**Acknowledgements**

This publication is supported by the European Union through the European Regional Development Fund (ERDF) and by the french region of Brittany, Ministry of *Metal 3D-Printing of Waveguide Components and Antennas: Guidelines and New Perspectives DOI: http://dx.doi.org/10.5772/intechopen.106690*

Higher Education and Research, Rennes Métropole and Conseil Départemental 35, through the CPER Project SOPHIE/STIC & Ondes, and also by the region of Brittany under grant SAD volet. Additional funding comes from the European Space Agency, the Centre National d'Études Spatiales, the companies Thales Alenia Space, Thales Group, and SWISSto12.
