Patent ID: 6600901
Filing Date: 2003-07-29
Classification: H01Q

Abstract:
A mobile phone (1) having plural operation modes, said plural operation modes including an idle operation mode and a conversation mode, wherein in said idle operation mode control signals are transmitted to or received from a base station and an active telecommunication connection is not established with the mobile phone and wherein in said conversation mode said active telecommunication connection is established with the mobile phone, said mobile phone comprising (1):an antenna arrangement (5) consisting of at least one antenna element (10,15; 95): means (70, 75) for supplying electrical energy to said antenna arrangement so as to propagate radiation from said at least one antenna element in a selected one of at lea two different radiation patterns (30, 35, 40), wherein said at least two different radiation patterns include an omnidirectional radiation pattern (30) in which said radiation is propagated from the at least one antenna element equally in all directions and a directional radiation pattern (35) in which said radiation is propagated in one privileged direction such that said radiation does not enter a head of a user when the mobile phone is placed against an ear of the user; means (20) for changing operation mode of the mobile phone between said idle operation mode and said conversation mode; and means for controlling said means for supplying electrical energy to said antenna arrangement to select said selected one of said at least two different radiation patterns propagated from said at least one antenna element, so as to propagate said radiation during said idle operation mode in said omnidirectional radiation pattern and during said conversation mode in said directional radiation pattern with said one privileged direction, so that said radiation is prevented from entering said head of said user during said conversation mode.