A relatively simple numerical method is introduced to separate the electric conductivity from the effective (complex) permittivity. The latter is often the outcome of measurements of the electric properties of a material. The method includes a numerical evaluation of the Kramers-Kronig transform integrals also known as Hilbert transform. Exemplarily it is applied to extract the conductivity from measured data found in the literature describing the effective permittivity of composite material.

The current work presents a structure that can be used in magnetically coupled bi-directional data transfer structures. It allows for high-speed data transfer with high decoupling between both data channels and thus provides a highly reliable data link. The principal used to achieve the decoupling is the cancellation of magnetic fields generated by one part of the structure in the other part and vice versa. Three dimensional field simulations and measurements at a prototype were conducted.

This paper deals with the propagation of electromagnetic waves in cylindrical waveguides with irregularly deformed cross-sections. Waveguides are of high interest because of its practical use as a transmission medium. Schelkunoff's method, is a semi-analytical method for computing electromagnetic waves in hollow and cylindrical waveguides bounded by PEC walls. The aim of this paper is to derive the so-called GTE's for irregular deformed waveguides.