Tenders Are Invited For Transmit And Receive Dual Polarizationactive Antenna Based On Scalable Tile Assemblyfor Geostationary Satellites

Tenders are invited for Transmit and Receive Dual Polarizationactive Antenna Based on Scalable Tile Assemblyfor Geostationary Satellites (Artes at 5b.248) - Expro+ - Re-Issue Objective: The objective of this activity is to design, manufacture and test a scalable Ku- or Ka-band tile assembly enabling compact combined transmit and receive active antenna for satellites in geosynchronous orbit. This will include the development of a mechanical and thermal concept. Targeted Improvements: Reduction of the number of antennas at spacecraft level by a factor of 2. Description: There is a trend for telecommunication satellites in Geostationary Orbits to reduce the size of the platform whilst maintainingcapacity of the system. The accommodation of several active antennas in such reduced size platforms is becoming more challenging and the need for integrated transmit and receive phased array antennas is growing. The current feed chain solutions are often based onhollow or ridge waveguide technology which meet performance requirements but result in bulky implementations and therefore they arenot compatible for implementing transmit and receive in the same aperture while keeping both orthogonal polarisations. New ways of implementing RF components based on planar technologies have been previously studied but this technology is trading in insertion loss and RF bandwidth performance. New PCB based technology such as Air-Filled Surface Integrated Waveguide (AFSIW), gap-technology andadvanced manufacturing techniques have the potential to significantly reduce the volume with respect to the current state of the art, whilst maintaining good RF performance. Metamaterials, which are engineered materials with unique properties, are also a potential solution to reduce the volume of feed chain assemblies. This activity will develop in a concept of a dual polarised combined transmit and receive active antenna in Ku- or Ka-band. Trade-off studies of several antenna topology designs will be performed. Breadboarding of critical components of the feed chain will be carried out including the development of a low loss filtering solution. A breadboard of a tile assembly will be developed and tested. For the breadboard tile assembly off-the shelf high power amplifiers and lownoise amplifiers shall be baselined. Thermal and mechanical assessment and experimental tests of the tile-assembly will be carried to evaluate the performance of the developed active antenna. Read less Tender Link : https://esastar-publication-ext.sso.esa.int/ESATenderActions/filter/open

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