ISSTT Proceedings

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Near-Field Characterization of 2-D Beam Patterns of Submillimeter Superconducting Receivers

Authors:
Cheuk-yu. Edward Tong, Scott Paine, Raymond Blundell
Abstract:
In order to reap the maximum benefit from the low noise temperature of submillimeter superconducting receivers in submillimeter systems, it is important to optimize the illumination of the primary reflector by the receiver feed antennas. Therefore, we have developed a two-dimensional near-field measurement system which probes the beam pattern of submillimeter receiver feed antennas in situ, in both amplitude and phase. This system is basically an extension of well-established near-field techniques employed at microwave frequencies and is appropriate for probing paraxial beams where probe correction is not very important. The system has been used to about 500 GHz. The measured near-field data agree well with theoretical models. This system is currently used to characterize feed antennas developed for the Sub-Millimeter Array and is used as a tool in developing an SIS receiver with an integrated planar feed antenna.
Categories:
Components, Quasi Optics
Year:
1994
Session:
10
Full-text:
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Page Number(s):
660-673