Antenna structure and electronic equipment

Abstract

The utility model relates to an antenna structure and electronic equipment, the antenna structure is applied to the electronic equipment with a folding function, the electronic equipment comprises a first side and a second side which can be relatively folded and unfolded, the antenna structure comprises an antenna body arranged on the first side and a tuning branch knot arranged on the second side, and a folding screen is in a folding state. The tuning branch knot and the antenna body are at least partially overlapped, the antenna structure further comprises a parasitic tuning branch knot arranged on the second side, and the parasitic tuning branch knot is electrically connected with the tuning branch knot through at least one of a grounding connection mode and a coupling connection mode. According to the invention, the tuning branch which is at least partially overlapped with the antenna body and the parasitic tuning branch which is connected with the tuning branch are arranged, and the tuning branch and the parasitic tuning branch generate resonance with the antenna body in the folded state of the electronic equipment, so that the signal transmission performance of the antenna in the folded state of the electronic equipment is effectively improved; and the use experience of the user is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to an antenna structure and an electronic equipment. Background Art

[0002] At present, due to the increasing demand of users for large screen size and portability of electronic devices, the application of electronic devices with folding function is becoming more and more widespread. Since electronic components such as chips and antenna structures are mostly concentrated on one side in electronic devices with folding function, the performance and efficiency of the antenna will be greatly reduced when the electronic device is in the folded state compared with the unfolded state. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides an antenna structure and an electronic device.

[0004] According to a first aspect of the present disclosure, an antenna structure is provided, which is applied to an electronic device with a folding function, wherein the electronic device comprises a first side and a second side that can be relatively folded and unfolded, and the antenna structure comprises:

[0005] An antenna body, disposed on the first side;

[0006] a tuning branch, arranged on the second side, wherein the electronic device is in a folded state, the tuning branch and the antenna body are at least partially overlapped;

[0007] A parasitic tuning branch is arranged on the second side, and the parasitic tuning branch is electrically connected to the tuning branch through at least one connection mode of ground connection and coupling connection.

[0008] In a possible implementation manner, the parasitic tuning branches include at least one of magnetic parasitic branches and electric parasitic branches;

[0009] The magnetic parasitic branch and the tuning branch are grounded via a grounding branch, and the electrical parasitic branch is coupled to the tuning branch.

[0010] In a possible implementation manner, the parasitic tuning branches include the magnetic parasitic branches and the electric parasitic branches;

[0011] The magnetic parasitic branch is arranged on the top or the bottom of the electronic device, and the tuning branch and the electric parasitic branch are arranged on the side of the electronic device.

[0012] In a possible implementation, a gap is provided between the tuning branch and the electric parasitic branch, the electric parasitic branch comprises a main body branch and an extension branch connected to the main body branch, the extension branch and the main body branch are parallel to each other, and the extension branch and the tuning branch are staggered;

[0013] The extended branch extends between the tuning branch and the middle frame of the second side of the electronic device.

[0014] In a possible implementation manner, the electric parasitic branch is configured as a suspended branch;

[0015] Alternatively, one end of the electric parasitic branch away from the tuning branch is grounded.

[0016] In a possible implementation, the length of the extended branch is 11 mm to 14 mm.

[0017] In a possible implementation manner, a first tuning switch is provided at one end of the extended branch away from the break.

[0018] In a possible implementation, the magnetic parasitic branch includes a first section extending along the width direction of the electronic device, and a second section extending along the length direction of the electronic device, the first section is connected to the second section, and a preset angle is formed between the first section and the second section;

[0019] One end of the second segment away from the first segment is connected to the ground branch, and one end of the first segment away from the second segment is provided with a second tuning switch.

[0020] In a possible implementation manner, the tuning branch and the electrical parasitic branch are connected via a capacitive circuit.

[0021] In a possible implementation manner, a third tuning switch is provided at one end of the tuning branch close to the grounding branch, and the distance between the third tuning switch and the grounding branch is greater than or equal to 6 mm.

