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Item type:Publication, Access status: without files , Efficient Simulation of Substrate-Integrated Waveguide Antennas Using a Hybrid Boundary Element MethodThis paper presents a hybrid boundary element method for the efficient simulation of substrate-integrated waveguide (SIW) horn antennas. It is applicable with good accuracy to relatively thin structures with conventional circular ground vias. In the multiscale simulations, a 2-D contour integral method is used for the modeling of the fields inside the structure with numerous vias and a method of moments is used for the radiated fields outside. The contour integral method is extended in this paper by a new waveguide port of finite size based on the unit cell analysis of an SIW segment. Several SIW horn antennas are studied to validate the proposed method in terms of the input impedance, the field distribution on the aperture, and the radiation diagram. The proposed method shows good to reasonable accuracy and has a numerical efficiency which is about 2-3 orders higher than FEM-based full-wave simulations. It is therefore well suited for fast optimizations.Publicationtype: Journal Article281 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Multiscale Simulation of 2-D Photonic Crystal Structures Using a Contour Integral MethodThis paper presents a multiscale method for the numerically efficient electromagnetic analysis of two-dimensional (2-D) photonic and electromagnetic crystals. It is based on a contour integral method and a segmented analysis of more complex structures in terms of building blocks which are models for essential components. The scattering properties of essential photonic crystal components, such as waveguide sections, bends, and junctions, can be expressed independent of the electromagnetic wave launch parts which are used for the excitation by de-embedding of the network parameters. To enable this, the launch properties are extracted by a calibration technique using several calibration standards analog to a measurement. The de-embedding can be applied both to the proposed integral method and to the reference results from other full-wave methods. The extracted scattering parameters of the components can be used in a multiscale analysis for the efficient simulation of very large 2-D photonic and microwave structures with circular inclusions as the concatenation is performed only in terms of the network parameters. The proposed approach is about one to two orders of magnitude faster than the conventional unsegmented analysis with the contour integral method and several orders of magnitude faster than the full-wave reference method.Publicationtype: Journal Article395