Antenna structure and wireless communication device having the same

Abstract

The application provides an antenna structure, which comprises a metal frame, a feeding part, a first grounding part, a second grounding part, a first radiation part, a second radiation part and a third radiation part. When the feeding part feeds current, the current flows through the first radiation part, and flows to the second breakpoint coupled to the third radiation part, and then is grounded through the second grounding part, thereby exciting a first working mode to generate a first frequency band radiation signal; when the feeding part feeds current, the current flows through the first radiation part, and flows to the first breakpoint and the third breakpoint coupled to the second radiation part, and then is grounded through the first grounding part, thereby exciting a second working mode to generate a second frequency band radiation signal. The application also provides a wireless communication device with the antenna structure.

Description

Technical Field

[0001] This invention relates to an antenna structure and a wireless communication device having the antenna structure. Background Technology

[0002] With the continuous development and evolution of intelligent mobile communication, mobile phones have become an essential part of people's lives. Today's mobile phones are moving towards more diverse functions, thinner and lighter designs, full-screen displays, and faster and more efficient data transmission, resulting in increasingly limited space for antenna design. In the development of full-screen smartphones, designing full-band antennas within extremely limited space requires not only mounting the antenna on a metal frame but also understanding the frequency impacts caused by structural changes. Summary of the Invention

[0003] This application provides an antenna structure for use in a wireless communication device. The antenna structure includes a metal frame, a feed portion, a first ground portion, and a second ground portion.

[0004] The metal frame has a first break, a second break, and a third break; the metal frame between the first break and the second break forms a first radiating portion; the metal frame between the first break and the third break, and the end of the metal frame on the side of the third break away from the first radiating portion near the third break form a second radiating portion; the metal frame on the side of the second break away from the first radiating portion forms a third radiating portion.

[0005] The feed section and the first ground section are spaced apart and are both electrically connected to the first radiating section; the second ground section is located near the second break point in the third radiating section and is electrically connected to the third radiating section.

[0006] When current is fed into the feed section, the current flows through the first radiating section and then flows to the second break point to couple to the third radiating section. It is then grounded through the second grounding section, thereby exciting the first working mode to generate a radiation signal in the first frequency band.

[0007] When current is fed into the feed section, the current flows through the first radiating section and then flows to the first break point and the third break point to couple to the second radiating section. It is then grounded through the first grounding section, thereby exciting the second operating mode to generate a radiated signal in the second frequency band.

[0008] The antenna structure further includes a first matching circuit, a second matching circuit, and a third matching circuit; the wireless communication device further includes a battery and a first circuit board; the feed section is electrically connected to the feed source of the first circuit board through the first matching circuit to feed current; the first ground section is grounded through the second matching circuit to provide ground for the antenna structure; the second ground section is grounded through the third matching circuit to provide ground for the antenna structure.

[0009] The battery and the second radiating part are spaced apart to form a first side groove; the inductance values ​​of the first matching circuit, the second matching circuit and the third matching circuit are all set to a fixed value. The high-frequency mode shift is adjusted by adjusting the length of the first side groove, and the high-frequency mode offset is adjusted by cooperating with the first matching circuit.

[0010] The inductance values ​​of the first matching circuit, the second matching circuit, and the third matching circuit are all set to a fixed value. The intermediate frequency mode shift is adjusted by adjusting the length of the second side slot, and in conjunction with the first matching circuit, the intermediate frequency mode offset is adjusted.

[0011] The wireless communication device further includes a second circuit board, and the antenna structure further includes a first switching switch; the second circuit board is disposed near the second radiating part next to the third break point; the first switching switch is disposed at a distance between the second radiating part and the second circuit board; one end of the first switching switch is grounded, and the other end is electrically connected to the second radiating part to adjust the high frequency band of the second radiating part.

[0012] The inductance values ​​of the first matching circuit, the second matching circuit, and the third matching circuit are all set to a fixed value. The length of the first side slot is also fixed. The inductance value of the first switching circuit is adjusted to adjust the offset of the high-frequency mode, so as to achieve the signal reception and transmission length of the high-frequency band.

