UWB tapered microstrip antenna with wideband notch using single split ring resonators shaped parasitic conductor

This contribution presents the design of a wideband-notched UWB tapered antenna using a single split ring resonator (SRR). The SRR is etched as parasitic loaded on the back side of the radiator element of the monopole antenna to achieve a frequency notch at 5.05-5.95 GHz. The dynamic resonance of the SRR element drives the notched center frequency and the coupling gap between the antenna ground plane and the SRR-shaped parasitic determines both the impedance bandwidth and the rejection level. The measurement results demonstrated that the proposed antenna can guarantee a wide bandwidth of about 1GHz with an unwanted wideband notch avoiding interferences caused by coexisting WLAN systems. As part of the optimization design, we analyzed the effect of the coupling gap between the SSR parasitic and the antenna ground plane.