US Patent 7750866 Diversity antenna assembly for wireless communication equipment

An antenna assembly for wireless communication equipment comprises an antenna structure comprising at least a loop type antenna arranged to deliver a first current when it is used in a balanced mode and/or a second current when it is used in an unbalanced mode with respect to a ground plane from received radio signals, and current extraction device coupled to the antenna structure and arranged to be placed in at least a first state in which the current extraction device delivers the first or second current and a second state in which the current extraction device simultaneously delivers the first and second currents either separately or mixed together.