[0013] The antenna structure further includes a second switching switch, which is disposed between the first circuit board and the third radiating part; one end of the second switching switch is grounded and the other end is electrically connected to the third radiating part to adjust the intermediate frequency band of the third radiating part.

[0014] A second side slot is formed between the first circuit board and the third radiating part; the inductance values ​​of the second matching circuit and the third matching circuit are both set to a fixed value, and the length of the second side slot is also fixed. The offset of the intermediate frequency mode is adjusted by adjusting the inductance value of the second switching circuit to achieve the length of the signal receiving and transmitting electrical appliances in the intermediate frequency band.

[0015] The wireless communication device further includes a second circuit board, and the antenna structure further includes a first switching switch and a second switching switch; the second circuit board is disposed between the second radiating part and the speaker assembly; the first switching switch is disposed between the second radiating part and the second circuit board; one end of the first switching switch is grounded, and the other end is electrically connected to the second radiating part to adjust the high-frequency band of the second radiating part;

[0016] The second switching switch is disposed between the first circuit board and the third radiating part; one end of the second switching switch is grounded and the other end is electrically connected to the third radiating part to adjust the intermediate frequency band of the third radiating part.

[0017] The inductance values ​​of the second matching circuit and the third matching circuit are both set to a fixed value, and the lengths of the first side slot and the second side slot are also fixed. By synchronously adjusting the inductance values ​​of the first switching circuit and the second switching circuit, the lengths of the signal receiving and transmitting devices in the intermediate frequency and high frequency bands can be adjusted.

[0018] This application also provides a wireless communication device, which includes an antenna structure, the antenna structure including a metal frame, a feed portion, a first ground portion and a second ground portion;

[0019] The metal frame has a first break, a second break, and a third break; the metal frame between the first break and the second break forms a first radiating portion; the metal frame between the first break and the third break, and the end of the metal frame on the side of the third break away from the first radiating portion near the third break form a second radiating portion; the metal frame on the side of the second break away from the first radiating portion forms a third radiating portion.

[0020] The feed section and the first ground section are spaced apart and are both electrically connected to the first radiating section; the second ground section is located near the second break point in the third radiating section and is electrically connected to the third radiating section.

[0021] When current is fed into the feed section, the current flows through the first radiating section and then flows to the second break point to couple to the third radiating section. It is then grounded through the second grounding section, thereby exciting the first working mode to generate a radiation signal in the first frequency band.

[0022] When current is fed into the feed section, the current flows through the first radiating section and then flows to the first break point and the third break point to couple to the second radiating section. It is then grounded through the first grounding section, thereby exciting the second operating mode to generate a radiated signal in the second frequency band.

[0023] The antenna structure further includes a first matching circuit, a second matching circuit, and a third matching circuit; the wireless communication device further includes a battery and a first circuit board; the feed section is electrically connected to the feed source of the battery through the first matching circuit to feed current; the first ground section is grounded through the second matching circuit to provide ground for the antenna structure; the second ground section is grounded through the third matching circuit to provide ground for the antenna structure.

[0024] The battery and the second radiating part are spaced apart to form a first side groove; the inductance values ​​of the first matching circuit, the second matching circuit and the third matching circuit are all set to a fixed value. The high-frequency mode shift is adjusted by adjusting the length of the first side groove, and the high-frequency mode offset is adjusted by cooperating with the first matching circuit.

[0025] The inductance values ​​of the first matching circuit, the second matching circuit, and the third matching circuit are all set to a fixed value. The intermediate frequency mode shift is adjusted by adjusting the length of the second side slot, and in conjunction with the first matching circuit, the intermediate frequency mode offset is adjusted.

[0026] The wireless communication device further includes a second circuit board, and the antenna structure further includes a first switching switch; the second circuit board is disposed near the second radiating part next to the third break point; the first switching switch is disposed at a distance between the second radiating part and the second circuit board; one end of the first switching switch is grounded, and the other end is electrically connected to the second radiating part to adjust the high frequency band of the second radiating part.

[0027] The inductance values ​​of the first matching circuit, the second matching circuit, and the third matching circuit are all set to a fixed value. The length of the first side slot is also fixed. The inductance value of the first switching circuit is adjusted to adjust the offset of the high-frequency mode, so as to achieve the signal reception and transmission length of the high-frequency band.

