https://orcid.org/0000-0002-0015-5972
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Abstract
In this paper, compact Ultra-Wide Band (UWB) 1:2:1 unequal split modified Bagley Power Divider (BPD) using Non-Uniform Transmission Lines (NTLs) theory is designed and tested. Based on this theory, 42.44% and 31.1% size reductions are obtained in the lower and upper λ/4 Uniform Transmission Lines (UTLs) in the first and second sections of the proposed divider. To evaluate the effect of the divider’s compactness on its performance, it is compared with UWB 1:2:1 unequal split BPD using Tapered Transmission Lines (TTLs). Both dividers show good results where the measured return loss is appeared to be S11 < −10.6 dB and < −13.4 dB for NTL and TTL BPDs, respectively. However, the insertion losses S12 = S14 and S13 are around −6 ± 1.5 dB and – 3 ± 1.3 dB, respectively for both dividers. In this study, simulations are carried out using High-Frequency Structure Simulator (HFSS) software. The evaluation of the proposed divider is obtained from the simulation and hardware measurements results.
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This article has been republished with minor changes. These changes do not impact the academic content of the article.
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Notes on contributors
Sahar Saleh
Sahar Saleh received her bachelor’s degree in electronics and communication engineering and MSc degree in Wireless Communications Engineering from Aden University, Yemen, and Yarmouk University, Jordan in 2010 and 2016, respectively. Her research work is mainly on Microwaves Engineering and Numerical Techniques in Electromagnetics. She started her career as a junior lecturer and laboratory technician at faculty of engineering at Aden University, Yemen in 2012. Currently, she is pursuing her Ph.D. study at Universisti Sains Malaysia in the field of microwave and satellite systems.
Widad Ismail
Widad Ismail (M’04) received the bachelor’s (Hons.) degree in electronics and communication engineering from the University of Huddersfield, UK, in 1999, and the Ph.D. degree (Active Integrated Antenna with Image Rejection) in electronics and communication engineering from the University of Birmingham, UK, in 2004. She is currently a Professor and a Project Coordinator with the AutoID Laboratory, Universiti Sains Malaysia. Her main areas of research are wireless system design, RFID, active integrated antennas, and RF and microwave systems engineering. She is a member of the Wireless World Research Forum.
Intan Sorfina Zainal Abidin
Intan Sorfina Zainal Abidin received her M.Eng in Electronics Engineering from University of Surrey, Guildford, UK in 2008. She then worked with Motorola Solutions (M), Penang, Malaysia as an Electrical Engineer for 2 years before moving to Celestica (M), Kulim, Malaysia to work as a Product Engineer. In 2013, she returned to University of Surrey for her PhD under the 5G Innovation Centre (5GIC) in Institute of Communication System (ICS). She received her PhD in 2017 and proceed to work as a Senior Lecturer at School of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), specializing in Electronics Communication System, Antenna, Channel Propagation, RF, Microwave Engineering and MIMO system. Intan is a member of IEEE.
Mohd Haizal Jamaluddin
Mohd Haizal Jamaluddin received bachelor's and master's degrees in electrical engineering from Universiti Teknologi Malaysia, Malaysia, in 2003 and 2006, respectively, and the Ph.D. degree in signal processing and telecommunications from the Université de Rennes 1, France, in 2009, with a focus on microwave communication systems and specially antennas such as dielectric resonator and reflectarray and dielectric dome antennas. He is currently an Associate Professor with the Wireless Communication Centre, Faculty of Electrical Engineering, Universiti Teknologi Malaysia. His research interests include dielectric resonator antennas, printed microstrip antennas, MIMO antennas and DRA reflectarray antennas. He has published more than 25 papers in reputed indexed journals and conference proceedings.
Samir A. Al-Gailani
Samir A. Al-Gailani started his career as senior lecturer at Higher Technical institute for applied B.Sc. degree Aden Yemen in 1992. He obtained his PhD in the field of optoelectronics from Universiti Technologi Malaysia (UTM) in 2014 with best student award and since then has been given various responsibilities including teaching, postdoctoral fellow, supervising laboratory sessions, supervising post-graduate students and undergraduate students, academic advisor, head of laboratory, head of research group, chairman and member of different committees, conducting short courses and training, He authored 20 ISI papers and has an H-Index of 7 and total citations of 212, presented more than 20 papers in reputed refereed conferences. He also successfully supervised 9 undergraduate students.
Asem S. Alzoubi
Asem S. Alzoubi received his B.Sc. degree Electrical Engineering from Eastern Mediterranean University, Cyprus in 1993, the M.Sc. degree in Electrical Engineering from Jordan University of Science and Technology, Jordan in 1998, and the Ph.D. degree in Electrical Engineering from the University of Mississippi, USA, in 2008. Currently, he is an Associate Professor with the Department of Telecommunications Engineering in Yarmouk University, Jordan.
From October 1999 to October 2000 he worked as a lab. supervisor in Princess Sumaya University for Technology (PSUT), Jordan. From October 2000 to January 2004 he worked as a lecturer in the Telecommunication Department at the Institute of Science for Telecom & Technology, Riyadh, Saudi Arabia. His current research interests include dielectric resonator antennas, microstrip antennas and numerical methods in electromagnetics. Mr. Alzoubi is a member of the IEEE.
Mohammed H. Bataineh
Mohammed H. Bataineh was born and grew up in Irbid, north of Jordan. He received his Ph.D. in Telecommunication Engineering from Wales University, UK, in 1996. His M.S. and B.S. degrees were obtained in Electrical Engineering from Jordan University of Science and Technology (JUST) in 1993 and 1990, respectively. He was fortunate to work at Rutherford Appleton Laboratory (RAL) during his stay at the UK as a researcher. He has been a member of the Communications Engineering Department since 1996, where he is now a full professor. He chaired the Department from 2001-2004. He got a short-term scholarship from the German Academic Exchange Service (DAAD) during the summer of 2000 to conduct academic research in the area of inverse scattering at Mgdeburg University, Germany, and another from Rostock University (Germany) during the summer of 2001 to conduct academic research in the area of linear accelerators. He won the Hijjwai Prize for outstanding in Research, 2007. He spent a sabbatical leave at Jordan University of Science and Technology in the academic year 2005/2006. He held a teaching position at Electrical Engineering Department, Qassim University, KSA from 2010–2012. Prof. Bataineh's research has focused on various aspects of Telecommunications including antenna arrays, optical filters, and the application of perturbation methods to general periodic structures.