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

G. Castorina, G. Torrisi, G. Sorbello, L. Celona and A. Mostacci

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 8, 981-990

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.

Date: 2019
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DOI: 10.1080/09205071.2019.1583136

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