Vahid Sharbati - Semnan University
Pejman Rezaei - Semnan University
Amin Kordinejad - Semnan University

Cognitive radio is special concept that uses the spectrum effectively by shifting the frequency bands in wireless communications. The microstrip antenna is accordance with an UWB design and has a reconfigurability. This paper provides a detailed discussion of the existing UWB spectrum sensing reconfigurable microstrip antenna designs for cognitive radio applications. For this purpose, an UWB antenna covering the spectrum from 3.1-11 GHz for channel sensing and the reconfigurable characteristic is achieved by means of two ideal switches. When both switches are in the ON state, the range of 3.3-4.2GHz is notched and when the S1 is in the ON state, the ranges of 5.4-5.8GHz and 3.7-4.4GHz are notched.

UWB; Reconfigurable Microstrip Antennas; Cognitive Radio