Title :
A 110 GHz ozone radiometer with a cryogenic planar Schottky mixer
Author :
Koistinen, Olli P. ; Valmu, Heikki T. ; Räisänen, Antti ; Vdovin, Vjacheslav F. ; Dryagin, Y.A. ; Lapkin, Igor V.
Author_Institution :
Helsinki Univ. of Technol., Espoo, Finland
fDate :
12/1/1993 12:00:00 AM
Abstract :
A total power radiometer for monitoring the stratospheric ozone spectral line at 110 GHz is presented. Special features such as a cooled planar Schottky mixer as the front end and efficient reduction of standing waves in the quasi-optics are discussed in detail. The noise temperature of the receiver is 530 K (single sideband), and the total bandwidth of the receiver is 1 GHz. A dual acoustooptical spectrometer is used for the signal detection
Keywords :
atmospheric measuring apparatus; calibration; microwave measurement; mixers (circuits); ozone; radiometers; solid-state microwave circuits; 1 GHz; 110 GHz; MM-wave radiometer; O3; O3 spectral line; cryogenic planar Schottky mixer; dual acoustooptical spectrometer; ozone radiometer; quasi-optics; signal detection; stratospheric ozone spectral line; total power radiometer; Amplitude modulation; Calibration; Cryogenics; Electromagnetic wave absorption; Feeds; Filters; Frequency; Monitoring; Radiometry; Temperature;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