[0028] The antenna structure further includes a second switching switch, which is disposed between the first circuit board and the third radiating part; one end of the second switching switch is grounded and the other end is electrically connected to the third radiating part to adjust the intermediate frequency band of the third radiating part.

[0029] A second side slot is formed between the first circuit board and the third radiating part; the inductance values ​​of the second matching circuit and the third matching circuit are both set to a fixed value, and the length of the second side slot is also fixed. The offset of the intermediate frequency mode is adjusted by adjusting the inductance value of the second switching circuit to achieve the length of the signal receiving and transmitting electrical appliances in the intermediate frequency band.

[0030] The wireless communication device further includes a second circuit board, and the antenna structure further includes a first switching switch and a second switching switch; the second circuit board is disposed between the second radiating part and the speaker assembly; the first switching switch is disposed between the second radiating part and the second circuit board; one end of the first switching switch is grounded, and the other end is electrically connected to the second radiating part to adjust the high-frequency band of the second radiating part;

[0031] The second switching switch is disposed between the first circuit board and the third radiating part; one end of the second switching switch is grounded and the other end is electrically connected to the third radiating part to adjust the intermediate frequency band of the third radiating part.

[0032] The inductance values ​​of the second matching circuit and the third matching circuit are both set to a fixed value, and the lengths of the first side slot and the second side slot are also fixed. By synchronously adjusting the inductance values ​​of the first switching circuit and the second switching circuit, the lengths of the signal receiving and transmitting devices in the intermediate frequency and high frequency bands can be adjusted.

[0033] The antenna structure and wireless communication device with the antenna structure provided in this application conform to the signal reception and transmission functions of intermediate frequency (1710~2170MHz) and high frequency (2496~2690MHz) covered by 4G LTE mobile phones. At the same time, it adds fine structural adjustments and antenna circuit switching platform, and proposes adjustment mechanisms for frequency changes such as intermediate frequency and high frequency. Attached Figure Description

[0034] Figure 1 This is a perspective view of the wireless communication device according to the first embodiment of this application;

[0035] Figure 2 This is a perspective view of the wireless communication device according to the first embodiment of this application from another angle;

[0036] Figure 3 This is a structural diagram of the wireless communication device according to the first embodiment of this application;

[0037] Figure 4 The circuit diagrams are of the first matching circuit, the second matching circuit, and the third matching circuit according to embodiments of this application.

[0038] Figure 5 The image shows the scattering parameters (S-parameters) of the antenna structure of the first embodiment of this application under different length values ​​of the first side slot;

[0039] Figure 6 This is a graph showing the S-parameters of the antenna structure of the first embodiment of this application under different lengths of the second side slot;

[0040] Figure 7This is a structural diagram of a wireless communication device according to a second embodiment of this application;

[0041] Figure 8 This is a circuit diagram of the first switching switch according to the second embodiment of this application;

[0042] Figure 9 This is a graph showing the S-parameters of the antenna structure according to the second embodiment of this application under different inductance values ​​in the first switching circuit.

[0043] Figure 10 This is a structural diagram of a wireless communication device according to a third embodiment of this application;

[0044] Figure 11 This is a circuit diagram of the second switching switch according to the third embodiment of this application;

[0045] Figure 12 This is a graph showing the S-parameters of the antenna structure according to the third embodiment of this application under different inductance values ​​in the second switching circuit.

[0046] Figure 13 This is a structural diagram of a wireless communication device according to the fourth embodiment of this application;

[0047] Figure 14 This is an S-parameter curve of the antenna structure according to the fourth embodiment of this application, showing the synchronous change of inductance values ​​in the first and second switching circuits.

