C-shaped UWB Dielectric Resonator Antenna With Dual Band-Notched Characteristics for WLAN and X-Band Applications

Abstract

in this article, a novel C-shaped ultra-wideband (UWB) Dielectric Resonator Antenna (DRA) With Dual Band-Notched Characteristics for WLAN/X Bands is presented and studied. The proposed DRA structure consists of an E-shaped dielectric resonator fed by a stepped Microstrip feed line and a partial ground plane. To realize dual band-notched characteristics of WLAN (5.1–5.9 GHz) and X-band (8.025–8.4 GHz), a Γ-shaped stub is connected to the feed line and an inverted C-shaped bandstop filter is placed near the Microstrip line. A comprehensive parametric study is carried out using HFSS software to achieve the optimum antenna performance and optimize the bandwidth of the proposed antenna. From the simulation results, it is found that the proposed antenna structure operates over a frequency range of 3.936 GHz to 15.00 GHz with a fractional bandwidth of 116.85%, with two band rejections in the frequency bands of 4.520–6.1 GHz and 7.20–8.424 GHz, which indicates that the antenna is a good candidate for UWB applications, and able to reduces interferences of WLAN band and X-band. The center frequencies and bandwidths of the two notched bands can be adjusted by altering the parameters of the Γ-shaped stub and C-shaped bandstop filter. Keywords— Ultra wideband (UWB), Dielectric Resonator Antenna (DRA), Dual band-notched, Γ-shaped stub, C-shaped bandstop filter.