The proposed work focuses on a Reconfigurable Microstrip antenna to employ in inlay and prime layer Ultra-Wideband Cognitive Radio (UWB-CR) applications. The Defected Ground Structure (DGS) is employed on the ground plane of the antenna to operate at UWB, for prime layer CR and for sensing in the inlay CR. When used in the inlay CR mode, selectively have one, two or three notches in the Bluetooth (2.4GHz), Wi-MAX (3.1 GHz - 3.8GHz) and WLAN (5.1GH-5.8GHz) to avoid interference to the direct users operating in these bands. The band notch characteristics are achieved by etching the three Split Ring Resonators on the patch namely, Split-Ring Resonator (SRRs), Complementary SRR (CSRR) and Elliptical SRR (ESRR). The SRRs are controlled using three electronic switches which are mounted over it to achieve the Reconfigurability of notch frequencies. The proposed antenna is simulated using CST STUDIO V.14.
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