[0048] Explanation of main component symbols

[0049] Wireless communication device 1

[0050] Antenna structure 100

[0051] First matching circuit 110

[0052] First inductor L1

[0053] Second inductor L2

[0054] Capacitor C

[0055] Second matching circuit 120

[0056] Third inductor L3

[0057] Third matching circuit 130

[0058] Fourth inductor L4

[0059] First switching circuit 140

[0060] Fifth inductor L5

[0061] Second switching circuit 150

[0062] Sixth inductor L6

[0063] Metal frame 200

[0064] First side 201

[0065] Second side 202

[0066] Third side 203

[0067] First metal segment 204

[0068] Second metal segment 205

[0069] Third metal segment 206

[0070] Fourth metal segment 207

[0071] First side groove 210

[0072] Second side groove 220

[0073] First breakpoint 230

[0074] Second breakpoint 240

[0075] Third breakpoint 250

[0076] Connector assembly 300

[0077] Speaker assembly 400

[0078] 500 batteries

[0079] First circuit board 600

[0080] Second circuit board 700

[0081] Feed Section 101

[0082] First grounding part 102

[0083] Second grounding part 103

[0084] First Radiation Section 104

[0085] Second Radiation Section 105

[0086] Third Radiation Section 106

[0087] First switching switch 107

[0088] Second switching switch 108

[0089] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0090] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0091] See Figures 1 to 3 This is a structural diagram of a wireless communication device according to the first embodiment of this application. The wireless communication device 1 includes an antenna structure 100, a connector assembly 300, a speaker assembly 400, a battery 500, and a first circuit board 600.

[0092] The antenna structure 100 includes a metal frame 200, a feed section 101, a first ground section 102, a second ground section 103, a first radiating section 104, a second radiating section 105, a third radiating section 106, a first matching circuit 110, a second matching circuit 120, and a third matching circuit 130.

[0093] The metal frame 200 is generally ring-shaped and is made of metal or other conductive material. The metal frame 200 includes at least a first side 201, a second side 202, and a third side 203. The second side 202 and the third side 203 are respectively connected to opposite sides of the first side 201. In this embodiment, the first side 201 is the bottom edge of the metal frame 200. The first side 201 has a first breakpoint 230 and a second breakpoint 240 spaced apart. In this embodiment, the first breakpoint 230 and the second breakpoint 240 are respectively located near both ends of the first side 201. The second side 202 has a third breakpoint 250 near the end of the first side 201.

[0094] The first breakpoint 230, the second breakpoint 240, and the third breakpoint 250 divide the metal frame 200 into a first metal segment 204, a second metal segment 205, a third metal segment 206, and a fourth metal segment 207. Specifically, the metal frame between the first breakpoint 230 and the second breakpoint 240 is the first metal segment 204; the metal frame between the first breakpoint and the third breakpoint is the second metal segment 205; the metal frame 200 on the side of the third breakpoint 250 away from the first metal segment 204 is the third metal segment 206; and the metal frame 200 on the side of the second breakpoint 240 away from the first metal segment 204 is the fourth metal segment 207.

[0095] The first metal segment 204 constitutes the first radiating part 104, the second metal segment 205 and the third metal segment 206 near the end of the second metal segment 205 constitute the second radiating part 105, and the fourth metal segment 207 constitutes the third radiating part 106.

[0096] The feed section 101 is electrically connected to the feed source of the first circuit board 600 through the first matching circuit 110 to feed current. The first ground section 102 is grounded through the second matching circuit 120 to provide ground for the antenna structure 100. The second ground section 103 is grounded through the third matching circuit 130 to provide ground for the antenna structure 100.

[0097] See Figure 4 The first matching circuit 110 includes a first inductor L1, a second inductor L2, and a capacitor C. One end of the first inductor L1 is electrically connected to the feed source of the first circuit board 600, and the other end is electrically connected to the feed portion 101 of the antenna structure 100. One end of the second inductor L2 and one end of the capacitor C are connected between the first inductor L1 and the feed portion 101, respectively. The other ends of the second inductor L2 and the capacitor C are grounded. The second matching circuit 120 includes a third inductor L3. One end of the third inductor L3 is electrically connected to the first ground portion 102 of the antenna structure 100, and the other end of the third inductor L3 is grounded. The third matching circuit 130 includes a fourth inductor L4. One end of the fourth inductor L4 is electrically connected to the second ground portion 103 of the antenna structure 100, and the other end of the fourth inductor L4 is grounded.

[0098] The battery 500 is disposed between the second side 202 and the third side 203. A first side groove 210 is formed between the battery 500 and the second side 202. The first circuit board 600 is disposed between the first side 201 and the third side 203. A second side groove 220 is formed between the first circuit board 600 and the third side 203. The first breakpoint 230, the second breakpoint 240, and the third breakpoint 250 are all connected to the first side groove 210 and the second side groove 220.

