Antenna assembly and electronic device

Abstract

Provided in the present invention are an antenna assembly and an electronic device, the antenna assembly comprising a rectangular metal frame (100), wherein the metal frame (100) comprises an inner frame (110) and an outer frame (120), a first frame (121) of the outer frame (120) is provided with a first notch (120), a second frame (122) of the outer frame (120) is provided with a second notch (140), the first notch and the second notch (140) divide the outer frame (120) into a metal antenna (150), the metal antenna (150) is connected to the inner frame (110) by means of a metal connector (160), the portion of the metal antenna (150) between the metal connector (160) and the first notch (130) forms a first radiation branch (151), the portion of the metal antenna (150) between the metal connecting member (160) and the second notch (140) forms a second radiation branch (152), and the length of the first radiation branch (151) is less than that of the second radiation branch (152); and the first frame (121) and the second frame (122) are two adjacent frames of the outer frame (120), the metal connecting member (160) and the second notch (140) are both located on one side where the second frame (122) is located, and the metal connecting member (160) is located between the second notch (140) and the first frame (121). (FIG. 1)

Description

Antenna assembly and electronic device

[0001] Cross Reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 201911374802.8 filed in China on December 27, 2019, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of communication, and in particular to an antenna assembly and an electronic device. BACKGROUND

[0004] With the development of technology, the antenna space of electronic devices is continuously compressed, making the design of antennas more and more difficult, especially the design of full-band low-frequency antennas.

[0005] The commonly used solution is to design the antenna on the side frame of the electronic device, using an antenna splitting or non-splitting, single-break or multi-break scheme; in particular, for low-frequency antenna signals, due to the requirement of electrical length, the low-frequency branch part needs to be completely arranged on the side frame. However, the side frame of the electronic device needs to reserve the installation position of the power key and the volume key, thereby limiting the length of the antenna arranged on the side frame, especially the low-frequency branch part, and thus reducing the radiation efficiency of the antenna.

[0006] SUMMARY

[0007] The embodiments of the present application provide an antenna assembly and an electronic device to solve the problem of low radiation efficiency of the existing antenna assembly.

[0008] To solve the above technical problems, the present application is implemented as follows:

[0009] In a first aspect, the embodiments of the present application provide an antenna assembly, comprising: a metal frame in a rectangular shape, the metal frame comprising an inner frame and an outer frame, a first side frame of the outer frame being provided with a first break, a second side frame of the outer frame being provided with a second break, the first break and the second break dividing the outer frame into a metal antenna, the metal antenna being connected with the inner frame through a metal connecting piece, a part of the metal antenna between the metal connecting piece and the first break forming a first radiation branch, a part of the metal antenna between the metal connecting piece and the second break forming a second radiation branch, and the length of the first radiation branch being less than the length of the second radiation branch.

[0010] The first side frame and the second side frame are two adjacent side frames of the outer frame, the metal connecting piece and the second break are both located on one side of the second side frame, and the metal connecting piece is located between the second break and the first side frame.

[0011] In a second aspect, the embodiments of the present application further provide an electronic device comprising the above antenna assembly.

[0012] In the embodiments of the present application, the metal frame comprises an inner frame and an outer frame, a first side frame of the outer frame is provided with a first break, a second side frame of the outer frame is provided with a second break, the first break and the second break divide the outer frame into a metal antenna, the metal antenna is connected with the inner frame through a metal connecting piece, a part of the metal antenna between the metal connecting piece and the first break forms a first radiation branch, a part of the metal antenna between the metal connecting piece and the second break forms a second radiation branch, and the length of the first radiation branch is less than the length of the second radiation branch; wherein the first side frame and the second side frame are two adjacent side frames of the outer frame, the metal connecting piece and the second break are both located on the side where the second side frame is located, and the metal connecting piece is located between the second break and the first side frame. In this way, by setting the second break of the second radiation branch downward, the eigenmode of the inner frame is excited, the inner frame participates in radiation, and thus the radiation efficiency of the antenna assembly can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0014] FIG. 1 is a structural schematic diagram of an antenna assembly provided by the embodiments of the present application;

[0015] FIG. 2 is a structural schematic diagram of an antenna assembly provided by the embodiments of the present application. DETAILED DESCRIPTION

[0016] The technical solutions of the embodiments of the present application will be described clearly and completely in the following description of the embodiments of the present application with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0017] As shown in FIG. 1 and FIG. 2, the embodiment of the present application provides an antenna assembly, comprising: a rectangular metal frame 100, the metal frame 100 comprising an inner frame 110 and an outer frame 120, a first side frame 121 of the outer frame 120 being provided with a first break 130, a second side frame 122 of the outer frame 120 being provided with a second break 140, the first break 130 and the second break 140 dividing the outer frame 120 into a metal antenna 150, the metal antenna 150 being connected with the inner frame 110 through a metal connecting piece 160, a part of the metal antenna 150 between the metal connecting piece 160 and the first break 130 forming a first radiation branch 151, a part of the metal antenna 150 between the metal connecting piece 160 and the second break 140 forming a second radiation branch 152, and the length of the first radiation branch 151 being less than the length of the second radiation branch 152.

