Present and future R&T development in CNES for Microwave radiometer

The paper describes CNES R&T activities in terms of radiofrequency radiometric equipment. K and Ka band direct detection receivers developed with EADS Astrium use the UMS PH 25 foundry technology. Two applications on spatial microwave radiometers are shown. In the continuity of this action, activities are led on "LNA in front" receivers at 150 and 183 GHz. In parallel, activities on Schottky diode based receiver are led with Observatoire de Paris on MMIC integrated design