Stange, T., W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society, W7-X ECRH Team at IGVP, & W7-X ECRH Team at KIT (2023). The quasi-optical ECRH system of Wendelstein 7-X. Talk presented at 16th International Reflectometry Workshop (IRW16). Greifswald. 2023-05-13 - 2023-05-16.