A monopole UWB antenna with sextuple band-notched based on SRRs and U-shaped parasitic strips

In this paper a microstrip-line fed ultra-wideband (UWB) antenna with sextuple rejection bands is presented and investigated. The antenna consists of an elliptic radiation and a rectangle ground plane. The band rejections at worldwide interoperability for microwave access (MiMAX) band (2.96-3.33 GHz and 3.73-3.88 GHz) are achieved by etching an elliptic split ring resonator (ESRR) and a round split ring resonator (RSRR) in the radiating patch. Four various sizes of U-shaped parasitic strips near the feed line have been used to accomplish the band rejection characteristics at INSAT band (4.43-4.53 GHz), WLAN band (5.37-5.57 GHz), and C-band (7.02-7.30 GHz and 7.56-8.06 GHz). Simulated results indicate that the center frequency of each desired frequency can be adjusted independently without affecting the other bands by altering its corresponding parameters. Furthermore, the performance analysis of the equivalent circuit model of the proposed antenna is presented. The experimental and measured results of reflection coefficient provide evidences that the proposed antenna has a wide impedance with six rejection bands. Moreover, the radiation pattern and peak gain of the proposed antenna have also been investigated. Similarly, the good agreement between the simulated and measured results ensures the suitability of the proposed antenna for UWB applications. (C) 2020 Elsevier GmbH. All rights reserved.