Antenna with near-field radiation control
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.
1. A flexible substrate configured for use as an antenna in a wireless mobile communication device, the substrate having a first feeding point and a second feeding point for connection to a transceiver in the wireless mobile communication device, the substrate 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 substrate of claim 1 wherein the parasitic element includes a sawtooth-shaped conductor section.
3. The substrate of claim 1 wherein the parasitic element is positioned substantially parallel to the linear section of the first conductor section.
4. The substrate 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 substrate 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 substrate 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 substrate 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 substrate of claim 7 wherein the parasitic element connection section attaches at one end of the parasitic element connection section.
9. The substrate of claim 7 wherein the parasitic element connection section attaches substantially intermediate between the two ends of the parasitic element connection section.
10. The substrate 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 substrate 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 substrate 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 substrate 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 substrate of claim 10 wherein the parasitic element includes a parasitic element conductor section that is positioned adjacent to the first arm.
15. The substrate of claim 10 wherein the parasitic element includes a parasitic element conductor section that is positioned adjacent to the second arm.
16. The substrate of claim 1 wherein the diffuser comprises a first diffuser section and a second diffuser section.
17. The substrate of claim 16 wherein the first and second diffuser sections have a triangular shape.
18. The substrate of claim 16 wherein the first and second diffuser sections have a curved shape.
19. The substrate 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 substrate 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 substrate of claim 20 wherein the first and second diffuser sections have a triangular shape.
22. The substrate of claim 20 wherein the first and second diffuser sections have a curved shape.
23. The substrate 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 flexible substrate configured for use as an antenna in a wireless mobile communication device, the substrate having a first feeding point and a second feeding point for connection to a transceiver in the wireless mobile communication device, the substrate 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 substrate of claim 24 wherein the diffuser comprises a first diffuser section and a second diffuser section.
26. The substrate of claim 25 wherein the first and second diffuser sections have a triangular shape.
27. The substrate of claim 25 wherein the first and second diffuser sections have a curved shape.
28. The substrate 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 substrate 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 substrate of claim 29 wherein the first and second diffuser sections have a triangular shape.
31. The substrate of claim 29 wherein the first and second diffuser sections have a curved shape.
32. The substrate 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.