A Compact UWB Monopole Antenna with Triple Band Notches

Abstract

This article presents an ultra-wideband (UWB) monopole antenna with triple band notch characteristics. The proposed antenna consists of an octagonal patch, fed with a 50 Ω line, which occupies a compact size of 40 mm × 29 mm (0.36λ × 0.26λ, λ is computed using 2.7 GHz frequency) and resonances at a relatively low frequency (2.94 GHz). Specifically, an L-shaped stub, an inverted C-shaped slot, and a pair of U-shaped resonating structures are introduced into the design, which allow antenna to generate three band notches at 3.22–3.83 GHz, 4.49–5.05 GHz and 7.49–8.02 GHz, corresponding to WiMAX band, Indian national satellite (INSAT) band, and X-band satellite frequencies, respectively. In the center of the notched band, the antenna has lower efficiency and gain, essentially indicating that the antenna has good interference rejection performance. To evaluate its performance, the proposed antenna has been fabricated and measured, and the relevant functional parameters, such as S-parameters, voltage standing wave ratio (VSWR) and radiation property, have been studied.

A compact tri-notched flexible UWB antenna based on an inkjet-printable and plasma-activated silver nano ink

“…Up to now, much effort has been made in the development of flexible/wearable antennas with notch properties, and a variety of notch techniques have been adopted, such as etching various shaped slot on the radiating patch 11 – 17 or ground plane incorporation of electric ring resonator (ERR) 18 , split ring resonators (SRRs) 11 , 19 – 22 or complementary split ring resonators (CSRRs) 23 – 26 , using parasitic elements 27 , 28 , defected ground structures (DGS) 29 – 31 and EBG resonators 32 – 35 , etc. For instance, Geyikoglu et al 29 demonstrated the design and implementation of a flexible UWB antenna with dual-band rejection capabilities for wearable biomedical devices.…”

Design of a Compact Dual Slot Loaded Planar Monopole Antenna with Dual Band Rejection Properties for Wideband Applications

“…Octagonal patch size of 40 mm × 29 mm is designed to get UWB from 2.70 GHz to 11.06 GHz. Specifically, an L-shaped stub, an inverted C-shaped slot, and a pair of U-shaped resonating structures are introduced into the design, which allow antenna to generate three band notches at 3.22-3.83 GHz, 4.49-5.05 GHz, and 7.49-8.02 GHz, corresponding to WiMAX band and Indian National Satellite (INSAT) band [12]. On the two C-shaped arms and the slots of the rectangular patch, pin diodes are utilized.…”