Antenna structure and wireless communication device

• US 9,680,203 B2
• Filed: 12/27/2013
• Issued: 06/13/2017
• Est. Priority Date: 05/14/2013
• Status: Active Grant

• Current Assignee: Chiun Mai Communication Systems, Inc. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Chuin MAI Communication Systems Incorporated
• Inventors: Lin, Yen-Hui, Liou, Geng-Hong
• Primary Examiner(s): Smith, Graham
• Assistant Examiner(s): Maldonado, Noel
• Application Number:
  US14/141,677
• Publication Number:
  US 20140340280A1
• Time in Patent Office: 1,264 Days
• Field of Search: 343702, 343846
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 5/371 Branching current paths

Abstract

An antenna structure includes a metal member, an extending section, and a metal sheet. The metal member defines a gap. The gap divides the metal member into a first portion and a second portion. The extending section is connected to the first portion of the metal ember to cooperatively form a first antenna. The first antenna, the metal sheet and the second portion of the metal portion cooperatively form a second antenna.

Claims

1. An antenna structure, comprising:

a metal member being a frame structure and comprising a first frame leg, a second frame leg and a third frame leg, the first frame leg comprising two ends, wherein the second frame leg perpendicularly connects to one end of the first frame leg and the third frame leg perpendicularly connects to the other end of the first frame leg, and wherein the first frame leg defines a gap, the gap divides the first frame leg into a first panel portion and a second panel portion, spaced apart from the first panel portion, the first panel portion connects to the second frame leg to form a first portion, and the second panel portion connects to the third frame leg to form a second portion;

an extending section perpendicularly connected to one side of the first panel portion where the second frame leg is positioned, the extending section being parallel to the second frame leg, wherein the first panel portion, the second frame leg, and the extending section together form a first antenna; and

a metal sheet, wherein the first antenna, the metal sheet, and the second portion of the metal member together form a second antenna.

2. The antenna structure of claim 1, wherein the metal sheet comprises two opposite first edges and two opposite second edges, one of the first edges faces the gap, one of the second edges is parallel to and spaced apart from the extending section, the extending section and the metal sheet generate a coupling and resonance effect.

3. The antenna structure of claim 1, wherein the first panel portion comprises a first connecting point adjacent to an end of the second frame leg to feed current to the antenna structure, wherein when the current is fed into the first connecting point, a first portion of the current flows through the extending section, and a second portion of the current flows through the second frame leg, wherein the extending section and the second frame leg together form a first antenna path.

4. The antenna structure of claim 3, wherein a third portion of the current flowing to a distal end of the first panel portion flows through the second panel portion and finally flows into the ground point through the third frame leg;

the current flowing though the extending section flows through the metal sheet, and then flows through the second panel portion, and finally flows into the ground point through the third frame leg;

wherein the current fed into the metal sheet from the circuit board also flows through the second panel portion and finally flows into the ground point through the third frame leg; and

wherein the first panel portion, the metal sheet, the second panel portion, and the third frame leg together form a second antenna path.

5. A wireless communication device, comprising:

a circuit board, the circuit board comprising a feed point and a ground point;

an antenna structure connected to the feed point and the ground point, the antenna structure comprising;

a metal member, the metal member being a frame structure and comprising a first frame leg, a second frame leg and a third frame leg, the first frame leg comprises two ends, wherein the second frame leg perpendicularly connects to one end of the first frame leg and the third frame perpendicularly connects to the other end of the first frame leg, and wherein the first frame leg defines a gap, the gap divides the first frame leg into a first panel portion and a second panel portion, spaced apart from the first panel portion, the first panel portion connects to the second frame leg to form a first portion, and the second panel portion connects to the third frame leg to form a second portion;

an extending section, the extending section perpendicularly connected to one side of the first panel portion where the second frame leg is positioned, the extending section being parallel to the second frame leg, wherein the first panel portion, the second frame leg, and the extending section together form a first antenna; and

a metal sheet, wherein the first antenna, the metal sheet, and the second portion of the metal member together form a second antenna.

6. The wireless communication device of claim 5, wherein the second frame leg and the third frame leg are electronically connected to the ground point, the metal sheet comprises two opposite first edges and two opposite second edges, one of the first edges faces the gap, one of the second edges is parallel to and spaced apart from the extending section, the extending section and the metal sheet generate a coupling and resonance effect.

7. The wireless communication device of claim 5, wherein the first panel portion comprises a first connecting point adjacent to an end of the second frame leg connected to the feed point, wherein when the current is fed into the first connecting point, a first portion of the current flows through the extending section and a second portion of the current flows through the second frame leg, wherein the extending section and the second frame leg together form a first antenna path.

8. The wireless communication device of claim 7, wherein a third portion of the current flowing to a distal end of the first panel portion flows through the second panel portion and finally flows into the ground point through the third frame leg;

wherein the current flowing though the extending section flows through the metal sheet, and then flows through the second panel portion and finally flows into the ground point through the third frame leg;

current fed into the metal sheet from the circuit board also flows through the second panel portion and finally flows into the ground point through the third frame leg; and

wherein the first panel portion, the metal sheet, the second panel portion, and the third frame leg together form a second antenna path.