A cognitive radio antenna design based on optically pumped reconfigurable antenna system (OPRAS)
Y. Tawk, Sameer D. Hemmady, Christos George Christodoulou, Joseph Costantine, G. Balakrishnan · 2011
This paper presents a new antenna scheme for cognitive radio communication. The antenna structure consists of two ports. The first antenna port is a UWB structure for channel sensing while the second one is a reconfigurable structure for communication. The reconfigurability is based on integrating laser diodes within the antenna substrate in order to activate the photoconductive switches. A prototype was fabricated and tested. A good agreement between the simulation and the measurement data is noticed. A coupling of less than -20 dB is achieved between the 2 antenna ports.