Antenna with near-field radiation control

• US 8,223,078 B2
• Filed: 01/25/2012
• Issued: 07/17/2012
• Est. Priority Date: 12/12/2002
• Status: Expired due to Term

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Qi, Yihong, Jarmuszewski, Perry, Stevenson, Adam D.
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US13/358,126
• Publication Number:
  US 20120119967A1
• Time in Patent Office: 174 Days
• Field of Search: 343/702, 343/795, 343/803, 343/818, 343/833
• 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 19/005 Patch antenna using one or more coplanar parasitic elements
• 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

Abstract

An antenna and a wireless mobile communication device incorporating the antenna are provided. The antenna includes a first conductor section electrically coupled to a first feeding point, a second conductor section electrically coupled to a second feeding point, and a near-field radiation control structure adapted to control characteristics of near-field radiation generated by the antenna. Near-field radiation control structures include a parasitic element positioned adjacent the first conductor section and configured to control characteristics of near-field radiation generated by the first conductor section, and a diffuser in the second conductor section configured to diffuse near-field radiation generated by the second conductor section into a plurality of directions.

Claims

1. A wireless mobile communication device comprising:

a transmitter;

a receiver; and

an antenna having a first feeding point and a second feeding point connected to the transmitter and the receiver, the antenna comprising;

a first conductor section connected to the first feeding point;

a second conductor section connected to the second feeding point;

a parasitic element positioned adjacent to a linear section of the first conductor section; and

a diffuser coupled between linear sections of the second conductor section.

2. The wireless mobile communication device of claim 1 wherein the parasitic element includes a sawtooth-shaped conductor section.

3. The wireless mobile communication device of claim 1 wherein the parasitic element is positioned substantially parallel to the linear section of the first conductor section.

4. The wireless mobile communication device of claim 1 wherein the first conductor section has a first arm and a second arm, and wherein the parasitic element is positioned substantially parallel to linear sections of both of the first arm and the second arm.

5. The wireless mobile communication device of claim 1 wherein the parasitic element includes a parasitic element connection section that electrically couples the parasitic element to the first conductor section.

6. The wireless mobile communication device of claim 5 wherein the parasitic element connection section is substantially perpendicular to a portion of the first conductor section at which the parasitic element connection section attaches.

7. The wireless mobile communication device of claim 6 wherein the parasitic element includes a parasitic element conductor section that is substantially parallel to the portion of the first conductor section at which the parasitic element connection section attaches.

8. The wireless mobile communication device of claim 7 wherein the parasitic element connection section attaches at one end of the parasitic element connection section.

9. The wireless mobile communication device of claim 7 wherein the parasitic element connection section attaches substantially intermediate between the two ends of the parasitic element connection section.

10. The wireless mobile communication device of claim 1 wherein the first conductor section includes a first arm electrically coupled to the first feeding point and a second arm electrically coupled to the first arm.

11. The wireless mobile communication device of claim 10 wherein at least a portion of the first arm is substantially parallel to at least a portion of the second arm.

12. The wireless mobile communication device of claim 11 wherein the parasitic element includes a parasitic element conductor section that is substantially parallel to the portion of the first arm that is substantially parallel to a portion of the second arm.

13. The wireless mobile communication device of claim 10 wherein the parasitic element includes a parasitic element conductor section that is positioned between the first arm and the second arm.

14. The wireless mobile communication device of claim 10 wherein the parasitic element includes a parasitic element conductor section that is positioned adjacent to the first arm.

15. The wireless mobile communication device of claim 10 wherein the parasitic element includes a parasitic element conductor section that is positioned adjacent to the second arm.

16. The wireless mobile communication device of claim 1 wherein the diffuser comprises a first diffuser section and a second diffuser section.

17. The wireless mobile communication device of claim 16 wherein the first and second diffuser sections have a triangular shape.

18. The wireless mobile communication device of claim 16 wherein the first and second diffuser sections have a curved shape.

19. The wireless mobile communication device of claim 1 wherein the second conductor section includes a first arm electrically coupled to the second feeding point and a second arm electrically coupled to the first arm.

20. The wireless mobile communication device of claim 19 wherein the first arm is electrically coupled to a first diffuser section and the second arm is electrically coupled to a second diffuser section.

21. The wireless mobile communication device of claim 20 wherein the first and second diffuser sections have a triangular shape.

22. The wireless mobile communication device of claim 20 wherein the first and second diffuser sections have a curved shape.

23. The wireless mobile communication device of claim 1 wherein the first conductor section and the second conductor section are positioned to define a gap there between and form an open folded dipole antenna.

24. A wireless mobile communication device comprising:

a transmitter;

a receiver; and

an antenna having a first feeding point and a second feeding point connected to the transmitter and the receiver, the antenna comprising;

a first conductor section connected to the first feeding point;

a second conductor section connected to the second feeding point; and

a diffuser coupled between linear sections of the second conductor section.

25. The wireless mobile communication device of claim 24 wherein the diffuser comprises a first diffuser section and a second diffuser section.

26. The wireless mobile communication device of claim 25 wherein the first and second diffuser sections have a triangular shape.

27. The wireless mobile communication device of claim 25 wherein the first and second diffuser sections have a curved shape.

28. The wireless mobile communication device of claim 24 wherein the second conductor section includes a first arm electrically coupled to the second feeding point and a second arm electrically coupled to the first arm.

29. The wireless mobile communication device of claim 28 wherein the first arm is electrically coupled to a first diffuser section and the second arm is electrically coupled to a second diffuser section.

30. The wireless mobile communication device of claim 29 wherein the first and second diffuser sections have a triangular shape.

31. The wireless mobile communication device of claim 29 wherein the first and second diffuser sections have a curved shape.

32. The wireless mobile communication device of claim 24 wherein the first conductor section and the second conductor section are positioned to define a gap there between and form an open folded dipole antenna.