Conductor losses calculation in two-dimensional simulations of H-plane rectangular waveguides

ABSTRACT

This paper presents a novel numerical approach to simulate H-plane rectangular-waveguide microwave circuits considering a reduced quasi-2D simulation domain with benefits for computational cost and time. With the aim to evaluate the attenuation of the full height 3D component, we propose a modified expression for the waveguide top/bottom wall conductivity. Numerical 2D simulations are validated against results from full wave 3-D commercial electromagnetic simulator. After a benchmark on a simple straight waveguide model, the method has been successfully applied to an asymmetric un-balanced power splitter, where an accurate power loss prediction is mandatory. Simulation time and memory consumption can be reduced by a factor ten and seven respectively, in comparison with complete 3D geometries. Finally, we show that, also for quasi-2D E-bend waveguide, a case where the translational H-plane symmetry is broken, the error on conductor losses computation is mitigated by our approach since the method remains still valid in a first approximation.

KEYWORDS:

• H-plane waveguide
• numerical simulation
• power divider
• attenuation
• conductor losses
• conductivity
• waveguide components
• rectangular waveguides

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

G. Castorina http://orcid.org/0000-0003-2967-0393

G. Torrisi http://orcid.org/0000-0002-2819-8800

G. Sorbello http://orcid.org/0000-0002-5081-3486

L. Celona http://orcid.org/0000-0002-6328-5926

A. Mostacci http://orcid.org/0000-0002-4407-7312

Additional information

Funding

This work was supported by INFN V National Committe under the DEMETRA grant.

Notes on contributors

G. Castorina

G. Castorina was born in Catania, Italy, in 1985. He received the Ph.D. in telecommunications engineering from the University of Catania, Catania, in 2018. He received a fellowship from INFN – LNF and Università degli Studi di Roma, “La Sapienza”. Currently he is employed as Senior RF Engineer in AVO-ADAM, a CERN spin-off company developing proton LINACs for cancer treatment.

G. Torrisi

G. Torrisi was born in Catania, Italy, in 1987. He received the M.S. Laurea degree (summa cum laude) in telecommunication engineering from the University of Catania (Catania, Italy) in 2011 and the Ph.D degree in information engineering from Università Mediterranea of Reggio Calabria (Reggio Calabria, Italy) in 2016. He is currently a temporary staff researcher of the Istituto Nazionale di Fisica Nucleare (INFN) at Laboratori Nazionali del Sud (LNS), Catania. His scientific activity is concerned with electromagnetic propagation in microwave generated plasmas produced by ion sources for particle accelerators.

G. Sorbello

G. Sorbello received the degree in Electronics Engineering cum laude at the University of Catania, Italy, in 1996, and the Ph.D. degree in Electronics and Communications Engineering at the Polytechnic Institute of Milan in 2000. In 2002 he became Assistant Professor of Electromagnetic Fields at University of Catania. Since 2014, he is Associate Professor of Electromagnetic fields at the Dipartimento di Ingegneria Elettrica, Elettronica e Informatica, University of Catania. His research interests include the study of single-mode solid-state waveguide lasers and amplifiers, integrated optics, the development of planar antennas and ultra-wideband compact antennas and antenna arrays, the study of microwave devices and computational electromagnetism with a special interest in RF-plasma interactions and particle accelerators.

L. Celona

L. Celona received the degree in Electronic Engineering at the University of Catania, in 1995 and he joined the Istituto Nazionale di Fisica Nucleare in 1996, at the Laboratori Nazionali del Sud, becoming Principal Technological Engineer in 2006 and Technology Research Director in 2019. His main field of activity covers all the aspects of the production of singly and highly charged beams together with their acceleration to increase the performances of Particles Accelerators for Nuclear and Applied Physics. Experienced in all the design stages of an ion source: from mechanical design and manufacturing through the installation and final commissioning, he is also active in research and development, proposing different innovative concepts concerning the role of microwaves in the development of ECR and microwave ion sources.

A. Mostacci

A. Mostacci received the degree in Electronics Engineering cum laude (1997) and the Ph.D. degree in Applied Electromagnetism and Electro-physical Sciences (2001) in Sapienza, University of Rome, Italy. Since 2018, he is Associate Professor of Experimental Physics at the Department of Basic and Applied Sciences for Engineering and he is managing the Accelerator Laboratory of his department. His research interest deal with electromagnetism applied to science and technology of particle accelerators: wakefield effects, design of beam manipulation RF devices (from 3 GHz to 12 GHz), microwave measurements. He is also involved in R&D of high brightness electron accelerators and novel plasma-based compact accelerators.