[0099] The connector assembly 300 is located between the first radiating portion 104 and the first circuit board 600. Near the connector assembly 300, the first radiating portion 104 has an opening for connecting the connector assembly 300 to an external device. The speaker assembly 400 is located between the first circuit board 600 and the second side 202.

[0100] When current is fed into the feed section 101, the current flows through the first radiating section 104 and then to the second break point 240, coupling to the third radiating section 106. It is then grounded through the second grounding section 103, thereby exciting the first operating mode to generate a radiated signal in the first frequency band. In some embodiments, the first operating mode may include a high-frequency mode, and the frequency of the first frequency band may include 1710–2170 MHz.

[0101] When current is fed into the feed section 101, the current flows through the first radiating section 104, and then flows to the first break point 230 and the third break point to couple to the second radiating section 105. It then grounds through the first grounding section 102, thereby exciting the second operating mode to generate a radiated signal in the second frequency band. In some embodiments, the second operating mode may include an intermediate frequency mode, and the frequency of the second frequency band may include 2496–2690 MHz.

[0102] See Figure 4 In this embodiment, the inductance values ​​of the first matching circuit 110, the second matching circuit 120 and the third matching circuit 130 are all set to a fixed value. The high-frequency (2496-2690MHz) mode shift is adjusted by adjusting the length of the first side slot 210, so as to achieve the adjustment of the high-frequency (2496-2690MHz) mode offset.

[0103] See Figure 5 The above are scattering parameter (S-parameter) curves of the antenna structure 100 according to the first embodiment of this application under different length values ​​of the first side slot 210. Curve S501 is the S-parameter curve of the antenna structure 100 when the length of the first side slot 210 is 27.3 mm, and curve S502 is the S-parameter curve of the antenna structure 100 when the length of the first side slot 210 is 28.3 mm. Comparing curve S501 and curve S502, the high-frequency (2496-2690MHz) mode is shifted towards 2690MHz. Curve S503 is the S-parameter curve of the antenna structure 100 when the length of the first side slot 210 is 29.3 mm. Comparing curve S503 and curve S502, it can be clearly seen that the high-frequency (2496-2690MHz) mode is shifted towards 2496MHz.

[0104] Obviously, when the length of the first side slot 210 is shortened, the high-frequency (2496-2690MHz) mode shifts to a higher frequency within its frequency range, and when the length of the first side slot 210 is increased, the high-frequency (2496-2690MHz) mode moves to a lower frequency within its frequency range.

[0105] See Figure 4 The inductance values ​​of the first matching circuit 110, the second matching circuit 120 and the third matching circuit 130 are all set to a fixed value. The intermediate frequency (1710-2170MHz) mode shift is adjusted by adjusting the length of the second side slot 220, so as to achieve the adjustment of the intermediate frequency (1710-2170MHz) mode offset.

[0106] See Figure 6The above are S-parameter curves of the antenna structure 100 according to the first embodiment of this application under different length values ​​of the second side slot 220. Curve S601 is the S-parameter curve of the antenna structure 100 when the length of the second side slot 220 is 19.2 mm, and curve S602 is the S-parameter curve of the antenna structure 100 when the length of the second side slot 220 is 21.2 mm. Comparing curves S601 and S602, the intermediate frequency (1710~2170MHz) mode shifts towards the 1920~2170MHz range. Curve S603 is the S-parameter curve of the antenna structure 100 when the length of the second side slot 220 is 23.2 mm. Comparing curves S603 and S602, it can be clearly seen that the intermediate frequency (1710~2170MHz) mode shifts towards the 1710~1880MHz range.

[0107] Obviously, when the length of the second side slot 220 decreases, the intermediate frequency mode (1710-2170MHz) shifts to a higher frequency within its frequency range, and when the length of the second side slot 220 increases, the intermediate frequency mode (1710-2170MHz) shifts to a lower frequency within its frequency range.

