The design, construction and measurement of a quasi-optical multiplexer and antenna for space-borne atmospheric measurements from 56 to 425 GHz

We have developed a low-loss quasi-optical multiplexer (QOM) for future space-based meteorological radiometry covering nearly a decade of frequencies - from 54 GHz to 425 GHz. We have shown that very low loss can be combined with high channel co-alignment in a compact package, suitable for surviving...

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Bibliographic Details
Main Authors: Wylde, Richard J., Ade, Peter A., Froud, Stuart, Hanham, Stephen M., Hornsby, Amber, Lifei Jiang, Otter, William J., Pike, Kevin, Tucker, Carole, Woodcraft, Adam, Zhenchao Xie, Hongxin Xu
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Antennas
Atmospheric measurements
Atmospherics
Beams (radiation)
Channels
Detectors
Extraterrestrial measurements
Frequency measurement
Horns
Launches
Loss measurement
Mirrors
Multiplexing
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Summary:We have developed a low-loss quasi-optical multiplexer (QOM) for future space-based meteorological radiometry covering nearly a decade of frequencies - from 54 GHz to 425 GHz. We have shown that very low loss can be combined with high channel co-alignment in a compact package, suitable for surviving the launch environment. The QOM uses shallow angle low-loss dichroic plates (DCP's) allowing polarization diversity and ultra-Gaussian horn feeds to minimize both component size and standing waves. The losses in the multiplexer were measured using a novel double path S 11 VNA technique, and beam co-alignment was verified by scanning with a wideband detector.
ISSN:2162-2027
2162-2035
DOI:10.1109/IRMMW-THz.2015.7327604