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

• US 7,696,935 B2
• Filed: 07/15/2008
• Issued: 04/13/2010
• Est. Priority Date: 06/02/2004
• Status: Expired due to Fees

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Blackberry Limited
• Inventors: Qi, Yihong, Jarmuszewski, Perry, Man, Ying Tong
• Primary Examiner(s): Nguyen; Hoang V
• Application Number:
  US12/173,087
• Publication Number:
  US 20080272966A1
• Time in Patent Office: 637 Days
• Field of Search: 343/700.MD, 343/702, 343/846, 343/745, 343/895
• US Class Current: 343/702
• 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:

at least one dielectric substrate;

wireless transceiver circuitry carried by said at least one dielectric substrate; and

an antenna comprising conductive traces carried by said at least one dielectric substrate and defining

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 main loop conductor includes non-planar portions.

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

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

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

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

7. A mobile wireless communications device comprising:

at least one dielectric substrate;

wireless transceiver circuitry carried by said at least one dielectric substrate; and

an antenna comprising conductive traces carried by said at least one dielectric substrate and defining

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,

at least one of said first, second, and tuning branch conductors comprising a tuning feature therein.

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

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

providing at least one dielectric substrate carrying wireless transceiver circuitry thereon; and

forming an antenna comprising conductive traces carried by the at least one dielectric substrate and defining

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 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 coupled to the wireless transceiver circuitry, and

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

10. The method of claim 9 wherein the main loop conductor includes non-planar portions.

11. The method of claim 9 wherein the main loop conductor comprises at least one tuning feature therein.

12. The method of claim 9 wherein the first branch conductor comprises at least one tuning feature therein.

13. The method of claim 9 wherein the second branch conductor comprises at least one tuning feature therein.

14. The method of claim 9 wherein the tuning branch conductor comprises at least one tuning feature therein.