[0022] In a possible implementation, the antenna body includes an IFA antenna.

[0023] According to a second aspect of the present disclosure, an electronic device is provided, comprising a first housing and a second housing that can be folded and unfolded relative to each other, and the antenna structure according to the first aspect of the present disclosure.

[0024] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure sets up a tuning branch that at least partially overlaps with the antenna body and a parasitic tuning branch connected to the tuning branch. When the electronic device is in a folded state, the tuning branch and the parasitic tuning branch resonate with the antenna body, thereby effectively improving the signal transmission performance of the antenna in the folded state of the electronic device and improving the user experience.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] Figure 1 is a schematic diagram of an electronic device according to an exemplary embodiment

[0028] Figure 2 yes Figure 1 A partial enlarged view of area A.

[0029] Figure 3 yes Figure 1 A partial enlarged view of area B in the middle.

[0030] Figure 4 It is an efficiency curve diagram of the antenna after adopting the technical solution disclosed in the present invention. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] At present, due to the increasing demand of users for large screen size and portability of electronic devices, the application of electronic devices with folding function is becoming more and more widespread. Since electronic components such as chips and antenna structures are mostly concentrated on one side in electronic devices with folding function, the performance and efficiency of the antenna will be greatly reduced when the electronic device is in the folded state compared with the unfolded state.

[0033] In order to improve the performance of the antenna, it has been found through research that a tuning branch can be set on the folding side of the electronic device (relative to the base side of the electronic device, the chip, antenna, etc. of the electronic device are mostly set on the base side) to resonate with the antenna on the base side to improve the transmission performance of the antenna signal. However, due to the limited internal space of the electronic device, in most cases only one tuning branch is set. It is difficult to have a better effect on improving the performance of the antenna structure. Therefore, how to effectively reduce the loss of antenna performance when the electronic device is in the closed state has become the focus of the design and development of electronic devices with folding functions.

[0034] In order to solve the above technical problems, the present disclosure provides an antenna structure and an electronic device. The present disclosure is provided with a tuning branch that at least partially overlaps with an antenna body and a parasitic tuning branch connected to the tuning branch. When the electronic device is in a folded state, the tuning branch and the parasitic tuning branch resonate with the antenna body, thereby effectively improving the signal transmission performance of the antenna in the folded state of the electronic device and enhancing the user experience.

[0035] According to an exemplary embodiment, Figure 1-Figure 3 As shown. The embodiment of the present disclosure provides an antenna structure, which is applied to an electronic device with a folding function. For the convenience of explanation and understanding, the embodiment of the present disclosure takes a folding screen mobile phone as an example for detailed description. It can be understood that the technical solution provided by the embodiment of the present disclosure can also be applied to other electronic devices with a folding function such as laptops, and the embodiment of the present disclosure does not impose too many restrictions on this.

[0036] The electronic device includes a first side 11 and a second side 12 that can be relatively folded and unfolded. A first shell can be provided on the first side 11, and a second shell can be provided on the second side 12. The first shell and the second shell can be rotatably connected by a structure such as a rotating shaft, so as to realize the folding and unfolding of the electronic device. Among them, the first side 11 can be the base side (i.e., the basic side) of the electronic device. In the electronic device with a folding function, the structures such as chips, circuits, and antennas are mostly concentrated on the base side. The second side 12 can be the flip side (i.e., the folding side) of the electronic device. The base side and the flip side of the electronic device can be relatively rotated by a hinge, a rotating shaft, and other structures to be folded or unfolded.

[0037] The antenna structure includes an antenna body 20, a tuning branch 30 and a parasitic tuning branch, wherein the frequency band range of the antenna body 20 is 1.7GHz to 2.7GHz, which may include B3 (about 1.8GHz), B1 (about 2.1GHz), B40 (about 2.3GHz), B41 (about 2.5GHz) and WiFi2.4GHz frequency bands. The antenna body 20 can be provided with a switch with a selection function and different circuits electrically connected to the switch, so as to switch antenna signals of different frequency bands.

