@misc{Marterer, type = {Master Thesis}, author = {Marterer, Verena}, title = {A Characterisation of Motives and Barriers to Taking up Academic Study in the Field of Electrical Engineering}, address = {Regensburg}, doi = {10.35096/othr/pub-6255}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-62550}, school = {Ostbayerische Technische Hochschule Regensburg}, pages = {159}, abstract = {The problem description comes to the fore when the wide-ranging subject area of electrical engineering is combined and analyzed with different types of schools. It is becoming increasingly rare for elementary school children to come to grips with technology in the sense of recognizing functional interrelationships and understanding modes of action in the context of technical-practical confrontation. The picture at secondary schools is also rather sobering. Here, a strong focus on facts and knowledge and too little emphasis on modeling, application and problem solving lead to insufficient results in the cognitive area. In addition, a massive shortage of engineers and specialists with a technical and scientific orientation has been predicted for years and is being increasingly observed. The motivation of students in traditional lectures is decreasing and in general there is a decline of university students in technical subjects. These problems are not only known throughout Germany, but also internationally. Especially in developing countries, additional problems make technical education more difficult, regardless of the type of school. Therefore, this master thesis is evaluated in South Africa in order to consider as many influencing factors as possible. "Learning is experience. Everything else is simply information." - Methods and concepts developed in the thesis build upon this quote of Albert Einstein. Teaching methods are elaborated and applied for three different age groups and school types, depending on known influencing factors. The aim of this thesis is not to produce further findings in the sense of basic research, but to show ways in which the current situation can be steered in a different direction. It has been shown that technology lessons in elementary/secondary schools inspire interest in technical professions in the field of electrical engineering. Furthermore, the combination of frontal teaching, for a necessary theoretical background, together with student-active, action-oriented teaching shows advantages in terms of learning efficiency and an increase in performance levels for all three age groups. However, it could also be observed that factors such as social background, family influence and gender have partial effects on the promotion and education in the field of electrical engineering.}, language = {en} } @masterthesis{Marterer, type = {Bachelor Thesis}, author = {Marterer, Verena}, title = {Simulation der elektromagnetischen Eigenschaften von gestricktem Stoff}, address = {Regensburg}, doi = {10.35096/othr/pub-5760}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:898-opus4-57605}, school = {Ostbayerische Technische Hochschule Regensburg}, abstract = {Periodische Strukturen besitzen eine Reihe interessanter Eigenschaften, die sie unter anderem f{\"u}r den Einsatz im Bereich der Hochfrequenz- und Mikrowellentechnik attraktiv erscheinen lassen. In der vorliegenden Arbeit steht insbesondere deren Anwendung beim Entwurf gestrickter Stoffe, die auf metallischen F{\"a}den basieren, im Vordergrund. Es wird in diesem Zusammenhang zun{\"a}chst die vollst{\"a}ndige Modellierung der Struktur unter Verwendung von 3D-Elementen in repr{\"a}sentativen Elementarzellen durchgef{\"u}hrt. Innerhalb der Designumgebung von CST Studio Suite kann das analytische Elementarmodell von Leaf und Glaskin f{\"u}r die Einfaden-Maschenware implementiert werden. Abh{\"a}ngig von den variablen Faktoren beim Stricken bewegen sich die Kantenl{\"a}ngen der hier betrachteten Einheitszelle in der Gr{\"o}ßenordnung von 1 cm bis 2 cm. Bei der Analyse der elektromagnetischen Eigenschaften unter Verwendung eines Frequenzbereichsl{\"o}sers k{\"o}nnen somit die Streuparameter f{\"u}r Reflexion und Transmission in einem Frequenzbereich von 13 GHz bis 30 GHz ermittelt werden. Aus den 1D-Simulationsergebnissen werden Frequenzen sichtbar, bei denen Resonanzph{\"a}nomene auftreten. Die polarisationsabh{\"a}ngigen Strukturen weisen Abschirmwirkungen von 30 dB und mehr auf. Da das Resonanzverhalten mit den Oberfl{\"a}chenstr{\"o}men in Verbindung steht, wird die Oberfl{\"a}chenstromverteilung zeitgleich mit dem elektrischen Feld untersucht. Weiterhin wird den Wechselwirkungen zwischen den ver{\"a}nderlichen Strickparametern und den elektromagnetischen Spezifikationen wie Resonanzfrequenz, Bandbreite oder G{\"u}te Aufmerksamkeit geschenkt. Es wird deutlich, dass Optimierungsroutinen die M{\"o}glichkeit nahelegen, frequenzselektive gestrickte Strukturen f{\"u}r diverse Anwendungen maßzuschneidern.}, language = {de} } @article{MartererRadouchovaSoukupetal., author = {Marterer, Verena and Radouchov{\´a}, Michaela and Soukup, Radek and Hipp, Susanne and Blecha, Tom{\´a}š}, title = {Wearable textile antennas: investigation on material variants, fabrication methods, design and application}, series = {Fashion and Textiles}, volume = {11}, journal = {Fashion and Textiles}, publisher = {Springer Open}, doi = {10.1186/s40691-023-00369-1}, abstract = {With the ongoing miniaturization of wireless devices, the importance of wearable textiles in the antenna segment has increased significantly in recent years. Due to the widespread utilization of wireless body sensor networks for healthcare and ubiquitous applications, the design of wearable antennas offers the possibility of comprehensive monitoring, communication, and energy harvesting and storage. This article reviews a number of properties and benefits to realize comprehensive background information and application ideas for the development of lightweight, compact and low-cost wearable patch antennas. Furthermore, problems and challenges that arise are addressed. Since both electromagnetic and mechanical specifications must be fulfilled, textile and flexible antennas require an appropriate trade-off between materials, antenna topologies, and fabrication methods—depending on the intended application and environmental factors. This overview covers each of the above issues, highlighting research to date while correlating antenna topology, feeding techniques, textile materials, and contacting options for the defined application of wearable planar patch antennas.}, language = {en} } @inproceedings{MartererMuhrSoukupetal., author = {Marterer, Verena and Muhr, Franz-Xaver and Soukup, Radek and Hipp, Susanne and Blecha, Tom{\´a}š}, title = {Material Characterization Using Waveguide Measurement Technique for the Development of Textile Antennas}, series = {2025 19th European Conference on Antennas and Propagation (EuCAP), Stockholm, Sweden, 3/30/2025 - 4/4/2025}, booktitle = {2025 19th European Conference on Antennas and Propagation (EuCAP), Stockholm, Sweden, 3/30/2025 - 4/4/2025}, publisher = {IEEE}, isbn = {978-88-31299-10-7}, doi = {10.23919/EuCAP63536.2025.10999278}, pages = {1 -- 5}, abstract = {Significant advances in using conductive textiles have been made over the past two decades, particularly in knitted fabrics. The aim is to deepen understanding of how knitted structures, especially those with hybrid yarns containing fine conductive elements (microwires), interact with electromagnetic fields. To establish simulation models that align with subsequent measurements, it is crucial to determine the dielectric properties, specifically relative permittivity and loss tangent/conductivity. This research investigates whether knitted structures with hybrid yarns exhibit anisotropic permittivity, meaning different dielectric properties along orthogonal axes within the fabric plane. These properties were measured using a waveguide technique' whereby the structures were rotated by 90° to observe changes. The results demonstrate that the knitted structure exhibits metallic-like reflective behavior in one direction, while rotation leads to dielectric material characteristics. This effect is influenced by the number of conductive microwires and the materials used for these wires, such as silver-plated copper or bronze.}, language = {en} }