Investigation of intelligent reflecting surfaces using lumped elements for 5G wireless communication networks

Alias, Nur Asyiqin and Abdul Malek, Norun Farihah and Bashri, Mohd Saiful Riza and Abdul Rahman, Farah Diyana and Mohd. Ramli, Huda Adibah and Azemi, Saidatul Norlyana and Islam, Md. Rafiqul (2025) Investigation of intelligent reflecting surfaces using lumped elements for 5G wireless communication networks. In: 2024 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE), 21-23 December 2024, Langkawi, Kedah.

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Abstract

In this study, an Intelligent Reflecting Surface (IRS) has been designed to operate at 3.5 GHz, featuring a compact unit cell measuring 42 mm x 42 mm with a Circular Patch and Ring configuration. The metasurface utilizes an FR- 4 substrate with a dielectric constant of 4.3, a loss tangent of 0.008, and copper as the ground plane. A lumped element is incorporated into the unit cell to function as a switch in both ON (1) and OFF (0) states. Four positions have been identified for the ON OFF resulting to 16 bits configurations. The SParameter is the primary focus of the analysis. At 3.5 GHz, for a unit cell using Floquet port simulation indicated that the 0000- bit configuration exhibited the highest reflection efficiency with an S11 magnitude of -0.7534 dB and a phase shift of -16.7°. This result suggests that the unit cell design with lumped elements perform well as a reflector, with the S11 magnitude approaching 0 dB indicating effective gain.

Item Type:	Proceeding Paper (Plenary Papers)
Uncontrolled Keywords:	Intelligent Reflective Surfaces, Reconfigurable Intelligent Surfaces, PIN Diode, Metamaterial, Lumped Element.
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 Kulliyyah of Engineering
Depositing User:	Dr Farah Diyana Abdul Rahman
Date Deposited:	03 Apr 2026 16:17
Last Modified:	03 Apr 2026 16:17
Queue Number:	2026-03-Q2696
URI:	http://irep.iium.edu.my/id/eprint/128123

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