz (LTE-A band 5). Curve S174 is the radiation efficiency when the second antenna ANT2 operates at 880-960 MHz (LTE-A band 8).

18 is a graph showing 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 704-746 MHz (LTE-A band 17). Curve S182 is the total radiation efficiency when the second antenna ANT2 operates at 746-787 MHz (LTE-A band 13). A curve S183 is the total radiation efficiency when the second antenna ANT2 operates at 824-894 MHz (LTE-A band 5). Curve S184 is the total radiation efficiency when the second antenna ANT2 operates at 880-960 MHz (LTE-A band 8).

Obviously, as can be seen from FIG. 16 to FIG. 18, the low frequency of the antenna structure 100 can cover 700-960 MHz, and the radiation efficiency thereof is greater than -5 dB, which satisfies the antenna working 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 may be set. It is only necessary to ensure that the antenna structure 100 can form at least the first antenna segment A1 and the second antenna segment A2 that are spaced apart from each other.

As described above, the antenna structure 100 is divided from the front frame 111 by providing the slot 120, the first slot 121, the second slot 122, the first breakpoint 123, and the second breakpoint 124. The first antenna segment A1 and the second antenna segment A2 are spaced apart. 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 signal in the high frequency band. The radiating portion 16 and the second antenna segment A2 constitute a second antenna ANT2 to generate a radiation signal of a low frequency band. Therefore, the wireless communication device 200 can receive or transmit simultaneously with the first antenna ANT1 and the second antenna ANT2 in multiple different frequency bands by using Carrier Aggregation (CA) technology of LTE-Advanced (LTE-Advanced). Wireless signal to increase the transmission bandwidth.

In addition, the antenna structure 100 is provided with the housing 11, and the first opening 118, the second opening 119, the slot 120, the first slot 121, the second slot 122, and the first on the housing 11. A break point 123 and a second break point 124 are 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 constitutes an all-metal structure, that is, the back plate. There is no slotted, broken or broken point of insulation on the 112, so that the backing plate 112 can avoid affecting the integrity and aesthetics of the backing plate 112 due to the setting of the slot, the broken line or the break point.

Referring to FIG. 19 to FIG. 21, an antenna structure 100a according to a second preferred embodiment of the present invention is provided. The antenna structure 100a includes a housing 11, a first grounding portion 12, a second grounding portion 13, a coupling portion 14, a radiating portion 16, a first feeding source S1, a second feeding source S2, a switching circuit 18, and a matching circuit. 27 and filter circuit 29. The housing 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. A first opening 118, a second opening 119 and a slot 120 are defined in the frame 113. A first slot 121, a second slot 122, a first break point 123, and a second break point 124 are defined in the front frame 111. The slot 120, the first slot 121, the second slot 122, the first break point 123, and the second break point 124 collectively separate the first antenna segment A1 and the second antenna segment that are spaced apart from each other from the housing 11. A2.

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

It can be understood that, referring to FIG. 19 and FIG. 20, in the 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. As such, the first antenna ANT1 constitutes a three-port network structure, that is, the matching circuit 27 does not include the fourth matching component 174. Specifically in the present 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 component 271, the second matching component 272, and the third matching component 273 are both inductive and have inductance values of 2.7 nH, 13 nH, and 0.8 nH, respectively.

In addition, referring to FIG. 21, in the embodiment, the antenna structure 100a is different from the antenna structure 100 in that the specific circuit structure of the filter circuit 29 and the filter circuit 19 are not the same. 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 feeding source S2. One end of the capacitor C3 is electrically connected between the first inductor L2 and the second inductor L3, and the other end is electrically connected to the back plate 112, that is, grounded, and further, the first inductor L2 and the second inductor L3. Form a T-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 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.

Figure 22 is a graph of S-parameters (scattering parameters) of the first antenna ANT1 in the antenna structure 100a. Figure 23 is a graph showing the radiation efficiency 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. Curve S232 is the total radiation efficiency of the first antenna ANT1 in the antenna structure 100a. Obviously, as can be seen from FIG. 22 to FIG. 23, although the antenna structure 100a does not include the parasitic portion 15, the high frequency of the antenna structure 100a can also cover to 1710-2690 MHz, and the radiation efficiency and the total radiation efficiency are both More than -3dB, meets the antenna design requirements, and has better radiation efficiency.

Figure 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 704-746 MHz (LTE-A band 17). The curve S242 is the S11 value when the second antenna ANT2 operates at 746-787 MHz (LTE-A band 13). A curve S243 is an S11 value when the second antenna ANT2 operates at 824-894 MHz (LTE-A band 5). A curve S244 is an S11 value when the second antenna ANT2 operates at 880-960 MHz (LTE-A band 8).

Figure 25 is a graph showing the radiation efficiency of the second antenna ANT2 in the antenna structure 100a. The curve S251 is the radiation efficiency when the second antenna ANT2 operates at 704-746 MHz (LTE-A band 17). Curve S252 is the radiation efficiency when the second antenna ANT2 operates at 746-787 MHz (LTE-A band 13). Curve S253 is the radiation efficiency when the second antenna ANT2 operates at 824-894 MHz (LTE-A band 5). Curve S254 is the radiation efficiency when the second antenna ANT2 operates at 880-960 MHz (LTE-A band 8).

Figure 26 is a graph showing 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 704-746 MHz (LTE-A band 17). Curve S262 is the total radiation efficiency when the second antenna ANT2 operates at 746-787 MHz (LTE-A band 13). Curve S263 is the total radiation efficiency when the second antenna ANT2 operates at 824-894 MHz (LTE-A band 5). Curve S264 is the total radiation efficiency when the second antenna ANT2 operates at 880-960 MHz (LTE-A band 8). Obviously, as can be seen from FIG. 24 to FIG. 26, although the antenna structure 100a does not include the parasitic portion 15, the low frequency of the antenna structure 100a can also cover 700-960 MHz, and the radiation efficiency and total radiation efficiency are greater than -5dB, which meets the antenna design requirements and has better radiation efficiency.

Example 3

Referring to FIG. 27, a third preferred embodiment of the present invention provides an antenna structure 300 that can be applied to a wireless communication device 400 such as a mobile phone or a personal digital assistant for transmitting and receiving radio waves to transmit and exchange wireless signals.

Referring 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 housing 31 can be an outer casing of the wireless communication device 300. In the present embodiment, the housing 31 is made of a metal material. The housing 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 bezel 313 constitute an outer casing of the wireless communication device 400. An opening (not shown) is disposed on the front frame 311 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 to the opening, and the display plane is disposed substantially parallel to the backboard 312.

The back plate 312 is disposed 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 backplane 312 is equivalent to the antenna structure 300 and the ground of the wireless communication device 400.

The frame 313 is disposed between the front frame 311 and the back plate 312, and is disposed around the circumference of the front frame 311 and the back plate 312, respectively, to be opposite to the display unit 401 and the front The frame 311 and the back plate 312 together define an accommodating space 314. The accommodating space 314 is configured to receive electronic components or circuit modules of the circuit board, the processing unit, and the like of the wireless communication device 400.

