Antenna of mobile terminal and mobile terminal

Patent metadata

Field	Value
Publication number	US-11069955-B2
Application number	US-201716495806-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	Mar 20, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

An antenna of a mobile terminal is provided. At least two slots are disposed in a metal bezel of the mobile terminal, and the two slots divide the metal bezel into a first metal section, a second metal section, and a third metal section. A radiating element of the antenna includes the second metal section located between the two slots, a first conductor, and a second conductor. The first conductor and the second conductor are separately connected to the second metal section. A feed point is connected to the first conductor by using a matching network. A ground point is connected to the second conductor to form a loop antenna. An electrical length path of current from the feed point to the second metal section is not equal to an electrical length path of current from the ground point to the second metal section.

First claim

What is claimed is:

1. An antenna of a mobile terminal, wherein the mobile terminal includes a metal bezel comprising at least two slots disposed in the metal bezel, the two slots dividing the metal bezel into a first metal section, a second metal section, and a third metal section, and the antenna comprises:
a radiating element, a matching network, a feed point, and a ground point, wherein
the radiating element comprises the second metal section located between the two slots, a first conductor, and a second conductor; the first conductor is connected to one end of the second metal section, and a connection point between the first conductor and the second metal section is a feed contact point; the second conductor is connected to the other end of the second metal section, and a connection point between the second conductor and the second metal section is a ground contact point; and a vertical distance between the feed point and the ground point is less than a vertical distance between the feed contact point and the ground contact point;
the feed point is connected to the first conductor by the matching network;
the ground point is connected to the second conductor; and
an electrical length path of current from the feed point to the second metal section is not equal to an electrical length path of current from the ground point to the second metal section, wherein the electrical length path of current from the feed point to the second metal section is substantially longer than the electrical length path of current from the ground point to the second metal section.

2. The antenna of the mobile terminal according to claim 1 , wherein the feed point and the ground point are located on one side of a central line, and the central line is a central line perpendicular to a length direction of the second metal section, among central lines of the second metal section.

3. The antenna of the mobile terminal according to claim 1 , further comprising an adjusting circuit located between the ground point and a feeder, wherein the adjusting circuit comprises a plurality of parallel branches, an inductor or a capacitor is disposed on each branch, and each branch is grounded; and the second metal section is selectively connected to one branch of the adjusting circuit.

4. The antenna of the mobile terminal according to claim 3 , wherein an inductor and a capacitor that are connected in series are disposed on at least one branch.

5. The antenna of the mobile terminal according to claim 1 , wherein an adjusting circuit is disposed in the second conductor, the adjusting circuit comprises a plurality of parallel branches, an inductor or a capacitor is disposed on each branch, and each branch is connected to the ground point; and the second metal section is selectively connected to one branch of the adjusting circuit.

6. The antenna of the mobile terminal according to claim 3 , wherein an inductor and a capacitor connected in series are disposed on at least one branch.

7. The antenna of the mobile terminal according claim 1 , further comprising at least one parasitic element.

8. The antenna of the mobile terminal according to claim 7 , wherein the parasitic element is the first metal section, or the third metal section, or the first metal section and a metal patch disposed at a slot endpoint of the first metal section, or the third metal section and a metal patch disposed on a slot endpoint of the third metal section.

9. The antenna of the mobile terminal according to claim 1 , wherein the first conductor is a flexible circuit board, a metal conductive plate, a laser layer, or a thin-layer conductor.

10. The antenna of the mobile terminal according to claim 1 , further comprising a third conductor, wherein two ends of the third conductor are respectively connected to the first conductor and the second conductor.

11. A mobile terminal comprising:
a metal bezel including at least two slots disposed in the metal bezel, the two slots dividing the metal bezel into a first metal section, a second metal section, and a third metal section that are insulated from each other; and
an antenna, wherein the antenna comprises a radiating element, a matching network, a feed point, and a ground point, wherein
the radiating element comprises the second metal section located between the two slots, a first conductor, and a second conductor; the first conductor is connected to one end of the second metal section, and a connection point between the first conductor and the second metal section is a feed contact point; the second conductor is connected to the other end of the second metal section, and a connection point between the second conductor and the second metal section is a ground contact point; and a vertical distance between the feed point and the ground point is less than a vertical distance between the feed contact point and the ground contact point;
the feed point is connected to the first conductor by the matching network;
the ground point is connected to the second conductor; and
an electrical length path of current from the feed point to the second metal section is not equal to an electrical length path of current from the ground point to the second metal section, wherein the electrical length path of current from the feed point to the second metal section is substantially longer than the electrical length path of current from the ground point to the second metal section.

12. The mobile terminal according to claim 11 , wherein the feed point and the ground point are located on one side of a central line, and the central line is a central line perpendicular to a length direction of the second metal section, among central lines of the second metal section.

13. The mobile terminal according to claim 11 , further comprising an adjusting circuit located between the ground point and a feeder, wherein the adjusting circuit comprises a plurality of parallel branches, an inductor or a capacitor is disposed on each branch, and each branch is grounded; and the second metal second is selectively connected to one branch of the adjusting circuit.

14. The mobile terminal according to claim 13 , wherein an inductor and a capacitor that are connected in series are disposed on at least one branch.

15. The mobile terminal according to claim 11 , wherein an adjusting circuit is disposed in the second conductor, the adjusting circuit comprises a plurality of parallel branches, an inductor or a capacitor is disposed on each branch, and each branch is connected to the ground point; and the second metal section is selectively connected to one branch of the adjusting circuit.

16. The mobile terminal according to claim 15 , wherein an inductor and a capacitor connected in series are disposed on at least one branch.

17. The mobile terminal according to claim 11 , further comprising at least one parasitic element.

18. The mobile terminal according to claim 17 , wherein the parasitic element is the first metal section, or the third metal section, or the first metal section and a metal patch disposed at a slot endpoint of the first metal section, or the third metal section and a metal patch disposed on a slot endpoint of the third metal section.

19. The mobile terminal according to claim 11 , wherein the first conductor is a flexible circuit board, a metal conductive plate, a laser layer, or a thin-layer conductor.

20. The mobile terminal according to claim 11 , further comprising a third conductor, wherein two ends of the third conductor are respectively connected to the first cond

Assignees

• Huawei Tech Co Ltd

Inventors

• Ying Lijun
• Wang Hanyang
• Xue Liang
• You Jiaqing
• Lee Chien-Ming
• Yang Xiaoli
• Yu Dong
• Wang Lei

Classifications

• H01Q5/371

  Branching current paths · CPC title

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q1/44 Primary

  using equipment having another main function to serve additionally as an antenna {, e.g. means for giving an antenna an aesthetic aspect}(H01Q1/27 - H01Q1/34 take precedence) · CPC title

• H01Q1/50

  Structural association of antennas with earthing switches, lead-in devices or lightning protectors · CPC title

• H01Q9/045

  with particular feeding means (for circular polarisation H01Q9/0428) · CPC title