Electronic device and antenna structure

Abstract

An electronic device and an antenna structure are provided. The electronic device comprises a shell and an antenna structure. The antenna structure comprises a first radiation part, a second radiation part, a grounding part, a feed-in part, a switching circuit and a proximity sensing circuit, the first radiation part comprises a first radiation part, a feed-in part and a grounding part; the feed-in part and the grounding part are connected to the first radiation part; the second radiation part comprises a first branch, a second branch, a third branch, a fourth branch and a fifth branch; the first branch and the second branch intersect at a first branch point, and the third branch and the fourth branch intersect at a second branch point; one end of the fifth branch is connected to the first branch point, and the other end of the fifth branch is connected to the second branch point; the first radiation part extends between the first branch circuit and the second branch circuit, so that the first radiation part and the second radiation part are mutually coupled. According to the electronic device and the antenna structure, a transmission line and a matching element do not need to be lapped to the first radiation part, so that the bandwidth, the frequency offset and the antenna efficiency of the antenna structure are improved.

Description

Technical Field

[0001] The present invention relates to an electronic device and an antenna structure, and in particular to an antenna structure and an electronic device having an operating frequency band applied by the fifth generation mobile communication technology. Background Art

[0002] Existing electronic products, such as notebook computers and tablet computers, have a tendency to be thinner and lighter in appearance. However, with the development of the fifth generation mobile network (5G), the space available for accommodating antennas in existing electronic products is insufficient, resulting in the problem of insufficient bandwidth in the designed antenna structure.

[0003] Therefore, how to overcome the above-mentioned defects by improving the antenna structure design has become one of the important issues to be solved in this field.

[0004] Therefore, it is necessary to provide an electronic device and an antenna structure to solve the above problems. Summary of the invention

[0005] The present invention mainly provides an electronic device and an antenna structure to solve the technical problem that the space for accommodating the antenna in the existing electronic products is insufficient, resulting in the antenna structure having insufficient bandwidth.

[0006] In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide an electronic device, which includes a housing and an antenna structure. The antenna structure is arranged in the housing. The antenna structure includes a first radiating element, a second radiating element, a grounding element, a feeding element, a switching circuit and a proximity sensing circuit. The first radiating element includes a first radiating portion, a feeding portion and a grounding portion. The feeding portion and the grounding portion are connected to the first radiating portion. The second radiating element includes a first branch, a second branch, a third branch, a fourth branch and a fifth branch. The first branch and the second branch extend along a first direction, and the third branch and the fourth branch extend along a second direction, and the first direction is different from the second direction. The first branch and the second branch intersect at a first branch point, and the third branch and the fourth branch intersect at a second branch point. One end of the fifth branch is connected to the first branch point, and the other end of the fifth branch is connected to the second branch point. The first radiating portion extends between the first branch and the second branch, so that the first radiating portion and the second radiating element are coupled to each other. The grounding element is connected to the grounding portion. The feed-in component has a signal terminal and a ground terminal, the signal terminal is connected to the feed-in portion, and the ground terminal is connected to the ground component. The switching circuit is electrically connected to the third branch. The proximity sensing circuit is electrically connected to the fourth branch.

[0007] In order to solve the above technical problems, another technical solution adopted by the present invention is to provide an antenna structure, which includes a first radiating element, a second radiating element, a grounding element, a feeding element, a switching circuit and a proximity sensing circuit. The first radiating element includes a first radiating portion, a feeding portion and a grounding portion. The feeding portion and the grounding portion are connected to the first radiating portion. The second radiating element includes a first branch, a second branch, a third branch, a fourth branch and a fifth branch. The first branch and the second branch extend along a first direction, and the third branch and the fourth branch extend along a second direction, and the first direction is different from the second direction. The first branch and the second branch intersect at a first branch point, and the third branch and the fourth branch intersect at a second branch point. One end of the fifth branch is connected to the first branch point, and the other end of the fifth branch is connected to the second branch point. The first radiating portion extends between the first branch and the second branch, so that the first radiating portion and the second radiating element are coupled to each other. The grounding element is connected to the grounding portion. The feeding element has a signal end and a grounding end, the signal end is connected to the feeding portion, and the grounding end is connected to the grounding element. The switching circuit is electrically connected to the third branch. The proximity sensing circuit is electrically connected to the fourth branch.

