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Reflector surface distortion analysis techniques (thermal distortion analysis of antennas in space)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Giriunas, J. Steinbach, R. Heighway, J. Sharp, R. Lagin, A. Liao, M. |
| Copyright Year | 1989 |
| Description | A group of large computer programs are used to predict the farfield antenna pattern of reflector antennas in the thermal environment of space. Thermal Radiation Analysis Systems (TRASYS) is a thermal radiation analyzer that interfaces with Systems Improved Numerical Differencing Analyzer (SINDA), a finite difference thermal analysis program. The programs linked together for this analysis can now be used to predict antenna performance in the constantly changing space environment. They can be used for very complex spacecraft and antenna geometries. Performance degradation caused by methods of antenna reflector construction and materials selection are also taken into consideration. However, the principal advantage of using this program linkage is to account for distortions caused by the thermal environment of space and the hygroscopic effects of the dry-out of graphite/epoxy materials after the antenna is placed into orbit. The results of this type of analysis could ultimately be used to predict antenna reflector shape versus orbital position. A phased array antenna distortion compensation system could then use this data to make RF phase front corrections. That is, the phase front could be adjusted to account for the distortions in the antenna feed and reflector geometry for a particular orbital position. |
| File Size | 1296832 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900009951 |
| Archival Resource Key | ark:/13960/t6sz16f79 |
| Language | English |
| Publisher Date | 1989-07-01 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Linkages Surface Distortion Aerospace Environments Reflector Antennas Spacecraft Antennas Computer Programs Phased Arrays Degradation Reflectors Thermal Environments Antenna Design Finite Difference Theory Antenna Feeds Graphite-epoxy Composites Thermal Analysis Antenna Arrays Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