[0108] See Figure 7 This is a structural diagram of a wireless communication device according to the second embodiment of this application;

[0109] Compared with the wireless communication device in the first embodiment, the wireless communication device 1 in the second embodiment further includes a second circuit board 700, and the antenna structure 100 further includes a first switching switch 107. The second circuit board 700 is disposed between the second side 202 and the speaker assembly 400. The first switching switch 107 is disposed between the second side 202 and the second circuit board 700. One end of the first switching switch 107 is grounded, and the other end is electrically connected to the second radiating part 105 to adjust the high-frequency band of the second radiating part 105.

[0110] See Figure 8 The first switching circuit 140 includes the first switching switch 107 and the fifth inductor L5. One end of the fifth inductor L5 is connected to the first switching switch 107, and the other end is grounded.

[0111] See Figure 7The inductance values ​​of the first matching circuit 110, the second matching circuit 120 and the third matching circuit 130 are all set to a fixed value, and the length of the first side slot 210 is also fixed. The inductance value of the first switching circuit 140 is then adjusted to adjust the offset of the high-frequency (2496-2690MHz) mode, so as to achieve the signal reception and transmission length of the high-frequency (2496-2690MHz) band.

[0112] See Figure 9 The S-parameter curves of the antenna structure 100 according to the second embodiment of this application under different inductance values ​​of the first switching circuit 140 are shown. Curve S901 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 is 0 nanohenries (nH), and curve S902 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 is 9.5nH. Comparing curves S901 and S902, it can be clearly seen that its high-frequency (2496~2690MHz) mode shifts towards 2690MHz. Curve S903 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 is 39nH. Comparing curves S903 and S902, it can be clearly seen that its high-frequency (2496~2690MHz) mode shifts towards 2496MHz.

[0113] Obviously, when the inductance value of the first switching circuit 140 decreases, the high-frequency (2496-2690MHz) mode shifts to a higher frequency within its frequency range, and when the inductance value of the first switching circuit 140 increases, the high-frequency (2496-2690MHz) mode shifts to a lower frequency within its frequency range.

[0114] See Figure 10 This is a structural diagram of a wireless communication device according to the third embodiment of this application;

[0115] Compared with the wireless communication device in the first embodiment, the wireless communication device in the third embodiment further includes a second switching switch 108 in the antenna structure 100. The second switching switch 108 is disposed between the first circuit board 600 and the third side 203. One end of the second switching switch 108 is grounded, and the other end is electrically connected to the third radiating part 106 to adjust the intermediate frequency band of the third radiating part 106.

[0116] See Figure 11 The second switching circuit 150 includes the second switching switch 108 and the sixth inductor L6. One end of the sixth inductor L6 is connected to the second switching switch 108, and the other end is grounded.

[0117] See Figure 10 The inductance values ​​of the second matching circuit 120 and the third matching circuit 130 are both set to a fixed value, and the length of the second side slot 220 is also fixed. The inductance value of the second switching circuit 150 is then adjusted to adjust the offset of the intermediate frequency (1710~2170MHz) mode, so as to achieve the length of the signal receiving and transmitting electrical appliances in the intermediate frequency (1710~2170MHz) band.

[0118] See Figure 12 The above are S-parameter curves of the antenna structure 100 according to the third embodiment of this application under different inductance values ​​of the second switching circuit 150. Curve S201 is the S-parameter curve of the antenna structure 100 when the inductance value of the second switching circuit 150 is 0nH, and curve S202 is the S-parameter curve of the antenna structure 100 when the inductance value of the second switching circuit 150 is 3.6nH. Comparing curves S201 and S202, it can be clearly seen that the mid-frequency (1710~2170MHz) mode shifts towards 2170MHz. Curve S203 is the S-parameter curve of the antenna structure 100 when the inductance value of the second switching circuit 150 is 8nH. Comparing curves S203 and S202, it can be clearly seen that the mid-frequency (1710~2170MHz) mode shifts towards 1710MHz.

[0119] Obviously, when the inductance value of the second switching circuit 150 decreases, the intermediate frequency (1710-2170MHz) mode shifts to a higher frequency range, and when the inductance value of the second switching circuit 150 increases, the intermediate frequency (1710-2170MHz) mode shifts to a lower frequency range.