[0008] One of the beneficial effects of the present invention is that the electronic device and antenna structure provided by the present invention can form a bidirectional fork-shaped structure for the second radiator through the technical solutions of "the first branch of the second radiator intersects with the second branch at the first branch point, and the third branch of the second radiator intersects with the fourth branch at the second branch point", "the first radiator extends between the first branch and the second branch, so that the first radiator and the second radiator are mutually coupled", and "the switching circuit is electrically connected to the third branch, and the proximity sensing circuit is electrically connected to the fourth branch". Thereby, the antenna structure can be optimized to be connected to the first radiator without the use of transmission lines and matching elements, so as to improve the bandwidth, frequency deviation and antenna efficiency of the antenna structure.

[0009] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of an electronic device of the present invention.

[0011] Figure 2 It is a three-dimensional schematic diagram of the antenna structure of the present invention.

[0012] Figure 3 Schematic diagram of the antenna structure of the present invention.

[0013] Figure 4 It is a schematic diagram of the first radiating portion, the second radiating element, the switching circuit and the proximity sensing circuit of the antenna structure of the present invention.

[0014] Figure 5 It is a schematic diagram of the reflection loss curve of the antenna structure of the present invention.

[0015] Main component symbols:

[0016] D Electronic Devices

[0017] T housing

[0018] M Antenna Structure

[0019] S substrate

[0020] S1 First Surface

[0021] S2 Second Surface

[0022] S3 Third Surface

[0023] 1 First radiator

[0024] 11. First radiating section

[0025] 12 Feeding section

[0026] 121 Arm

[0027] 13 Grounding

[0028] 14 Second Radiant

[0029] 141 First End

[0030] 142 Second End

[0031] 15 The third radiation

[0032] 151 First End

[0033] 152 Second End

[0034] 2 Second radiator

[0035] 21 First Branch Road

[0036] 211 First Arm

[0037] 212 Second arm

[0038] 22 Second Branch Road

[0039] 23 Third Branch Road

[0040] 24 Fourth Branch Road

[0041] 25 Fifth Branch Road

[0042] 3 Grounding piece

[0043] 4 Feedthrough

[0044] 41 signal terminal

[0045] 42 Ground terminal

[0046] 5 Switching Circuit

[0047] 6 Proximity sensing circuit

[0048] P1 First branch point

[0049] P2 Second branch point

[0050] G Metal Parts

[0051] R Control circuit

[0052] L Inductor

[0053] C Integration Module

[0054] H1, H2 length

[0055] F1, F2 pins

[0056] W signaling pathway

[0057] W1 First Path

[0058] W2 Second Path

[0059] W3 Third Path

[0060] SW1 First switch

[0061] SW2 Second switch

[0062] SW3 The third switch

[0063] E1 First Passive Component

[0064] E2 Second passive component

[0065] E3 Third Passive Component

[0066] CL1, CL2 coupling length

[0067] CG1 First coupling distance

[0068] CG2 Second coupling distance

[0069] CG3 Third coupling distance

[0070] 111 First Section

[0071] 112 Second Section DETAILED DESCRIPTION

[0072] The following is a specific embodiment to illustrate the implementation of the "electronic device and antenna structure" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations, not depictions based on actual dimensions, and it is stated in advance. The following implementations will further explain the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention. In addition, it should be understood that although the terms "first", "second", "third" and the like may be used in this article to describe various elements, these elements should not be limited by these terms. These terms are mainly used to distinguish one element from another. In addition, the term "or" used in this article should include any one or more combinations of the associated listed items depending on the actual situation. In addition, the term “connect” in the present invention means that there is a physical connection between two elements and it can be a direct connection or an indirect connection, and the term “couple” in the present invention means that two elements are separated from each other and have no physical connection, but the electric field energy generated by the current of one element excites the electric field energy of another element.

