Claims
- 1. A multi frequency band antenna comprisinga low band portion tuned to a low frequency band, and a first high band portion tuned to a first high frequency band at higher frequencies than the low frequency band, where the low band portion and the first high band portion have a common first grounding point, a common feeding point for feeding input signals to the antenna and for outputting signals from the antenna, and a first conductor portion forming part of the low band portion and of the first high band portion, the first conductor portion being electrically connected to the first grounding point and to the common feeding point, characterized in that a second high band portion is coupled to the first conductor portion and tuned to a second high frequency band at a higher frequency than the low-frequency band and different from the first high frequency band.
- 2. An antenna according to claim 1, characterized in that the second high band portion includes a second conductor portion capacitively coupled to the first conductor portion.
- 3. An antenna according to claim 1, wherein each of first conductor portion and the second conductor portion includes substantially linear portion.
- 4. An antenna according to claim 3, characterized in that the second conductor portion is arranged substantially parallel to the first conductor portion.
- 5. An antenna according to claim 4, characterized in that the second conductor portion is arranged substantially parallel to the first conductor portion over a length corresponding to one quarter of a wavelength of a frequency in the second high frequency band.
- 6. An antenna according to claim 1, characterized in that each of the low band portion and the first high band portion is configured substantially in a spiral form and each branches off from the substantially linear first conductor portion at a first side of the first conductor portion.
- 7. An antenna according to claim 6 characterized in that the second high band portion is arranged at a second side opposite the first side of the first conductor portion.
- 8. An antenna according to claim 6, characterized in that each of the low band portion and the first high band portion spirals includes substantially linear portions of conductive material.
- 9. An antenna according to claim 8, characterized in that the substantially linear portions of conductive material are arranged in pairs forming substantially right angles.
- 10. An antenna according to claim 1, wherein a carrier with predetermined dielectric properties supports the antenna.
- 11. An antenna according to claim 1, wherein the second high band portion (HB2) has a second grounding point arranged in close vicinity of the feeding point of the antenna.
- 12. An antenna according to claim 11, characterized in that the grounding point of the second high band portion is arranged at a distance between 0.1 mm and 1.0 mm from the feeding point of the antenna.
- 13. An antenna according to claim 11, characterized in that the grounding point of the second high band portion is arranged at substantially 0.5 mm distance from the feeding point of the antenna.
- 14. A mobile communications unit having an antenna according to claim 1.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2000 00820 |
May 2000 |
DK |
|
00610112 |
Nov 2000 |
EP |
|
Parent Case Info
This application claims benefit of Provisional Application 60/246,749 filed Nov. 9, 2000.
US Referenced Citations (5)
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/246749 |
Nov 2000 |
US |