- Title Large antenna deployment
- Released 23/11/2016 9:06 am
- Copyright ESA–A. Ihle
- DescriptionA 5 m-diameter antenna, designed for orbital operations, seen after a test deployment. Large reflectors are increasingly required for telecommunications, science and Earth observation missions.“Up until now, European industry has not been able to field reflectors larger than 4 m in diameter, while the US, Japan and Russia are operating much larger reflectors in orbit,” says ESA’s Jean-Christophe Angevain.The challenge is to develop a reflector that can easily be stowed within the limited space available inside a launcher fairing and then opened to its full size while remaining sufficiently stable and accurate afterwards to meet strict performance requirements, including the use of high-frequency radio signals.“This reflector has a ‘double pantograph’ design to form a deployable ring,” adds ESA’s Alexander Ihle. “Once deployed, it tensions two opposing but connected parabolic nets, one on the top and one on the bottom.”The top netting supports and maintains a very finely knitted metallic mesh in a predefined shape, recounts Leri Datashvili of the company Large Space Structures GmbH: “This mesh is what will eventually reflect the radio signal – doing the real work of the reflector.”“Crucially, this design is also scalable, both in terms of the reflector diameter and moving up into higher frequencies,” says ESA’s Julian Santiago-Prowald.The deployment took about seven minutes to unfold automatically into its final configuration.This reflector was developed as part of an effort addressing a full large deployable antenna system through ESA’s Basic Technology Research Programme (TRP), by a consortium led by HPS GmbH in Germany, with Germany’s Large Space Structures being responsible for the reflector and its deployment.Another 5 m reflector also supported through TRP but based on carbon fibre reinforced silicone surface was tested in ESA’s Large Space Simulator thermal–vacuum chamber earlier this year.
- Id 369653
Guillermo Gonzalo Sánchez Achutegui
Inscríbete en el Foro del blog y participa : A Vuelo De Un Quinde - El Foro!