W-band radiometer system with switching front-end for multi-load calibration. - Ernst Weissbrodt; Ingmar Kallfass; Axel Hülsmann; Axel Tessmann; Arnulf Leuther; Hermann Massler; Oliver Ambacher (IGARSS, 2011)

Active load modules for W-band radiometer calibration. - Ernst Weissbrodt; Axel Tessmann; Michael Schlechtweg; Ingmar Kallfass; Oliver Ambacher (IGARSS, 2012)