The frame 313 includes at least a tip end portion 315, a first side portion 316, and a second side portion 317. In the embodiment, the end portion 315 is the 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 is disposed opposite to the second side portion 317, and is disposed at two ends of the end portion 315, preferably 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. A first slot 321 , a second slot 322 , a first break point 323 , and a second break point 324 are defined in the front frame 311 . In the 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 disposed only on the end portion 315 without extending to any one of the first side portion 316 and the second side portion 317, or The slot 320 is disposed at the end portion 315 and extends only to 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 both in communication with the slot 320 and extend to block the front frame 311 . In the embodiment, the first slot 321 is formed on the front frame 311 and communicates with the first slot D1 of the first side portion 316 . The second slot 322 is defined in the front frame 311 and communicates with the second slot D2 of the second side portion 317 . The first break point 323 and the second break point 324 are spaced apart from the front frame 311 between the first end D1 and the second end D2 and communicate with the slot 320. As such, the slot 320, the first slot 321, the second slot 322, the first breakpoint 323, and the second breakpoint 324 collectively separate at least the corresponding antenna segment E1 from the housing 31. The front frame 311 between the first slot 321 and the first break point 323 constitutes the antenna segment E1. It can be understood that in the embodiment, the slot 320, the first slot 321, the second slot 322, the first break point 323, and the second break point 324 are 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 segment E1 is completely described by the portion. The front frame 311 is constructed. Of course, in other embodiments, the opening position of the slot 320 can also be adjusted according to specific needs. For example, the slot 320 is disposed at one end of the frame 313 near the back plate 312 and extends toward the front frame 311 such that the antenna segment E1 is partially covered by the front frame 311 and a portion thereof. The frame 313 is constructed.

It can be understood that the upper frame 311 and the upper half of the frame 313 are not provided with other insulation except the slot 320, the first slot 321, the second slot 322, the first break point 323, and the second break point 324. Slot, break or break point, so the upper 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 first break point 323 and the second break point 324 have a width of 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 break point 323 and the second break point 324 is approximately 11.1 mm.

Referring to FIG. 29 together, the wireless communication device 400 further includes at least one electronic component. In the 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 disposed between the first break point 323 and the first side portion 316 . The second electronic component 403 is a speaker module disposed between the first break point 323 and the second break point 324. The third electronic component 404 and the fourth electronic component 405 are both rear camera modules, and are disposed between the second electronic component 403 and the second side 317. The fifth electronic component 406 is a flash.

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

In the embodiment, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 are spaced apart from each other. The first radiating portion 33 includes a first connecting portion J1, a first radiating portion 331, a second radiating portion 332, a third radiating portion 333, a fourth radiating portion 334, and a fifth radiating portion 335. The first connecting segment J1 is substantially in the shape of a strip, and is disposed in a plane perpendicular to the back plate 312 and located between the first electronic component 402 and the second electronic component 403. One end of the first connecting segment J1 is electrically connected to the signal feeding source 36 for feeding current to the first radiating portion 33. The first radiating section 331 is disposed in a plane parallel to the backing plate 312. The first radiating section 331 is substantially triangular, and an apex thereof is perpendicularly 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 coplanar with the first radiating section 331. The second radiating section 332 and the third radiating section 333 are each in a rectangular strip shape, and the two 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 the The first side portion 316 and the second side portion 317 extend in a direction, and further form a substantially T-shaped structure with the first radiating portion 331. The fourth radiating section 334 has a substantially rectangular strip shape, one end of which is vertically connected to the third radiating section 333 away from one end of the first radiating section 331 and is parallel to the first side portion 316 and adjacent to the The direction of the tip end portion 315 extends. The fifth radiating section 335 has a substantially rectangular strip shape, one end of which is perpendicularly connected to the fourth radiating section 334 away from one end of the third radiating section 333, and is parallel to the end portion 315 and close to the first The direction of the side portion 316 extends.

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

Referring again to FIGS. 27 and 30 , 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 connecting portion J3, a first resonating portion 351, a second resonating portion 352, a third resonating portion 353, a fourth resonating portion 354, and a fifth resonating portion 355. The third connecting section J3 is substantially straight and disposed in a plane perpendicular to the backing plate 312. The third connecting section J3 is disposed between the second connecting section J2 and the first side portion 316. One end of the third connecting segment J3 is electrically connected to the back plate 312, that is, grounded. The first resonating section 351 has a substantially rectangular strip shape and is disposed in a plane parallel to the backing plate 312. One end of the first resonating section 351 is electrically connected to an end of the third connecting section J3 away from the backing plate 312, and extends in a direction parallel to the first side portion 316 and adjacent to the end portion 315. The second resonating section 352, the third resonating section 353, the fourth resonating section 354, and the fifth resonating section 355 are all disposed coplanar with the first resonating section 351. The second resonating section 352 has a substantially rectangular strip shape, one end of which is perpendicularly connected to the end of the first resonating section 351 away from the third connecting section J3, and is parallel to the end portion 315 and close to the first The two side portions 317 extend in the direction. The third resonating section 353 is substantially triangular and is connected to the junction of the first resonating section 351 and the second resonating section 352 and extends in a direction close to the first side portion 316. The fourth resonating section 354 has a substantially rectangular strip shape, one end of which is perpendicularly connected to the end of the third resonating section 353 away from the second resonating section 352, and is parallel to the first resonating section 351 and away from the The direction of the tip end portion 315 extends. The fifth resonating section 355 has a substantially rectangular strip shape, one end of which is perpendicularly connected to the end of the fourth resonating section 354 away from the third resonating section 353, and is parallel to the end portion 315 and close to the first The two side portions 317 extend in the direction of the second connecting portion J2 and the third connecting portion J3 and are spaced apart from the first electronic component 402.

It can be understood that, referring to FIG. 31 and FIG. 33, in the embodiment, the antenna segment E1, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 together constitute an antenna ANT3 for exciting The resonant mode is used to generate a radiation signal of a predetermined frequency band. In this embodiment, the resonant mode is an LTE-A low, medium, and high frequency mode. The preset frequency band includes a 734-960 MHz frequency band and a 1805-2690 MHz frequency band. Referring to FIG. 31, when a current enters from the signal feed source 36, current will flow through the first radiating portion 33, and is coupled to the second radiating portion 34 by the first radiating portion 33. . A portion of the current coupled to the second radiating portion 34 will be directly grounded by the second connecting portion J2 of the second radiating portion 34. A further portion of the current flows directly into the antenna segment E1 by the second radiating portion 34. The current flowing into the antenna segment E1 is again coupled to the second radiating portion 34 to be grounded by the second connecting portion J2 of the second radiating portion 34, thereby causing the second radiating portion 34 to be divided by four points. The wavelength mode excites the low frequency band of the resonant frequency f ₀ = 920 MHz, that is, the 734-960 MHz band (refer to path I1). At the same time, the f ₀ frequency multiplier will also excite the high frequency band of f ₁ =2620MHz, that is, the frequency band 2500-2690MHz.

