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An isofrequency RF repeater operating at 5 GHz (WIMAX band) using pixeled parasitic elements to enhance the isolation level between the receiving (Rx) and the transmiting (Tx) antennas is presented. The design consists of two back to back active dipole antennas separated by a metallic reflector plane. A set of reconfigurable parasitic pixeled dipole strips are placed between the metallic reflector...
In this paper we investigate a new approach in optimizing the number of switches in reconfigurable antennas designed for MIMO (Multiple Input Multiple Output) applications. Reducing the number of switches in reconfigurable antenna structures can lead to cost effective designs and reduce losses. Here a new optimization technique based on graph theory is introduced. A specific example is presented and...
In this paper, we propose a novel Multiple-Input Multiple-Output (MIMO) wireless communication system employing reconfigurable PIXEL antennas at the receiver. We design a Space-Time-State Block Coding scheme for the PIXEL-based reconfigurable MIMO system and propose optimal and ad hoc state-selection algorithms that achieve maximum diversity gains. Moreover, we prove that in state-selection schemes,...
In this paper we propose a software defined highly multifunctional pixeled antenna for narrowband multiple-input multiple-output (MIMO) wireless communication systems, that uses micro electromechanical switches (MEMS) to reconfigure its radiation modes and operating frequency. These capabilities can be used to improve the performance of current narrowband communication systems and also to fit some...
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