A near-field alignment technique at millimeter and sub-millimeter wavelengths
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We have employed a portable near-field scanner operating at millimeter and sub-millimeter wavelengths to map the 2D amplitude and phase patterns of a radio beam. Combined with a numerical transform, we have developed a novel alignment procedure to diagnose the alignment error in a complex receiving system. The optics of a multiband, superconducting receiver have been aligned using this technique.
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