درباره ما
NASA-LLIS-0407
Lessons Learned - Helios I Communication Link Degradation Due To Interferometer Effect and Spin Modulation From Spacecraft Antenna (~1972)
Year: 1996
Abstract: Abstract:
The composite pattern of two Helios I low-gain antenna elements caused an "interferometer effect", with rapidly varying phase and amplitude values occurring over a small but critical portion of the antenna pattern. Design of spacecraft antennas must include careful attention to amplitude and phase characteristics of the combined antenna system pattern, rather than to those of the individual elements alone.
The composite pattern of two Helios I low-gain antenna elements caused an "interferometer effect", with rapidly varying phase and amplitude values occurring over a small but critical portion of the antenna pattern. Design of spacecraft antennas must include careful attention to amplitude and phase characteristics of the combined antenna system pattern, rather than to those of the individual elements alone.
Subject: Communication Systems
Show full item record
| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:50:37Z | |
| date available | 2017-09-04T17:50:37Z | |
| date copyright | 06/24/1996 | |
| date issued | 1996 | |
| identifier other | EXBEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/173800 | |
| description abstract | Abstract: The composite pattern of two Helios I low-gain antenna elements caused an "interferometer effect", with rapidly varying phase and amplitude values occurring over a small but critical portion of the antenna pattern. Design of spacecraft antennas must include careful attention to amplitude and phase characteristics of the combined antenna system pattern, rather than to those of the individual elements alone. | |
| language | English | |
| title | NASA-LLIS-0407 | num |
| title | Lessons Learned - Helios I Communication Link Degradation Due To Interferometer Effect and Spin Modulation From Spacecraft Antenna (~1972) | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1996 | |
| contenttype | fulltext | |
| subject keywords | Communication Systems | |
| subject keywords | Flight Equipment | |
| subject keywords | Spacecraft |