Reconfigurable antenna for multiband operation

• US 6,836,249 B2
• Filed: 10/22/2002
• Issued: 12/28/2004
• Est. Priority Date: 10/22/2002
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Pulimi, Narendra, Kenoun, Robert
• Primary Examiner(s): Chen, Shih-Chao
• Application Number:
  US10/277,593
• Publication Number:
  US 20040075611A1
• Time in Patent Office: 798 Days
• Field of Search: 343/700.MS, 343/702, 343/745, 343/829, 343/846, 343/850
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• 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 9/26 with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength resonant loop antennas H01Q7/00
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00

Abstract

An antenna assembly for a mobile communication device. The antenna assembly can include a RF connection feed point and a planar radiating element including a conductive area split by a nonconductive gap which divides the planar radiating element into a first arm having an end coupled to the RF connection feed point and a second arm having an end coupled to the RF connection feed point. The antenna assembly can also include a first connection point coupled to the opposite end of the first arm from the RF connection feed point, the first connection point being selectively coupled to an impedance.

Claims

1. An antenna assembly for a mobile communication device, comprising:

a RF connection feed point;

a first arm having an end coupled to the RF connection feed point;

a second arm having an end coupled to the RF connection feed point; and

tuning circuitry selectively coupled to the opposite end of the first arm from the RF connection point.

2. The antenna assembly according to claim 1, wherein the tuning circuitry comprises a first connection point coupled to a ground.

3. The antenna assembly according to claim 1, wherein the tuning circuitry comprises an impedance.

4. The antenna assembly according to claim 1, further comprising:

means for selectively eliminating the effects of the second arm on the antenna assembly.

5. The antenna assembly according to claim 4, wherein the means for selectively eliminating comprises an impedance coupled to the opposite end of the second arm from the RF connection point.

6. The antenna assembly according to claim 4, wherein the means for selectively eliminating comprises a second connection point coupled to the opposite end of the second arm from the RF connection point, the second connection point being selectively coupled to a ground.

7. The antenna assembly according to claim 1, further comprising:

a connection leg in close proximity to the RF connection feed point, the connection leg being selectively coupled to a ground.

8. The antenna assembly according to claim 1, wherein the second arm is longer than the first arm.

9. The antenna assembly according to claim 1, wherein the first arm is longer than the second arm.

10. The antenna assembly according to claim 1, wherein the first arm includes a section folded substantially perpendicular to the first arm along a length of the first arm.

11. The antenna assembly according to claim 1,

wherein the first arm includes a section folded substantially perpendicular to the first arm at the end of the first arm, and

wherein the tuning circuitry is coupled to the section folded substantially perpendicular to the first arm.

12. The antenna assembly according to claim 1, wherein the second arm includes a section folded substantially perpendicular to the second arm at the end of the second arm.

13. The antenna assembly according to claim 1, wherein the first arm resonates in the same band as the second arm.

14. A planar inverted-F antenna comprising:

a RF connection feed point;

a short arm having an end coupled to the RF connection feed point;

a long arm having an end coupled to the RF connection feed point; and

tuning circuitry selectively coupled to a distal end on the planar inverted-F antenna from the RF connection feed point.

15. The planar inverted-F antenna according to claim 14, further comprising a first ground connection point in close proximity to the RF connection feed point, the ground connection point selectively coupled to a ground.

16. The planar inverted-F antenna according to claim 14, wherein the tuning circuitry is coupled to an opposite end of the short arm from the RF connection feed point.

17. The planar inverted-F antenna according to claim 14, wherein the tuning circuitry is coupled to an opposite end of the long arm from the RF connection feed point.

18. The planar inverted-F antenna according to claim 14, wherein the tuning circuitry comprises a ground connection point.

19. The planar inverted-F antenna according to claim 14, wherein the tuning circuitry comprises an impedance.

20. The antenna assembly according to claim 14, wherein the short arm includes a section folded perpendicular to the short arm along the length of the short arm.

21. An antenna assembly for a mobile communication device, comprising:

a RF connection feed point;

a planar radiating element including

a conductive area split by a nonconductive gap which divides the planar radiating element into

a first arm having an end coupled to the RF connection feed point, and

a second arm having an end coupled to the RF connection feed point; and

a first connection point coupled to the opposite end of the first arm from the RF connection feed point, the first connection point being selectively coupled to a ground.

22. The antenna assembly according to claim 21, wherein the first arm includes a section folded substantially perpendicular to the first arm along the length of the first arm.

23. The antenna assembly according to claim 21, wherein the second arm includes a section folded perpendicular to the second arm along the length of the second arm.