G. Kiziltas; "Design and Fabrication of Artificially Engineered..."

DESIGN AND FABRICATION OF ARTIFICIALLY ENGINEERED MATERIAL COMPOSITES FOR ELECTROMAGNETIC SYSTEMS

Güllü Kızıltaş

While
the number of advanced devices designed for the wireless communication
industry increases significantly, their sophistication
in terms of technology, level of integration, and miniaturization
increases as well. Concurrently, cost, size, and performance
expectations become more and more stringent, necessitating advanced
system architectures, “new” materials and versatile design optimization
procedures. The capability to manipulate the distribution of properties
within the dielectric materials in an automated way is critical to
enable dramatic improvements in antenna performance, and to overcome
traditional design trade-offs between efficiency, bandwidth, and
miniaturization. These concepts have not been addressed earlier in the
electromagnetic (EM) community due to a plethora of barriers that have
made these concepts unfeasible in the past. In this research, the
challenges of system design are addressed from an interdisciplinary
engineering perspective, with a focus on using automated design tools
(such as topology optimization) and artificially engineered composite
materials. Specifically, a design framework was developed using the
concepts of topology optimization, rigorous analysis models,
high-contrast dielectric materials and sophisticated millimeter-and
micro-scale fabrication of ceramics, polymers, and other materials to
create “novel” EM devices. This allowed us, for the first time, to
develop full three-dimensional volumetric material textures and printed
conductor topologies to enhance the performance of various RF
components such as filters and patch antennas. Design and fabrication
technologies, presented in this research, based on basic capabilities
of using engineered materials and systems, when applied correctly, will
dramatically shift the face of multidisciplinary engineering design.

Dr. Gullu KIZILTAS
completed her B. S. and M. S. degrees in Mechanical Engineering at the
Middle East Technical University, Ankara, Turkey, in 1995 and 1998,
respectively. She was awarded a Doctoral Fellowship by the Mechanical
Engineering Department at the University of Michigan in September 1998,
when she joined the Computational Mechanics Laboratory. During her PhD,
she worked on extending topology optimization design methods to high
frequency electromagnetic applications and the design, analysis and
characterization of artificially engineered materials for Radio
Frequency (RF) applications. In May 2003, she completed her PhD degree
in Mechanical Engineering at the University of Michigan. Currently she
is a Post Doctoral Researcher at both the ElectroScience Laboratory at
Ohio State University and the University of Michigan. Her current
research interests are Finite Element Analysis (FEA) and design of
complex engineering systems. She also coordinates with the Ceramic
Research Group at the University of Michigan on the advanced
fabrication of dielectric composites. The applications areas of her
research focus are the design and fabrication of miniaturized
mechanical, electromechanical and biomedical devices.

January 5, 2005, 14:40, L048