A novel circular fractal ring UWB monopole antenna with dual band‐notched characteristics

Abstract

This paper presents a novel circular fractal ring monopole antenna for ultra‐wideband (UWB) hardware with dual band‐notched properties. The proposed antenna consists of four crescent‐shaped nested rings, a tapered feeding line at the front of the dielectric material, and a semicircular ground plane on the backside. In this design, the nested rings are used both as a radiation element and a band rejection element. The proposed antenna has a bandwidth of 9.03 GHz, which works efficiently in the range of 2.63 GHz–11.66 GHz with the dual notched bands of Worldwide Interoperability for Microwave Access (WiMAX) at 3.15 GHz–3.66 GHz and wireless local area network (WLAN) at 4.9 GHz–5.9 GHz, respectively. The antenna has a compact size of 20 mm × 30 mm × 1 mm (0.177 × 0.265 × 0.0084 λ0) and is implemented using a flame‐retardant type 4 (FR4) material. It has a maximum gain of approximately 4 dB in its operating range, and experimental results support the simulation predictions with high accuracy. The findings of this study imply that the designed antenna can be utilized in UWB applications.

A novel and compact ultra‐wideband printed monopole antenna with enhanced bandwidth and dual‐band stop properties

“…Also, in terms of peak gain value and impedance bandwith, the proposed antenna has reasonable values. Dimensions (Guided wavelength) [9] 2.8-11.8 4.8 3.3-3.8 5.1-6 20 × 18 × 1 0.8λ g × 0.72λ g × 0.04λ g [10] 2.64-12.9 6.7 4.8-5.9 7.1-7.8 31 × 30.5 × 1.575 1.01λ g × 0.99λ g × 0.05λ g [11] 2.63-11.66 4 3.15-3.66 4.9-5.9 30 × 20 × 1 1.17λ g × 0.78λ g × 0.04λ g [12] 2.8-11 3.9 3.3-4 5.05-5.9…”

“…6,7 However, to effectively operate within the UWB spectrum and enhance the performance of the designed UWB antenna, it is favorable to design these structures with dual bandrejection functions. This has previously been executed by using the inverted U-shaped and Iron shaped parasitic resonators, 8 by putting a modified G-slot defected ground structure (DGS) in the feed line and two Γ-shaped stubs in the radiation patch, 9 combining mushroom-shaped EM-bandgap and a slot, 10 by using four crescent-shaped nested rings, 11 or employing a pair of U-shaped parasitic strips and a T-shaped stub embedded in the radiating patch. 12 Additionally, various other methods have been employed to introduce dual band-stop characteristics for rejecting the interference in the UWB antennas.…”