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A brief summary of direct solution approaches for finite element methods (FEM) in computational electromagnetics (CEM) is given along with an alternative direct solution based on domain decomposition (DD). Unlike recent trends in approximate/low-rank solvers, this work focuses on ‘numerically exact’ solution methods as they are more reliable for complex ‘real-life’ models. Preliminary studies on general...
This paper gives a birds eye view of the most recent algebraic acceleration and memory reduction techniques used in the finite element domain decomposition solution of electrodynamic boundary value problems arising in radiation, scattering and signal integrity applications. The presentation will focus on techniques that reliably deliver robust computational improvements and are resilient on plethora...
This paper presents a study of the accuracy of that FETI DDM with various choices of the Lagrange multiplier space and for conforming and non-conforming discretizations.
This paper presents the Planar Ultrawideband Modular Array (PUMA), a fully planar implementation of Wheeler's current sheet requiring no feed organizers or external baluns, that can be fabricated entirely using standard planar microwave circuit processes. This allows for low-cost aperture fabrication, high volume production and frequency scalability. The unique feed arrangement of PUMA allows for...
The design and optimization of high-frequency electronic systems such as antenna and microwave devices requires scanning and searching over various design parameter spaces that include frequency, material permittivity, permeability, or excitation (i.e., scan angles). Such sweeps require repeatedly solving the computational model (FEM or BEM) at various different parameter value combinations, leading...
Wavelength-scaled array architectures use scaled elements to achieve ultrawideband performance with significantly fewer overall radiators than traditional ultrawideband arrays based on a single element type. Compared to a conventional ultrawideband array with 8:1 bandwidth, a wavelength-scaled array that uses elements of three different sizes creates an aperture with fewer than 16% of the original...
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