Patent ID: 7081857

Claim:
An arrangement for connecting an additional antenna to a radio device which has a ground plane and an internal planar antenna with a radiating plane, which arrangement comprises a first coupling part for providing coupling with the internal antenna, a second coupling part for providing coupling with the ground plane and an intermediate cable for the additional antenna, the second coupling part comprising a conductive plate galvanically isolated from the radio device, which plate, when the arrangement is in use, is substantially parallel to the ground plane of the radio device and in front thereof in the direction of the normal of the ground plane in order to take energy from the radio frequency field of the ground plane, wherein the first coupling part comprises at least one coupling conductor galvanically isolated from the radio device, which conductor, when the arrangement is in use, follows a conductive branch of the radiating plane of the internal antenna being located over said conductive branch for most of the length thereof, to take energy from the near field of the internal antenna, and a first conductor of the intermediate cable is in galvanic contact with said coupling conductor, and a second conductor of the intermediate cable is in galvanic contact with said conductive plate near the connection point of the first conductor.