Submillimeter-wave antennas on thin membranes |
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| Authors: | Gabriel M Rebeiz Wade G Regehr David B Rutledge Richard L Savage and Neville C Luhmann Jr |
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| Institution: | (1) Division of Engineering and Applied Science, California Institute of Technology, 91125 Pasadena, CA;(2) Department of Electrical Sciences, University of California, Los Angeles, 90024 Los Angeles, CA |
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| Abstract: | Submillimeter-wave antennas have been fabricated on 1- m thick silicon-oxynitride membranes. This approach results in better patterns than previous lens-coupled antennas, and eliminates the dielectric loss associated with the substrate lens. Measurements on a wideband log-periodic antenna at 700 GHz, 370 GHz and 167 GHz show no sidelobes and 3-dB beamwidths between 40° and 60°. A linear imaging array has similar patterns at 700 GHz. Possible applications for membrane antennas include wideband superconducting tunnel-junction receivers for radio astronomy and imaging arrays for radiometry and plasma diagnostics. |
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