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Research in millimeter wave techniques (Document No: 19750019143)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dees, J. W. |
| Copyright Year | 1975 |
| 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. |
| File Size | 5832786 |
| Page Count | 49 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750019143 |
| Archival Resource Key | ark:/13960/t5v746r9j |
| Language | English |
| Publisher Date | 1975-06-27 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Radiometers Signal Mixing Electric Choppers Millimeter Waves Horns Subreflectors Cassegrain Antennas Parabolic Antennas Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
