Compact Antenna Technology for Wireless Communications

A wireless device comprising a radiating system that comprises:

• first and second ports;
• and
• a board including a radiating structure, the radiating structure comprising:
• a ground plane layer comprising a clearance containing a slot defined by a curve, the curve containing first and second connecting points;
• a boosters piece mounted on the ground plane clearance and comprising at least portions of first and second boosters arranged in a non-concatenated disposition and at least one non-electrical connection element affixing the boosters piece to the board that contains the radiating structure, the first booster comprising a conductive surface contained in a top surface of the boosters piece and including at least one connection point connected to a via of the boosters piece, the via comprising a feeding point, the second booster comprising a feeding conductive strip contained in the boosters piece, the feeding conductive strip being positioned at a distance d2 from a closest edge of the boosters piece and being connected to the first and second connecting points of the curve defining the slot of the ground plane layer and containing a feeding point, wherein the via is positioned at a distance d1 from said closest edge of the boosters piece to the feeding conductive strip, and wherein the boosters piece features a largest dimension smaller than λ/20, where λ is the free-space wavelength corresponding to a lowest frequency of operation of the radiating system;
• and
• a radiofrequency system connected by conductive pads to at least one of the feeding point of the first booster or the feeding point of the second booster.