Mechanical investigation of a multi-layer reflectarray for Ku-band space antennas |
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| Institution: | 1. Institute of Lightweight Structures, Technische Universitaet Muenchen, 85747 Garching, Germany;2. Universidad Politécnica de Madrid, ETSI Telecomunicación, 28040 Madrid, Spain;3. Alcatel Alenia Space, 26, Av. J. F. Champollion, Toulouse, France;1. Department of Mechanics and Maritime Sciences, Chalmers University of Technology, Hörsalsvägen 7A, SE-412 96 Göteborg, Sweden;2. Volvo Car Corporation, SE-405 31 Göteborg, Sweden;1. EADS Innovation Works, System Engineering — Applied Mathematics, 12, rue Pasteur, Boîte postale 76, 92152 Suresnes Cedex, France;2. EDF R& D, Industrial Risk Management, 1, avenue du Général de Gaulle, 92141 Clamart Cedex, France;1. Department of Aeronautical and Vehicle Engineering, KTH Royal Institute of Technology, Stockholm, Sweden;2. Advanced Space Concepts Laboratory, University of Strathclyde, Glasgow, United Kingdom;1. Department of Electronics & Communication Engineering, School of ICT, Gautam Buddha University, Greater Noida, UttarPradesh 201 308, India;2. Department of Electronics & Communication Engineering, G.B. Pant Institute of Engineering & Technology, Pauri Garhwal, Uttarakhand, India |
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| Abstract: | A multi layer sandwich panel of printed reflectarray (RA) is a complex composition of many different materials enabling a required performance with exceptional properties. The major properties of a multilayer RA include the following: the use of array layers of reflective patches forming the flat structure gives the possibility to focus the electromagnetic waves; the use of more than one reflecting layer is widening the RF bandwidth; the possibility of having two different polarisations and two different contours of the beams.To achieve the mentioned properties, analytical and experimental investigations have been carried out. A sandwich panel for a three-layer printed reflectarray for dual polarisation with a different coverage in each polarisation has been designed, manufactured and tested. The measured radiation patterns of the RA show that gain requirements are fulfilled in a 10% bandwidth. Thickness and flatness accuracy requirements are also fulfilled. Low dissipative electric losses (0.35 dB) have been achieved, as a result of an appropriate mechanical design and selection of low-loss materials for the RA panel. |
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