15 citations · 39 across the 6 of their papers we have counts for
6 papers
High-order implicit solver in conservative formulation for tokamak plasma transport equations
Andrei Ludvig-Osipov, Dmytro Yadykin, Pär Strand
An efficient numerical scheme for solving transport equations for tokamak plasmas within an integrated modelling framework is presented. The plasma transport equations are formulat…
Physical limitations of phased array antennas
Andrei Ludvig-Osipov, Jari-Matti Hannula, Patricia Naccachian +1
In this paper, the bounds on the Q-factor, a quantity inversely proportional to bandwidth, are derived and investigated for narrow-band phased array antennas. Arrays in free space…
Q-factor and bandwidth of periodic antenna arrays over ground plane
Andrei Ludvig-Osipov, B. L. G. Jonsson
In this paper, the Q-factor expression for periodic arrays over a ground plane is determined in terms of the electric current density within the array's unit cell. The expression a…
Stored energies and Q-factor of two-dimensionally periodic antenna arrays
Andrei Ludvig-Osipov, B. L. G. Jonsson
The Q-factor for lossless three-dimensional structures with two-dimensional periodicity is here derived in terms of the electric current density. The derivation in itself is shape-…
Fundamental bounds on transmission through periodically perforated metal screens with experimental validation
Andrei Ludvig-Osipov, Johan Lundgren, Casimir Ehrenborg +5
This paper presents a study of transmission through arrays of periodic sub-wavelength apertures. Fundamental limitations for this phenomenon are formulated as a sum rule, relating…
Evaluation of the Electric Polarizability for Planar Frequency Selective Arrays
Andrei Ludvig-Osipov, B. L. G. Jonsson
This paper presents a method to estimate the static electric polarizability of two-dimensional infinitely periodic metal patch arrays with dielectric substrate. The main features o…