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|Author(s):||Joseph W. Britton; Ki W. Yoon; James A. Beall; Daniel T. Becker; Hsiao-Mei Cho; Gene C. Hilton; Michael D. Niemack; Kent D. Irwin;|
|Title:||Progress Toward Corrugated Feed Horn Arrays in Silicon|
|Published:||December 16, 2009|
|Abstract:||We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold coated stacks of micromachined silicon wafers. As a first step, Au coated Si waveguides with a circular, corrugated cross section were fabricated; their attenuation was measured to be <0.15 from dB/cm 80 to 110 GHz at room temperature. To ease the manufacture of horn arrays, electrolytic deposition of Au on degenerate Si without a metal seed layer was demonstrated. An apparatus for measuring the radiation pattern, optical efficiency, and spectral band pass of prototype horns is described. Feed horn arrays made of silicon may find use in polarization anisotropy measurements of the cosmic microwave background radiation.|
|Conference:||Low Temperature Devices 13|
|Pages:||pp. 375 - 378|
|Location:||Palo Alto, CA|
|Dates:||July 20-24, 2009|
|Keywords:||mm-wave optics, cryoelectronics, experimental cosmology, optics|
|Research Areas:||Physics, Optics, Optical Physics, Electromagnetics|
|PDF version:||Click here to retrieve PDF version of paper (257KB)|