[0073] [Example]

[0074] See also Figure 1 As shown, Figure 1 Schematic diagram of the electronic device of the present invention. The present invention provides an electronic device D, which includes a housing T and an antenna structure M disposed in the housing T. The electronic device D may be a smart phone, a tablet computer, or a notebook computer, but the present invention is not limited thereto. The present invention takes the electronic device D as an example of a notebook computer. At least a portion of the housing T may be a metal housing. The electronic device D can generate at least one operating frequency band through the antenna structure M. In addition, the present invention is not limited to the number and position of the antenna structure M in the electronic device D.

[0075] See also Figure 2 and Figure 3 As shown, Figure 2 is a three-dimensional schematic diagram of the antenna structure of the present invention, Figure 3Schematic diagram of the antenna structure of the present invention. The antenna structure M includes a first radiating element 1, a second radiating element 2, a grounding element 3, a feeding element 4, a switching circuit 5 and a proximity sensing circuit 6. The antenna structure M also includes a substrate S. For example, the substrate S can be a FR4 substrate, a printed circuit board or a flexible printed circuit board, the first radiating element 1, the second radiating element 2 and the grounding element 3 can be metal sheets, metal wires or other conductive bodies with conductive effects, and the feeding element 4 can be a coaxial cable (Coaxial cable), but the present invention is not limited thereto.

[0076] It is worth mentioning that Figure 2 is the three-dimensional form of the antenna structure M, Figure 3 is the planar shape of the antenna structure M. In order to clearly present the shapes of the first radiating element 1 and the second radiating element 2, Figure 2 The feed-in element 4 is omitted. Figure 2 As shown, the substrate S has a first surface S1 and a second surface S2, and a third surface S3 connected between the first surface S1 and the second surface S2. The first surface S1 and the second surface S2 are respectively located on opposite sides of the substrate S. The first radiation element 1 includes a first radiation portion 11, a feeding portion 12 and a grounding portion 13. The feeding portion 12 and the grounding portion 13 are connected to the first radiation portion 11. The first radiation portion 11, the feeding portion 12 and the grounding portion 13 are arranged on the first surface S1. In addition, in an embodiment of the present invention, a portion of the second radiation element 2 is arranged on the first surface S1, and another portion of the second radiation element 2 is arranged on the third surface S3.

[0077] The grounding element 3 is connected to the grounding portion 13. The grounding element 3 can be electrically connected to a metal element G, which can be a part of the housing T of the electronic device D, but the present invention is not limited thereto. The feeding element 4 has a signal terminal 41 and a grounding terminal 42. The signal terminal 41 is connected to the feeding portion 14, and the grounding terminal 42 is connected to the grounding element 3. Thus, the first radiating element 1 forms an inverted F-type planar antenna (PIFA) structure.

[0078] like Figure 3 As shown, the second radiating element 2 includes a first branch 21, a second branch 22, a third branch 23, a fourth branch 24 and a fifth branch 25. The first branch 21 and the second branch 22 extend along a first direction (negative X-axis direction). The third branch 23 and the fourth branch 24 extend along a second direction (positive Y-axis direction). The first direction is different from the second direction. Further, the first branch 21 and the second branch 22 intersect at a first branch point P1, and the third branch 23 and the fourth branch 24 intersect at a second branch point P2. One end of the fifth branch 25 is connected to the first branch point P1, and the other end of the fifth branch 25 is connected to the second branch point P2. Thereby, the second radiating element 2 forms a bidirectional fork-shaped structure.

