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1. (WO1998049743) ANTENNA FOR RADIO COMMUNICATIONS APPARATUS
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WHAT IS CLAIMED IS:

1. An antenna for a radio communications apparatus operating in the frequency range of 800 MHz - 3 GHz with a first radiating element in the form of a slot (9) in a substantially planar foil or disc-shaped metallic conductor (7), and a second radiating element set to a different resonance frequency from the first element, characterized in that the metallic conductor (7) is placed close to a second conductor (8) in the form of a metallic surface; and that the second radiating element is formed from an edge portion of the first conductor (7) or a gap or interstice between this and the second conductor (8).

2. The antenna as claimed in Claim 1, characterized in that capacitance devices (24, 25, 29, 30) are disposed between the edge portion and the second conductor (8).

3. The antenna as claimed in Claim 1 or 2, characterized in that the distance between the first (7) and the second (8) conductors is of the order of magnitude of 0.005-0.1 wavelengths.

4. The antenna as claimed in any of Claims 1 to 3, characterized in that the second conductor (8) has the same or larger surface extent than the first (7).

5. The antenna as claimed in any of Claims 1 to 4, characterized in that the slot (9) in the first conductor (7) has windings, meander formations or is zig-zag shaped.

6. The antenna as claimed in any of Claims 1 to 5, characterized in that the first conductor (7) is foil shaped and is disposed on a carrier (6) of electrically insulating, non-magnetic material, and located on the side of the carrier (6) facing away from the second conductor (8).

7. The antenna as claimed in any of Claims 1 to 6, characterized in that the slot (9) has a length of approx. one quarter wavelength, the slot having one open (12) and one closed (13) end.

8. The antenna as claimed in any of Claims 1 to 6, characterized in that the slot has a length of approx. one half wavelength, both ends of the slot being closed.

9. The antenna as claimed in any of Claims 1 to 8, characterized in that the first conductor (7) is in the form of an L, the slot (9) being disposed in the longer shank (5) of the L.

10. The antenna as claimed in any of Claims 1 to 9, characterized in that the capacitance device (29, 30) is galvanically connected an edge region of the first conductor (7), has a first portion (17, 20) which extends towards the second conductor (8) and a second portion (19, 21) which is galvanically discrete from and extends along the second conductor (8).

11. The antenna as claimed in any of Claims 1 to 9, characterized in that the capacitance device (24, 25) is galvanically connected to the second conductor (8), has a first portion (20) which extends towards the first conductor (7) and a second portion (21) which is galvanically discrete from and extends along an edge portion of the first conductor (7).

12. The antenna as claimed in any of Claims 1 to 11, characterized in that a plurality of capacitance devices (24, 25, 29, 30) are disposed between the first (7) and the second (8) conductor.

13. The antenna as claimed in any of Claims 1 to 12, characterized in that an electrically insulating, non-magnetic material is disposed between the carrier (6) and the second conductor (8).

14. The antenna as claimed in any of Claims 1 to 13, characterized in that the second conductor (8) is substantially planar.