Design and Performance Analysis of Uwb Circular Ring Antenna With Defected Ground Structure

Abstract

A compact circular ring antenna with defected ground structure (DGS) has been design for Ultra-Wide Band (UWB) applications. Initially, a circular patch antenna is design by introducing a rectangular DGS structure. Further, slot has been inserted in circular patch to improve the impedance bandwidth. The proposed design covers the frequency range of 2.4-10.4GHz below -10dB. Proposed antenna has design and fabricated on FR -4 substrate having 1.5mm, 4.3 thickness and dielectric constant, respectively. The performance of the designed antenna is analyzing with optimized dimensions in terms of return loss, VSWR, radiation pattern, gain characteristics, group delay and surface current distributions. Further, performance analysis of the proposed antenna has also been compared with existing suggested antennas in literature with compact in size. The fabricated antenna shows a good result with simulations software.

Design and Analysis of Quad Dumbbell Shaped Directive UWB Antenna for Microwave Tumour Detection Integrated with Meander Strip Resonators

“…Due to the compact size and low cost, such types of antennas are easy to integrate and more versatile with modern wireless equipment [1]. Without affecting the directional UWB characteristics, the major challenges in the design of these antennas with multiband applications are impedance matching, electromagnetic interference, stable radiation characteristics, and compact size [2][3][4][5][6].…”

“…From the literature, most of the researchers focus on the design of directional UWB antenna with defected ground structure to achieve ultra-wideband, moderate gain, and directivity [7][8][9][10]. Meena et al designed elliptical and circular ring having defected ground structure directional UWB antennas for microwave imaging, radar systems, C & X band applications with good directional characteristics and size 40 × 40 mm 2 , but reported antennas are limited to UWB only [11][12][13][14][15]. Further, the design of multiband antennas was proposed with size 160 × 160 mm 2 and operating frequency in the range of 5-5.5 GHz, but applications of the proposed antennas are for lower wireless band only without covering UWB [16][17][18][19][20].…”