[0038] The antenna body 20 is arranged on the first side 11 of the electronic device, the tuning branch 30 and the parasitic tuning branch are arranged on the second side 12, and the antenna body 20, the tuning branch and the parasitic tuning branch can all be arranged on the housing of the electronic device, and finally connected to the middle frame 10 of the electronic device to achieve grounding. When the electronic device is in a folded state, the tuning branch 30 and the antenna body 20 are at least partially overlapped, that is, when the folding screen of the electronic device is in a folded state, the tuning branch 30 and the antenna body 20 are partially overlapped or completely corresponding, and the tuning branch 30 resonates with the antenna body 20 to enhance the antenna signal of the frequency band that the antenna body 20 wants to radiate the signal, thereby improving the radiation intensity and signal transmission efficiency of the antenna in the folded state of the electronic device, thereby improving the OTA (Over-the-Air Technology) performance of the electronic device and enhancing the user experience.

[0039] The parasitic tuning branch is arranged on the second side 12, and is electrically connected to the tuning branch 30 by at least one of a ground connection and a coupling connection. The tuning branch 30 and the parasitic tuning branch work together to enhance the radiation signal of the preset radiation frequency band of the antenna body 20.

[0040] In one example, the parasitic tuning branch is connected to the tuning branch 30 through a ground connection, and the parasitic tuning branch and the tuning branch 30 can both be grounded through the conductive middle frame 10. The parasitic tuning branch and the tuning branch 30 share a grounding position, which can enhance the effect of the parasitic waves generated by the parasitic tuning branch, thereby enhancing the antenna performance. Alternatively, the circuit is connected to the grounding point on the mainboard (not shown in the figure) of the electronic device, and the grounding point of the mainboard is connected to the grounding position of the middle frame 10, thereby achieving grounding, so as to facilitate the layout of the circuit routing.

[0041] In another example, the parasitic tuning branch is connected to the tuning branch 30 through a coupling connection, thereby increasing the coupling degree of the parasitic tuning branch and effectively improving the performance of the antenna in the folded state of the electronic device.

[0042] It is understandable that there may be multiple parasitic tuning branches, some of which are electrically connected to the tuning branch 30 through a ground connection, and some of which are electrically connected to the tuning branch 30 through a coupling connection, so as to avoid the limitation of the parasitic wave of a single parasitic tuning branch on the performance improvement of the antenna, and better improve the performance of the antenna. At the same time, the types of parasitic tuning branches may also be different, such as magnetic parasitic branches that generate radiation signals through the action of a magnetic field, or electrical parasitic branches that generate radiation signals through the action of an electrical signal.

[0043] In the embodiments of the present disclosure, a tuning branch that at least partially overlaps with the antenna body and a parasitic tuning branch connected to the tuning branch are provided. When the electronic device is in a folded state, the tuning branch and the parasitic tuning branch resonate with the antenna body, thereby effectively improving the signal transmission performance of the antenna in the folded state of the electronic device and enhancing the user experience.

[0044] In some embodiments, the parasitic tuning branch includes at least one of a magnetic parasitic branch 41 and an electric parasitic branch 42. The magnetic parasitic branch 41 is grounded to the tuning branch 30 through a grounding branch 43, and the electric parasitic branch 42 is coupled to the tuning branch 30. The length of the grounding branch 43 of the parasitic tuning branch is an eighth length L8, and the range of L8 is 6 mm to 8 mm, preferably 7 mm. When the electronic device is folded, the grounding branch 43 at least partially overlaps with the second branch 22 of the antenna body 20 on the first side 11, and the second branch 22 is used to achieve grounding of the antenna body 20.

