CN-224218620-U - Middle frame assembly and electronic equipment

Abstract

The disclosure relates to a middle frame assembly and electronic equipment, wherein the middle frame assembly comprises a middle frame, a first matching circuit and a second matching circuit, the middle frame comprises a supporting part and a frame surrounding the supporting part, the frame comprises a top frame, a break joint is arranged on the top frame, the top frame on one side of the break joint forms a first antenna radiator, a first feed point, a second feed point and a first grounding point are arranged on the first antenna radiator at intervals, a first end of the first matching circuit is connected with a first radio frequency end, a second end of the first matching circuit is connected with the first feed point, the first matching circuit is used for enabling the first antenna radiator to radiate radiation signals of at least a first frequency band, a first end of the second matching circuit is connected with the second radio frequency end, a second end of the second matching circuit is connected with the second feed point, the second matching circuit is used for enabling the first antenna radiator to radiate radiation signals of at least a second frequency band, and the second frequency band is different from the first frequency band. Thus, the stability of the antenna performance is improved.

Inventors

• LIANG HAOZHE

Assignees

• 北京小米移动软件有限公司

Dates

Publication Date

20260508

Application Date

20250407

Claims (16)

1. 1. A center assembly, the center assembly comprising: the middle frame comprises a supporting part and a frame surrounding the supporting part, the frame comprises a top frame, a fracture is formed in the top frame, the top frame located at one side of the fracture forms a first antenna radiator, and a first feed point, a second feed point and a first grounding point are arranged on the first antenna radiator at intervals; The first end of the first matching circuit is connected with a first radio frequency end, the second end of the first matching circuit is connected with the first feed point, and the first matching circuit is used for enabling the first antenna radiator to radiate at least radiation signals of a first frequency band; The first end of the second matching circuit is connected with the second radio frequency end, the second end of the second matching circuit is connected with the second feed point, the second matching circuit is used for enabling the first antenna radiator to radiate at least radiation signals of a second frequency band, and the second frequency band is different from the first frequency band.
2. 2. The mullion assembly of claim 1, wherein the first matching circuit comprises a first capacitor, a first inductor, and a second capacitor, the first capacitor and the first inductor being connected in series between the first radio frequency terminal and the first feed point, one end of the second capacitor being connected between the first capacitor and the first inductor, the other end of the second capacitor being grounded.
3. 3. The mullion assembly of claim 2, wherein the mullion assembly further comprises: The first isolation circuit is connected with the first matching circuit and is used for achieving isolation between the first matching circuit and the second matching circuit.
4. 4. The mullion assembly of claim 3, wherein the first isolation circuit comprises: and one end of the first passive device is connected between the first inductor and the first capacitor, and the other end of the first passive device is grounded.
5. 5. The center assembly of claim 4, wherein the first frequency band is a WiFi 5G frequency band, the first passive device is a second inductor, and an inductance value of the second inductor is 1n to 1.5n.
6. 6. The mullion assembly of claim 1, wherein the second matching circuit comprises: And the third capacitor is connected in series between the second radio frequency end and the second feed point.
7. 7. The mullion assembly of claim 6, wherein the mullion assembly further comprises: And the second isolation circuit is connected with the second matching circuit and is used for realizing isolation between the first matching circuit and the second matching circuit.
8. 8. The mullion assembly of claim 7, wherein the second isolation circuit comprises: And one end of the second passive device is connected between the third capacitor and the second feed point, and the other end of the second passive device is grounded.
9. 9. The center assembly of claim 8, wherein the second frequency band is a GPS L5 frequency band, the second passive device is a fourth capacitor, and the fourth capacitor has a capacitance value of 6p to 7p.
10. 10. The center assembly of any of claims 1-9, wherein the second feed point is located between the first feed point and the first ground point, the first feed point being closer to the break than the second feed point.
11. 11. The center assembly according to any one of claims 1 to 9, wherein the top rim on the other side of the break constitutes a second antenna radiator, and the length of the second antenna radiator is smaller than the length of the first antenna radiator, the second antenna radiator being configured to radiate radiation signals of at least a third frequency band, the third frequency band being different from the first frequency band and the second frequency band.
12. 12. The center assembly of claim 11, wherein a third feed point and a second ground point are disposed on the second antenna radiator, the third feed point being located between the break and the second ground point, the third feed point being connected to a third radio frequency end for radiating a radiated signal in at least one of the third frequency bands.
13. 13. The mullion assembly of claim 12, wherein the mullion assembly further comprises: And the third matching circuit is connected with the second antenna radiator and is used for adjusting the equivalent branch lengths of the first frequency band and the third frequency band.
14. 14. The mullion assembly of claim 13, wherein the third matching circuit comprises: And one end of the fifth capacitor is connected between the break joint and the third feed point, and the other end of the fifth capacitor is grounded.
15. 15. The mullion assembly of claim 11, wherein at least one of the third frequency bands includes a wifi2.4g band and a GPS L1 band.
16. 16. An electronic device comprising a center assembly according to any one of claims 1 to 15.

