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 Analysis and Characterization of Uniplanar Structures for Material Characterization

Graduate Researcher: Can Eyup Akgun

     As integrated circuit technologies continue to increase, there is a desire to extract the electrical properties of materials.  Resonator structures have offered a useful means for acquiring these material properties.  Conventional microstrip topologies have produced accurate characterization up to 40 GHz.   In hybrid circuits, Coplanar Waveguide (CPW) topologies have become another option to the conventional microstrip topologies in microwave integrated circuits (MICs) and monolithic microwave integrated circuits (MMICs). Coplanar Waveguide designs offer lower substrate height dependence and less sensitivity to impedance changes, thus, presenting a more consistent extraction method for extracting dielectric property information.  As a result, CPW planar resonators are investigated to determine wideband material properties, such as attenuation and dielectric constant.

     A variety of CPW resonators are being investigated theoretically and experimentally for “T” and ring-resonator designs.  In “T” resonator designs, various configurations and terminations are studied to minimize edge coupling and suppress higher order modes.  Ring-resonator designs are investigated to reduce open end and curvature effects. Feeding architectures are also being evaluated to optimize signal coupling with minimum loading. 

1/2003

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