Referring to FIG. 32 together, when current enters from the signal feed source 36, current will flow through the first radiating portion 33, and is coupled to the second radiating portion by the first radiating portion 33. 34, then directly flowing into the antenna segment E1 by the second radiating portion 34, coupled to the third radiating portion 35 by the antenna segment E1, and finally by the third radiating portion 35 The three connection segments J3 and the backplane 312 are grounded such that the third radiating portion 35 excites the f2 = 1940 MHz intermediate frequency band, that is, the 1805-2300 MHz frequency band (see path I2).

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

It can be understood that, referring to FIG. 33, in the embodiment, the antenna ANT3 constitutes a three-port network. The three ports include a first connection segment J1, a second connection segment J2, and a third connection segment J3, and are configured by corresponding matching components at each port to form a corresponding matching circuit 37, thereby effectively adjusting and optimizing the The resonant frequency band of the antenna ANT3. 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 component 371 is electrically connected between the first connecting segment 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 component 372 is electrically connected to the second connecting segment J2, and the other end is electrically connected to the backing plate 312, that is, grounded. One end of the third matching element 373 is electrically connected to the third connection segment J3, and the other end is electrically connected to the back plate 312, that is, grounded. In this embodiment, the first matching component 371 and the third matching component 373 are both inductive. The second matching component 372 is an adjustable inductor that is switchable between a plurality of predetermined inductance values. Thus, by providing the adjustable second matching component 372, the matching circuit 37 also constitutes a switching circuit, thereby effectively adjusting the low frequency mode and the partial high frequency mode of the antenna ANT3. It can be understood that, in other embodiments, the first matching component 371, the second matching component 372, and the third matching component 373 are not limited to the inductors and/or adjustable inductors described above, and may be other Matching elements, switching elements, 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 switching elements that switch between a plurality of preset impedance values.

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

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

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

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

Referring to Table 3 together, when the first matching component 371 in the matching circuit 37 is an inductance having an inductance value of 10 nH, and the third matching component 373 is an inductance having an inductance value of 2.1 nH, and the second matching When the component 372 is a different inductance, the working frequency band of the antenna structure 300.

37 is a graph of S parameters (scattering parameters) when the antenna structure 300 operates in a low frequency mode. The curve S371 is the S11 value when the antenna structure 300 operates in the 704-746 MHz frequency band and the 746-787 MHz frequency band (LTE-A band 17/13). Curve S372 is the S11 value when the antenna structure 300 operates at 824-894 MHz (LTE-A band 5). Curve S373 is the S11 value when the antenna structure 300 operates at 880-960 MHz (LTE-A band 8).

38 is a graph of S-parameters (scattering parameters) when the antenna structure 300 operates in a medium- and high-frequency mode. The curve S381 is the S11 value when the antenna structure 300 operates in the intermediate frequency mode (1805-1910 MHz). Curve S382 is the S11 value when the antenna structure 300 operates at 2300-2400 MHz (LTE-A band 40). Curve S383 is the S11 value when the antenna structure 300 operates at 2500-2690 MHz (LTE-A band 7).

FIG. 39 is a graph showing the radiation efficiency of the antenna structure 300 when operating in a low frequency mode. The curve S391 is the radiation efficiency when the antenna structure 300 operates in the 704-746 MHz frequency band and the 746-787 MHz frequency band (LTE-A band 17/13). Curve S392 is the radiation efficiency of the antenna structure 300 operating at 824-894 MHz (LTE-A band 5). Curve S393 is the radiation efficiency of the antenna structure 300 when operating at 880-960 MHz (LTE-A band 8).

40 is a graph showing the total radiation efficiency of the antenna structure 300 when operating in a low frequency mode. The curve S401 is the total radiation efficiency when the antenna structure 300 operates in the 704-746 MHz frequency band and the 746-787 MHz frequency band (LTE-A band 17/13). Curve S402 is the total radiation efficiency of the antenna structure 300 operating at 824-894 MHz (LTE-A band 5). Curve S403 is the total radiation efficiency of the antenna structure 300 operating at 880-960 MHz (LTE-A band 8).

Figure 41 is a graph showing the radiation efficiency of the antenna structure 300 when it is operating in a medium and high frequency mode. The curve S411 is the radiation efficiency when the antenna structure 300 operates in the intermediate frequency mode (1805-2300 MHz). Curve S412 is the radiation efficiency of the antenna structure 300 operating at 2300-2400 MHz (LTE-A band 40). Curve S413 is the radiation efficiency when the antenna structure 300 operates at 2500-2690 MHz (LTE-A band 7).

Figure 42 is a graph showing the total radiation efficiency of the antenna structure 300 when operating in a medium and high frequency mode. The curve S421 is the total radiation efficiency when the antenna structure 300 operates in the intermediate frequency mode (1805-2300 MHz). Curve S422 is the total radiation efficiency of the antenna structure 300 operating at 2300-2400 MHz (LTE-A band 40). Curve S423 is the total radiation efficiency of the antenna structure 300 operating at 2500-2690 MHz (LTE-A band 7).

Obviously, as can be seen 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. Among the antenna structures 300, the high frequency can cover up to 1805-2690 MHz, and its total radiation efficiency is greater than -5 dB, which satisfies the antenna working design requirements and has better radiation efficiency.

It is to be understood that, as shown in FIG. 43a to FIG. 43h, 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 configuration, and may also be With other configurations, it is only necessary to ensure that the three radiating portions are spaced apart from each other, one of the radiating portions is electrically connected to the antenna segment E1, and the other two radiating portions are spaced apart from the antenna segment E1. In addition, one of the three radiating portions is electrically connected to the signal feeding source 36, and the other two radiating portions are grounded. For example, referring to FIG. 43a, in one embodiment, the first radiating portion 33, the second radiating portion 34, and the third radiating portion 35 are spaced apart from each other. The first radiating portion 33 is electrically connected to the signal feeding source 36 and is spaced apart from the antenna segment E1. The second radiating portion 34 is spaced apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is spaced apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded.

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

Referring 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 apart from the antenna segment E1 and is electrically connected to the signal feeding source 36. The third radiating portion 35 is spaced apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded.

Referring to FIG. 43d together, in one embodiment, the first radiating portion 33 is spaced apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is spaced apart from the antenna segment 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.

Referring to FIG. 43e together, in one embodiment, the first radiating portion 33 is spaced apart from the antenna segment E1 and 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 apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded.

Referring to FIG. 43f together, in one embodiment, the first radiating portion 33 is spaced apart from the antenna segment E1 and 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 apart from the antenna segment E1 and is electrically connected to the signal feeding source 36.

Referring to FIG. 43g together, in one embodiment, the first radiating portion 33 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 apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded. The third radiating portion 35 is spaced apart from the antenna segment E1 and is electrically connected to the signal feeding source 36.

