WAAS Space Segment Antenna Based on EBG Superstrate Gain Enhancement Technique

Konferenz: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
23.03.2009 - 27.03.2009 in Berlin, Germany

Tagungsband: EuCAP 2009

Seiten: 5Sprache: EnglischTyp: PDF

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Brand, Yan; Cassivi, Yves; Fourmault, A.; Demers, Yves (MDA Inc. Space Mission, Montréal, Canada, H9X 3R2)
Iriarte, Juan-Carlos; Ederra, Inigo; Gonzalo, Ramon (Electrical and Electronic Engineering Department of the Public University of Navarra, Campus Arrosadia, 31006, Pamplona, Spain)
Salgetti-Drioli, Luca; Maagt, Peter de (Electromagnetics & Space Environments Division European Space Agency TEC-EE, PO Box 299, NL 2200 AG, Noordwijk, The Netherlands)

RF and mechanical design considerations for Wide Area Augmentation Service (WAAS) space segment antennas based on the use of an Electromagnetic Band Gap (EBG) superstrate are discussed. This novel antenna configuration has many attractive features such as compactness, low mass and reduced complexity. Two EBG WAAS antenna configurations, one with an array of circular patches and the second one with an array of helices are presented and discussed. Minimum gain and phase center stability specifications determine the array size and the quality factor of the EBG superstrate that can be used in this application. Simulation and measurement results are in good agreement and demonstrate that an EBG antenna concept can meet the requirements of the WAAS antenna application Thermo-mechanical distortion and multipactor margin for the helix array antenna, which are important factors for space qualification of the antenna, are also considered.