Premium
Numerical analysis of waveguide apertures radiating into lossy media
Author(s) -
Sibbald C. L.,
Stuchly S. S.,
Costache G. I.
Publication year - 1992
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.1660050407
Subject(s) - aperture (computer memory) , lossy compression , optics , waveguide , analyser , reflection coefficient , impedance matching , reflection (computer programming) , electrical impedance , finite element method , moment (physics) , materials science , acoustics , computer science , physics , engineering , electrical engineering , structural engineering , artificial intelligence , programming language , classical mechanics
Three numerical methods are applied to the analysis of a rectangular waveguide‐fed aperture radiating into a lossy media. A novel approach, the finite element method with an impedance boundary condition, and two established methods, the moment method and the mode‐matching method, are presented. The methods are compared with respect to accuracy, execution time, memory requirement, and versatility. Four aperture geometries are chosen for detailed study: the full aperture of the rectangular waveguide, and three reduced apertures. The reflection coefficient of the aperture in contact with five known dielectrics is calculated in the frequency range 8·5–11·5 GHz. The theoretical results are validated by measurements performed on an HP8510 network analyser.