Referring to FIG. 43h together, in one embodiment, the first radiating portion 33 is spaced apart from the antenna segment E1 and electrically connected to the back plate 312, that is, grounded. The second radiating portion 34 is spaced apart from the antenna segment E1 and 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 backplane 312 can serve as the antenna structure 300 and the wireless communication device 400. In another embodiment, a shielding mask for shielding electromagnetic interference or supporting a frame in the display unit 401 may be disposed on a side of the display unit 401 facing the back plate 312. The shield or the middle frame is made of a metal material. The shield or middle frame may be coupled to the backplane 312 to serve as the antenna structure 300 and the wireless communication device 400. Grounded at each of the above, the shield or middle frame can replace the backplane 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 can be provided with a ground plane, which is grounded at each of the above, and the ground plane can replace the backplane 312 for the antenna structure 300 or The wireless communication device 400 is grounded. The ground plane may be connected to the shield, the middle frame or the back plate 312.

As described above, the antenna structure 300 is divided by at least the front frame 311 by providing the slot 320, the first slot 321, the second slot 322, the first breakpoint 323, and the second breakpoint 324. Out of the antenna segment 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 feeding source 36, thereby making the first radiating portion 33, the second radiating portion 34, and the third The radiating portion 35 and the antenna segment E1 constitute an antenna ANT3 to generate radiation signals of the LTE-A low, medium and high frequency bands. Therefore, the wireless communication device 400 can receive or transmit wireless signals in multiple different frequency bands simultaneously with the antenna ANT3 to increase the transmission bandwidth by using Carrier Aggregation (CA) technology of LTE-Advanced.

In addition, the antenna structure 300 is provided with the housing 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 housing 31 are all disposed. The front frame 311 and the frame 313 are not disposed on the back plate 312, so that the back plate 312 forms an all-metal structure, that is, the back plate 312 has no insulating slot, disconnection or The breakpoints allow the backing plate 312 to avoid affecting the integrity and aesthetics of the backing plate 312 due to the provision of slots, breaks, or breakpoints.

Example 4

Referring to FIG. 44, a fourth preferred embodiment of the present invention provides an antenna structure 500, which can be applied to a wireless communication device 600 such as a mobile phone or a personal digital assistant for transmitting and receiving radio waves to transmit and exchange wireless signals.

Referring to FIG. 45 , the antenna structure 500 includes a housing 51 , a first resonating portion 53 , a second resonating portion 54 , an extending portion 55 , and a signal feeding source 56 . The housing 51 can be an outer casing of the wireless communication device 600. In the present embodiment, the housing 51 is made of a metal material. The housing 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 bezel 513 constitute an outer casing of the wireless communication device 600. An opening (not shown) is disposed on the front frame 511 for receiving the display unit 601 of the wireless communication device 600. It can be understood that the display unit 601 has a display plane, the display plane is exposed to the opening, and the display plane is disposed substantially parallel to the back plate 512.

The back plate 512 is disposed 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 backplane 512 is equivalent to the antenna structure 500 and the ground of the wireless communication device 600.

The frame 513 is disposed between the front frame 511 and the back plate 512, and is disposed around the periphery of the front frame 511 and the back plate 512 to be opposite to the display unit 601 and the front The frame 511 and the back plate 512 together define an accommodating space 514. The accommodating space 514 is configured to receive electronic components or circuit modules of the circuit board, the processing unit, and the like of the wireless communication device 600.

The frame 513 includes at least a tip portion 515, a first side portion 516, and a second side portion 517. In the embodiment, the end portion 515 is the 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 is disposed opposite to the second side portion 517, and is disposed at two ends of the end portion 515, preferably 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.

A groove 520 is further defined in the frame 513. 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 the 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 also be disposed only at the end portion 515 without extending to any one of the first side portion 516 and the second side portion 517, or A slot 520 is disposed in the end portion 515 and extends only along 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 both in communication with the slot 520 and extend to block the front frame 511. In the embodiment, the first slot 521 is formed on the front frame 511 and communicates with the first end H1 of the first side portion 516 . The second slot 522 is defined in the front frame 511 and communicates with the slot 520 disposed at the second end H2 of the second side portion 517. The first break point 523 and the second break point 524 are spaced apart from the front frame 511 between the first end H1 and the second end H2 and communicate with the slot 520. As such, the slot 520, the first slot 521, the second slot 522, the first breakpoint 523, and the second breakpoint 524 collectively separate the corresponding antenna segment K1 from the housing 51. The front frame 511 between the first slot 521 and the first break point 523 constitutes the antenna segment K1. It can be understood that, in this embodiment, the slot 520, the first slot 521, the second slot 522, the first breakpoint 523, and the second breakpoint 524 are 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 defined in the frame 513 near one end of the backboard 512 and extends to the front frame 511, so that the antenna segment K1 is completely described by the portion. The front frame 511 is constructed. Of course, in other embodiments, the opening position of the slot 520 can also be adjusted according to specific needs. For example, the slot 520 is defined in the frame 513 near one end of the back plate 512 and extends toward the front frame 511 such that the antenna segment K1 is partially covered by the front frame 511 and a portion thereof. The frame 513 is constructed.

It can be understood that the front frame 511 and the upper half of the frame 513 are not provided with other insulation except the slot 520, the first slot 521, the second slot 522, the first break point 523, and the second break point 524. Slot, break or break point, so the upper half of the front frame 511 has only the first slot 521, the second slot 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 first break point 523 and the second break point 524 have a width of approximately 2 mm. The width of the first slit 521 and the second slit 522 is approximately 3.43 mm.

Referring to FIG. 46 together, the wireless communication device 600 further includes at least one electronic component. In the embodiment, the wireless communication device 600 includes a first electronic component 602, a second electronic component 603, a third electronic component 604, a fourth electronic component 605, and a fifth electronic component 606. The first electronic component 602 is a front camera module disposed between the second break point 524 and the second side portion 517 . The second electronic component 603 is a speaker module 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 are disposed 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 an integrally formed single metal piece for exposing the dual camera lens (ie, the third electronic component 604 and the fourth electronic component 605) and the flash (ie, the fifth electronic component 606) and the like. Through holes 607, 608, 609 are provided. The backing plate 512 is not provided with any slot, break or break point for separating the insulation of the backing plate 512.

It can be understood that, referring to FIG. 45 and FIG. 47 , in the embodiment, the slot 520 is defined in 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 an angle at a joint thereof. The first resonating portion 53, the second resonating portion 54, the extending portion 55, and the signal feeding source 56 all start at the first segment K11 and the second segment K12 and end in the first slot 521 and The first breakpoint 523 is in the receiving space 525.