[0045] In one example, the parasitic tuning stubs include only magnetic parasitic stubs. In another example, the parasitic tuning stubs include only electrical parasitic stubs. In yet another example, Figure 1 , Figure 2 As shown, the parasitic tuning branches include magnetic parasitic branches 41 and electric parasitic branches 42. The magnetic parasitic branches 41 are arranged at the top or bottom of the electronic device. The position of the magnetic parasitic branches 41 needs to be adjusted according to the setting position of the antenna body 20. If the antenna body 20 is arranged at the top, the magnetic parasitic branches 41 also need to be arranged at the top. If the antenna body 20 is arranged at the bottom, the magnetic parasitic branches 41 also need to be arranged at the bottom to form a parasitic relationship with the antenna body 20, thereby improving the radiation effect of the preset frequency band of the antenna body 20. The tuning branches 30 and the electric parasitic branches 42 are arranged on the side of the electronic device. Although they are arranged on the side, in the folded state, the tuning branches 30 also need to be arranged according to the setting position of the antenna body 20 to ensure the tuning effect.

[0046] The magnetic parasitic branch 41 and the tuning branch 30 are grounded through the grounding branch 43, which increases the coupling degree of the magnetic parasitic branch 41 and improves the antenna performance. The electric parasitic branch 42 is coupled to the tuning branch 30 to enhance the effect of parasitic waves, thereby effectively improving the antenna performance and signal transmission effect of the electronic device in the folded state.

[0047] In some embodiments, the magnetic parasitic branch 41 includes a first section 411 and a second section 412 connected to each other. The first section 411 extends along the width direction of the electronic device (i.e. Figure 2 The second section 412 extends along the length direction of the electronic device (i.e. Figure 2 The first section 411 is connected to the second section 412, and there is a preset angle between the first section 411 and the second section 412. The preset angle may be 75° to 105°, preferably 90°, that is, the first section 411 is perpendicular or approximately perpendicular to the second section 412.

[0048] In one example, the length of the first section 411 is a third length L3, which is in the range of 17 mm to 19 mm, preferably 18 mm. The length of the second section 412 is a fourth length L4, which is in the range of 7 mm to 9 mm, preferably 8 mm.

[0049] In one example, one end of the second section 412 away from the first section 411 is connected to the grounded branch 43, and one end of the first section 411 away from the second section 412 is provided with a second tuning switch 52. The second tuning switch 52 is also connected to a second tuning circuit (not shown in the figure) to tune the magnetic parasitic branch 41. The tuning method and effect of the second tuning circuit on the magnetic parasitic branch 41 are similar to those of the first tuning circuit on the electric parasitic branch 42, and the embodiments of the present disclosure are not described in detail here.

[0050] In some embodiments, the electric parasitic stub 42 is coupled to the tuning stub 30. Figure 2As shown, a break 44 is provided between the tuning branch 30 and the electric parasitic branch 42. The electric parasitic branch 42 includes a main body branch 421 and an extension branch 422 connected to the main body branch 421, the extension branch 422 is parallel to the main body branch 421, the extension branch 422 is staggered with the tuning branch 30, and the extension branch 422 extends between the tuning branch 30 and the middle frame 10 of the second side 12 of the electronic device. Since the break 44 is provided between the tuning branch 30 and the electric parasitic branch 42, the coupling strength cannot meet the requirements, so it is necessary to set the extension branch 422 to overlap with the tuning branch 30, so as to improve the coupling degree between the electric parasitic branch 42 and the tuning branch 30, form a parasitic wave to enhance the antenna signal, and then play a role in improving the antenna performance. Among them, the extended branch 422 and the main body branch 421 can be connected through the first connecting section 423. The first connecting section 423 and the main body branch 421 can be perpendicular to each other or have a certain angle, such as 45°~135°. The embodiments of the present disclosure do not impose too many restrictions on this, and technicians in this field can make settings according to actual needs.

