Antenna Arrangement

• US 20090309795A1
• Filed: 10/13/2005
• Published: 12/17/2009
• Est. Priority Date: 10/13/2005
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Nokia Corporation
• Inventors: Pohjonen, Helena
• Granted Patent: US 8,199,056 B2
• Time in Patent Office: Days
• US Class Current: 343/700.MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/52 Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure absorbing means H01Q17/00
• CPC Class Codes: H01Q 17/00 Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
• CPC Class Codes: Y10T 29/49016 Antenna or wave energy "plumbing" making

Abstract

An antenna arrangement comprising including a first antenna element having one or more surfaces; and a laminate attenuator, positioned adjacent a portion of at least one surface of the first antenna element, wherein the laminate attenuator is arranged or attenuating predetermined radio frequency electromagnetic waves.

Claims

1. An antenna arrangement comprising:

a first antenna element having one or more surfaces; and

a laminate attenuator, positioned adjacent a portion of at least one surface of the first antenna element, wherein the laminate attenuator is arranged for attenuating predetermined radio frequency electromagnetic waves.

2. An antenna arrangement as claimed in claim 1, further comprising a ground plane, wherein the laminate attenuator is positioned between the first antenna element and the ground plane.

3. An antenna arrangement as claimed in claim 2, wherein the first antenna element is operable in at least a first operational frequency band and the laminate attenuator is arranged to attenuate electromagnetic waves having a frequency within the first operational frequency band.

4. An antenna arrangement as claimed in any preceding claim 1, wherein the laminate attenuator comprises a plurality of laminas, wherein at least one of the laminas comprises metal.

5. An antenna arrangement as claimed in claim 3, wherein the laminate attenuator comprises a transducer which is arranged to convert electromagnetic waves having a frequency within the first operational frequency band into an acoustic wave having a frequency within the first operational frequency band.

6. An antenna arrangement as claimed in claim 5, wherein the laminate attenuator comprises a plurality of laminas and wherein the transducer is positioned between the first antenna element and the plurality of laminas.

7. An antenna arrangement as claimed in claim 6, wherein the laminate attenuator comprises a first material and a second material which are arranged alternately to form the plurality of laminas, the first material and the second material having substantially different acoustic impedances.

8. An antenna arrangement as claimed in claim 6, wherein each lamina of the plurality of laminas has a thickness which is equal to one quarter of the wavelength of the acoustic wave.

9. An antenna arrangement as claimed in any of claims 6, wherein at least one of the plurality of laminas comprises metal.

10. An antenna arrangement as claimed in claim 5, wherein the transducer comprises piezoelectric material.

11. An antenna arrangement as claimed in claim 1, further comprising a second antenna element, operable in at least a second operational frequency band, wherein the laminate attenuator is arranged to attenuate an electromagnetic wave having a frequency within the second operational frequency band.

12. An antenna arrangement as claimed in claim 11, wherein the laminate attenuator comprises a transducer which is arranged to convert electromagnetic waves having a frequency within the second operational frequency band into an acoustic wave having a frequency within the second operational frequency band.

13. An antenna arrangement as claimed in claim 12, wherein the laminate attenuator comprises a plurality of laminas which are positioned adjacent the first antenna. element and wherein the transducer is positioned adjacent the plurality of laminas, remote from the first antenna element.

14. An antenna arrangement as claimed in claim 13, wherein the laminate attenuator comprises a first material and a second material which are arranged alternately to form the plurality of laminas, the first material and the second material having substantially different acoustic impedances.

15. An antenna arrangement as claimed in claim 13, wherein each lamina of the plurality of laminas has a thickness which is equal to one quarter of the wavelength of the acoustic wave.

16. An antennas arrangement as claimed in claim 12, wherein the transducer comprises piezoelectric material

17. An antenna arrangement as claimed in claim 11, wherein the laminate attenuator is positioned adjacent each surface of the first antenna element.

18. An antenna arrangement as claimed in claim 11, wherein the first antenna element is operable in at least a first operational frequency band, and the antenna arrangement comprises a further laminate attenuator, positioned adjacent a portion of at least one surface of the first antenna element, wherein the further laminate attenuator is arranged to attenuate electromagnetic waves having a frequency within the first operational frequency band.

19. An antenna arrangement as claimed in claim 18, further comprising a ground plane, wherein the further laminate attenuator is positioned between the first antenna element and the ground plane.

21. An electronic device comprising an antenna arrangement as claimed in claim 1.

20. (canceled)

22. A method of forming an antenna arrangement, comprising:

providing a first antenna element having one or more surfaces;

positioning a laminate attenuator adjacent a portion of at least one surface of the first antenna element, wherein the laminate attenuator is arranged to attenuate predetermined radio frequency electromagnetic waves.

23. (canceled)

24. Use of a laminate attenuator in an antenna arrangement, the laminate attenuator comprising:

a first material and a second material, arranged alternately to form a plurality of laminas, the first material and the second material having substantially different acoustic impedances.