[0120] See Figure 13 This is a structural diagram of a wireless communication device according to the fourth embodiment of this application;

[0121] Compared with the wireless communication device in the first embodiment, the wireless communication device 1 in the fourth embodiment further includes a second circuit board 700, and the antenna structure 100 further includes a first switching switch 107 and a second switching switch 108. The second circuit board 700 is disposed between the speaker assembly 400 and the second side 202. The first switching switch 107 is disposed between the second circuit board 700 and the second side 202. One end of the first switching switch 107 is grounded, and the other end is electrically connected to the second radiating part 105 to adjust the high-frequency band of the second radiating part 105. The second switching switch 108 is disposed between the first circuit board 600 and the third side 203. One end of the second switching switch 108 is grounded, and the other end is electrically connected to the third radiating part 106 to adjust the intermediate frequency band of the third radiating part 106.

[0122] See Figure 13 The inductance values ​​of the second matching circuit 120 and the third matching circuit 130 are both set to a fixed value, and the lengths of the first side slot 210 and the second side slot 220 are also fixed. By synchronously adjusting the inductance values ​​of the first switching circuit 140 and the second switching circuit 150, the lengths of the signal receiving and transmitting devices in the intermediate frequency (1710~2170MHz) and high frequency (2496~2690MHz) bands can be adjusted.

[0123] See Figure 14This is an S-parameter curve diagram of the antenna structure 100 according to the fourth embodiment of this application under the synchronous change of the inductance values ​​of the first switching circuit 140 and the second switching circuit 150. Curve S901 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 and the second switching circuit 150 is 0nH. Curve S402 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 and the second switching circuit 150 is 3nH. Curve S403 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 and the second switching circuit 150 is 6nH. Curve S404 is the S-parameter curve of the antenna structure 100 when the inductance value of the first switching circuit 140 and the second switching circuit 150 is 6nH. Curve S404 shows the S-parameter curve of antenna structure 100 when the inductance value of the first switching circuit 140 and the second switching circuit 150 is 9nH. Curve S405 shows the S-parameter curve of antenna structure 100 when the inductance value of the first switching circuit 140 and the second switching circuit 150 is 12nH. Comparing curves S901, S902, S903, S904 and S905, it can be clearly seen that by synchronously adjusting the inductance values ​​of the first switching circuit 140 and the second switching circuit 150, when the inductance value is smaller, both the intermediate frequency (1710~2170MHz) mode and the high frequency (2496~2690MHz) mode shift towards the high frequency. When the inductance value is larger, both the intermediate frequency (1710~2170MHz) mode and the high frequency (2496~2690MHz) mode shift towards the intermediate frequency.

[0124] The antenna structure and wireless communication device having the antenna structure provided in this application conform to the signal reception and transmission functions of intermediate frequency (1710-2170MHz) and high frequency (2496-2690MHz) covered by 4G LTE mobile phones. At the same time, it adds fine structural adjustments and an antenna circuit switching platform, and proposes an adjustment mechanism for frequency changes such as intermediate frequency and high frequency.

[0125] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention should not depart from the spirit and scope of the present invention. Those skilled in the art can also make other changes within the spirit of the present invention and use them in the design of the present invention, as long as they do not deviate from the technical effects of the present invention. These changes made according to the spirit of the present invention should all be included within the scope of protection claimed by the present invention.

Claims

1. An antenna structure used in a wireless communication device, characterized in that, The antenna structure includes a metal frame, a feed section, a first ground section, and a second ground section; The metal frame has a first break, a second break, and a third break; the metal frame between the first break and the second break forms a first radiating portion; the metal frame between the first break and the third break, and the end of the metal frame on the side of the third break away from the first radiating portion near the third break form a second radiating portion; the metal frame on the side of the second break away from the first radiating portion forms a third radiating portion. The feed section and the first ground section are spaced apart and are both electrically connected to the first radiating section; the second ground section is located near the second break point in the third radiating section and is electrically connected to the third radiating section. When current is fed into the feed section, the current flows through the first radiating section and then flows to the second break point to couple to the third radiating section. It is then grounded through the second grounding section, thereby exciting the first working mode to generate a radiation signal in the first frequency band. When current is fed into the feed section, the current flows through the first radiating section and flows to the first break point and the third break point to couple to the second radiating section, and then grounds through the first grounding section, thereby exciting the second working mode to generate a radiation signal in the second frequency band. The antenna structure further includes a first matching circuit, a second matching circuit, and a third matching circuit; the wireless communication device further includes a battery and a first circuit board; The feed section is electrically connected to the feed source of the first circuit board through the first matching circuit to feed current; the first ground section is grounded through the second matching circuit to provide ground for the antenna structure; the second ground section is grounded through the third matching circuit to provide ground for the antenna structure. The battery and the second radiating part are spaced apart to form a first side groove; the inductance values ​​of the feed part, the first matching circuit and the second matching circuit are all set to a fixed value. The high-frequency mode shift is adjusted by adjusting the length of the first side groove, and the high-frequency mode offset is adjusted by cooperating with the first matching circuit.