In the present embodiment, the first resonance portion 53, the second resonance portion 54, and the extension portion 55 are spaced apart from each other. The first resonating portion 53 includes a first connecting arm Q1, a first resonating section 531, and a second resonating section 532. The first connecting arm Q1 is substantially in the shape of a strip, which is located in a plane perpendicular to the backing plate 512 and is electrically connected to the signal feeding source 56 for feeding the first resonant portion 53. Current. The first resonant section 531 is substantially rectangular in shape and lies in a plane parallel to the backing plate 512. One end of the first resonant section 531 is perpendicularly connected to one end of the first connecting arm Q1 away from the signal feeding source 56, and extends in a direction parallel to the first side portion 516 and adjacent to the end portion 515. Until electrically connected to the first segment K11. The second resonant section 532 is disposed coplanar with the first resonant section 531. The second resonant section 532 is substantially triangular, and one end thereof is perpendicularly connected to one side of the first resonant 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 connecting arm Q2 and a resonant arm 541. The second connecting arm Q2 is disposed in a plane perpendicular to the backing plate 512. The second connecting arm Q2 is substantially in the shape of a strip and is electrically connected to the backing plate 512, that is, grounded. The resonant arm 541 is substantially straight and disposed in a plane parallel to the backing plate 512. One end of the resonant arm 541 is electrically connected to one end of the second connecting arm Q2 away from the back plate 512, and extends in a direction parallel to the end portion 515 and adjacent to the first side portion 516 until the The second segment K12 is vertically connected to one side of the first slit 521.

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

It can be understood that in other embodiments, the extending portion 55 may not be attached to the insulating material of the slot 520. Specifically, the extending portion 55 is spaced apart from the slot 520, and the corner formed by the extending portion 55 is disposed in parallel with the corner of the antenna segment K1. As such, the antenna segment K1 will be in a first plane, the extension 55 is in a second plane, and the backing plate 512 is in a third plane. The first plane, the second plane, and the third plane are different from each other and are parallel to each other. The second plane is located between the first plane and the third plane.

Referring to FIG. 48 and FIG. 49 together, it can be understood that in the embodiment, the antenna segment K1, the first resonating portion 53, the second resonating portion 54, and the extending portion 55 together constitute an antenna ANT4 for exciting the resonant mode. State to generate a radiation signal of a preset frequency band. In this embodiment, the resonant mode includes a GPS mode and a WIFI 2.4G/5G mode. For details, please refer to FIG. 48. After the current is fed from the signal feeding source 56, current will flow through the first resonating portion 53 and directly flow into the antenna segment K1 through the first resonating portion 53. And flowing into the second resonating portion 54 and finally being grounded by the second resonating portion 54 such that the signal feeding source 56, the first resonating portion 53, the antenna segment K1, and the second resonating portion 54 are formed together. A loop antenna, and causing the loop antenna to excite a frequency band of a resonant frequency f ₀ =1575 MHz in a half-wavelength manner, that is, a GPS frequency band (refer to path X1).

When the current enters from the signal feeding source 56, the current will flow through the first resonating portion 53, and directly flow into the antenna segment K1 through the first resonating portion 53, and then flow into the extending portion 55. So that the signal feed source 56, the first resonating 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 band f ₁ = 2400MHz, that is, the WIFI 2.4G frequency band (refer to path X2). In addition, the multiple of the resonant frequency f ₁ will also excite the frequency band of the resonant frequency f ₂ = 5400 MHz, that is, the WIFI 5G frequency band.

It can be understood that, referring again to FIG. 49, in the 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 the corresponding matching circuit 57 is configured by each port to effectively adjust and optimize the resonant frequency band of the antenna ANT4. In one embodiment, the matching circuit 57 includes a first matching component 571, a second matching component 572, and a third matching component 573. One end of the first matching component 571 is electrically connected between the first connecting arm Q1 and the signal feeding source 56, and the other end is electrically connected to the backing plate 512, that is, grounded. One end of the second matching component 572 is electrically connected between the first matching component 571 and the first connecting arm Q1, and the other end is electrically connected to the backplane 512, that is, grounded. One end of the third matching element 573 is electrically connected to the second connecting arm Q2, and the other end is electrically connected to the backing plate 512, that is, grounded. In this embodiment, the first matching component 571 is an inductor, and the second matching component 572 and the third matching component 573 are capacitors. It can be understood that in other embodiments, the first matching component 571, the second matching component 572, and the third matching component 573 are not limited to the above-mentioned inductance and/or capacitance, and may be other matching components or Its combination.

Figure 50 is a graph of S-parameter (scattering parameters) of the antenna structure 500 when the extensions 55 are of different lengths. The curve S501 is an S11 value of the antenna structure 500 when the extension portion 55 is a preset length. Curve S502 is the S11 value of the antenna structure 500 when the extension 55 is increased by 2 mm based on the predetermined length. The curve S503 is the S11 value of the antenna structure 500 when the extension portion 55 is reduced by 2 mm on the basis of the predetermined length. Obviously, as can be seen from the curves S501-S503, when the length of the extension portion 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 is changed. The offset has little effect.

FIG. 51 is a graph of S parameters (scattering parameters) of the antenna structure 500 when the second matching component 572 is a capacitor and is set to a different capacitance value. The curve S511 is an S11 value of the antenna structure 500 when the second matching component 572 is a capacitor having a capacitance value of 0.25 pF. The curve S512 is an S11 value of the antenna structure 500 when the second matching component 572 is a capacitor having a capacitance value of 0.5 pF. The curve S513 is an S11 value of the antenna structure 500 when the second matching component 572 is a capacitor having a capacitance value of 1 pF. Curve S514 is the S11 value of the antenna structure 500 when the second matching element 572 is open. Obviously, as can be seen from the curves S511-S514, the second matching component 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 an S11 value of the antenna structure 500 when the third matching component 573 is a capacitor having a capacitance value of 3 pF. A curve S522 is an S11 value of the antenna structure 500 when the third matching element 573 is a capacitor having a capacitance value of 2 pF. A curve S523 is an S11 value of the antenna structure 500 when the third matching element 573 is a capacitor having a capacitance value of 4 pF. The curve S524 is an S11 value of the antenna structure 500 when the third matching component 573 is a capacitor having a capacitance value of 5 pF. Obviously, as can be seen from the curves S521-S524, the third matching element 573 is mainly used to adjust the bandwidth and impedance matching of the antenna structure 500 in the GPS mode.

53 is the first matching element 571 of the matching circuit 57 having an inductance of 10 nH, the second matching element 372 having a capacitance of 0.25 pF, and the third matching element 573 having a capacitance of 3 pF. The S-parameter (scattering parameter) graph of the antenna structure 500 when the capacitor is used. FIG. 54 shows that in the matching circuit 57, the first matching component 571 has an inductance of 10 nH, the second matching component 372 has a capacitance of 0.25 pF, and the third matching component 573 has a capacitance of 3 pF. Radiation efficiency graph of the antenna structure 500 at the time of capacitance. The curve S541 is the radiation efficiency of the antenna structure 500. 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 can reach the multi-band antenna design as a whole, that is, the 1565-1615MHz, 2400-2480MHz, and 5180-5800MHz frequency bands, covering the GPS frequency band and the WIFI 2.4G/5G frequency band, and It has better radiation efficiency and meets the antenna design requirements.

