NASA-LLIS-0407
Lessons Learned - Helios I Communication Link Degradation Due To Interferometer Effect and Spin Modulation From Spacecraft Antenna (~1972)
active, Most Current
| Organization: | NASA |
| Publication Date: | 24 June 1996 |
| Status: | active |
| Page Count: | 3 |
scope:
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.
Document History
NASA-LLIS-0407
June 24, 1996
Lessons Learned - Helios I Communication Link Degradation Due To Interferometer Effect and Spin Modulation From Spacecraft Antenna (~1972)
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...
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