Mobile wireless communications device comprising multi-frequency band antenna and related methods

• US 8,004,469 B2
• Filed: 03/30/2010
• Issued: 08/23/2011
• Est. Priority Date: 06/02/2004
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Qi, Yihong, Jarmuszewski, Perry, Man, Ying Tong
• Primary Examiner(s): Nguyen; Hoang V
• Application Number:
  US12/749,556
• Publication Number:
  US 20100184388A1
• Time in Patent Office: 511 Days
• Field of Search: 343/700.MS, 343/702
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• 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 5/371 Branching current paths
• 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 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
• CPC Class Codes: H04B 1/3833 Hand-held transceivers
• CPC Class Codes: Y10T 29/49016 Antenna or wave energy "plumbing" making

Abstract

A mobile wireless communications device may include a housing and a multi-frequency band antenna carried within the housing. The multi-frequency band antenna may include a main loop conductor having a gap therein defining first and second ends of the main loop conductor, a first branch conductor having a first end connected adjacent the first end of the main loop conductor and having a second end defining a first feed point, and a second branch conductor having a first end connected adjacent the second end of the main loop conductor and a second end defining a second feed point. The antenna may further include a tuning branch conductor having a first end connected to the main loop conductor between the respective first ends of the first and second branches.

Claims

1. A mobile wireless communications device comprising:

a processor and wireless transceiver circuitry coupled thereto; and

an antenna coupled to said wireless transceiver circuitry and comprising

a main loop conductor with a gap therein defining first and second ends of said main loop conductor,

a first branch conductor having a first end connected adjacent the first end of said main loop conductor and having a second end defining a first feed point coupled to said wireless transceiver circuitry,

a second branch conductor having a first end connected adjacent the second end of said main loop conductor and a second end defining a second feed point coupled to said wireless transceiver circuitry, and

a tuning branch conductor having a first end connected to said main loop conductor.

2. The mobile wireless communications device of claim 1 wherein said wireless transceiver circuitry is operable over multiple frequency bands.

3. The mobile wireless communications device of claim 2 wherein said antenna comprises a multiple frequency band antenna operable over the multiple frequency bands of said wireless transceiver circuitry.

4. The mobile wireless communications device of claim 1 wherein said processor performs at least one electronic mail function.

5. The mobile wireless communications device of claim 1 wherein said main loop conductor includes non-planar portions.

6. The mobile wireless communications device of claim 1 wherein said antenna comprises a dielectric substrate and a pattern of conductive traces thereon.

7. The mobile wireless communications device of claim 1 wherein said main loop conductor has at least one tuning feature therein.

8. The mobile wireless communications device of claim 1 wherein said first branch conductor comprises at least one tuning feature therein.

9. The mobile wireless communications device of claim 1 wherein said second branch conductor comprises at least one tuning feature therein.

10. The mobile wireless communications device of claim 1 wherein said tuning branch conductor comprises at least one tuning feature therein.

11. A mobile wireless communications device comprising:

a processor and wireless transceiver circuitry coupled thereto, said wireless transceiver circuitry operable over multiple frequency bands; and

a multiple frequency band antenna coupled to said wireless transceiver circuitry and being operable over the multiple frequency bands thereof, said multiple frequency band antenna comprising

a main loop conductor with a gap therein defining first and second ends of said main loop conductor, said main loop conductor including non-planar portions,

a first branch conductor having a first end connected adjacent the first end of said main loop conductor and having a second end defining a first feed point coupled to said wireless transceiver circuitry,

a second branch conductor having a first end connected adjacent the second end of said main loop conductor and a second end defining a second feed point coupled to said wireless transceiver circuitry, and

a tuning branch conductor having a first end connected to said main loop conductor.

12. The mobile wireless communications device of claim 11 wherein said processor performs at least one electronic mail function.

13. The mobile wireless communications device of claim 11 wherein said antenna comprises a dielectric substrate and a pattern of conductive traces thereon.

14. The mobile wireless communications device of claim 11 wherein said main loop conductor has at least one tuning feature therein.

15. The mobile wireless communications device of claim 11 wherein said first branch conductor comprises at least one tuning feature therein.

16. The mobile wireless communications device of claim 11 wherein said second branch conductor comprises at least one tuning feature therein.

17. The mobile wireless communications device of claim 11 wherein said tuning branch conductor comprises at least one tuning feature therein.

18. A method for making a mobile wireless communications device comprising:

providing a processor and wireless transceiver circuitry coupled thereto; and

forming and coupling an antenna to the wireless transceiver circuitry, the antenna comprising

a main loop conductor with a gap therein defining first and second ends of the main loop conductor,

a first branch conductor having a first end connected adjacent the first end of the main loop conductor and having a second end defining a first feed point to be coupled to the wireless transceiver circuitry,

a second branch conductor having a first end connected adjacent the second end of the main loop conductor and a second end defining a second feed point to be coupled to the wireless transceiver circuitry, and

a tuning branch conductor having a first end connected to the main loop conductor.

19. The method of claim 18 wherein the wireless transceiver circuitry is operable over multiple frequency bands.

20. The method of claim 19 wherein the antenna comprises a multiple frequency band antenna operable over the multiple frequency bands of the wireless transceiver circuitry.

21. The method of claim 18 wherein the processor performs at least one electronic mail function.

22. The method of claim 18 wherein the main loop conductor includes non-planar portions.

23. The method of claim 18 wherein the antenna comprises a dielectric substrate and a pattern of conductive traces thereon.