It can be understood that, referring to FIG. 55a to FIG. 55f, in other embodiments, the first resonating portion 53, the second resonating portion 54, and the extending portion 55 are not limited to the above configuration, and other methods may be adopted. For example, it is only necessary to ensure that the first resonance portion 53, the second resonance portion 54, and the extension portion 55 are spaced apart from each other, and one of the first resonance portion 53 and the second resonance portion 54 is electrically connected to the signal feed. The source 56 may be grounded by one of the first resonance portion 53 and the second resonance portion 54. For example, please refer to FIG. 55a. In other embodiments, the electrical connection point between the extension portion 55 and the antenna segment K1 is not limited to the position of the antenna segment K1 adjacent to the first breakpoint 523. It is also possible that the antenna segment K1 is close to the position of the first slot 521 or any other position.

Referring to FIG. 55b, it can be understood that in other embodiments, the extension portion 55 is a T-shaped structure and can be electrically connected to the antenna segment K1 at any position of the antenna segment K1.

Referring 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, 553 that are electrically connected to each other. The extension 55 is electrically connected to the antenna segment K1.

Referring to FIG. 55d, it can be understood that in other embodiments, the extension portion 55 is spaced apart from the antenna segment K1 and electrically connected to the back plate 512, that is, grounded.

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

Referring to FIG. 55f, it can be understood that in other embodiments, the first resonating portion 53 is not electrically connected to the antenna segment K1, but is disposed in a spaced relationship. Thus, when a current enters from the signal feed source 56, current will flow into the first resonating portion 53 and be coupled to the antenna segment K1 by the first resonating portion 53.

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

As described above, the antenna structure 500 is divided by at least the front frame 511 by providing the slot 520, the first slot 521, the second slot 522, the first breakpoint 523, and the second breakpoint 524. Out of the antenna segment K1. The antenna structure 500 is further provided with a first resonating portion 53, a second resonating portion 54, an extending portion 55, and a signal feeding source 56, so that the first resonating portion 53, the second resonating portion 54, and the extending portion 55 are The antenna segment K1 constitutes an antenna ANT4 to generate a radiation signal of a GPS, WIFI 2.4G/5G frequency band.

In addition, the antenna structure 500 is provided by 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 all disposed. The front frame 511 and the frame 513 are not disposed on the back plate 512, so that the back plate 512 forms an all-metal structure, that is, the back plate 512 is not insulated, slotted or broken. The breakpoints allow the backing plate 512 to avoid affecting the integrity and aesthetics of the backing plate 512 due to the provision of slots, breaks, or breakpoints.

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

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

100, 100a, 300, 500‧‧‧ antenna structure
11, 31, 51‧‧‧ shell
111, 311, 511‧‧‧ front box
112, 312, 512‧‧‧ Backplane
113, 313, 513‧‧‧ border
114, 314, 514‧‧‧ accommodating space
525‧‧‧ accommodating space
115, 315, 515‧ ‧ end
116, 316, 516‧‧‧ first side
117, 317, 517‧‧‧ second side
118‧‧‧First opening
119‧‧‧Second opening
120, 320, 520‧‧‧ slotting
121, 321, 521‧‧‧ first gap
122, 322, 522‧‧‧ second gap
123, 323, 523‧‧‧ first breakpoint
124, 324, 524‧‧‧ second breakpoint
A1‧‧‧first antenna segment
E1, K1‧‧‧ antenna segment
K11‧‧‧ first paragraph
K12‧‧‧ second paragraph
A2‧‧‧second antenna segment
12‧‧‧First grounding
G1‧‧‧First grounding section
126, J1‧‧‧ first connection segment
13‧‧‧Second grounding
G2‧‧‧second grounding section
131, J2‧‧‧second connecting section
T1, D1, H1‧‧‧ first end
T2, D2, H2‧‧‧ second end
14‧‧‧Coupling
F1‧‧‧first feed segment
141‧‧‧First coupling section
143‧‧‧Second coupling section
15‧‧‧ Parasitic
G3‧‧‧ third grounding segment
151‧‧‧First parasitic segment
153‧‧‧Second parasitic
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 section
G4‧‧‧fourth grounding section
161, ‧ ‧ ‧ the first radiant section
163, 332‧‧‧second radiant section
333‧‧‧third radiant section
334‧‧‧fourth radiant section
335‧‧‧ fifth radiant section
53‧‧‧First Resonance
Q1‧‧‧First connecting arm
531‧‧‧First resonance segment
532‧‧‧Secondary resonance
54‧‧‧Second Resonance
Q2‧‧‧second connecting arm
541‧‧‧Resonance arm
55‧‧‧Extension
551‧‧‧First extension
552‧‧‧Second extension
17, 27, 37, 57‧‧‧ matching circuit
171, 271, 371, 571‧‧‧ first matching components
172, 272, 372, 572‧‧‧ second matching component
173, 273, 373, 573‧‧‧ third matching component
177‧‧‧fourth matching component
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 inductance
C3‧‧‧ capacitor
200, 400, 600‧‧‧ wireless communication devices
201, 401, 601‧‧‧ display unit
202, 402, 602‧‧‧ first electronic components
203, 403, 603‧‧‧ second electronic components
204, 404, 604‧‧‧ third electronic components
205, 405, 605‧‧‧ fourth electronic components
206, 406, 606‧‧‧ fifth electronic components
207, 208, 209, 407, 408, 409, 607, 608, 609‧‧‧ through holes
34‧‧‧Second Radiation Department
341‧‧‧First Radiation Arm
342‧‧‧second radiation arm
343‧‧‧ Third Radiation Arm
344‧‧‧fourth radial arm
345‧‧‧ fifth radiation arm
35‧‧‧ Third Radiation Department
J3‧‧‧ third connection
351‧‧‧First Resonant Section
352‧‧‧Second Resonance Section
353‧‧‧ Third Resonance Section
354‧‧‧fourth resonating section
355‧‧‧ fifth resonance section

