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Research in millimeter wave techniques (1975)

Dees, J. W.

In: CASI

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Publication Date: 2019-06-27

Description: A model 180-GHz radiometer, employing a Cassegrain feed geometry with a parabolic main reflector and a subreflector fed by a corrugated conical horn, was constructed and tested. An absorber-coated chopper is used to modulate the signal, which is down-converted in a cross-guide harmonic mixer. A 100-GHz source was used to evaluate mixer performance and to optimize system parameters. Preliminary results indicate a noise figure of approximately 20 db is being achieved. Preliminary design studies and on-going research plans are discussed.

Keywords: COMMUNICATIONS AND RADAR

Type: A-1642 , NASA-CR-143140

Format: application/pdf

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