Claims
- 1. A communication device in a radio communication system, the device comprising:a first interface for receiving information from a user; a second interface for transmitting information to said user; and a built-in multiple band antenna comprising a first part and a second part, said first part being tuned to at least a first frequency band and a second frequency band; wherein said second part is tuned to at least a third frequency band when electro-magnetically interacting with said first part.
- 2. The communication device according to claim 1, wherein:said first interface contains one or more of a group consisting of a microphone, a keypad, a touchpad, a radio-port, an IR-port, a computer-port and a Bluetooth-port; and said second interface contains one or more of a group consisting of a speaker, a display, a radio-port, a computer-port, and a Bluetooth-port.
- 3. The communication device according to claim 1, wherein said second part is galvanically separated from said first part.
- 4. The communication device according to claim 1, wherein said first part has a first ground pin connected to a ground plane and to a feeding pin of the device.
- 5. The communication device according to claim 4, wherein said second part has a second ground pin connected to the ground plane and to a main element with an open end.
- 6. The communication device according to claim 1, wherein said first part is folded to form a first element and a second element, said first element comprising a first ground pin and a feeding pin, and said second element comprising a second ground pin and an open end.
- 7. The communication device according to claim 6, wherein the second element is folded at least 90 degrees in relation to a longitudinal axis of the first element.
- 8. The communication device according to claim 6, wherein the second element is folded approximately 180 degrees in relation to a longitudinal axis of the first element.
- 9. The communication device according to claim 6, wherein said first element of said first part, said second element of said first part, and said main element of said second part, are spaced apart and electrically separated from said ground plane by one of a group consisting of a dielectric substrate, legs, a plastic substrate and a ceramic substrate.
- 10. The communication device according to claim 6 wherein said main element of the second part is arranged in close vicinity of, and in parallel with, the first element of the first part.
- 11. The communication device according to claim 6, wherein said second ground pin of the second part is placed in close vicinity of the feeding pin of the first part.
- 12. The communication device according to claim 6, wherein said open end of the second element is bent down towards the ground plane to increase an electrical length of the second element without affecting its physical width W.
- 13. The communication device according to claim 6, wherein said open end of the main element is bent down towards the ground plane to increase an electrical length of the main element without affecting its physical width W.
- 14. The communication device according to claim 6 wherein a slot between the first and the second elements of the first part has a width of between approximately 1 to 3 mm.
- 15. The communication device according to claim 6 wherein the first and the second elements of the first part, and the second part have different lengths and widths to achieve an arbitrary tuning to a specific frequency.
- 16. The communication device according to claim 6 further comprising:a substrate of a predetermined thickness, onto which said first part and second part are mounted; wherein said substrate is mounted on a PCB comprising said ground plane.
- 17. The communication device according to claim 16, wherein said substrate is a ceramic substrate or a plastic substrate.
- 18. The communication device according to claim 1 wherein said second part is arranged in close vicinity of, and in parallel with, the first part.
- 19. The communication device according to claim 1, wherein said first frequency band corresponds to GSM, said second frequency band corresponds to DCS and said third frequency band corresponds to PCS.
- 20. The communication device according to claim 1, wherein the built-in multiple band antenna has a length of approximately 20 mm, a width of approximately 45 mm and a height over ground of approximately 8 mm.
- 21. The communication device according to claim 1, wherein said built-in multiple band antenna is attached to a back cover of said communication device.
- 22. A built-in antenna for a radio communication device, comprising:a first part tuned to at least a first frequency band and a second frequency band; and a second part disposed to electro-magnetically interact with said first part, said second part being tuned to at least a third frequency band when electromagnetically interacting with said first part.
- 23. The built-in antenna according to claim 22, wherein said second part is galvanically separated from said first part.
- 24. The built-in antenna according to claim 22, wherein said first part comprises a first ground pin and a feeding pin, the first ground pin being disposed to connect to a ground plane and the feeding pin being disposed to connect to a transmitter/receiver.
- 25. The built-in antenna according to claim 24, wherein said second part comprises a second ground pin and a main element, the second ground pin being disposed to connect to the ground plane, and the main element having an open end.
- 26. The built-in antenna according to claim 22, wherein said first part is folded to form a first element and a second element, said first element comprising a first ground pin and a feeding pin, and said second element comprising a second ground pin and an open end.
- 27. The built-in antenna according to claim 26, wherein the second element is folded at least 90 degrees in relation to a longitudinal axis of the first element.