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. 2 is a schematic diagram of the wireless communication device of FIG. 1 from another angle. 3 is a schematic view showing the assembly of the wireless communication device shown in FIG. 1. 4 is a schematic diagram of current flow of the antenna structure shown in FIG. 1. FIG. 5 is a circuit diagram of the antenna structure of FIG. 1 provided with a matching circuit. FIG. 6 is a circuit diagram of the antenna structure shown in FIG. 1 with a switching circuit and a filter circuit. FIG. 7 is a graph showing S-parameters (scattering parameters) of the antenna structure when the first matching elements in the antenna structure shown in FIG. 5 are set to different inductance values. FIG. 8 is a graph showing S-parameters (scattering parameters) of the antenna structure when the second matching elements in the antenna structure shown in FIG. 5 are set to different capacitance values. FIG. 9 is a graph showing S-parameters (scattering parameters) of the antenna structure when the third matching component in the antenna structure shown in FIG. 5 is set to different inductance values. FIG. 10 is a graph showing S-parameters (scattering parameters) of the antenna structure when the fourth matching component in the antenna structure shown in FIG. 5 is set to different inductance values. FIG. 11 is a graph showing S-parameters (scattering parameters) of the antenna structure when a matching circuit is provided with a specific inductance and capacitance in the antenna structure shown in FIG. 5. FIG. 12 is a graph showing radiation efficiency of the antenna structure when a matching circuit is provided with a specific inductance and capacitance in the antenna structure shown in FIG. 5. FIG. 13 is an S parameter (scattering parameter) of the antenna structure when the first switching element in the antenna structure shown in FIG. 6 is set to have inductances with different inductance values, and the second switching element is an inductance having an inductance value of 5 nH. Graph. 14 is an S parameter (scattering parameter) of the antenna structure when the first switching element of the antenna structure shown in FIG. 6 is set to have inductances with different inductance values, and the second switching element is an inductance having an inductance value of 10 nH. Graph. 15 is an S parameter (scattering parameter) of the antenna structure when the first switching element of the antenna structure shown in FIG. 6 is set to have inductances with different inductance values, and the second switching element is an inductance having an inductance value of 15 nH. Graph. Figure 16 is a graph showing S-parameters (scattering parameters) of the second antenna in the antenna structure shown in Figure 1. Figure 17 is a graph showing the radiation efficiency of the second antenna in the antenna structure shown in Figure 1. Figure 18 is a graph showing the total radiation efficiency of the second antenna in the antenna structure shown in Figure 1. Figure 19 is a schematic view showing the structure of an antenna in a second preferred embodiment of the present invention. Figure 20 is a circuit diagram showing the antenna structure of Figure 19 provided with a matching circuit. 21 is a circuit diagram showing a switching circuit and a filter circuit provided in the antenna structure shown in FIG. 19. Figure 22 is a graph showing S-parameters (scattering parameters) of the first antenna in the antenna structure shown in Figure 19. Figure 23 is a graph showing the radiation efficiency of the first antenna in the antenna structure shown in Figure 19. Figure 24 is a graph showing S-parameters (scattering parameters) of the second antenna in the antenna structure shown in Figure 19. Figure 25 is a graph showing the radiation efficiency of the second antenna in the antenna structure shown in Figure 19. Figure 26 is a graph showing the total radiation efficiency of the second antenna in the antenna structure shown in Figure 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. 28 is a schematic diagram of the wireless communication device of FIG. 27 from another angle. 29 is a schematic view showing the assembly of the wireless communication device shown in FIG. Figure 30 is a plan view showing the structure of the antenna shown in Figure 27; FIG. 31 is a schematic diagram showing the current flow of the antenna structure shown in FIG. 27 when operating in the 734-960 MHz band and the 2500-2690 MHz band. 32 is a schematic diagram of current flow when the antenna structure shown in FIG. 27 operates in the frequency band of 1805-2300 MHz. Figure 33 is a circuit diagram showing the antenna structure of Figure 27 provided with a matching circuit. FIG. 34 is a graph showing S-parameters (scattering parameters) of the antenna structure when the first matching elements in the antenna structure shown in FIG. 33 are set to different inductance values. 35 is a graph showing S-parameters (scattering parameters) of the antenna structure when the second matching elements in the antenna structure shown in FIG. 33 are set to different capacitance values. 36 is a graph showing S-parameters (scattering parameters) of the antenna structure when the third matching element in the antenna structure shown in FIG. 33 is set to different inductance values. 37 is a graph of S parameters (scattering parameters) when the antenna structure shown in FIG. 27 operates in a low frequency mode. 38 is a graph showing S-parameters (scattering parameters) of the antenna structure shown in FIG. 27 when operating in a medium- and high-frequency mode. Figure 39 is a graph showing the radiation efficiency of the antenna structure shown in Figure 27 when operating in a low frequency mode. Figure 40 is a graph showing the total radiation efficiency of the antenna structure shown in Figure 27 when operating in a low frequency mode. Figure 41 is a graph showing the radiation efficiency of the antenna structure shown in Figure 27 when operating in a medium and high frequency mode. Figure 42 is a graph showing the total radiation efficiency of the antenna structure shown in Figure 27 when operating in a medium and high frequency mode. 43a to 43h are schematic plan views of the antenna structure shown in Fig. 27. 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. Figure 45 is a schematic diagram of the wireless communication device of Figure 44 at another angle. Figure 46 is a schematic view showing the assembly of the wireless communication device shown in Figure 44. Figure 47 is a plan view showing the structure of the antenna shown in Figure 44. Figure 48 is a schematic diagram showing the current flow of the antenna structure shown in Figure 44. Fig. 49 is a circuit diagram showing the antenna structure of Fig. 44 provided with a matching circuit. Figure 50 is a graph showing S-parameters (scattering parameters) of the antenna structure when the extensions of the antenna structure shown in Figure 44 are of different lengths. Figure 51 is a graph showing S-parameters (scattering parameters) of the antenna structure when the second matching elements in the antenna structure shown in Figure 44 are set to different capacitance values. Figure 52 is a graph showing S-parameters (scattering parameters) of the antenna structure when the third matching element in the antenna structure shown in Figure 44 is set to a different capacitance value. Figure 53 is a graph showing the S parameter (scattering parameter) of the antenna structure shown in Figure 44. Figure 54 is a graph showing the radiation efficiency of the antenna structure shown in Figure 44. 55a to 55f are plan views of the antenna structure shown in Fig. 44.

no

100‧‧‧Antenna structure

11‧‧‧Shell

111‧‧‧ front box

112‧‧‧ Backplane

113‧‧‧Border

114‧‧‧ accommodating space

115‧‧‧End

116‧‧‧First side

117‧‧‧ second side

118‧‧‧First opening

119‧‧‧Second opening

120‧‧‧ slotting

121‧‧‧ first gap

122‧‧‧ second gap

123‧‧‧First breakpoint

124‧‧‧second breakpoint

A1‧‧‧first antenna segment

A2‧‧‧second antenna segment

12‧‧‧First grounding

13‧‧‧Second grounding

T1‧‧‧ first end

T2‧‧‧ second end

14‧‧‧Coupling

15‧‧‧ Parasitic

16‧‧‧ Radiation Department

200‧‧‧Wireless communication device

201‧‧‧Display unit

202‧‧‧First electronic components

203‧‧‧Second electronic components

Claims (20)