[0079] The switching circuit 5 is electrically connected to the third branch 23, and the proximity sensing circuit 6 is electrically connected to the fourth branch 24. The first radiating portion 11 extends between the first branch 21 and the second branch 22, so that the first radiating portion 11 and the second radiating element 2 are coupled to each other, and at least one operating frequency band is generated in conjunction with the switching circuit 5. In addition, the present invention adopts a structural design in which the first branch 21 and the second branch 22 extend in the same direction, so that when the first radiating portion 11 and the second radiating element 2 are coupled to each other, the first branch 21 and the second branch 22 can be excited to generate a current path in the same direction, thereby increasing the matching effect of the first radiating portion 11 and the second radiating element 2.

[0080] See also Figure 3 and Figure 4 As shown, Figure 4 FIG. 1 is a schematic diagram of the first radiating portion, the second radiating element, the switching circuit and the proximity sensing circuit of the antenna structure of the present invention. Figure 4 As shown, the length H1 of the first branch 21 is not equal to the length H2 of the second branch 22. The length H1 of the first branch 21 is the extension distance from the first branch point P1 to the open end of the first branch arm 211, and the length H2 of the second branch 22 is the extension distance from the first branch point P1 to the open end of the second branch 22. The first radiating portion 11 and the first branch 21 are separated from each other and coupled to each other to generate a first operating frequency band with a frequency range in LTE Band 5. The first radiating portion 11 and the second branch 22 are separated from each other and coupled to each other to generate a second operating frequency band with a frequency range in LTE Band 71. The first operating frequency band is higher than the second operating frequency band. Further, as Figure 4 As shown, the coupling length CL1 between the first radiating portion 11 and the first branch 21 is equal to 1 / 4 wavelength of the center frequency of the first operating frequency band. The coupling length CL2 between the first radiating portion 11 and the second branch 22 is equal to 1 / 4 wavelength of the center frequency of the second operating frequency band. It should be noted that the "coupling length" referred to here does not refer to the length of the element, but refers to the effective length of a part of the antenna element used to produce the coupling effect.

[0081] like Figure 3 As shown, the first radiation part 11 includes a first section 111 and a second section 112, the feeding part 12 is connected between the first section 111 and the second section 112, the grounding part 13 is connected to the first section 111, and the first section 111 extends between the first branch 21 and the second branch 22. The first radiation element 1 is fed with a signal through the feeding part 12, so that the first section 111 and the feeding part 12 are excited to generate a third operating frequency band with a frequency range of 1500MHz to 3000MHz.

[0082] like Figure 3 and Figure 4As shown, the first branch 21 includes a first arm 211 and a second arm 212. One end of the second arm 212 is connected to the first arm 211, and the other end of the second arm 212 is connected to the first branch point P1. In this embodiment, the first branch 21 is L-shaped (i.e. Figure 3 Since the first branch 21 is L-shaped, there is a first coupling distance CG1 between the first arm 211 and the first radiating portion 11, and there is a second coupling distance CG2 between the second arm 212 and the first radiating portion 11. The second coupling distance CG2 is greater than the first coupling distance CG1.

[0083] Furthermore, there is a third coupling distance CG3 between the second branch 22 and the first radiating portion 11, and the third coupling distance CG3 is smaller than the first coupling distance CG1 and the second coupling distance CG2. Preferably, the first coupling distance CG1 is 1.5 mm, the second coupling distance CG2 is greater than 5 mm, and the third coupling distance CG3 is 0.2 mm.

[0084] like Figure 2 and Figure 3 As shown, the first radiation element 1 further includes a second radiation portion 14 and a third radiation portion 15. The second radiation portion 14 and the third radiation portion 15 are disposed on the second surface S2. The first end 141 of the second radiation portion 14 and the first end 151 of the third radiation portion 15 are connected to the first radiation portion 11, while the second end 142 of the second radiation portion 14 and the second end 152 of the third radiation portion 15 are extended from the third surface S3 to the second surface S2. However, the above example is only one feasible embodiment and is not intended to limit the present invention. Specifically, the second radiation portion 14 is connected to the second section 112, and the third radiation portion 15 is connected to the first section 111. The projection area of ​​the second radiation portion 14 vertically projected on the first surface S1 of the substrate S partially overlaps with the feeding portion 12, and the projection area of ​​the third radiation portion 15 vertically projected on the first surface S1 of the substrate S partially overlaps with the grounding portion 13.

