Design and comparative validation of antipodal vivaldi antenna using periodic elliptical-slots with extended triangular-shaped as dielectric lens for microwave imaging applications

Shaikh, Faraz Ahmed and Khan, Sheroz and Alam, A. H. M. Zahirul and Shahid, Zeeshan and Khan, Talha Ahmed (2019) Design and comparative validation of antipodal vivaldi antenna using periodic elliptical-slots with extended triangular-shaped as dielectric lens for microwave imaging applications. In: 2019 IEEE 6th International Conference on Smart Instrumentation, Measurement and Applications (ICSIMA 2019), 27th-29th August 2019, Kuala Lumpur, Malaysia.

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Abstract

This paper presents the novel design of an ultra" #ideband (UWB) antipodal Vivaldi antenna using periodic elliptical slots (PES"AVA) for microwave and radar imaging applications. Further, the high permittivity (ɛr=10.2) dielectric lens which triangular in shaped is introduced in"!ront (PES" AVA"3) to improve the linear polarization performance, gain as well as directivity of the antenna. The antenna design and its optimization process offer good outcomes by using low"+ost substrate material, fiberglass reinforced grade 4 (FR4) with a thickness of 1.57mm and permittivity of (ɛr=4.3) respectively. The (PES"AVA) antenna design produces the average effects of gain (5"9dB) and directivity of (5"10dBi). However, the addition of the triangular"shaped dielectric lens placed in front of an antenna is able to improve the peak gain up to 10.6dB with 11.9dBi in directivity. The radiation patterns of the proposed antenna have been also improved by using the dielectric lens where the magnitude of the main lobe is larger than (PES"AVA). Around 2dB improvements in gain at different UWB frequency level with better directivity using the dielectric lens with antenna (PES"AVA"3) as compared to regular (PES"AVA). The dimension of the proposed antenna is 60.75mm x 66mm approximately. The designed antenna operates with in frequency range of (3GHz"to"10GHz). The structural layout and comparative validation of (PES"AVA) with or with"out dielectric lens have been certified using CST simulation software.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	3930/76167
Uncontrolled Keywords:	UWB; AVA; PES-AVA; PES-AVA-D; VSWR; SLL and CST
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Prof. Dr. AHM Zahirul Alam
Date Deposited:	13 Nov 2019 16:35
Last Modified:	12 May 2020 11:18
URI:	http://irep.iium.edu.my/id/eprint/76167

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