Claims
- 1. A dipole antenna for a mobile communication device comprising:a) a planar dielectric substrate having first and second opposing surfaces and oriented generally perpendicularly to a ground plane disposed within a housing of the mobile communication device; b) a first radiating element on said first opposing surface of said dielectric substrate; c) a second radiating element on said second opposing surface of said dielectric substrate; and d) wherein said first and second radiating elements each include a bowtie element disposed in a central portion of the dielectric substrate.
- 2. The dipole antenna of claim 1 wherein said first and second radiating elements further include meander elements extending in opposite directions along a longitudinal axis of said dielectric substrate from said bowtie elements.
- 3. The dipole antenna of claim 1 wherein each said radiating element includes a meander element extending along a longitudinal axis of said dielectric substrate from a center portion of the dielectric substrate towards an end of said dielectric substrate.
- 4. The dipole antenna according to claim 3 wherein said meander elements include one or more oscillations that oscillate about said longitudinal axis.
- 5. The dipole antenna according to claim 4 wherein said oscillations are generally rectangular in form.
- 6. The dipole antenna of claim 3 wherein said meander elements are non-uniform.
- 7. The dipole antenna according to claim 6 wherein the meander element includes a plurality of meander segments of varying width.
- 8. The dipole antenna according to claim 7 wherein the meander elements include a first meander segment disposed below said longitudinal axis and a second meander segment disposed above said longitudinal axis, and wherein said first meander segment is wider than said second meander segment.
- 9. The dipole antenna according to claim 6 wherein said meander elements include a plurality of oscillations, and wherein said oscillations vary in shape.
- 10. The dipole antenna according to claim 6 wherein said meander elements include a plurality of oscillations, and wherein said oscillations are unevenly spaced along the length of said meander elements.
- 11. The dipole antenna of claim 1 wherein the longitudinal axis of the radiating elements is parallel to said ground plane.
- 12. The dipole antenna according to claim 1 wherein said radiating elements are asymmetrical.
- 13. The dipole antenna according to claim 1 wherein said first and second radiating elements are of different electrical lengths.
- 14. The dipole antenna according to claim 1 wherein said antenna resonates in at least two frequency bands.
- 15. The dipole antenna according to claim 1 further including at least one parasitic tuning element disposed generally parallel to said dielectric substrate.
- 16. The dipole antenna according to claim 15 wherein said parasitic tuning element comprises a planar conductive element in parallel spaced relation to said dielectric substrate.
- 17. The dipole antenna according to claim 16 wherein said parasitic tuning element is spaced from said ground plane.
- 18. The dipole antenna according to claim 16 wherein said parasitic tuning element is electrically connected to said ground plane.
- 19. A mobile communications terminal comprising:a) a radio communications circuit; b) a ground plane operatively coupled to said radio communications circuit; c) a dipole antenna comprising first and second radiating elements operatively coupled to said radio communications circuit for receipt and transmission of radio signals, said first and second radiating elements each comprising a bowtie element, said antenna oriented generally perpendicular to said ground plane; and d) wherein said first and second radiating elements are disposed on opposite sides of a dielectric substrate.
- 20. The mobile communication device of claim 19 wherein each of said bowtie elements is disposed in a central portion of the dielectric substrate.
- 21. The mobile communication device of claim 20 wherein said first and second radiating elements further include meander elements extending in opposite directions along a longitudinal axis of said dielectric substrate from said bowtie elements.
- 22. The mobile communication device of claim 19 wherein each said radiating element includes a meander element extending along a longitudinal axis of said dielectric substrate from a center portion of the dielectric substrate towards an end of said dielectric substrate.
- 23. The mobile communication device according to claim 22 wherein said meander elements include one or more oscillations that oscillate about said longitudinal axis.
- 24. The mobile communication device according to claim 23 wherein said oscillations are generally rectangular in form.
- 25. The mobile communication device of claim 22 wherein said meander elements are non-uniform.
- 26. The mobile communication device according to claim 25 wherein the meander element includes a plurality of meander segments of varying width.
- 27. The mobile communication device according to claim 26 wherein the meander elements include a first meander segment disposed below said longitudinal axis and a second meander segment disposed above said longitudinal axis, and wherein said first meander segment is wider than said second meander segment.
- 28. The mobile communication device according to claim 25 wherein said meander elements include a plurality of oscillations, and wherein said oscillations vary in shape.
- 29. The mobile communication device according to claim 25 wherein said meander elements include a plurality of oscillations, and wherein said oscillations are unevenly spaced along the length of said meander elements.
- 30. The mobile communications terminal according to claim 19 wherein the longitudinal axis of the radiating elements is parallel to said ground plane.
- 31. The mobile communication device according to claim 19 wherein said radiating elements are asymmetrical.
- 32. The mobile communication device according to claim 19 wherein said first and second radiating elements are of different electrical lengths.
- 33. The mobile communication device according to claim 19 wherein said antenna resonates in at least two frequency bands.
- 34. The mobile communications device according to claim 19 further including a parasitic tuning element.
- 35. The mobile communications device according to claim 34 wherein said tuning element is at least one planar conductor positioned perpendicular to said ground plane.
- 36. The mobile communication device according to claim 35 wherein said planar conductor is spaced from said ground plane.
- 37. The mobile communications device of claim 35 wherein said planar conductor is electrically connected to said ground plane.
- 38. The mobile communications device of claim 19 further including a circuit board containing said radio communications circuits.
- 39. The mobile communications device of claim 38 wherein said ground plane is disposed perpendicular to said circuit board.
- 40. The mobile communications device of claim 38 wherein said circuit board contains said ground plane.
Parent Case Info
This application is a continuation of Application Ser. No. 09/377,019, filed Aug. 18, 1999, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0642189 |
Mar 1995 |
EP |
0757405 |
Feb 1997 |
EP |
2325091 |
Nov 1998 |
GB |
60240201 |
Nov 1985 |
JP |
WO8502719 |
Jun 1985 |
WO |
Non-Patent Literature Citations (1)
Entry |
Nesic, Aleksander; Radnovic, Ivana; Brankovic, Veselin; “Ultrawideband Printed Antenna Array for 60 GHz Frequency Range,” IEEE, 1997, pp. 1272-1275. |
Continuations (1)
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Number |
Date |
Country |
Parent |
09/377019 |
Aug 1999 |
US |
Child |
09/766166 |
|
US |