https://orcid.org/0000-0002-5641-4128
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Abstract
The paper presents a miniaturized diplexer based on a half mode substrate integrated waveguide (HMSIW) loaded with a novel metamaterial unit cell. The proposed diplexer is implemented by cascading two HMSIW bandpass filters loaded with modified circular complementary split-ring resonators (MC-CSRRs) operating at distinct frequencies. The working principle behind the operation of diplexer is the theory of evanescent mode propagation that aids in the miniaturization of the diplexer in addition to the 50 % size reduction contributed by the HMSIW. The performance of the diplexer is investigated by varying the substrate thickness and substrate material. To authenticate the proposed idea, the diplexer operating at 3.5/5.8 GHz is designed using the full-wave simulator, fabricated and experimentally measured. The proposed diplexer yields the advantages of low insertion loss, smaller footprint, reasonable isolation and individual control of operating frequencies. A second-order diplexer is designed and simulated that results in improved isolation and selectivity.
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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
D. Tharani
Tharani Duraisamy pursued her B.E. degree in Electronics and Communication Engineering from J.J. College of Engineering and Technology Tiruchirappalli, India in 2010. She completed her M.E. degree in Communication Systems from Saranathan College of Engineering, Tiruchirappalli, India in 2013. Later she joined as an Assistant Professor in Mookambigai College of Engineering, Pudukottai. In 2017, she started her research career as a Research Scholar in the Department of Electronics and Communication Engineering at the Indian Institute of Information Technology, Kancheepuram, India. Her research interest includes the design of SIW passive components such as power dividers, filters and diplexers. She is a student member of IEEE and IEEE MTT-S.
K. Selvajyothi
Selvajyothi Kamakshy studied at Thangal Kunju Musaliar College of Engineering, Kollam, India and received the B. Tech degree (1995) in Electrical and Electronics Engineering from Kerala University, India. Received M.E degree (2004) in Power Electronics and Industrial Drives from Sathyabama Institute of Science and Technology, Chennai, India. She received a Ph.D degree in Electrical Engineering from the Indian Institute of Technology, Madras in 2009. Currently, she is an Assistant Professor in Electrical Engineering, Indian Institute of Information Technology Design and Manufacturing, Kancheepuram, India. She has 18 years of teaching experience including 11 years of research. Her areas of interest are Control and Instrumentation Engineering, Electric vehicles, Medical instrumentation, Power Electronics and control. Dr. Selvajyothi is a Life member of ISTE (Indian Society for Technical Education). She is a member of IEEE, IIIS (International Institute of Informatics and Systemics) and SAEINDIA.
S. S. Karthikeyan
Karthikeyan Sholampettai Subramanian received a Ph.D. degree from IIT Guwahati, India, in 2011. He has 13 years of educational activity and research experience in the area of RF and microwave. He was the Short-Term academic foreign visit U.K and France. He is currently an Assistant Professor with the Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli, India. He has authored or co-authored more than 100 scientific research papers and technical reports. His current research interests include microwave integrated circuits, biological effects of microwaves, computer-aided design of MICS, metamaterials/frequency selective surfaces (FSSs), fractal antennas, MIC antennas, metamaterial antennas, and substrate-integrated waveguides. Dr. Karthikeyan is a Chair of the IEEE-APS Society Madras chapter. He is a member of the IEEE, IEEE MTT-S, and IEEE AP-S. He is a Life Member of the ISTE.
R. K. Barik
Rusan Kumar Barik received the B.Tech degree in Electronics & Communication Engineering from Biju Patnaik University of Technology, Rourkela, India in 2012, M.Tech degree in Communication Systems Design and a Ph.D. degree in Electronics Engineering from Indian Institute of Information Technology, Chennai, Tamil Nadu, India in 2015 and 2018, respectively. He joined the Department of Electronic & Communication Engineering, Christ University Bangalore, India, as an assistant professor in 2018. He completed his Post-Doc from the Southern University of Science and Technology, Shenzhen, China. He is currently a Post-Doctoral Researcher with the Engineering Optimization and Modeling Center, Reykjavik University, Iceland. His research interests include multiband microwave passive devices, multiband antennas, and SIW components.
Q. S. Cheng
Qingsha S. Cheng received the B.Eng. and M.Eng. degrees from Chongqing University, Chongqing, China, in 1995 and 1998, respectively, and the Ph.D. degree from McMaster University, Hamilton, ON, Canada, in 2004. In 1998, he joined the Department of Computer Science and Technology, Peking University, Beijing, China. In 1999, he joined the Department of Electrical and Computer Engineering, McMaster University, where he worked as a postdoctoral fellow, a research associate, and a research engineer. He is currently an Assistant Professor with the Department of Electrical and Electric Engineering, Southern University of Science and Technology, Shenzhen, China. His research interests include surrogate modeling, CAD, modeling of microwave circuits, software design technology, and methodologies for microwave CAD.