[0085] The feeding portion 12 has an arm 121. The second radiating portion 14 is coupled with the arm 121 to generate a fourth operating frequency band with a frequency range between 4200 MHz and 5000 MHz. The third radiating portion 15 is coupled with the ground portion 13 to generate a fifth operating frequency band with a frequency range between 5000 MHz and 6000 MHz. The fifth operating frequency band is higher than the fourth operating frequency band.

[0086] It is worth mentioning that, since the feeding portion 12 and the grounding portion 13 are disposed on the first surface S1 of the substrate S, and the second radiating portion 14 and the third radiating portion 15 are disposed on the second surface S2 of the substrate S, the coupling amount between the second radiating portion 14 and the arm 121 and the coupling amount between the third radiating portion 15 and the grounding portion 13 are related to the thickness of the substrate S (i.e., the distance between the first surface S1 and the second surface S2). In the present invention, the thickness range of the substrate S is less than 3 mm, preferably 1.5 mm.

[0087] like Figure 3 and Figure 4 As shown, the switching circuit 5 is a part of the multifunctional integrated module C, and the second radiating element 2 can be electrically connected to one of the pins F1 in the integrated module C through the third branch 23, and then electrically connected to the switching circuit 5 through the pin F1. In addition, the second radiating element 2 can be electrically connected to another pin F2 in the integrated module C through the fourth branch 24, and then electrically connected to the proximity sensing circuit 6 through the pin F2. The antenna structure also includes an inductor element L, and the inductor element L is connected between the fourth branch 24 and the proximity sensing circuit 6. It should be noted that in this embodiment, the inductor element L is located outside the integrated module C, but the present invention is not limited to this. In other embodiments, the inductor element L can also be integrated into the integrated module C. Preferably, the inductance value of the inductor element L is 33nH.

[0088] like Figure 4 As shown, the switching circuit 5 includes a signal conduction path W and at least one transmission path. The signal conduction path W is electrically connected to the third branch 23. At least one transmission path is electrically connected to the signal conduction path W, and at least one transmission path is respectively connected in series with at least one passive element. The present invention is not limited to the number of transmission paths. For example, the switching circuit 5 may include three transmission paths, namely a first path W1, a second path W2, and a third path W3, and the first path W1, the second path W2, and the third path W3 are electrically connected to the signal conduction path W.

[0089] The first path W1 is connected in series with the first passive element E1 and the first switch SW1, the second path W2 is connected in series with the second passive element E2 and the second switch SW2, and the third path W3 is connected in series with the third passive element E3 and the third switch SW3. In addition, in the present invention, the first passive element E1, the second passive element E2 and the third passive element E3 can be inductors, capacitors or resistors, and the present invention is not limited thereto. For example, the first passive element E1, the second passive element E2 and the third passive element E3 are all capacitors, and the capacitance values ​​of the three are 47pF, 56pF and 68pF respectively. Therefore, the electronic device D can adjust the operating frequency band, impedance matching and radiation efficiency of the antenna structure M by using the settings of the first passive element E1, the second passive element E2 and the third passive element E3.