Description

Middle frame assembly and electronic equipment Technical Field The disclosure relates to the field of electronic equipment, in particular to a middle frame assembly and electronic equipment. Background Along with the gradual development of miniaturization of electronic devices, more and more electronic devices utilize metal frames of a middle frame to realize multi-band antenna design. However, in the related art, the manner of implementing the multi-band antenna design by using the metal frame has a problem of unstable antenna performance. Disclosure of utility model In order to overcome the problems in the related art, the present disclosure provides a middle frame assembly and an electronic device. According to the first aspect of the disclosure, a middle frame assembly is provided, the middle frame assembly comprises a middle frame, the middle frame comprises a supporting portion and a top frame surrounding the supporting portion, the top frame comprises a top frame, a fracture is formed in the top frame, the top frame located on one side of the fracture forms a first antenna radiating body, a first feeding point, a second feeding point and a first grounding point are arranged on the first antenna radiating body at intervals, a first matching circuit is connected with a first radio frequency end at a first end of the first matching circuit, a second end of the first matching circuit is connected with the first feeding point, the first matching circuit is used for enabling the first antenna radiating body to radiate radiation signals of at least a first frequency band, a first end of the second matching circuit is connected with a second radio frequency end, a second end of the second matching circuit is connected with the second feeding point, and the second matching circuit is used for enabling the first antenna radiating body to radiate radiation signals of at least a second frequency band, and the first frequency band is different from the first frequency band. In some embodiments of the disclosure, the first matching circuit includes a first capacitor, a first inductor, and a second capacitor, where the first capacitor and the first inductor are connected in series between the first radio frequency end and the first feeding point, one end of the second capacitor is connected between the first capacitor and the first inductor, and the other end of the second capacitor is grounded. In some embodiments of the present disclosure, the middle frame assembly further includes a first isolation circuit connected to the first matching circuit, the first isolation circuit configured to isolate the first matching circuit from the second matching circuit. In some embodiments of the present disclosure, the first isolation circuit includes a first passive device having one end connected between the first inductor and the first capacitor and the other end grounded. In some embodiments of the disclosure, the first frequency band is a WiFi 5G frequency band, the first passive device is a second inductor, and an inductance value of the second inductor is 1n to 1.5n. In some embodiments of the present disclosure, the second matching circuit includes a third capacitor connected in series between the second radio frequency terminal and the second feed point. In some embodiments of the present disclosure, the middle frame assembly further includes a second isolation circuit connected to the second matching circuit, the second isolation circuit configured to isolate the first matching circuit from the second matching circuit. In some embodiments of the present disclosure, the second isolation circuit includes a second passive device having one end connected between the third capacitor and the second feeding point and the other end grounded. In some embodiments of the disclosure, the second frequency band is a GPS L5 frequency band, the second passive device is a fourth capacitor, and a capacitance value of the fourth capacitor is 6p to 7p. In some embodiments of the disclosure, the second feed point is located between the first feed point and the first ground point, the first feed point being closer to the break than the second feed point. In some embodiments of the disclosure, the top frame located at the other side of the break forms a second antenna radiator, and a length of the second antenna radiator is smaller than a length of the first antenna radiator, where the second antenna radiator is configured to radiate a radiation signal of at least a third frequency band, and the third frequency band is different from the first frequency band and the second frequency band. In some embodiments of the present disclosure, a third feeding point and a second grounding point are disposed on the second antenna radiator, the third feeding point is located between the break and the second grounding point, the third feeding point is connected to a third radio frequency end, and the third radio frequency end is used for radiating a r