Comments on "a complete set of spatial domain dyadic Green's function components for cylindrically stratified media in fast computational form"



Ergül, Özgür Salih (Informa UK Limited, 2010-01-01)
We consider the solution of electromagnetics problems involving perfectly conducting objects formulated with the electric-field integral equation (EFIE). Dense matrix equations obtained from the discretization of EFIE are solved iteratively by the generalized minimal residual (GMRES) algorithm accelerated with a parallel multilevel fast multipole algorithm. We show that the number of iterations is halved by transforming the original matrix equations into normal equations. This way, memory required for the G...
Multilevel fast multipole algorithm for the discrete dipole approximation
Koc, S; Chew, WC (Informa UK Limited, 2001-01-01)
The discrete dipole approximation, originally developed by Purcell and Pennypacker is a quite general method for solving scattering from irregularly shaped targets and/or a cluster of targets. Computationally, the method requires the solution of large dense systems of linear equations and various iterative methods have been employed in the literature for the purpose. In this work, the multi-level fast multipole algorithm is used to compute the matrix-vector product in the iterative methods. This algorithm h...
Electromagnetic optimization of corrugated metallic sheets for maximum power focusing
Altinoklu, Askin; Karaosmanoglu, Bariscan; Ergül, Özgür Salih (Informa UK Limited, 2017-01-01)
We present full-wave electromagnetic optimization of corrugated metallic sheets to achieve maximum power focusing at desired locations when illuminated by plane waves. The corrugations are freely applied by moving the discretization nodes, leading to huge optimization spaces that are scanned by employing genetic algorithms. The required simulations are performed accurately and efficiently via the method of moments or the multilevel fast multipole algorithm. Hundreds of thousands of simulations are performed...
Detailed investigation of electron transport, capture and, gain in Al0.3Ga0.7As/GaAs quantum well infrared photodetectors
Cellek, OO; Beşikci, Cengiz (IOP Publishing, 2004-02-01)
We present an investigation of Al0.3Ga0.7As/GaAs quantum well infrared photodetectors (QWIPs) through detailed ensemble Monte Carlo simulations. Both two-dimensional and three-dimensional electrons are simulated with realistically evaluated scattering rates. Transport of the excited electrons is accurately modelled including the reflections from well-barrier interfaces. The details incorporated into the simulator clarified some important phenomena, as well as verifying the previous predictions. Under large ...
Comments on "A different perspective on taper efficiency for array antennas"
Demir, S (Institute of Electrical and Electronics Engineers (IEEE), 2005-03-01)
For original paper, see Holzman (IEEE Trans. Antennas Propag., vol. 51, no.10, p.2963-7, 2003). The present author suggests that the equation given for taper efficiency in the paper by Holzman is misleading and discusses this point.
Citation Formats
R. Acar and M. G. Dural Ünver, “Comments on “a complete set of spatial domain dyadic Green’s function components for cylindrically stratified media in fast computational form”,” JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, pp. 1389–1394, 2004, Accessed: 00, 2020. [Online]. Available: