Back cover for electronic device and electronic device

Patent metadata

Field	Value
Publication number	US-10700409-B2
Application number	US-201816221616-A
Country	US
Kind code	B2
Filing date	Dec 17, 2018
Priority date	Sep 27, 2018
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A back cover includes a metal body having a first side, a second side, and a groove that is formed at the first side. The metal body further has a first radiator, a second radiator, and a ground radiator. The first radiator is disposed in the groove, and has a main portion and a support portion that cooperatively form a T-shape. The main portion includes a feeding end adjacent to a closed end of the groove. The second radiator is adjacently connected to the groove and is defined by the first and second sides, and an edge of the groove. The ground radiator is formed by a portion of the metal body excluding the first and second radiators. The second radiator and the support portion are connected to the ground radiator. The first and second radiators, and the ground radiator are serve as an antenna structure.

First claim

What is claimed is:

1. A back cover for electronic device, the back cover comprising:
a metal body, having at least one first side, a second side adjacent to the at least one first side, and at least one groove formed at the at least one first side, the metal body further having:
at least one first radiator, disposed in the at least one groove, wherein each of the at least one first radiator has a main portion and a support portion, the main portion and the support portion cooperatively form a T-shape, the main portion includes a feeding end adjacent to a closed end of the groove, each of the at least one first radiator is operated in a first band;
at least one second radiator, adjacently connected to the at least one groove and defined by the at least one first side, the second side, and at least one edge of the at least one groove, each of the at least one second radiator operated in a second band; and
a ground radiator, formed by a portion of the metal body that excludes the at least one first radiator and the at least one second radiator, the at least one second radiator and the at least one support portion connected to the ground radiator, wherein the at least one first radiator, the at least one second radiator, and the ground radiator cooperatively serve as at least one antenna structure.

2. The back cover according to claim 1 , wherein a width of each of the at least one groove is between 2 millimeters and 2.5 millimeters.

3. An electronic device, comprising:
the back cover according to claim 2 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

4. The back cover according to claim 1 , wherein a length of the main portion is between 10 millimeters and 12.5 millimeters, and a width of the main portion is between 1.5 millimeters and 2 millimeters.

5. An electronic device, comprising:
the back cover according to claim 4 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

6. The back cover according to claim 1 , wherein a length of each of the at least one first radiator is ¼ times a wavelength of the first band, and a length of each of the at least one second radiator is equal to a recess depth of each of the at least one groove, and the length of each of the at least one second radiator is ¼ times a wavelength of the second band.

7. An electronic device, comprising:
the back cover according to claim 6 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

8. The back cover according to claim 1 , wherein a distance between the support portion of the first radiator and the feeding end is between ½ and ⅔ times a length of the main portion.

9. An electronic device, comprising:
the back cover according to claim 8 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

10. The back cover according to claim 1 , wherein a sum of a width of each of the at least one second radiator and a width of a corresponding one of the at least one groove is less than or equal to 5 millimeters.

11. An electronic device, comprising:
the back cover according to claim 10 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

12. The back cover according to claim 1 , further comprising at least one non-conductor filler filled in the at least one groove.

13. An electronic device, comprising:
the back cover according to claim 12 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

14. The back cover according to claim 1 , wherein the at least one first side includes two first sides, the two first sides are opposite to each other, the second side is located between the two first sides and connected to the two first sides, the at least one first radiator includes two first radiators, the at least one second radiator includes two second radiators, one of the first radiators and a corresponding one of the second radiators as well as the other one of the first radiators and a corresponding one of the second radiators are symmetrically disposed on the metal body.

15. An electronic device, comprising:
the back cover according to claim 14 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

16. An electronic device, comprising:
the back cover according to claim 1 ;
a circuit board, including a wireless communication module; and
at least one coaxial transmitting wire, connecting the at least one antenna structure to the wireless communication module.

17. The electronic device according to claim 16 , further comprising a display screen, wherein an orthogonal projection of the display screen with respect to the back cover does not overlap the at least one antenna structure.

Assignees

• Acer Inc

Inventors

• Huang Shih-Ting
• Lin Ching-Chi
• Chen Chien-Wen
• Wang chuan-chun

Classifications

• H01Q9/42

  with folded element, the folded parts being spaced apart a small fraction of the operating wavelength · CPC title

• H01Q5/364

  Creating multiple current paths · CPC title

• H01Q1/2266 Primary

  disposed inside the computer · CPC title

• G06F1/1698 Primary

  the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone (details of antennas disposed inside a computer H01Q1/2266) · CPC title

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title