[0090] The electronic device D may further include a control circuit R. The control circuit R may control the switching circuit 5 to switch to one of a plurality of modes to adjust the operating frequency band of the antenna structure M so that the antenna structure M can cover a wider frequency range at a low frequency. For example, the control circuit R may control the switching circuit 5 to switch to a first mode, a second mode, a third mode, and a fourth mode. In the first mode, the second radiating element 2 is electrically connected to the control circuit R, and the first to third switching switches SW1 to SW3 respectively located on the first to third paths W1 to W3 are in a non-conducting state. In the second mode, the second radiating element 2 is grounded through the first path W1, and the first switching switch SW1 located on the first path W1 is in a conducting state, while the second switching switch SW2 and the third switching switch SW3 respectively located on the second path W2 and the third path W3 are in a non-conducting state. In the third mode, the second radiating element 2 is grounded through the second path W2, and the second switching switch SW2 located on the second path W2 is in a conducting state, while the first switching switch SW1 and the third switching switch SW3 respectively located on the first path W1 and the third path W3 are in a non-conducting state. In the fourth mode, the second radiation element 2 is grounded through the third path W3 , and the third switch SW3 on the third path W3 is in the conducting state, while the first switch SW1 and the second switch SW2 on the first path W1 and the second path W2 are in the non-conducting state.

[0091] See also Figure 5 As shown, Figure 5 It is a schematic diagram of the reflection loss curve of the antenna structure of the present invention. Frequency range 1 (Range1) and frequency range 3 (Range 3) are the bandwidths of the antenna structure M of the present invention using the second radiating element 2 with a bidirectional fork-type structure in the low-frequency range, and frequency range 2 (Range 2) and frequency range 4 (Range 4) are the bandwidths of the antenna structure of the prior art in the low-frequency range. Further, frequency range 1 (Range 1) and frequency range 2 (Range 2) are within the range of the second operating frequency band (LTE Band 71), and frequency range 3 (Range 3) and frequency range 4 (Range 4) are within the range of the first operating frequency band (LTE Band 5).

[0092] Depend on Figure 5It can be seen that the bandwidth of the antenna structure in the prior art is about 55MHz (625MHz to 680MHz) in LTE Band 71, and about 75MHz (720MHz to 795MHz) in LTE Band 5. In comparison, when the second radiating element 2 of the antenna structure M of the present invention is changed to a bidirectional fork-type structure, the bandwidth in LTE Band 71 is about 70MHz (620MHz to 690MHz), and the bandwidth in LTE Band 5 is about 95MHz (730MHz to 825MHz). Therefore, when the second radiating element 2 of the antenna structure M of the present invention is changed to a bidirectional fork-type structure, the operating band generated in the low-frequency range has obviously better bandwidth. Compared with the existing antenna structure, the antenna structure M of the present invention has a 25% increase in bandwidth in LTE Band 71 and a 25% increase in bandwidth in LTE Band 5. In addition, compared with the existing antenna structure, the antenna structure M of the present invention can increase the frequency deviation by an additional 20MHz.

[0093] In addition, the present invention electrically connects the proximity sensing circuit 6 to the fourth branch 24 of the second radiating element 2, so as to regard the second radiating element 2 as a sensing electrode (Sensor pad), so as to allow the proximity sensing circuit 6 to measure the distance between an object (e.g., a body part of a user) and the antenna structure M. Thus, the electronic device D can have a function for sensing whether a human body is close to the antenna structure M, and can further adjust the radiation power of the antenna structure T to avoid the problem of excessively high specific absorption rate (SAR) of electromagnetic wave energy per unit mass of the biological body.

[0094] Furthermore, in the present invention, since there is no electrical connection between the proximity sensing circuit 6 and the first radiating element 1 through any line, the first radiating element 1 used as a PIFA antenna can coexist with the second radiating element 2 used as a sensing electrode in conjunction with the proximity sensing circuit 6, thereby improving the antenna efficiency.

[0095] [Beneficial Effects of Embodiments]

[0096] One of the beneficial effects of the present invention is that the electronic device D and antenna structure M provided by the present invention can form a bidirectional fork-shaped structure for the second radiating element 2 through the technical solutions of "the first branch 21 and the second branch 22 of the second radiating element 2 intersect at the first branch point P1, and the third branch 23 and the fourth branch 24 of the second radiating element 2 intersect at the second branch point", "the first radiating portion 11 extends between the first branch 21 and the second branch 22, so that the first radiating portion 11 and the second radiating element 2 are coupled to each other", and "the switching circuit 5 is electrically connected to the third branch 23, and the proximity sensing circuit 6 is electrically connected to the fourth branch 24". Thereby, the antenna structure M can be optimized to be connected to the first radiating element 1 without the use of transmission lines and matching elements, so as to improve the bandwidth, frequency deviation and antenna efficiency of the antenna structure M.

