Millimeter Wave Applications of Large Aperture Systems
Abstract
This study proposes a structural design for the millimeter wave (MMW) antenna concept offered by Aerojet/NTL. It performs an assessment of the structural behavior of the satellite as it proceeds along its 500 km orbit. This effort concentrated on the definition and quantification of critical disturbances expected in the orbital environment. The design of a thermal blanket is arrived at through a number of thermal model analyses. The modeling of structural components and substructuring approaches are presented. The responses are evaluated for thermal loadings and dynamic disturbances. Based on the antenna deformational state, the performance is evaluated in term of point- spread functions (antenna loss of gain) and line-of-sight errors. A packaging and deployment technique is suggested for the surface panels, the back-up trusses and the feed tower to fit into the cargo bay of a single shuttle. Although the satellite is relatively heavy at 8800 kg, it is expected to perform satisfactorily in an almost completely passive manner. The evaluation of orbital dynamics shows the need for substantial propellant (2000 kg) to maintain the 500 km orbit.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1980
- Accession Number
- ADA082990
Entities
People
- Francois Ayer
Organizations
- Charles Stark Draper Laboratory