Compact CPW fed Four Port MIMO Antenna for UWB applications with Wi-Fi/ISM/WLAN Band Notch Characteristics

Abstract

A compact UWB with WLAN notch-based four-element CPW fed MIMO/diversity antenna is presented in this paper. Multiple elements facilitate the design to transmit and receive the signal from all directions enhancing the channel capacity and diversity performance. The inverted L-shaped stub attached to the ground enhances the impedance bandwidth (10 dB) and provides the UWB response. Plus and cross-shaped decoupling structure is accomplished to diminish the surface current and enhances the isolation between antenna elements and it is more than 20.2 dB from port-1 to port-4 without affecting the impedance bandwidth and radiation pattern. A complimentary split ring resonator (CSRR) in the radiator is utilized to eliminate the Wi-Fi/WLAN band. The |S11| of UWB MIMO antenna varies from 3.26 GHz to 14 GHz which can be utilized in portable, Radar, Satellite, and wireless applications. The simple decoupling structure is used to correlate and isolate the antenna elements, therefore acceptable ECC and CCL parameters are achieved.