Patent ID: 6937196
Filing Date: 2005-08-30
Classification: H01Q

Abstract:
1. An internal multiband antenna of a radio device having at least a first and a second operating band and comprising a ground plane, radiating element, feed element, feed conductor and a short-circuit conductor, wherein the radiating element is galvanically isolated from the other conductive parts of the radio device, there is an electromagnetic coupling between the radiating element and feed element to transfer transmitting energy to the field of the radiating element and receiving energy to the field of the feed element, the feed element is connected through the short-circuit conductor to the ground plane at a short-circuit point to match the antenna, the short-circuit point divides the feed element into a first portion and second portion, and the first portion of the feed element together with the radiating element and ground plane is arranged to resonate in range of the first operating band of the antenna, and the second portion of the feed element together with the radiating element and ground plane is arranged to resonate in range of the second operating band of the antenna.