Circular Split Ring Resonator Asymetrical CPW-fed Dual Port MIMO Antenna for Wireless and Satellite Applications

The dual-port, multiple input multiple output (MIMO) antenna having very less designed footprint of 25×25mm
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operating in WLAN/X/Ku band is reported for wireless and Satellite applications. By using an inverted Z-shaped radiator connected to a circular split ring resonator excites the three resonant frequency modes at 2.5, 9.45 and 12.3 GHz which covers the WLAN, X and Ku band. Further a vertical line consisting of several slant parallel stubs of size 2×0.5mm
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placed at a distance of 1.9mm from each other acts as an isolating element is placed in between both the antenna elements. This entire structure generates bandwidth of 10.73 % (2.38 – 2.65 GHz) in F1 band, 27.20% (8.10 – 10.65 GHz) in F2 band and 34.86% (11.39 – 16.20 GHz) in F3 band along with minimum mutual coupling of -18dB, gain better than 1.5dBi, efficiency 70%, Envelope Correlation Coefficient (ECC)~0.01, diversity Gain (DG) ~10dB and Total Active Reflection Coefficient (TARC) below -10dB in the entire band of interest.