A modified PEC-backed spiral antenna with improved pattern symmetry

Sulong, Nurul Iffarina and Mohamad, Sarah Yasmin and Islam, Md. Rafiqul and Hasbullah, Nurul Fadzlin (2017) A modified PEC-backed spiral antenna with improved pattern symmetry. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 9 (3 ( July-Sep)). pp. 33-36. ISSN 2180-1843 E-ISSN 2289-8131

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Abstract

This paper discussed the pattern symmetry of a two-arm Archimedean spiral antenna which is designed to operate over the Ultra-Wide band (UWB) frequency range of 3.1 GHz to 10.6 GHz. The geometrical design of the spiral antenna is simulated and executed using CST Microwave Studio (CST MWS) software. The simulated radiation performances such as radiation pattern, maximum and minimum 3 dB beamwidth, current distribution and gain have been analyzed. The results are compared in three conditions; in free space (with no ground plane), above a solid PEC ground plane, and above a modified PEC ground plane (with circular patterns). Both the PEC reflectors are placed below the spiral antenna with a separation distance of λ/4 at lower frequency flow = 3.1 GHz, center frequency fcenter = 6.85 GHz, and higher frequency fhigh = 10.6 GHz of UWB. It is shown that the spiral antenna above the modified PEC backing provides an overall better performance, giving a unidirectional radiation pattern with high gain and improved pattern symmetry compared to the other two configurations.

Item Type:	Article (Review)
Additional Information:	7441/58707
Uncontrolled Keywords:	Archimedean spiral antennas; Frequency independent antennas; Pattern symmetry; PEC reflector; Spiral antennas; Ultra-Wide band (UWB)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr Sarah Yasmin Mohamad
Date Deposited:	11 Oct 2017 08:36
Last Modified:	15 Mar 2018 08:58
URI:	http://irep.iium.edu.my/id/eprint/58707

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