KADĚRA, P. 3D TIŠTĚNÉ UMĚLÉ MATERIÁLY PRO MIKROVLNNÉ STRUKTURY [online]. Brno: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. 2023.
The dissertation thesis submitted by Petr Kadera is focused on 3D printed artificial electromagnetic structures exploitable for antenna and microwave component design. In my opinion, the main original results of the dissertation thesis are: - The derivation of closed-form equations for effective relative permittivity determination of an artificial dielectric substrate based on a cross unit cell that outperforms conventional effective medium approximations in the wide inclusions volume fraction range. - The determination of the effective relative permittivity and permeability of a self-supporting unit cell by the multi-modal transfer matrix method. - The description of the influence of the finite conductivity of the inclusions on the effective constitutive parameters. - The investigation and development of several lenses with spatial distribution of the effective permittivity for retroreflective and frequency-coded retroreflective structures allowing wider angular coverage and stable RCS. The dissertation thesis is based on four scientific journal papers (2 x IEEE Access, 1 x Radioengineering, 1 x International Journal of Microwave and Wireless Technologies) and four conference papers which also proves its originality. Petr was engaged in educational activities at the university as well: - He supervised 1 bachelor thesis focused on 3D printed antenna. - He contributed to teaching and updating laboratory exercises of courses focused on antennas and electromagnetic compatibility. In my opinion, Petr Kadera meets all requirements on a PhD candidate. I therefore fully recommend his dissertation thesis for the defence.
viz pdf
viz pdf
eVSKP id 148709