Antenna, middle frame assembly and electronic equipment

Abstract

The utility model relates to an antenna, a middle frame assembly and electronic equipment, the antenna comprises a first antenna assembly and a second antenna assembly, and a metal piece is located on the first antenna assembly; a gap is arranged between one end of the metal piece and the circuit board, and the gap forms a stray capacitor. According to the antenna, a natural filter circuit can be formed through the arranged metal piece, the filtering effect is achieved, an LC filter circuit does not need to be independently arranged, therefore, occupied space is reduced, meanwhile, the manufacturing cost is reduced, and the narrow-band characteristic of the LC filter circuit does not occur.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technologies, and in particular, to an antenna, a middle frame assembly, and an electronic device. Background Art

[0002] In the antenna structure with radiator multiplexing in the related art, an LC filter circuit needs to be set up for decoupling to avoid strong coupling between different frequency bands. However, setting up the LC filter circuit will cause the antenna efficiency to decrease, and at the same time, it requires a relatively large structural space, resulting in relatively limited layout of related electronic devices. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide an antenna, a middle frame assembly, and an electronic device to solve the problems in the above-mentioned related technologies.

[0004] To achieve the above purpose, one aspect of the present disclosure provides an antenna, including:

[0005] A first antenna component and a second antenna component;

[0006] The metal part is located in the first antenna component;

[0007] A gap is provided between one end of the metal part and the circuit board, and the gap forms a parasitic capacitance.

[0008] Optionally, the first antenna component and the second antenna component are used to be connected to the middle frame body and are located on both sides of the slit of the middle frame body, and the metal part is close to the slit.

[0009] Optionally, the linear distance between the metal part and the side of the slit close to the first antenna component is 1 mm - 5 mm.

[0010] Optionally, the frequency band of the radiation wave emitted by the first antenna component is less than the frequency band of the radiation wave emitted by the second antenna component.

[0011] Optionally, the communication frequency band of the first antenna component is 500 MHz - 3 GHz, and the communication frequency band of the second antenna component is 3.3 GHz - 6 GHz.

[0012] Optionally, the metal part is configured as a shrapnel or a reed, and the shrapnel or the reed is parallel to the circuit board.

[0013] Optionally, the thickness of the shrapnel or the reed is 1 mm - 2 mm;

[0014] In the direction parallel to the connection line between the first antenna component and the second antenna component, the length dimension of the shrapnel or the reed is 1 mm - 2 mm.

[0015] Optionally, in a direction parallel to the connection line between the metal part and the circuit board, the width of the gap is 0.3 mm - 1 mm.

[0016] Optionally, the parasitic capacitance can filter radiation waves with a frequency band of 0.6 GHz - 3 GHz.

[0017] The second aspect of the present disclosure further provides a middle frame assembly, including a middle frame body, a circuit board, and the antenna described above;

[0018] The circuit board is located inside the middle frame body. The first antenna assembly and the second antenna assembly of the antenna are connected to the middle frame body, and there is a gap between the end of the metal part far from the middle frame body and the circuit board.

[0019] Optionally, a groove is formed on one side of the circuit board close to the metal part. The end of the metal part far from the middle frame body extends into the groove and has the gap with the groove wall and the groove bottom.

[0020] Optionally, the groove wall and the groove bottom are set as the coupling surfaces with the metal part, and the area of the coupling surface is 5 mm 2 - 10 mm 2 .

[0021] The third aspect of the present disclosure further provides an electronic device, including the antenna described above, or the middle frame assembly described above.

[0022] Through the above technical solution, by setting a gap between the metal part and the circuit board, and the circuit board is grounded, the metal part can be coupled to the ground with the circuit board to form a filter circuit, achieving a filtering effect, so that partial frequency bands can be filtered, and the decoupling of the multi - frequency antenna multiplexing scenario of the first antenna assembly and the second antenna assembly can be realized, and the radiation performance of the first antenna assembly and the second antenna assembly can be improved respectively. In this antenna, a natural filter circuit can be formed through the set metal part to achieve a filtering effect, without the need to separately set an LC filter circuit, thereby reducing the space occupation, making the apertures of the first antenna assembly and the second antenna assembly relatively larger, reducing the manufacturing cost at the same time, and not showing the narrow - band characteristics of the LC filter circuit.

