Antenna sub-assembly for electronic device

• US 8,193,993 B2
• Filed: 05/11/2009
• Issued: 06/05/2012
• Est. Priority Date: 11/20/2006
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Maddaleno, Marco
• Primary Examiner(s): Ho, Tan
• Application Number:
  US12/463,603
• Publication Number:
  US 20090224987A1
• Time in Patent Office: 1,121 Days
• Field of Search: 343/700.MS, 343/702
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 13/16 Folded slot antennas
• 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

A portable electronic device (100) having an antenna sub-assembly (204) including a conductor with a first portion (216) along a first surface of a circuit board, a second portion (218) connected to the first portion along an edge of the circuit board, and a third portion (220) connected to the second portion. The third portion is along a second surface of the circuit board. A feed leg (222) couples to the conductor to radio circuitry.

Claims

1. A portable electronic device comprising:

radio circuitry disposed on a circuit board, the circuit board having first and second surface on opposite sides of the circuit board and an edge extending between the first and second surfaces;

an antenna sub-assembly including a conductor coupled to the radio circuitry by a feed leg coupled,

the conductor including a first portion disposed along the first surface of the circuit board, a third portion disposed along the second surface of the circuit board, and a second portion disposed along the edge of the circuit board, wherein the second portion is connected to the first portion, and the second portion portion of the conductor is spaced apart from the edge of the circuit board such that the second portion remains apart from a conductive portion of the circuit board.

2. The device of claim 1,

the first portion includes opposite ends,

the second portion includes first and second portions extending from the opposite ends of the first portion and disposed along the edge of the circuit board,

the third portion includes first and second portions coupled to a corresponding one of the first and second portions extending from the opposite ends of the first portion.

3. The device of claim 2, the first and third portions have a serpentine shape.

4. The device of claim 1, wherein the second portion is substantially perpendicular to the first portion.

5. The device of claim 1, wherein the third portion is substantially parallel to the first portion.

6. The device of claim 1 further comprising a ground leg grounding the conductor to a ground on the circuit board.

7. The device of claim 1, the antenna sub-assembly is selected from a group comprising:

a Folded Inverted Conformal Antenna (FICA) sub-assembly;

a Planar Inverted-F Antenna (PIFA) sub-assembly;

an Inverted-F Antenna (IFA) sub-assembly;

a Folded-J Antenna (FJA) sub-assembly;

a monopole antenna sub-assembly; and

a loop antenna sub-assembly.

8. The device of claim 1, the conductor including a slot through a portion thereof.

9. An electronic device comprising:

a circuit board comprising a first surface, a second surface, and at least one edge, the second surface is substantially parallel to the first surface, the at least one edge extending between the first surface and the second surface; and

an antenna sub-assembly electrically coupled to the circuit board, the antenna sub-assembly comprising a radiating conductor element wrapped about the first and second surfaces of the circuit board, wherein at least one portion of the antenna sub-assembly extends along the at least one edge of the circuit board, while configured to be spaced apart from the same edge of the circuit board such that the at least one portion of the antenna sub-assembly remains apart from a conductive portion of the circuit board.

10. The device of claim 9, the radiating conductor element including a first portion adjacent the first surface of the circuit board and a third portion adjacent the second surface of the circuit board, the first and third portions are substantially parallel.

11. The device of claim 10, the first and second portions have a serpentine shape.

12. The device of claim 9, the radiating conductor element including a second portion interconnecting the first and third portions, the second portion substantially perpendicular to the first and third portions.

13. The device of claim 9, the radiating conductor element including comprises at least one slot through a portion thereof.

14. The device of claim 9 further comprising a feed leg connecting the radiating conductor element to the circuit board.

15. The device of claim 9 further comprising a ground leg connected to the at least one conductor, wherein the ground leg provides a conductive path for grounding the at least one conductor.

16. The device of claim 9, the antenna sub-assembly is selected from a group comprising:

a Folded Inverted Conformal Antenna (FICA) sub-assembly;

a Planar Inverted-F Antenna (PIFA) sub-assembly;

an Inverted-F Antenna (IFA) sub-assembly;

a Folded-J Antenna (FJA) sub-assembly;

a monopole antenna sub-assembly; and

a loop antenna sub-assembly.