Antenna structure

• US 10,629,990 B2
• Filed: 09/29/2017
• Issued: 04/21/2020
• Est. Priority Date: 09/29/2016
• Status: Active Grant

• Current Assignee: Compal Electronics Incorporated
• Original Assignee: Compal Electronics Incorporated
• Inventors: Lee, Li-Chun, Liu, Shih-Chia, Yu, Yen-Hao, Chen, Jhin-Ciang, Wu, Chao-Lin, Lai, Jui-Hung
• Primary Examiner(s): Tran, Hai V
• Assistant Examiner(s): Bouizza, Michael M
• Application Number:
  US15/719,567
• Publication Number:
  US 20180090850A1
• Time in Patent Office: 935 Days
• CPC Class Codes: H01Q 1/2266 disposed inside the computer
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/52 Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure absorbing means H01Q17/00
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 21/064 using horn or slot aerials slotted waveguides arrays H01Q21/005
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 5/50 Feeding or matching arrangements for broad-band or multi-band operation
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence
• CPC Class Codes: H01Q 9/0457 electromagnetically coupled to the feed line
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

Abstract

An antenna structure including a metal element, a first capacitor, a second capacitor, a feeding element and an adjustment element is provided. The metal element has an open slot, and the open slot has an open end, a first slot and a second slot. The first slot and the second slot are respectively disposed on two opposite sides of the open end. The feeding element crosses the first slot. A first end of the feeding element has a feeding point, and a second end of the feeding element is electrically connected to the metal element through the first capacitor. The adjustment element is disposed in the second slot. A first end of the adjustment element is electrically connected to the metal element, and a second end of the adjustment element is electrically connected to the metal element through the second capacitor.

Claims

1. An antenna structure, comprising:

a metal element, having an open slot, and the open slot having an open end, a first slot and a second slot, wherein the first slot and the second slot are respectively disposed on two opposite sides of the open end;

a first capacitor and a second capacitor;

a feeding element, crossing the first slot, wherein a first end of the feeding element has a feeding point, the feeding point and the first capacitor are disposed on two opposite sides of the first slot, and a second end of the feeding element is electrically connected to the metal element through the first capacitor; and

an adjustment element, disposed in the second slot, wherein a first end of the adjustment element is electrically connected to the metal element, and a second end of the adjustment element is electrically connected to the metal element through the second capacitor, wherein a second end of the adjustment element and the second capacitor are interconnected with each other to form a joint, and the joint is disposed in the second slot.

2. The antenna structure as claimed in claim 1, wherein the antenna structure is operated in a first frequency band, and a length of the first slot is ¼

wavelength of the first frequency band.

3. The antenna structure as claimed in claim 2, wherein the antenna structure is further operated in a second frequency band, and a length of the second slot is ¼

wavelength of the second frequency band.

4. The antenna structure as claimed in claim 2, wherein a length from the feeding element to the open end of the open slot is ⅛

wavelength of the first frequency band.

5. The antenna structure as claimed in claim 3, wherein the antenna structure is further operated in a third frequency band, and a length from the adjustment element to the open end of the open slot is ¼

wavelength of the third frequency band.

6. The antenna structure as claimed in claim 1, wherein a length of the first slot is greater than a length of the second slot.

7. The antenna structure as claimed in claim 1, wherein the adjustment element and the second capacitor are disposed in the second slot, and the adjustment element and the second capacitor are respectively connected to two sides of the second slot.

8. The antenna structure as claimed in claim 7, wherein the open end of the open slot is located at an edge of the metal element, and a shape of the open slot is a T-shape.

9. The antenna structure as claimed in claim 8, wherein the first slot and the second slot are respectively parallel to the edge of the metal element.

10. The antenna structure as claimed in claim 1, wherein the first capacitor and the second capacitor are respectively a chip capacitor or a distributed capacitor.

11. The antenna structure as claimed in claim 1, wherein the second capacitor comprises:

a first conductive sheet, electrically connected to the second end of the adjustment element; and

a second conductive sheet, located in the second slot and electrically connected to the metal element, wherein an orthogonal projection of the second conductive sheet on the metal element is partially overlapped with an orthogonal projection of the first conductive sheet on the metal element.

12. The antenna structure as claimed in claim 1, wherein the antenna structure is adapted to an electronic device, and the metal element of the antenna structure is constituted by a metal back cover of the electronic device.