Power amplifier based integrated and miniaturized active antenna

In this paper, a power amplifier (PA) integrated active antenna is presented. A new approach to antenna miniaturization is introduced through the direct integration and co-design with the amplifier. The detailed design procedure is presented and the concept is demonstrated with a rectangular patch antenna. The PA and the antenna are co-designed so that optimum performance is achieved. The antenna is miniaturized from its nature resonance frequency 2.95 GHz to 2.45GHz which is 31% size reduction. The bandwidth of the antenna is found to be 37MHz and its efficiency is more than 50% when operating between 2.43–2.467GHz. The gain and noise figure of the amplifier are optimized along with the antenna performance as an active integrated antenna (AIA) system and found to be around 8 and 2dB respectively across the operating band.