2. The antenna structure as described in claim 1, characterized in that, A second side slot is formed between the first circuit board and the third radiating part; the inductance values ​​of the first matching circuit, the second matching circuit and the third matching circuit are all set to a fixed value. The intermediate frequency mode shift is adjusted by adjusting the length of the second side slot, so as to achieve the adjustment of the intermediate frequency mode offset.

3. The antenna structure as described in claim 2, characterized in that, The wireless communication device further includes a second circuit board, and the antenna structure further includes a first switching switch; the second circuit board is disposed near the second radiating part next to the third break point; the first switching switch is disposed at a distance between the second radiating part and the second circuit board; one end of the first switching switch is grounded, and the other end is electrically connected to the second radiating part to adjust the high frequency band of the second radiating part.

4. The antenna structure as described in claim 3, characterized in that, The inductance values ​​of the first matching circuit, the second matching circuit, and the third matching circuit are all set to a fixed value. The length of the first side slot is also fixed. The inductance value of the first switching switch is adjusted to adjust the offset of the high-frequency mode, so as to achieve the signal reception and transmission length of the high-frequency band.

5. The antenna structure as described in claim 1, characterized in that, The antenna structure further includes a second switching switch, which is disposed between the first circuit board and the third radiating part; one end of the second switching switch is grounded and the other end is electrically connected to the third radiating part to adjust the intermediate frequency band of the third radiating part.

6. The antenna structure as described in claim 5, characterized in that, A second side slot is formed between the first circuit board and the third radiating part; the inductance values ​​of the first matching circuit and the second matching circuit are both set to a fixed value, and the length of the second side slot is also fixed. The offset of the intermediate frequency mode is adjusted by adjusting the inductance value of the second switching circuit to achieve the length of the signal receiving and transmitting electrical appliances in the intermediate frequency band.

7. The antenna structure as described in claim 1, characterized in that, The wireless communication device further includes a second circuit board and a speaker assembly, and the antenna structure further includes a first switching switch and a second switching switch; the second circuit board is disposed between the second radiating part and the speaker assembly; the first switching switch is disposed between the second radiating part and the second circuit board; one end of the first switching switch is grounded, and the other end is electrically connected to the second radiating part to adjust the high-frequency band of the second radiating part; The second switching switch is disposed between the first circuit board and the third radiating part; one end of the second switching switch is grounded and the other end is electrically connected to the third radiating part to adjust the intermediate frequency band of the third radiating part.

8. The antenna structure as described in claim 7, characterized in that, A second side slot is formed between the first circuit board and the third radiating part; the inductance values ​​of the second matching circuit and the third matching circuit are both set to a fixed value, and the lengths of the first side slot and the second side slot are also fixed. By synchronously adjusting the inductance values ​​of the first switching circuit and the second switching circuit, the lengths of the signal receiving and transmitting devices in the intermediate frequency and high frequency bands can be adjusted.

9. A wireless communication device, characterized in that, The antenna structure includes any one of claims 1-8.

10. The wireless communication device as claimed in claim 9, characterized in that, The wireless communication device further includes a connector assembly and a speaker assembly. The connector assembly is located between the first radiating portion and the first circuit board. Near the first radiating portion and the connector assembly, the first radiating portion has an opening for connecting the connector assembly to an external device. The speaker assembly is located between the first circuit board and the second radiating portion.

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