[0051] In other embodiments, the tuning branch 30 is connected to the electric parasitic branch 42 via a capacitor circuit (not shown in the figure). The connection between the tuning branch 30 and the electric parasitic branch 42 via a capacitor circuit can enhance the coupling degree. In one example, the electric parasitic branch 42 may not be provided with an extended branch 422 extending between the tuning branch 30 and the middle frame 10 on the second side 12 of the electronic device, and is only connected to the tuning branch 30 via a capacitor circuit. In another example, the electric parasitic branch 42 is provided with an extended branch 422, and is also connected to the tuning branch 30 via a capacitor circuit to further improve the coupling degree and improve the antenna performance.

[0052] There are many ways to set the electric parasitic branch 42 with the extended branch 422. In one example, the electric parasitic branch 42 is set as a suspended branch, such as Figure 2 As shown, the overall length of the electric parasitic branch 42 is a first length L1, and the range of L1 is 76mm to 84mm, preferably 80mm. In another example, the end of the electric parasitic branch 42 away from the tuning branch 30 is grounded (not shown in the figure), and the distance between the grounding position of the electric parasitic branch 42 and the end of the electric parasitic branch 42 close to the tuning branch 30 is in the range of 43mm to 47mm, preferably 45mm. The technical solutions of the above two examples can both play a relatively good tuning role, so that the electric parasitic waves of the electric parasitic branch 42 play a role in improving the antenna performance.

[0053] In one example, the length of the extended branch 422 is a second length L2, and the range of L2 is 11 mm to 14 mm, preferably 11 mm. Figure 2As shown, the extended branch 422 extends between the tuning branch 30 and the middle frame 10 of the second side 12 of the electronic device, thereby improving the coupling effect between the extended branch 422 and the tuning branch 30. At the same time, the extended branch 422 and the tuning branch 30 are relatively close, which is also conducive to common board design, saving space inside the electronic device, improving space utilization, and facilitating the miniaturization and integration of the electronic device.

[0054] In one example, a first tuning switch 51 is provided at one end of the extended branch 422 away from the break 44. The first tuning switch 51 is also connected to a first tuning circuit (not shown in the figure), which may include at least one capacitor branch and at least one inductor branch. The first tuning switch 51 is a selection switch, and capacitors with different capacitance values ​​are provided on different capacitor branches, and inductors with different inductance values ​​are provided on different inductor branches. Thus, by switching the branch connected to the first tuning switch 51, different tuning effects on the electric parasitic branch 42 are achieved to better match the Figure 1 The frequency band of the antenna body 20.

[0055] For example, when the frequency band of the electric parasitic wave signal of the electric parasitic branch 42 is lower than the signal frequency band of the antenna body 20, or is located at the low frequency position of the signal frequency band of the antenna body 20, the first tuning switch 51 can be connected to the inductor branch, which is equivalent to increasing the frequency band of the electric parasitic wave signal of the electric parasitic branch 42; when the frequency band of the electric parasitic wave signal of the electric parasitic branch 42 is higher than the signal frequency band of the antenna body 20, or is located at the high frequency position of the signal frequency band of the antenna body 20, the first tuning switch 51 can be connected to the capacitor branch, which is equivalent to lowering the frequency band of the electric parasitic wave signal of the electric parasitic branch 42. It can be understood that a plurality of capacitor branches and a plurality of inductor branches can also be set in the first tuning circuit, and the branches connected to the first tuning switch 51 can be switched according to actual needs, so as to achieve the technical effect of being able to match the signal frequency band of the antenna body 20 in different usage environments.

[0056] In some embodiments, a third tuning switch 53 is provided at one end of the tuning branch 30 close to the ground branch 43. The third tuning switch 53 is connected to a third tuning circuit (not shown in the figure), and the third tuning circuit may include at least one capacitor branch and at least one inductor branch, wherein the third tuning switch 53 may be a selection switch, and capacitors with different capacitance values ​​are provided on different capacitor branches, and inductors with different inductance values ​​are provided on different inductor branches, so that different tuning effects on the tuning branch 30 are achieved by switching the branch connected by the third tuning switch 53, so as to better match Figure 1 The frequency band of the antenna body 20. The tuning method and function of the third tuning circuit on the tuning branch 30 are similar to those of the first tuning circuit on the electric parasitic branch 42, and the embodiments of the present disclosure are not described in detail here.

