Broadband millimeter wave receiver with dual polarization

Summary form only given, as follows. Receivers with broad frequency bandwidth and low noise provide improved sensitivity for millimeter wave remote sensing and astrophysical observations. For the study of the water cycle and rapidly evolving phenomena, such as hurricanes, the soundings of temperature and humidity profiles of atmosphere are achieved around the resonant frequencies of 118 GHz (oxygen) and 183 GHz (water) correspondingly. We developed a single horn receiver front end that covers these frequency bands.