Dual band/wide band antenna design for mobile phone communications

The next mobile communication generation needs to be multi-band but also require a large bandwidth behaviour for each band, all this associated with dimensions as small as possible. The paper presents a radiating structure having these different properties. The realisation of this antenna is obtained using a folded planar, metallic elements, ground wires and open quarter-wave slots. The influence of each technique and parameter is studied, analysed and optimised to obtain a single radiating dual-band / large bandwidth element, operating in GSM900, UMTS and also ISM 2.4 communication standards. The radiation pattern Of this antenna is suitable for mobile handset applications.