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In this paper, an optically-switched frequency-reconfigurable antenna for cognitive radio applications has been proposed. The antenna design is comprised of two units, namely the UWB unit, that senses the spectrum from 2.5–8 GHz, and the reconfigurable unit that switches between 3.9 GHz and 6.2 GHz resonant frequencies. The dark and active states of the reconfigurable unit are controlled using IREDs...
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