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Recent trends in handset antenna design are oriented to maximise the contribution of the ground plane to the radiation process. The challenge of these techniques mainly relies on the complexity of the radiofrequency system (combination of inductors, capacitors, and transmission lines) required to satisfy bandwidth and efficiency specifications. With the aim of simplifying the said radiofrequency system, proposed is a new solution capable of minimising the number of reactive components in a ground plane booster-based antenna technology. The results demonstrate that the number of reactive elements can be reduced by a factor around 3 with respect to previous solutions while improving the electromagnetic performance. The benefits of such reduction not only rely on a significant decrement of power losses but also on an enhancement of the performance and the integration capabilities. Based on the proposed architecture, hepta-band operation at GSM850/GSM900/DCS/PCS/UMTS/LTE2300/LTE2500 is achieved by means of two ground plane boosters of 5/5/5/mm and a radiofrequency system composed of only five reactive components.
Date of Publication: July 5 2012