20, July 2018

ESA Open Invitation to Tender AO9493
Open Date: 18/07/2018
Closing Date: 08/10/2018 13:00:00

Status: ISSUED
Reference Nr.: 18.1ET.12
Prog. Ref.: Technology Developme
Budget Ref.: E/0901-01 – Technology Developme
Tender Type: C
Price Range: 200-500 KEURO
Products: Satellites & Probes / Payloads / Instruments / RF and microwave Instruments / Imaging Radars / Satellites & Probes / RF / Microwave Communication (Platform and Payloads) / Antennas – BB / Antenna Towers and/or Reflectors / Satellites & Probes / RF / Microwave Communication (Platform and Payloads) / Antennas – BB / Antenna mechanisms (Including control electronics)
Techology Domains: Electromagnetic Technologies and Techniques / Antennas / Reflector and Lens Antennas / Electromagnetic Technologies and Techniques / Antennas / Array Antennas and Standalone Radiators / Ground Station Systems and Networks / Ground Station System / Microwave and Optical Active/Passive Systems
Establishment: ESTEC
Directorate: Directorate of Tech, Eng. & Quality
Department: Electrical Engineering Department
Division: RF Payloads & Technology Division
Contract Officer: Ferreol, Audrey
Industrial Policy Measure: N/A – Not apply
Last Update Date: 18/07/2018
Update Reason: Tender issue

There is a strong interest to investigate antenna solutions for a high resolution SAR instrument with Along Track interferometry (ATI) and Ground Moving Target Indication (GMTI) capabilities. A high resolution SAR instrument with ATI/GMTI capabilities would strongly benefit from the reflect array concept. This is considered as an attractive antenna solution since it exhibits low weight, low cost and low stowage volume.For such a purpose, it is proposed to develop a passive reflectarray antenna with dual polarized elements that shall be designed such that 2 independent beams (one per polarization) are generated, i.e. one moderately broad beam and one pencil beam.The study consists in :- state of art survey and specifications for the reflectarray based antenna for high resolutionSAR instrument with ATI/GMTI capabilities- Trade-off study , design and analysis (RF structural) of a deployable Ka-band reflectarray antenna (ie. dual linearly polarized low loss reflectarray elements, stable reflectarray antenna structure, antenna deploymentsystem)- Manufacturing and test of critical elements- Development plan and roadmap

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