Metal inverted F antenna

• US 7,365,689 B2
• Filed: 06/23/2006
• Issued: 04/29/2008
• Est. Priority Date: 06/23/2006
• Status: Expired due to Fees

• Current Assignee: Arcadyan Technology Corporation (Compal Electronics Incorporated)
• Original Assignee: Arcadyan Technology Corporation (Compal Electronics Incorporated)
• Inventors: Lee, Chang-Jung
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US11/473,268
• Publication Number:
  US 20070296636A1
• Time in Patent Office: 676 Days
• Field of Search: 343/702, 343/700.MS, 343/829, 343/846
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• 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 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

The present invention discloses an antenna structure comprising a ground plane; a radiator having a curved shape portion and a rectangular portion connected to the ground plane via a first end of the curved shape portion and grounded by a ground point of the ground plane, the rectangular portion being connected to a second end of the curved shape portion; and a feed point projected into a groove within the ground plane and connected to the second end of the curved shape portion of the radiator; and wherein the ground plane is extended over the rectangular portion of the radiator.

Claims

1. An antenna structure comprising:

a ground plane;

a radiator having a curved shape portion and a rectangular portion connected to said ground plane via a first end of said curved shape portion and grounded by a ground point of said ground plane, said rectangular portion being connected to a second end of said curved shape portion; and

a feed point projected into a groove within said ground plane and connected to said second end of said curved shape portion of said radiator; and

wherein said ground plane is extended over said rectangular portion of said radiator.

2. The antenna structure of claim 1, wherein said rectangular portion of said radiator is parallel to said ground plane.

3. The antenna structure of claim 1, wherein the thickness of said antenna structure is from 0.3 millimeter to 2 millimeter.

4. The antenna structure of claim 1, wherein the length of said rectangular portion of said radiator is about ¼

wavelength.

5. The antenna structure of claim 1, wherein the width of said rectangular portion of said radiator is from 1/20 to 1/50 wavelength.

6. The antenna structure of claim 1, wherein the radius of the outermost circle of said curved shape portion of said radiator is about 1/16 wavelength.

7. The antenna structure of claim 1, wherein the radius of the center hollow circle of said curved shape portion of said radiator is about 1/16 wavelength subtracting the width of said rectangular portion of said radiator.

8. The antenna structure of claim 1, wherein the height of said ground plane is greater than the radius of said groove.

9. The antenna structure of claim 1, wherein said curved shape portion is in the shape of a circle intersecting the ground plane.

10. The antenna structure of claim 1, wherein the groove has a cross section in the shape of a truncated circle, the groove having an opening on the ground plane which is smaller than a diameter of the groove.

11. The antenna structure of claim 1, wherein the radiator has a groove at an interface between the curved shape portion and the rectangular portion.

12. The antenna structure of claim 1, wherein said feed point projects into said groove and does not contact an inside surface of said groove.

13. An antenna structure comprising:

a ground plane;

a radiator having a curved shape portion and a rectangular portion connected to said ground plane via a first end of said curved shape portion and grounded by a ground point of said ground plane, said rectangular portion being connected to a second end of said curved shape portion; and

a feed point projected into a groove within said ground plane and connected to said second end of said curved shape portion of said radiator; and

wherein said ground plane is extended over said rectangular portion of said radiator; and

wherein the radius of said groove is greater than the width of said rectangular portion of said radiator.

14. An antenna structure comprising:

a ground plane;

a radiator having a curved shape portion and a rectangular portion connected to said ground plane via a first end of said curved shape portion and grounded by a ground point of said ground plane, said rectangular portion being connected to a second end of said curved shape portion; and

a feed point projected into a groove within said ground plane and connected to said second end of said curved shape portion of said radiator; and

wherein said ground plane is extended over said rectangular portion of said radiator; and

wherein the length from one end, connected to said first end of said curved shape portion, to said groove is greater than the radius of the outermost circle of said curved shape portion of said radiator.