MULTILEVEL ANTENNAE

• US 20090167625A1
• Filed: 03/10/2009
• Published: 07/02/2009
• Est. Priority Date: 09/20/1999
• Status: Active Grant

• Current Assignee: Fractus SA
• Original Assignee: Fractus SA
• Inventors: PUENTE BALIARDA, CARLES, SOLER CASTANY, JORDI, ANGUERA PROS, JAUME, BORJA BORAU, CARMEN
• Granted Patent: US 8,009,111 B2
• Time in Patent Office: Days
• US Class Current: 343/848
• CPC Class Codes: H01Q 1/241 used in mobile communications, e.g. GSM H01Q1/247, H01Q1/248 take precedence
• 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 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/50 Structural association of antennas with earthing switches, lead-in devices or lightning protectors
• CPC Class Codes: H01Q 5/10 Resonant antennas
• CPC Class Codes: H01Q 5/20 characterised by the operating wavebands
• CPC Class Codes: H01Q 5/307 Individual or coupled radiating elements, each element being fed in an unspecified way
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 5/50 Feeding or matching arrangements for broad-band or multi-band operation
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/065 Microstrip dipole antennas patch antenna H01Q9/0407
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An apparatus including a wireless communications device has an internal antenna system located within the wireless communications device. The internal antenna system includes a passive antenna set comprising at least one antenna element having at least one multilevel structure, a feeding point to the at least one antenna element and a ground plane. The feeding point and a point on the ground plane define an input/output port for said passive antenna set. The passive antenna set provides a similar impedance level and radiation pattern at two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels. The selected channels are selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands.

Claims

1. An apparatus including a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set comprising;

at least one antenna element having at least one multilevel structure;

a feeding point to said at least one antenna element;

a ground plane;

wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set and said passive antenna set provides a similar impedance level and radiation pattern at two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands.

2. An apparatus as set forth in claim 1 wherein the at least one multilevel structure comprises a plurality of generally identifiable cylinders.

3. An apparatus, as set forth in claim 1, wherein the internal antenna system further includes a matching network connected to said input/output port.

4. An apparatus, as set forth in claim 1, further including at least one dielectric spacer for separating the at least one antenna element from the ground plane, wherein at least a portion of said dielectric spacer overlaps a dielectric substrate layer placed over the ground plane.

5. An apparatus, as set forth in claim 1, wherein the internal antenna system provides at least three frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least three frequency bands.

6. An apparatus, as set forth in claim 1, wherein the internal antenna system provides at least four frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least four frequency bands.

7. An apparatus, as set forth in claim 1, wherein said at least one antenna element is physically smaller in area than a conventional multiband antenna system formed by a plurality of combined single band rectangular antennas equal in number to a number of frequency bands of said conventional multiband antenna.

8. An apparatus, as set forth in claim 1, wherein said at least one antenna element resonates at a lower frequency than a rectangular antenna defined by a smallest rectangle that encompasses the entire at least one antenna element.

9. An apparatus, as set forth in claim 1, wherein said internal antenna system is a patch antenna.

10. An apparatus, as set forth in claim 1, wherein said internal antenna system is a monopole antenna.

11. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one GSM service.

12. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one GSM service in a 1710-1880 MHz frequency range.

13. An apparatus, as set forth in claim 1, wherein said apparatus provides at least at three frequency bands and operates at one GSM service in the 1710-1880 MHz frequency range.

14. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular service in a 1850-1990 MHz frequency range.

15. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular service in a 1710-1880 MHz frequency range.

16. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular service in a 2110-2155 MHz frequency range.

17. An apparatus, as set forth in claim 1, wherein said apparatus provides at least one cellular service in a 1710-1755 and in a 2110-2155 MHz frequency range.

18. An apparatus including a wireless communications device having an internal antenna system located within the wireless communications device, wherein said internal antenna system includes a passive antenna set comprising;

at least one antenna element having at least one multilevel structure;

a feeding point to said at least one antenna element;

a ground plane;

wherein said feeding point and a point on the ground plane define an input/output port for said passive antenna set and said passive antenna set provides a similar impedance level and radiation pattern at two or more frequency bands such that the passive antenna set is capable of both transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said two or more frequency bands;

wherein said antenna element is not a deterministic self-similar fractal.

19. An apparatus as set forth in claim 18 wherein the at least one multilevel structure comprises a plurality of generally identifiable cylinders.

20. An apparatus, as set forth in claim 18, wherein the internal antenna system further includes a matching network connected to said input/output port.

21. An apparatus, as set forth in claim 18, further including at least one dielectric spacer for separating the at least one antenna element from the ground plane, wherein at least a portion of said dielectric spacer overlaps a dielectric substrate layer placed over the ground plane.

22. An apparatus, as set forth in claim 18, wherein the internal antenna system provides at least three frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least three frequency bands.

23. An apparatus, as set forth in claim 18, wherein the internal antenna system provides at least four frequency bands having similar impedance levels and radiation patterns and further wherein the internal antenna system is capable of at least one of transmitting and receiving wireless signals on selected channels, the selected channels selectable from a plurality of channels throughout an entire frequency range within each of said at least four frequency bands.

24. An apparatus, as set forth in claim 18, wherein said at least one antenna element is physically smaller in area than a conventional multiband antenna system formed by a plurality of combined single band rectangular antennas equal in number to a number of frequency bands of said conventional multiband antenna.

25. An apparatus, as set forth in claim 18, wherein said at least one antenna element resonates at a lower frequency than a rectangular antenna defined by a smallest rectangle that encompasses the entire at least one antenna element.

26. An apparatus, as set forth in claim 18, wherein said internal antenna system is a patch antenna.

27. An apparatus, as set forth in claim 18, wherein said internal antenna system is a monopole antenna.

28. An apparatus, as set forth in claim 18, wherein said apparatus provides at least one GSM service.

29. An apparatus, as set forth in claim 18, wherein said apparatus provides at least one GSM service in a 1710-1880 MHz frequency range.

30. An apparatus, as set forth in claim 18, wherein said apparatus provides at least at three frequency bands and operates at one GSM service in the 1710-1880 MHz frequency range.

31. An apparatus, as set forth in claim 18, wherein said apparatus provides at least one cellular service in a 1850-1990 MHz frequency range.

32. An apparatus, as set forth in claim 18, wherein said apparatus provides at least one cellular service in a 1710-1880 MHz frequency range.

33. An apparatus, as set forth in claim 18, wherein said apparatus provides at least one cellular service in a 2110-2155 MHz frequency range.

34. An apparatus, as set forth in claim 18, wherein said apparatus provides at least one cellular service in a 1710-1755 and in a 2110-2155 MHz frequency range.