| タイトル | Design of an offset fed scanning antenna for the shuttle imaging microwave system |
| 本文（外部サイト） | http://hdl.handle.net/2060/19760015199 |
| 著者（英） | Gustincic, J. J. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech.|Gustincic (J. J.) Consulting Engineer |
| 発行日 | 1975-04-14 |
| 言語 | eng |
| 内容記述 | A design study is described for a mechanically scanned offset fed parabolic torus reflector antenna having a 4m x 2m aperture for simultaneous use at eleven frequency channels from UHF to millimeter wavelengths. A design for the antenna is presented utilizing dipole and horn feeds at the low frequencies and a Gregorian aberration correcting subreflector system for feeding the torus at the high frequencies. The results and details of a theroetical study based on geometrical optics performed to evaluate the high frequency design and the results of an experimental study involving a one-tenth scale model for evaluation of the low-frequency behavior are given. Beam efficiencies, antenna patterns, beamwidths and cross polarization levels are presented and these results demonstrate that the antenna concept is viable for the Shuttle Imaging Microwave System requirement. |
| NASA分類 | SPACECRAFT INSTRUMENTATION |
| レポートNO | 76N22287
TR070
NASA-CR-147166 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/186144 |