An antenna structure includes a housing, a first grounding portion, a second grounding portion, a coupling portion, and a first feeding source, the housing including a front frame, a back plate, and a frame, the frame being sandwiched by the front frame a slot is formed in the frame, and the first frame and the first break point are opened on the front frame, and the first slot and the first break point are connected to the slot. And extending to the front frame, wherein the slot, the first slot and the first break point jointly divide a first antenna segment from the housing, and one end of the first ground portion is electrically connected to the a first antenna segment, the other end is grounded, the second ground portion is spaced apart from the first ground portion, and one end is electrically connected to the first antenna segment, and the other end is grounded, and one end of the coupling portion is electrically connected to The first feed source is spaced apart from the first antenna segment, and a current from the first feed source is coupled to the first antenna segment by the coupling portion. The antenna structure of claim 1, wherein the frame comprises at least a tip end portion, a first side portion and a second side portion, the first side portion and the second side portion respectively connecting the end portion The first grounding portion includes a first grounding portion and a first connecting portion, and one end of the first grounding portion is grounded, and one end of the first connecting portion is connected to the end portion. Electrically connected to the first grounding segment and extending in a direction parallel to the first side portion and adjacent to the end portion to be electrically connected to the first antenna segment, the second ground portion including a second connection And a second connecting segment, one end of the second grounding segment is grounded, one end of the second connecting segment is electrically connected to the second grounding segment, and is parallel to the first side portion and adjacent to the end portion Extending in a direction to electrically connect with the first antenna segment, the coupling portion includes a first feeding segment, a first coupling segment and a second coupling segment, one end of the first feeding segment being electrically connected to the a first feed source, the other end electrically connected to the first coupling segment, the first One end of a coupling section is perpendicularly connected to the first feeding section away from one end of the first feeding source, and the other end extends in a direction parallel to the first side and adjacent to the end portion, the second One end of the coupling section is vertically connected to the end of the first coupling section away from the first feeding section, and extends in a direction parallel to the end portion and adjacent to the first side portion and the second side portion, respectively. Further forming a T-shaped structure with the first coupling segment, after current enters from the first feed source, will flow through the coupling portion, and the coupling portion is coupled to the first antenna segment, Then, the first ground segment and the second ground segment are grounded, thereby exciting the first mode to generate a radiation signal of the first frequency band. The antenna structure of claim 2, wherein the first antenna segment, the first ground portion, the second ground portion, the coupling portion, and the first feed source together constitute a first day a first antenna includes a matching circuit, the matching circuit is electrically connected to the first ground portion, the second ground portion, and the coupling portion, thereby adjusting and optimizing a bandwidth of the first antenna Impedance matching. The antenna structure of claim 3, wherein the matching circuit comprises a first matching element, a second matching element, and a third matching element, one end of the first matching element being electrically connected to the first feed The other end is electrically connected to the first feed source, one end of the second matching component is electrically connected to the first ground segment, and the other end is grounded, and one end of the third matching component is electrically connected to the The second ground segment is described, and the other end is grounded. The antenna structure of claim 4, wherein the antenna structure further comprises a parasitic portion, the parasitic portion being spaced apart from the coupling portion, and flowing when current flows from the first feed source The high frequency bandwidth of the first mode is widened by the coupling portion and coupled to the parasitic portion by the coupling portion. The antenna structure of claim 5, wherein the parasitic portion includes a third ground segment, a first parasitic segment, and a second parasitic segment, one end of the third ground segment being vertically connected to the first parasitic a segment, the other end is grounded, one end of the first parasitic segment is electrically connected to the third ground segment, and the other end extends in a direction parallel to the second coupling segment and adjacent to the second side portion, the second The parasitic segment is vertically connected to the first parasitic segment away from one end of the third ground segment and extends in a direction parallel to the first side portion and away from the end portion. The antenna structure of claim 6, wherein the matching circuit further comprises a fourth matching component, one end of the fourth matching component being electrically connected to the third grounding segment and the other end being grounded. The antenna structure of claim 2, wherein the front frame is provided with a second slot and a second break point, and the second slot and the second break point are both connected to the slot and extend to Separating the front frame, the slot, the second slot and the second break point jointly divide a second antenna segment from the housing, the antenna structure further comprising a radiating portion and a second feeding source, One end of the radiating portion is electrically connected to the second feeding source, and the other end is electrically connected to the second antenna segment, and when the current second feeding source enters, it will flow through the radiating portion and borrow Flowing from the radiating portion to the second antenna segment, thereby exciting a second mode to generate a radiation signal of the second frequency band, the frequency of the first frequency band being higher than the frequency of the second frequency band. The antenna structure of claim 8, wherein the radiating portion comprises a second feeding section, a fourth grounding section, a first radiating section and a second radiating section, and one end of the second feeding section is electrically Connected to the second feed source, the other end is electrically connected to the first radiating segment, one end of the fourth ground segment is grounded, and the other end is electrically connected to the first radiating segment, the first radiating segment One end is vertically connected to the second feeding section away from one end of the second feeding source, and extends in a direction parallel to the end portion and adjacent to the first side portion, and the fourth The grounding section is vertically connected away from one end of the backboard, and then passes over the fourth grounding section to continue extending in a direction parallel to the end portion and adjacent to the first side portion, and one end of the second radiating section is connected The first radiating section is away from one end of the second feeding section, and the other end extends in a direction parallel to the first side portion and adjacent to the end portion until being electrically connected to the second antenna section. The antenna structure of claim 9, wherein the second antenna segment, the radiating portion, and the second feed source together constitute a second antenna, and the second antenna includes a switching circuit. The switching circuit is electrically connected to the second feeding segment and the fourth ground segment to adjust the second frequency band. The antenna structure of claim 10, wherein the switching circuit comprises a first switching element and a second switching element, one end of the first switching element is electrically connected to the second feeding section, and the other end And electrically connected to the second feed source, one end of the second switching element is electrically connected to the fourth ground segment, and the other end is grounded. The antenna structure of claim 11, wherein the second antenna further comprises a filter circuit electrically connected between the first switching element and the second feed source, To suppress high frequency harmonic modes and improve isolation between the first antenna and the second antenna. The antenna structure of claim 12, wherein the filter circuit comprises an inductor, a first capacitor and a second capacitor, the inductor being connected in series between the first switching element and the second feed source One end of the first capacitor is electrically connected between the inductor and the second feed source, and the other end is grounded, and one end of the second capacitor is electrically connected to the inductor and the first switching element. The other end is grounded. The antenna structure of claim 12, wherein the filter circuit comprises a first inductor, a second inductor, and a capacitor, wherein the first inductor and the second inductor are connected in series to the first switching component and the second feedback Between the sources, one end of the capacitor is electrically connected between the first inductor and the second inductor, and the other end is grounded. The antenna structure of claim 8, wherein the slot, the first slot, the second slot, the first breakpoint, and the second breakpoint are filled with an insulating material. The antenna structure of claim 1, wherein the backboard is a single metal piece integrally formed, the backboard is directly connected to the frame, and there is no gap between the backboard and the frame, the backboard There are no slots, broken wires or breakpoints for separating the insulation of the backplane. A wireless communication device comprising the antenna structure according to any one of claims 1 to 16. The wireless communication device of claim 17, wherein the wireless communication device further comprises a display unit, the front frame, the backboard and the frame constitute a casing of the wireless communication device, and the front frame is provided with an opening The display unit has a display plane, the display plane is exposed to the opening, and the display plane is disposed in parallel with the backboard. The wireless communication device of claim 17, wherein the wireless communication device further includes a headphone interface module and a USB module, and the frame is further provided with a first opening and a second opening, The first opening corresponds to the earphone interface module, so that the earphone interface module is exposed from the first opening portion; the second opening corresponds to the USB module, and is used for The first module and the second ground portion are respectively disposed on two sides of the earphone interface module, and the coupling portion is disposed on the first Between the grounding portion and the USB module. The wireless communication device of claim 17, wherein the wireless communication device further comprises 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.