[0023] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings:

[0025] Figure 1It is a schematic structural diagram of an antenna according to an embodiment of the present disclosure;

[0026] Figure 2 It is a schematic diagram of the principle of an antenna according to an embodiment of the present disclosure.

[0027] Description of reference numerals

[0028] 1. First antenna component, 2. Second antenna component, 3. Metal part, 4. Gap, 5. Circuit board, 6. Middle frame body, 7. Broken seam, 8. Groove. Specific embodiments

[0029] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.

[0030] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, left, right" are usually defined according to the direction of the drawing plane of the accompanying drawings, and "inner, outer" refer to the inner and outer of the relevant components. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present disclosure, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0032] As the communication frequency bands required by mobile communication systems are increasing, due to the strength limitation of the mobile phone frame structure, there are certain limitations and requirements for the number of antenna radiation slots. Therefore, the reuse of antenna radiators is becoming more and more important and common.

[0033] In the related art, for the antenna structure with radiator reuse, an LC filter circuit needs to be set up to decouple to avoid strong coupling between different frequency bands. However, setting up an LC filter circuit will cause the antenna efficiency to decrease, and at the same time, it requires a large structural space, resulting in a relatively limited layout of related electronic devices and a relatively high cost.

[0034] For this reason, as Figure 1 - Figure 2 shown, one aspect of the present disclosure provides an antenna, including a first antenna component 1 and a second antenna component 2, and a metal part 3 is located in the first antenna component 1.

[0035] A gap 4 is provided between one end of the metal part 3 and the circuit board 5, and the gap 4 forms a parasitic capacitance.

[0036] Among them, the first antenna component 1 and the second antenna component 2 emit radiation waves of different frequency bands.

[0037] In the above technical solution, through the spaced arrangement of the metal part 3 and the circuit board 5, and the circuit board 5 is grounded, the metal part 3 can be coupled to the ground with the circuit board 5 to form a filter circuit, realizing the filtering function, so as to filter out some frequency bands, and thus realize the decoupling of the multi-frequency antenna multiplexing scenario of the first antenna component 1 and the second antenna component 2, and can respectively improve the radiation performance of the first antenna component 1 and the second antenna component 2. In this antenna, the metal part 3 arranged can form a natural filter circuit to realize the filtering function, and there is no need to separately set an LC filter circuit, thereby reducing the space occupation, the apertures of the first antenna component 1 and the second antenna component 2 can be made relatively larger, while reducing the manufacturing cost, and the narrow-band characteristics of the LC filter circuit will not occur.

[0038] Optionally, in an embodiment of the present disclosure, the first antenna component 1 and the second antenna component 2 are used to be connected to the middle frame body 6 and are located on both sides of the slit 7 of the middle frame body 6, and the metal part 3 is close to the slit 7. By setting like this, the first antenna component 1 and the second antenna component 2 form a multi-frequency antenna multiplexing scenario with mouth-to-mouth, and the metal part 3 can realize the decoupling of the multi-frequency antenna.

[0039] Optionally, in an embodiment of the present disclosure, the straight-line distance between the metal part 3 and the side of the slit 7 close to the first antenna component 1 is 1 mm - 5 mm. Specifically, when the frequency band of the radiation wave emitted by the second antenna component is high, the straight-line distance between the metal part 3 and the side of the slit 7 close to the first antenna component 1 is small, and when the frequency band of the radiation wave emitted by the second antenna component is low, the straight-line distance between the metal part 3 and the side of the slit 7 close to the first antenna component 1 is large. Thus, the specific value of the straight-line distance between the metal part 3 and the side of the slit 7 close to the first antenna component 1 can be set according to the frequency band of the radiation wave emitted by the second antenna component, and there is no excessive limitation here.

