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Evolutionary Design of an X-Band Antenna for NASA's Space Technology 5 MissionWe present an evolved X-band antenna design and flight prototype currently on schedule to be deployed on NASA s Space Technology 5 spacecraft in 2004. The mission consists of three small satellites that wall take science measurements in Earth s magnetosphere. The antenna was evolved to meet a challenging set of mission requirements, most notably the combination of wide beamwidth for a circularly-polarized wave and wide bandwidth. Two genetic algorithms were used: one allowed branching an the antenna arms and the other did not. The highest performance antennas from both algorithms were fabricated and tested. A handdesigned antenna was produced by the contractor responsible for the design and build of the mission antennas. The hand-designed antenna is a quadrifilar helix, and we present performance data for comparison to the evolved antennas. As of this writing, one of our evolved antenna prototypes is undergoing flight qualification testing. If successful, the resulting antenna would represent the first evolved hardware in space, and the first deployed evolved antenna.
Document ID
20030067398
Document Type
Preprint (Draft being sent to journal)
Authors
Lohn, Jason D. (NASA Ames Research Center Moffett Field, CA, United States)
Hornby, Gregory S. (QSS Group, Inc. Moffett Field, CA, United States)
Rodriguez-Arroyo, Adan (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Linden, Derek S. (Linden Innovation Research Ashburn, VA)
Kraus, William F. (QSS Group, Inc. Moffett Field, CA, United States)
Seufert, Stephen E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2003
Subject Category
Spacecraft Design, Testing and Performance
Meeting Information
2003 NASA/DoD Conference on Evolvable Hardware
Distribution Limits
Public
Copyright
Public Use Permitted.

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