O2-1 Investigation of the mutual coupling in a superconducting metamaterial structure at radiofrequencies, Melanie SCHIEMER, Thomas REUM and Hannes TOEPFER

The electric and magnetic coupling behavior along a superconducting metamaterial structure is discussed at radio frequencies. In this context, the derivation of physically interpretable equivalent circuit models, which encode the electromagnetic properties of that structure is of particular interest. Therefore, computational models are suitably implemented in HFSS™, Q3D Extractor^® and Circuit of ANSYS^® Electronics Desktop™ [1]. A good agreement between the results calculated by different approaches is achieved.

O2-2 Current distribution in an inhomogeneous massive hollow conductor influenced by a filament, Dragan FILIPOVIĆ and Tatijana DLABAČ

In this paper we present separate rigorous analyses of the skin and proximity effects in an inhomogeneous conductor in the presence of a filament. The conductor consists of a massive hollow circular conductor coated with a thin layer of different conductivity. The skin and proximity solutions are assumed in the form of two infinite sums of the proper harmonics. The unknown coefficients in the skin-effect case are found by applying boundary conditions, while a system of two integral equations is used to determine the unknown coefficients in the proximity-effect case, with no boundary conditions involved.

O2-3 Impact of low magnetic field on NBT stressed P-channel power VDMOSFETs, Nikola MITROVIĆ, Sandra VELJKOVIĆ and Danijel DANKOVIĆ

This paper presents research on the impact of low magnetic field on commercial IRF9520 p-channel power VDMOSFETs. Analyzed devices were previously subjected to the negative bias temperature stressing. Impact is seen through the change in the threshold voltage of the devices which is extracted from the transfer characteristics. Magnetic field introduces additional shift to the transfer characteristics. Samples, magnetic field and results are explained in the paper.

O2-4 Applicability of transmission line–based wave digital modelling framework, Biljana STOŠIĆ

In order to show possibilities of transmission line-based wave digital modelling technique, this paper examines different types of multiport devices. The paper presents a proof of concept demonstrating the efficient modeling technique without the use of the equivalent lumped-element circuit and with minimum modeling complexity. The concept shows that this technique produces a simple model and accomplishes the goals set by the user.