- 28. The built-in antenna according to claim 26, wherein the second element is folded approximately 180 degrees in relation to a longitudinal axis of the first element.
- 29. The built-in antenna according to claim 26, wherein the first element of said first part, said second element of said first part, and the main element of said second part, are spaced apart and electrically separated from said ground plane by one of a group consisting of a dielectric substrate, legs, a plastic substrate and a ceramic substrate.
- 30. The built-in antenna according to claim 26, wherein said main element of the second part is arranged in close vicinity of, and in parallel with, the first element of the first part.
- 31. The built-in antenna according to claim 26, wherein said second ground pin is placed in close vicinity of the feeding pin of the first part.
- 32. The built-in antenna according to claim 26, wherein said open end of the second element is bent down towards the ground plane to increase an electrical length of the second element without affecting its physical width W.
- 33. The built-in antenna according to claim 26, wherein said open end of the main element is bent down towards the ground plane to increase an electrical length of the main element without affecting its physical width W.
- 34. The built-in antenna according to claim 26, wherein a slot between the first and the second element of the first part has a width of approximately 1 to 3 mm.
- 35. The built-in antenna according to claim 26, wherein the first and the second elements of the first part, and the second part have different lengths and widths to achieve an arbitrary tuning to a specific frequency.
- 36. The built-in antenna according to claim 26, further comprising:a substrate with a predetermined thickness, onto which said first part and second part are mounted; wherein said substrate is mounted on a PCB comprising said ground plane.
- 37. The built-in antenna according to claim 36 wherein said substrate is a ceramic substrate or a plastic substrate.
- 38. The built-in antenna according to claim 36, wherein said PCB comprising the substrate is mounted on a chassis inside a radio communication device.
- 39. The built-in antenna according to claim 22, wherein said second part is arranged in close vicinity of, and in parallel with, the first part.
- 40. The built-in antenna according to claim 22, wherein said first frequency band corresponds to GSM, said second frequency band corresponds to DCS and said third frequency band corresponds to PCS.
- 41. The built-in antenna according to claim 22, wherein the built-in multiple band antenna has a length of approximately 20 mm, a width of approximately 45 mm and a height over ground plane of approximately 8 mm.
- 42. The built-in antenna according to claim 22, wherein said built-in antenna has an arbitrary two or three-dimensional shape.
- 43. The built-in antenna according to claim 22, wherein the first part has a length corresponding to the first frequency band within which it is made resonant, and to the second frequency band within which it is made resonant, said second frequency band being approximately twice as high as said first frequency band.
- 44. The built-in antenna according to claim 22, wherein the second part has a length corresponding to approximately ¼ wavelength of the third frequency to which it is made resonant.
- 45. The built-in antenna according to claim 22, wherein said antenna is attached to a back cover of a mobile communication device.
Priority Claims (1)
Number |
Date |
Country |
Kind |
0002839 |
Aug 2000 |
SE |
|
RELATED APPLICATIONS
This application claims priority under 35 U.S.C. §§119 and/or 365 to 0002839-9 filed in SWEDEN on Aug. 7, 2000; the entire content of which is hereby incorporated by reference. This application also claims priority under 35 U.S.C. §§119 and/or 365 to U.S. Provisional Application No. 60/226,087, filed Aug. 18, 2000.
US Referenced Citations (8)
Foreign Referenced Citations (8)
Number |
Date |
Country |
1024552 |
Aug 2000 |
EP |
2800920 |
May 2001 |
FR |
6-37531 |
Oct 1994 |
JP |
7131234 |
May 1995 |
JP |
1093332 |
Apr 1998 |
JP |
WO9627219 |
Sep 1996 |
WO |
WO9844588 |
Oct 1998 |
WO |
WO9903168 |
Jan 1999 |
WO |
Non-Patent Literature Citations (2)
Entry |
Rowell, Corbett R. et al.: “A Compact PIFA Suitable for Dual-Frequency 900/1800-MHZ Operation”, IEEE transactions on antennas and propagation, Apr. 1998, vol. 46, No. 4, pp. 596-598. |
K. Qassim, “Inverted-F Antenna for Portable Handsets”, IEE Colloquium on Microwave Filters and Antenna for Personal Communication Systems, pp. 3/1-3/6, Feb. 1994, London, UK. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/226087 |
Aug 2000 |
US |