[0057] In one example, the distance between the third tuning switch 53 and the ground branch 43 is greater than or equal to 6 mm. Figure 2 As shown, the distance between the third tuning switch 53 and the end of the grounding branch 43 close to the tuning branch 30 is the fifth length L5. When the length of L5 is less than 6 mm, the parasitic waves generated will affect the radiation efficiency of the antenna. Therefore, L3 is set to be greater than or equal to 6 mm to better improve the antenna performance.

[0058] In an example, the distance between the third tuning switch 53 and the end of the extension branch 422 close to the tuning branch 30 is a sixth length L6, and the range of L6 is 14 mm to 17 mm, preferably 15.7 mm.

[0059] In some embodiments, the antenna body 20 includes an IFA (Inverted-F Antenna) antenna, which is a modified structure of a monopole antenna and has the advantages of small size, simple structure, easy matching, and low manufacturing cost. It is widely used in short-range wireless communication fields such as Bluetooth and WiFi. Figure 3 As shown, the antenna body 20 includes a first branch 21, a second branch 22 and a third branch 23, the first branch 21 and the third branch 23 are connected through the second branch 22, the second branch 22 is grounded, and the second branch 22 is connected to the middle frame 10. The first branch 21 includes a third section 211 and a fourth section 212 connected to each other, the third section 211 and the fourth section 212 are perpendicular or approximately perpendicular to each other, and the first branch 21, the second branch 22 and the third branch 23 form an "F" shape.

[0060] Among them, when the electronic device is in a folded state, the position of the first branch 21 corresponds to the magnetic parasitic branch 41, and the shape of the first branch 21 is substantially the same as the magnetic parasitic branch 41; the position of the third branch 23 corresponds to the tuning branch 30, and the shape of the third branch 23 is substantially the same as the tuning branch 30.

[0061] In an example, the length of the third branch 23 is a seventh length L7, and the range of L7 is 17 mm to 19 mm, preferably 18 mm.

[0062] The technical effects produced by the technical solution of the present disclosure can be referred to Figure 4 As shown, curve s represents the efficiency of the antenna, the horizontal axis is the frequency in MHz, and the vertical axis is the efficiency value of the antenna in dB. Figure 4 Point C in the figure represents the parasitic wave generated by the electric parasitic branch, and point D represents the fusion of the parasitic wave of the second branch of the antenna body and the parasitic wave of the magnetic parasitic branch. Figure 4It can be clearly seen that in the closed interval between point C and point D, the peak value of curve s is -6dB to -7dB, that is, after adopting the technical solution of the embodiment of the present disclosure, the efficiency of the antenna structure of the electronic device in the folded state can reach -6dB to -7dB. The vicinity of point C and point D is also the common working frequency band of the antenna, that is, around 1.7GHz and 2.1GHz, at this time the efficiency of the antenna can also reach -10dB to -12dB. Compared with the prior art, the overall efficiency of the antenna disclosed in the present disclosure is improved by about 1.5dB to 2dB, which effectively improves the signal transmission efficiency of the antenna in the folded state of the electronic device.

[0063] According to an exemplary embodiment, still referring to Figure 1-Figure 3 As shown, an embodiment of the present disclosure provides an electronic device, including a folding screen mobile phone, a laptop computer and other electronic devices with a folding function. The electronic device includes a first shell and a second shell (not shown in the figure) that can be folded and unfolded relative to each other, and the antenna structure as described in the above embodiment.

