A SELF-DEPLOYING AND SELF-STABILIZING HELICAL ANTENNA FOR SMALL SATELLITES
Block, Joachim and Bäger, Annette and Behrens, Jörg and Delovski, Toni and Hauer, Lars-Christian and Schütze, Martin and Schütze, Rainer and Spröwitz, Tom (2010) A SELF-DEPLOYING AND SELF-STABILIZING HELICAL ANTENNA FOR SMALL SATELLITES. 61st International Astronautical Congress IAC, 27.09.2010 - 01.10.2010, Prag, CZ.
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Space antennas with a helical geometry are an advantageous choice for many applications, for instance if the transmission of electromagnetic waves with a circular polarization is intended, or if signals from terrestrial objects shall be received with a high angular resolution. In all these cases the desired electromagnetic properties of a helical geometry can be combined with the mechanical advantage that the antenna acts as a compression spring, provided that its core structure has the necessary high spring stiffness but can nevertheless easily be compressed. Such an antenna has been developed by DLR Institutes in Bremen and Braunschweig together with some industrial partners for a small satellite named AISat which shall be able to pursue the position of individual ships in critical sea areas in order to improve the security of seafare trade. The development was very challenging since the antenna must expand from a stowed stack length of only 10 centimeters to a total length of 4 meters. Only a special carbonfiber core under the conductive coating and a system of stabilizing cords led to a satisfying solution. Both the self-deployment and the self-stabilization function of this innovative antenna concept have been successfully tested and verified under zero-g-conditions in the course of a parabolic flight campaign. It could be convincingly demonstrated that the helical antenna can really achieve its desired contour in weightlessness within some seconds and maintain the required stability. Beyond the current application for the AISat satellite it is therefore a quite promising concept for future satellites.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||A SELF-DEPLOYING AND SELF-STABILIZING HELICAL ANTENNA FOR SMALL SATELLITES|
|In ISI Web of Science:||No|
|Keywords:||Helix Antenna, Deployment, Zero-G, Carbonfibers|
|Event Title:||61st International Astronautical Congress IAC|
|Event Location:||Prag, CZ|
|Event Type:||international Conference|
|Event Dates:||27.09.2010 - 01.10.2010|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W SY - Technik für Raumfahrtsysteme|
|DLR - Research area:||Space|
|DLR - Program:||W SY - Technik für Raumfahrtsysteme|
|DLR - Research theme (Project):||W - Entfaltungstechnologie . Solar Sail (old)|
|Institutes and Institutions:||Institute of Composite Structures and Adaptive Systems|
|Deposited By:||Doris Ries|
|Deposited On:||11 Nov 2010 11:56|
|Last Modified:||11 Nov 2010 11:56|
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