Ioannis Koufogiannis

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This paper analyzes the microwave gas discharge within elliptical waveguides excited by the fundamental mode. The Rayleigh-Ritz method has been applied to solve the continuity equation. The eigenvalue problem defined by the breakdown condition has been sol ...

A complete and automatized strategy has been developed to derive the Vector and Scalar Potential Green’s Functions (GFs) of planar multilayered structures that include conductive sheets. The propagator matrix technique is enhanced to include conductive she ...

Highly accurate and efficient cubatures based on the double exponential quadrature rules are presented for the computation of weakly singular integrals arising in Galerkin mixed potential integral equation formulations. Due to their unique ability to handl ...

In recent years, there is a considerable and growing interest in developing fast integral equation methods for solving Maxwell’s equations. Volume integral equations are a versatile technique to model inhomogeneous scattering objects. Numerical tests show ...

This work focuses on Green Functions (GFs) of planar multilayered structures that may include arbitrary number of conductive sheets. The spectral domain GFs are derived through an automatized strategy based on the propagator matrix technique, while the spa ...

Ioannis Koufogiannis

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Microwave gas breakdown in elliptical waveguides

Mixed Potentials for Planar Multilayered Structures Including Conductive Interfaces

Considerations on double exponential-based cubatures for the computation of weakly singular Galerkin inner products

Volume Integral Equation Formulation for Medical Applications

The Mixed Potential Integral Equation for New Multilayered Structures Including Conductive Shee : Analytical and Numerical Techniques

Ionization Rates: a Comparative Study to Predict Corona Breakdown

Dyadic Green's functions of a graphene layer and their efficient calculation

On the development and evaluation of spatial domain Green Functions for multilayered structures with conductive sheets

Analysis of Corona Breakdown in Elliptical Waveguides

Real axis integration of Sommerfeld integrals with error estimation

Optimized machine precision double exponential quadratures applicable in weakly singular integrals

Extremely phase stable RF-cable for space applications

On the numerical evaluation of Green functions for structures with graphene layers