[0097] Furthermore, when the second radiating element 2 of the antenna structure M of the present invention is changed to a bidirectional fork-shaped structure, the operating band generated in the low frequency range has a significantly better bandwidth. Compared with the existing antenna structure, the bandwidth of the antenna structure M of the present invention is increased by 25% in LTE Band 71 and 25% in LTE Band 5. In addition, compared with the existing antenna structure, the antenna structure M of the present invention can increase the frequency deviation by an additional 20MHz.

[0098] Furthermore, in the present invention, since there is no electrical connection between the proximity sensing circuit 6 and the first radiating element 1 through any line, the first radiating element 1 used as a PIFA antenna can coexist with the second radiating element 2 used as a sensing electrode in conjunction with the proximity sensing circuit 6, thereby improving the antenna efficiency.

[0099] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the claims of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the scope of the claims of the present invention.

Claims

1. An electronic device, comprising: a housing; as well as An antenna structure is arranged in the housing, and includes: A first radiation element, the first radiation element comprising a first radiation portion, a feeding portion and a grounding portion, the feeding portion and the grounding portion being connected to the first radiation portion; A second radiating element, the second radiating element comprising a first branch, a second branch, a third branch, a fourth branch and a fifth branch, the first branch and the second branch extending along a first direction, the third branch and the fourth branch extending along a second direction, the first direction being different from the second direction, the first branch and the second branch intersecting at a first branch point, the third branch and the fourth branch intersecting at a second branch point, one end of the fifth branch connected to the first branch point, the other end of the fifth branch connected to the second branch point, the first radiating portion extending between the first branch and the second branch, so that the first radiating portion and the second radiating element are coupled to each other; a grounding member connected to the grounding portion; A feeding element, the feeding element having a signal end and a ground end, the signal end is connected to the feeding portion, and the ground end is connected to the ground element; a switching circuit electrically connected to the third branch; and A proximity sensing circuit is electrically connected to the fourth branch.

2. The electronic device according to claim 1, wherein: The length of the first branch is not equal to the length of the second branch.

3. The electronic device as claimed in claim 2, wherein: The first radiating portion and the first branch are separated from each other and coupled to each other to generate a first operating frequency band; the first radiating portion and the second branch are separated from each other and coupled to each other to generate a second operating frequency band, and the first operating frequency band is higher than the second operating frequency band; wherein the coupling length between the first radiating portion and the first branch is equal to 1 / 4 wavelength of a center frequency of the first operating frequency band, and the coupling length between the first radiating portion and the second branch is equal to 1 / 4 wavelength of a center frequency of the second operating frequency band.

4. The electronic device as claimed in claim 3, wherein: The first branch includes a first arm and a second arm, one end of the second arm is connected to the first arm, and the other end of the second arm is connected to the first branch point. There is a first coupling distance between the first arm and the first radiating portion, and there is a second coupling distance between the second arm and the first radiating portion, and the second coupling distance is greater than the first coupling distance.

5. The electronic device as claimed in claim 4, wherein: A third coupling distance is provided between the second branch and the first radiating portion, and the third coupling distance is smaller than the first coupling distance and the second coupling distance.

6. The electronic device as claimed in claim 1, wherein: The antenna structure also includes a substrate having a first surface and a second surface. The first surface and the second surface are respectively located on opposite sides of the substrate. The first radiation part, the feeding part, the grounding part and the second radiation part are arranged on the first surface.

7. The electronic device as claimed in claim 6, wherein: The first radiation element further includes a second radiation portion, which is disposed on the second surface and connected to the first radiation portion. The projection area of ​​the second radiation portion vertically projected on the first surface partially overlaps with the feeding portion.

8. The electronic device as claimed in claim 7, wherein: The first radiation element further includes a third radiation portion, which is disposed on the second surface and connected to the first radiation portion. The projection area of ​​the third radiation portion vertically projected on the first surface partially overlaps with the ground portion.

9. The electronic device as claimed in claim 1, wherein: The antenna structure also includes an inductor element, which is connected between the fourth branch and the proximity sensing circuit; the switching circuit includes a signal conduction path and at least one transmission path, the signal conduction path is electrically connected to the third branch, the at least one transmission path is electrically connected to the signal conduction path, and the at least one transmission path is respectively connected in series with at least one passive element.

10. An antenna structure, comprising: A first radiation element, the first radiation element comprising a first radiation portion, a feeding portion and a grounding portion, the feeding portion and the grounding portion being connected to the first radiation portion; A second radiating element, the second radiating element comprising a first branch, a second branch, a third branch, a fourth branch and a fifth branch, the first branch and the second branch extending along a first direction, the third branch and the fourth branch extending along a second direction, the first direction being different from the second direction, the first branch and the second branch intersecting at a first branch point, the third branch and the fourth branch intersecting at a second branch point, one end of the fifth branch connected to the first branch point, the other end of the fifth branch connected to the second branch point, the first radiating portion extending between the first branch and the second branch, so that the first radiating portion and the second radiating element are coupled to each other; a grounding member connected to the grounding portion; A feeding element, the feeding element having a signal end and a ground end, the signal end is connected to the feeding portion, and the ground end is connected to the ground element; a switching circuit electrically connected to the third branch; as well as A proximity sensing circuit is electrically connected to the fourth branch.

11. The antenna structure according to claim 10, wherein: The length of the first branch is not equal to the length of the second branch.

12. The antenna structure according to claim 11, wherein: The first radiating portion and the first branch are separated from each other and coupled to each other to generate a first operating frequency band; The first radiating portion and the second branch are separated from each other and coupled to each other to generate a second operating frequency band, and the first operating frequency band is higher than the second operating frequency band; wherein the coupling length between the first radiating portion and the first branch is equal to 1 / 4 wavelength of a center frequency of the first operating frequency band, and the coupling length between the first radiating portion and the second branch is equal to 1 / 4 wavelength of a center frequency of the second operating frequency band.

13. The antenna structure according to claim 12, wherein: The first branch includes a first arm and a second arm, one end of the second arm is connected to the first arm, and the other end of the second arm is connected to the first branch point. There is a first coupling distance between the first arm and the first radiating portion, and there is a second coupling distance between the second arm and the first radiating portion, and the second coupling distance is greater than the first coupling distance.

14. The antenna structure according to claim 13, wherein: A third coupling distance is provided between the second branch and the first radiating portion, and the third coupling distance is smaller than the first coupling distance and the second coupling distance.

15. The antenna structure according to claim 10, wherein: The antenna structure also includes a substrate having a first surface and a second surface. The first surface and the second surface are respectively located on opposite sides of the substrate. The first radiation part, the feeding part, the grounding part and the second radiation part are arranged on the first surface.

16. The antenna structure according to claim 15, wherein: The first radiation element further includes a second radiation portion, which is disposed on the second surface and connected to the first radiation portion. The projection area of ​​the second radiation portion vertically projected on the first surface partially overlaps with the feeding portion.

17. The antenna structure according to claim 16, wherein: The first radiation element further includes a third radiation portion, which is disposed on the second surface and connected to the first radiation portion. The projection area of ​​the third radiation portion vertically projected on the first surface partially overlaps with the ground portion.

18. The antenna structure according to claim 10, wherein: The antenna structure also includes an inductor element, which is connected between the fourth branch and the proximity sensing circuit; the switching circuit includes a signal conduction path and at least one transmission path, the signal conduction path is electrically connected to the third branch, the at least one transmission path is electrically connected to the signal conduction path, and the at least one transmission path is respectively connected in series with at least one passive element.

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