[0064] The electronic device includes a first side 11 and a second side 12 that can be folded and unfolded relative to each other, wherein the first side 11 can be the base side (i.e., the basic side) of the electronic device. In an electronic device with a folding function, structures such as chips, circuits, and antennas are mostly concentrated on the base side, and the second side 12 can be the flip side (i.e., the folding side) of the electronic device. The base side and the flip side of the electronic device can be relatively rotated through structures such as hinges and shafts to be folded or unfolded.

[0065] The antenna structure includes an antenna body 20, a tuning branch 30, and a parasitic tuning branch, wherein the antenna body 20 is arranged on the first side 11 of the electronic device, the tuning branch 30 and the parasitic tuning branch are arranged on the second side 12, a first shell can be arranged on the first side 11, and a second shell can be arranged on the second side 12, and the first shell and the second shell can be rotatably connected by a structure such as a rotating shaft, so as to realize the folding and unfolding of the electronic device. When the electronic device is in a folded state, the tuning branch 30 is arranged to at least partially overlap with the antenna body 20. The parasitic tuning branch is arranged on the second side 12, and the parasitic tuning branch is electrically connected to the tuning branch 30 by at least one connection method of ground connection and coupling connection.

[0066] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the embodiments disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0067] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna structure, characterized in that: Applicable to an electronic device with a folding function, the electronic device comprises a first side and a second side that can be relatively folded and unfolded, and the antenna structure comprises: An antenna body, disposed on the first side; a tuning branch, arranged on the second side, wherein the electronic device is in a folded state, the tuning branch and the antenna body are at least partially overlapped; A parasitic tuning branch is arranged on the second side, and the parasitic tuning branch is electrically connected to the tuning branch through at least one connection mode of ground connection and coupling connection.

2. The antenna structure according to claim 1, characterized in that: The parasitic tuning branches include at least one of magnetic parasitic branches and electric parasitic branches; The magnetic parasitic branch and the tuning branch are grounded via a grounding branch, and the electrical parasitic branch is coupled to the tuning branch.

3. The antenna structure according to claim 2, characterized in that: The parasitic tuning branches include the magnetic parasitic branches and the electric parasitic branches; The magnetic parasitic branch is arranged on the top or the bottom of the electronic device, and the tuning branch and the electric parasitic branch are arranged on the side of the electronic device.

4. The antenna structure according to claim 3, characterized in that: A gap is provided between the tuning branch and the electric parasitic branch, the electric parasitic branch comprises a main body branch and an extension branch connected to the main body branch, the extension branch is parallel to the main body branch, and the extension branch is staggered with the tuning branch; The extended branch extends between the tuning branch and the middle frame of the second side of the electronic device.

5. The antenna structure according to claim 4, characterized in that: The electric parasitic branches are configured as suspended branches; Alternatively, one end of the electric parasitic branch away from the tuning branch is grounded.

6. The antenna structure according to claim 4, characterized in that: The length of the extended branch is 11 mm to 14 mm.

7. The antenna structure according to claim 4, characterized in that: A first tuning switch is arranged at one end of the extended branch away from the break.

8. The antenna structure according to claim 3, characterized in that: The magnetic parasitic branch includes a first section extending along the width direction of the electronic device, and a second section extending along the length direction of the electronic device, the first section is connected to the second section, and there is a preset angle between the first section and the second section; One end of the second segment away from the first segment is connected to the ground branch, and one end of the first segment away from the second segment is provided with a second tuning switch.

9. The antenna structure according to claim 3, characterized in that: The tuning branch and the electric parasitic branch are connected via a capacitive circuit.

10. The antenna structure according to claim 2, characterized in that: A third tuning switch is provided at one end of the tuning branch close to the grounding branch, and the distance between the third tuning switch and the grounding branch is greater than or equal to 6 mm.

11. The antenna structure according to any one of claims 1 to 10, characterized in that: The antenna body includes an IFA antenna.

12. An electronic device, characterized in that: The invention comprises a first shell and a second shell which can be folded and unfolded relative to each other, and the antenna structure according to any one of claims 1 to 11.

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