[0040] Optionally, in an embodiment of the present disclosure, the frequency band of the radiation wave emitted by the first antenna component 1 is less than the frequency band of the radiation wave emitted by the second antenna component 2. By setting like this, the metal part 3 can block the radiation wave emitted by the first antenna component 1, while the radiation wave emitted by the second antenna component 2 can be radiated outwards.

[0041] Optionally, in an embodiment of the present disclosure, the communication frequency band of the first antenna component 1 is 500 MHz - 3 GHz, and the communication frequency band of the second antenna component 2 is 3.3 GHz - 6 GHz.

[0042] Optionally, in some examples, the first antenna component 1 can be one of LTE B28 B5 B8, MHB LTE B3 B1 B41, GPS, Wi-Fi 2.4G, and the short message antenna. The second antenna component 2 can be Wi-Fi 5G or the N78 frequency band.

[0043] For the case where the first antenna component 1 is GPS L1 + WIFI 2.4G and the second antenna component 2 is N78 + WIFI 5G, through the filtering effect of the metal part 3 provided, the radiation efficiency of GPS L1 in the first antenna component 1 can reach 0.8 dB, and the radiation efficiency of WIFI 2.4G in the first antenna component 1 can reach 0.3 dB. The radiation efficiency of the second antenna component 2 can reach 0.7 dB.

[0044] Optionally, in an implementation manner of the present disclosure, the metal part 3 is configured as a shrapnel or a reed, and the shrapnel or the reed is parallel to the circuit board 5. By setting like this, the space occupation in the thickness direction can be reduced, and at the same time, it is beneficial to form a coupling effect with the circuit board 5. In some examples, the shrapnel or the reed is connected to the first antenna component 1 by welding. Of course, it should be noted that the metal part 3 can also be other structures, such as a metal rod and other structures, and there is no excessive limitation here.

[0045] Optionally, in an implementation manner of the present disclosure, the thickness of the shrapnel or the reed is 1 mm - 2 mm.

[0046] In the direction parallel to the connection line between the first antenna component 1 and the second antenna component 2, the length dimension of the shrapnel or the reed is 1 mm - 2 mm.

[0047] Optionally, in an implementation manner of the present disclosure, in the direction parallel to the connection line between the metal part 3 and the circuit board 5, the width of the gap 4 is 0.3 mm - 1 mm. By setting like this, it is beneficial for the metal part 3 and the circuit board 5 to be coupled to form a parasitic capacitance.

[0048] It should be noted that regarding the size of the gap 4, it can be adjusted by adjusting the positions of the metal part 3 and the circuit board 5, that is to say, when the gap 4 changes, the size of the parasitic capacitance formed by the coupling of the metal part 3 and the circuit board 5 will also change, thereby filtering the radiation waves of different frequency bands can be realized. Among them, the smaller the gap 4, the smaller the frequency band of the blocked radiation wave, and vice versa.

[0049] Optionally, in an implementation manner of the present disclosure, the parasitic capacitance can filter the radiation waves with a frequency band of 0.6 GHz - 3 GHz. By setting like this, the setting scenarios and application methods of the metal part 3 can be selected targeted.

[0050] The second aspect of the present disclosure further provides a middle frame assembly, including a middle frame body 6, a circuit board 5, and the above-mentioned antenna;

[0051] The circuit board 5 is located inside the middle frame body 6. The first antenna assembly 1 and the second antenna assembly 2 of the antenna are connected to the middle frame body 6. There is a gap 4 between the end of the metal part 3 far from the middle frame body 6 and the circuit board 5. By setting like this, the space occupation can be reduced, and at the same time, it is beneficial for the metal part 3 to be coupled with the circuit board 5.

