28 citations · 86 across the 11 of their papers we have counts for
12 papers
Directivity Estimates and Tolerance Tradeoffs in the Presence of Random Perturbations
Kurt Schab, Lukas Jelinek, Miloslav Capek +1
The practicality of realizing high-directivity sources is studied using a generalized sensitivity metrics. These measures are based on the error model adopted in previous studies o…
Fundamental Limits of Characteristic Mode Slopes
Johan Lundgren, Mats Gustafsson
Characteristic Mode analysis is a widely used technique in antenna design, providing insight into the fundamental electromagnetic properties of radiating structures. In this paper,…
Characteristic Mode Analysis of Acoustic Scatterers
Lukas Jelinek, Kurt Schab, Viktor Hruska +2
The explicit connection between the transition matrix and boundary element method integral operators is formulated. This enables the calculation of characteristic modes via eigenva…
Radiation Efficiency and Gain Bounds for Microstrip Patch Antennas
Ben A. P. Nel, Anja K. Skrivervik, Mats Gustafsson
This paper presents radiation efficiency and gain bounds for microstrip patch antennas. The presented bounds are shown to be good predictors of antenna performance. Using the bound…
Theory and Computation of Substructure Characteristic Modes
Mats Gustafsson, Lukas Jelinek, Miloslav Capek +2
The problem of substructure characteristic modes is developed using a scattering matrix-based formulation, generalizing subregion characteristic mode decomposition to arbitrary com…
Characteristic Modes of Nonreciprocal Structures
Niklas Wingren, Daniel Sjöberg, Mats Gustafsson +4
The scattering formulation of characteristic mode decomposition is utilized to extend modal analysis to lossless scatterers breaking time-reversal symmetry. This enables characteri…
Characteristic Modes of Frequency-Selective Surfaces and Metasurfaces from S-parameter Data
Kurt Schab, Frederick Chen, Lukas Jelinek +3
Characteristic modes of arbitrary two-dimensional periodic systems are analyzed using scattering parameter data. This approach bypasses the need for periodic integral equations and…
Iterative Calculation of Characteristic Modes Using Arbitrary Full-wave Solvers
Johan Lundgren, Kurt Schab, Miloslav Capek +2
An iterative algorithm is adopted to construct approximate representations of matrices describing the scattering properties of arbitrary objects. The method is based on the implici…
Characteristic Mode Decomposition Using the Scattering Dyadic in Arbitrary Full-Wave Solvers
Miloslav Capek, Johan Lundgren, Mats Gustafsson +2
Characteristic modes are formulated using the scattering dyadic, which maps incident plane waves to scattered far fields generated by an object of arbitrary material composition. N…
Unified Theory of Characteristic Modes: Part II -- Tracking, Losses, and FEM Evaluation
Mats Gustafsson, Lukas Jelinek, Kurt Schab +1
This is the second component of a two-part paper dealing with a unification of characteristic mode decomposition. This second part addresses modal tracking and losses and presents…
Optimal Inverse Design Based on Memetic Algorithms -- Part 2: Examples and Properties
Miloslav Capek, Lukas Jelinek, Petr Kadlec +1
Optimal inverse design, including topology optimization and evaluation of fundamental bounds on performance, which was introduced in Part~1, is applied to various antenna design pr…
Optimal Inverse Design Based on Memetic Algorithms -- Part 1: Theory and Implementation
Miloslav Capek, Lukas Jelinek, Petr Kadlec +1
A memetic framework for optimal inverse design is proposed by combining a local gradient-based procedure and a robust global scheme. The procedure is based on method-of-moments mat…