Reconfigurable Fractal Antenna for Cognitive radio

Reconfigurable antennas have ability to adjust their geometry and behavior to get used to changes in environmental conditions or system requirements. Such as enhanced bandwidth, change in operating frequency, polarization, radiation pattern etc. This paper discusses the use of multiband reconfigurable fractal antennas for cognitive radio once a cognitive device manages to learn the RF environment (cognition part), from past observations and decisions using machine learning techniques.