Antenna Arrangement and Antenna Housing

• US 20100073247A1
• Filed: 04/10/2007
• Published: 03/25/2010
• Est. Priority Date: 04/10/2007
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Arkko, Aimo, Ollikainen, Jani
• Granted Patent: US 8,432,321 B2
• Time in Patent Office: Days
• US Class Current: 343/745
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 13/18 the slot being backed by, or formed in boundary wall of, a resonant cavity longitudinally slotted cylinder H01Q13/12 ; Open cavity antennas

Abstract

An antenna arrangement including an antenna occupying at least a first plane; a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.

Claims

1. An antenna arrangement comprising:

an antenna occupying at least a first plane;

a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.

2. An antenna arrangement as claimed in claim 1, wherein the conductive structure is part of a housing for the antenna arrangement.

3. An antenna arrangement as claimed in claim 2, wherein the housing is a housing for an apparatus and the antenna is an internal antenna located inside the housing.

4. An antenna arrangement as claimed in claim 2, wherein the housing comprises an edge and the slot terminates at the edge.

5. An antenna arrangement as claimed in claim 2, wherein the housing has a face bounded by edges and the slot is positioned wholly within the face.

6. An antenna arrangement as claimed in claim 1, wherein the antenna has a first resonant frequency and the slot is dimensioned to have an electrical length that corresponds to one or more multiples of one quarter of the resonant wavelength corresponding to the first resonant frequency.

7. An antenna arrangement as claimed in claim 1 wherein the slot has a minimum width and a length and the length is at least ten times greater than the minimum width.

13. An antenna arrangement as claimed in claim 1, comprising an electric circuit connected across the slot.

15. An antenna arrangement as claimed in claim 13, wherein the electric circuit comprises a single component.

16. An antenna arrangement as claimed in claim 1, wherein a plastic housing comprises a metallic covering and the slot is defined by an absence of the metallic covering.

18. An antenna arrangement as claimed in claim 1, wherein the antenna is a chip dielectric feeding antenna.

19. An apparatus comprising a housing, with exterior metallization, that defines an interior cavity and an antenna arrangement as claimed in any preceding claim, positioned within the cavity, wherein the exterior metallization provides the conductive structure and the slot provides an electromagnetic aperture to the interior cavity.

20. An apparatus as claimed in claim 19, wherein the slot is covered with a dielectric.

8. (canceled)

14. An antenna arrangement as claimed in claim 8, wherein the impedance of the electrical circuit tunes a resonant frequency of the antenna arrangement to a first resonant frequency.

9. (canceled)

10. (canceled)

11. (canceled)

12. (canceled)

17. (canceled)

21. An apparatus comprising a conductive housing that defines an interior cavity, an opening in the conductive housing, and an antenna positioned within the cavity adjacent the opening.

22. An apparatus as claimed in claim 21, wherein, in operation, the antenna feeds the conductive housing which operates as a resonator.

23. An apparatus as claimed in claim 21, wherein the antenna has a first resonant frequency and the opening has an electrical dimension corresponding to a resonance at the first resonant frequency.

24. An apparatus as claimed in claim 21, wherein the conductive housing comprises a dielectric substrate and an exterior metallization.

25. An apparatus as claimed in claim 21, wherein no conductive element or elements intervene between the antenna and the slot.

26. An antenna arrangement comprising:

an antenna having a first resonant wavelength λ

;

a conductive housing that is isolated from the antenna but is indirectly fed by the antenna, the conductive housing having a slot that has an electrical length that corresponds to a multiple of λ

/4.

27. (canceled)