2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Bulk-Titanium Waveguide – a New Building Block for Microwave Planar Circuits

X.T. Huang, S. Todd, C. Ding, N.C. MacDonald
University of California at Santa Barbara, US

titanium, MEMS, waveguide, RF MEMS

We present a new topology for planar microwave transmission line: bulk titanium waveguide. The waveguide is formed by deep trench etching, dielectric gap filling, and planarization. The high aspect ratio of the resulting structure provide superior field confinement, low crosstalk, therefore a small footprint. We have successfully demonstrated waveguides with propagation loss of 0.7dB/mm at 40GHz. To enable bulk titanium as a substrate compatible with microfabrication, we developed a suite of techniques that overcome unique manufacturing issues associated with titanium.

Nanotech 2008 Conference Program Abstract