[0052] Optionally, in an embodiment of the present disclosure, a groove 8 is formed on the side of the circuit board 5 close to the metal part 3. The end of the metal part 3 far from the middle frame body 6 extends into the groove 8 and has a gap 4 with the groove wall and the groove bottom of the groove 8. By setting like this, the metal part 3 can extend into the groove 8 of the circuit board 5, improving the space utilization rate, and at the same time, it can improve the coupling effect between the metal part 3 and the circuit board 5.

[0053] Optionally, in an embodiment of the present disclosure, the groove wall and the groove bottom of the groove 8 are set as the coupling surfaces with the metal part 3, and the area of the coupling surface is 5mm 2 -10mm 2 . By setting like this, it is beneficial for the metal part 3 to be coupled with the circuit board 5 to form a parasitic capacitance.

[0054] It should be noted that regarding the area size of the coupling surface, it can be adjusted by adjusting the width and depth of the groove 8. That is to say, when the width or depth of the groove 8 increases, the area of the coupling surface increases, and vice versa. And when the area of the coupling surface changes, the size of the parasitic capacitance formed by the coupling of the metal part 3 and the circuit board 5 will also change, thereby filtering radiation waves of different frequency bands can be realized. Among them, the larger the area of the coupling surface, the smaller the frequency band of the blocked radiation wave, and vice versa.

[0055] The third aspect of the present disclosure further provides an electronic device, including the above-mentioned antenna, or the above-mentioned middle frame assembly.

[0056] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0057] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0058] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An antenna, characterized in that: include: a first antenna assembly and a second antenna assembly; The metal part is located at the first antenna assembly; A gap is provided between one end of the metal piece and the circuit board, and the gap forms a parasitic capacitor; The first antenna assembly and the second antenna assembly are used to be connected to the middle frame body and are located on both sides of the break of the middle frame body, and the metal piece is close to the break.

2. The antenna according to claim 1, characterized in that The straight-line distance between the metal part and a side of the fracture close to the first antenna component is 1 mm-5 mm.

3. The antenna according to claim 1, characterized in that The frequency band of the radiated wave emitted by the first antenna component is smaller than the frequency band of the radiated wave emitted by the second antenna component.

4. The antenna according to claim 2, characterized in that: The communication frequency band of the first antenna assembly is 500MHz-3GHz, and the communication frequency band of the second antenna assembly is 3.3GHz-6GHz.

5. The antenna according to claim 1, characterized in that The metal piece is configured as a spring sheet or a reed sheet, and the spring sheet or the reed sheet is parallel to the circuit board.

6. The antenna according to claim 5, characterized in that The thickness of the spring sheet or the spring sheet is 1mm-2mm; In a direction parallel to a line connecting the first antenna component and the second antenna component, a length of the elastic sheet or the spring sheet is 1 mm-2 mm.

7. The antenna according to claim 1, characterized in that: In a direction parallel to a connection line between the metal member and the circuit board, a width of the gap is 0.3 mm to 1 mm.

8. The antenna according to any one of claims 1 to 7, characterized in that: The parasitic capacitor can filter the radiation waves in the frequency band of 0.6 GHz-3 GHz.

9. A middle frame assembly, characterized in that: It comprises a middle frame body, a circuit board and an antenna as claimed in any one of claims 1 to 8; The circuit board is located in the middle frame body, the first antenna component and the second antenna component of the antenna are connected to the middle frame body, and a gap is set between the end of the metal component away from the middle frame body and the circuit board.

10. The middle frame assembly according to claim 9, characterized in that: A groove is formed on one side of the circuit board close to the metal component. One end of the metal component away from the middle frame body extends into the groove and leaves the gap with the groove wall and the groove bottom.

11. The middle frame assembly according to claim 10, characterized in that: The groove wall and groove bottom of the groove are set as the coupling surface with the metal part, and the area of ​​the coupling surface is 5mm 2 -10mm 2 .

12. An electronic device, characterized in that: It comprises the antenna as described in any one of claims 1-8, or the middle frame assembly as described in any one of claims 9-11.

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