[0018] Wherein, the first side frame 121 and the second side frame 122 are two adjacent side frames of the outer frame 120, the metal connecting piece 160 and the second break 140 are both located on one side of the second side frame 122, and the metal connecting piece 160 is located between the second break 140 and the first side frame 121. The first side frame 121 is a short side of the outer frame 120, and the second side frame 122 is a long side of the outer frame 120.

[0019] In the embodiment, the metal antenna 150 is connected with the inner frame 110 through the metal connecting piece 160, and since the inner frame 110 is equivalent to a ground terminal, the metal connecting piece 160 can be equivalent to a common ground terminal of the first radiation branch 151 and the second radiation branch 152; and since the length of the second radiation branch 152 is greater than the length of the first radiation branch 151, and the second break 140 of the second radiation branch 152 faces downward, the intrinsic mode of the inner frame 110 can be excited, so that the inner frame 110 also participates in radiation, thereby greatly improving the radiation efficiency of the antenna assembly.

[0020] Optionally, the length of the first side frame 121 is less than the length of the second side frame 122, i.e. the first side frame 121 is a short side frame of the outer frame 120, and the second side frame 122 is a long side frame of the outer frame 120; in this way, by arranging the second radiation branch 152 with the longer length on the side of the second side frame 122 with the longer length, the distribution space of the second radiation branch 152 can be effectively increased, and by arranging the second break 140 of the second radiation branch 152 to face downward, the intrinsic mode of the inner frame 110 can be excited, so that the inner frame 110 participates in radiation, thereby improving the radiation efficiency of the second radiation branch 152 without increasing the length of the second radiation branch 152, so as to meet the installation of the side key of the electronic device.

[0021] The first radiation branch 151 can be a middle-high frequency radiation branch of the antenna assembly, and the second radiation branch 152 can be a low frequency radiation branch of the antenna assembly. By adopting the scheme provided in the application, the efficiency of the antenna assembly can be improved by about 3dB by setting the second fracture 140 of the second radiation branch 152 downward to excite the eigenmode of the inner frame 110, so that the inner frame 110 participates in radiation. The efficiency of the low frequency full frequency segment is about -7dB. Moreover, by the high-low frequency splitting scheme, the antenna assembly provided in the application can meet the full frequency segment requirements of 696MHZ-960MHZ and 1710MHZ-2690MHZ, has good isolation between the radiation branches, and can meet the needs of product engineering.

[0022] The first gap 191 is formed between the first radiation branch 151 and the inner frame 110, and the second gap 192 is formed between the second radiation branch 152 and the inner frame 110. The first gap 191 and the second gap 192 are set to form a clearance between the first radiation branch 151, the second radiation branch 152 and the inner frame 110, so as to improve the radiation efficiency of the antenna assembly.

[0023] Optionally, the antenna assembly further comprises a first ground switch circuit 171, a first matching circuit 172 and a first feed source 173. The first radiation branch 151 is provided with a first switch lead-through portion 1511 and a first feed source lead-through portion 1512. The first switch lead-through portion 1511 is electrically connected with the first ground switch circuit 171, and the first feed source lead-through portion 1512 is electrically connected with the first feed source 173 through the first matching circuit 172.

[0024] The first switch lead-through portion 1511 is located at one end of the first radiation branch 151 close to the first fracture 130, and the first feed source lead-through portion 1512 is located between the first switch lead-through portion 1511 and the metal connecting piece 160.

[0025] Optionally, the antenna assembly further comprises a second ground switch circuit 181, a second matching circuit 182 and a second feed source 183. The second radiation branch 152 is provided with a second switch lead-through portion 1521 and a second feed source lead-through portion 1522. The second switch lead-through portion 1521 is electrically connected with the second ground switch circuit 181, and the second feed source lead-through portion 1522 is electrically connected with the second feed source 183 through the second matching circuit 182.

[0026] The second switch lead-through portion 1521 is located at one end of the second radiation branch 152 close to the second fracture 140, and the second feed source lead-through portion 1522 is located between the second switch lead-through portion 1521 and the metal connecting piece 160.

[0027] In the above embodiment, the first ground switch circuit 171 can include inductors L3 / L4 / L5, and the second ground switch circuit 181 can include capacitors C1 / C2 / C3, wherein the first radiation branch 151 can be excited by the first feed source 173, and the second radiation branch 152 can be excited by the second feed source 183.

