Miniature multiantenna for optimal capacity in wireless microsystems

Next generation of wireless communications will require systems with broadband capabilities in small robust antennas. Compact multiple-input multiple-output (MIMO) antenna is a suitable candidate for fulfilling mobile applications demands for high speed and high quality transmission. In this paper, a miniature multi-layered broadband four-element antenna with an optimized decoupling technique is presented. The antenna structure, which has been implemented in a reduced area of lambda/2timeslambda/2, operates at the wireless frequency band of 2.45 GHz. Each of the four radiating elements consists of two stacked patches over a ground plane. Four decoupling bridges have been placed between those elements in order to decrease mutual coupling and maximizing the capacity for a complete RF system channel model.