Measurement Analysis of Ultra-Wideband Monopole Antenna With Defected Ground Structure

Publisher: IGI Global_journal

E-ISSN: 2156-1729|6|1|1-12

ISSN: 2156-1737

Source: International Journal of Measurement Technologies and Instrumentation Engineering (IJMTIE), Vol.6, Iss.1, 2017-01, pp. : 1-12

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Abstract

This article describes how a compact, low profile Ultra-wideband (UWB) monopole antenna with a defected ground structure is designed and demonstrated experimentally. The design and experimentation activities have been carried out with the help of a CST Microwave studio tool. The UWB characteristics of the proposed antenna are achieved with a modification of the ground structure of the referenced antenna with novel L shaped defected ground structure (DGS). Both antennas are fabricated on the same substrate with the dimensions of 28.3 x 24 mm2. The comparative analysis of the results for both antennas clearly indicate that the proposed UWB monopole antenna enhanced the impedance bandwidth from 3.7 GHz – 14.9 GHz without DGS and to 3.4 GHz – 20 GHz with DGS. The enhanced bandwidth, constant group delay and good radiation characteristics of the proposed antenna have identified it as a good candidate for portable UWB applications.