[0028] The implementation of the antenna frequency band can include:

[0029] When the first ground switch circuit 171 is in the off state, the antenna resonates in the B3 mode; by switching the inductors L3 / L4 / L5, the coverage of the B1 / B40 / B41 frequency band can be realized, respectively.

[0030] When the second ground switch circuit 181 is in the off state, the antenna resonates in the B8 mode; by switching the capacitors C1 / C2 / C3, the coverage of the B5 / B20 / B28 frequency band can be realized, respectively.

[0031] In the specific implementation of the antenna assembly provided in the embodiment of the application, for a metal frame 100 with a width size of 73 mm and a length size of 157 mm, the size of each part of the antenna assembly is designed as follows:

[0032] The gap of the first break 130 and the second break 140 is 1 mm;

[0033] The width of the metal connecting piece 160 is 1.5 mm;

[0034] The length of the first radiation branch 151 is 29 mm, wherein the distance between the first switch lead-in part 1511 and the first break 130 is 3.5 mm, the distance between the first switch lead-in part 1511 and the first feed source lead-in part 1512 is 23.5 mm, and the distance between the first feed source lead-in part 1512 and the metal connecting piece 160 is 2 mm;

[0035] The length of the second radiation branch 152 is 44.5 mm, wherein the distance between the second switch lead-in part 1521 and the second break 140 is 17 mm, the distance between the second switch lead-in part 1521 and the second feed source lead-in part 1522 is 11.5 mm, and the distance between the second feed source lead-in part 1522 and the metal connecting piece 160 is 17 mm;

[0036] The width of the second gap 192 is 1.5 mm, and when the antenna assembly is assembled on the whole machine, the second gap 192 can be shortened to 0.5 mm due to the presence of the display screen.

[0037] The antenna assembly provided in the embodiment of the application can greatly improve the radiation efficiency of the antenna assembly by setting the second break 140 of the second radiation branch 152 downward to excite the eigenmode of the inner frame 110, so that the inner frame 110 participates in radiation.

[0038] The embodiment of the present application also provides an electronic device comprising the antenna assembly.

[0039] It should be noted that the implementation manners of the above antenna assembly embodiments are also applicable to the electronic device embodiments and can achieve the same technical effects, which will not be described herein again.

[0040] The above describes the embodiments of the present application in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. An antenna assembly, comprising: A rectangular metal frame includes an inner frame and an outer frame. The first edge of the outer frame has a first break, and the second edge of the outer frame has a second break. The first break and the second break divide the outer frame into a metal antenna. The metal antenna is connected to the inner frame by a metal connector. The portion of the metal antenna located between the metal connector and the first break forms a first radiating branch, and the portion of the metal antenna located between the metal connector and the second break forms a second radiating branch. The length of the first radiating branch is less than the length of the second radiating branch. Wherein, the first frame and the second frame are two adjacent frames of the outer frame, the metal connector and the second break are both located on the side of the second frame, and the metal connector is located between the second break and the first frame.

2. The antenna assembly according to claim 1, wherein, The length of the first border is less than the length of the second border.

3. The antenna assembly according to claim 2, wherein, It also includes a first grounding switch circuit, a first matching circuit, and a first feed source. The first radiating branch is provided with a first switch conductor and a first feed source conductor. The first switch conductor is electrically connected to the first grounding switch circuit, and the first feed source conductor is electrically connected to the first feed source through the first matching circuit.

4. The antenna assembly according to claim 3, wherein, The first switch conductor is located at one end of the first radiating branch near the first break, and the first feed conductor is located between the first switch conductor and the metal connector.

5. The antenna assembly according to claim 2, wherein, It also includes a second grounding switch circuit, a second matching circuit, and a second feed source. The second radiating branch is provided with a second switch conductor and a second feed source conductor. The second switch conductor is electrically connected to the second grounding switch circuit, and the second feed source conductor is electrically connected to the second feed source through the second matching circuit.

6. The antenna assembly according to claim 5, wherein, The second switch conductor is located at one end of the second radiating branch near the second break, and the second feed conductor is located between the second switch conductor and the metal connector.

7. The antenna assembly according to any one of claims 1 to 6, wherein, The first radiation branch is a medium-to-high frequency radiation branch.

8. The antenna assembly according to any one of claims 1 to 6, wherein, The second radiation branch is the low-frequency radiation branch.

9. The antenna assembly according to any one of claims 1 to 6, wherein, The first radiating branch has a first gap with the inner frame, and the second radiating branch has a second gap with the inner frame.

10. An electronic device comprising an antenna assembly as claimed in any one of claims 1 to 9.