| タイトル | Near-field testing of the 15-meter hoop-column antenna |
| 本文（外部サイト） | http://hdl.handle.net/2060/19890019179 |
| 著者（英） | Schroeder, Lyle C.; Adams, Richard R.; Belvin, W. Keith; Bailey, M. C.; Butler, David H.; Campbell, Thomas G. |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1989-08-01 |
| 言語 | eng |
| 内容記述 | A 15-m-diameter antenna was tested to verify that dimensional tolerances for acceptable performance could be achieved and to verify structural, electromagnetic, and mechanical performance predictions. This antenna utilized the hoop column structure, a gold plated molybdenum mesh reflector, and 96 control cables to adjust the reflector conformance with a paraboloid. The dimensional conformance of the antenna structure and surface was measured with metric camera and theodolites. Near field pattern data were used to assess the electromagnetic performance at five frequencies from 2.225 to 11.6 GHz. The reflector surface was adjusted to greatly improve electromagnetic performance with a finite element model and the surface measurements. Measurement results show that antenna surface figure and adjustments and electromagnetic patterns agree well with predictions. |
| NASA分類 | LAUNCH VEHICLES AND SPACE VEHICLES |
| レポートNO | 89N28550
NASA-TM-4073
L-16410
NAS 1.15:4073 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/140710 |
