Title :
Low 1/f Noise 30 GHz Broadband Amplifiers for the Differential Radiometers of the Planck Surveyor Mission.
Author :
Artal, E. ; Aja, B. ; De la Fuente, M.L. ; Palacios, C. ; Mediavilla, A. ; Pascual, J.P. ; Portilla, J.
Author_Institution :
Departamento de IngenierÃ\xada de Comunicaciones, ETSI Telecomunicación, Universidad de Cantabria, Avenida de los Castros s.n., 39005 Santander, Spain. artal@dicom.unican.es
Abstract :
A radiometer Back End Module based on broadband low noise amplifiers and band pass filters is presented. Low noise amplifiers are multistage HEMT MMIC chips. A 20% of bandwidth at 30 GHz have been achieved. The passband is fixed by coupled lines microstrip filters. A complete module containing two identical branches of amplification and filtering stages with a gain greater than 30 dB has been developed. The low 1/f noise behavior of gain fluctuations allows the module to be used as the Back End Module for the differential radiometers in the European Scientific mission Planck. Details of the MMIC chips and filters assembly as well as experimental results are included.
Keywords :
Band pass filters; Bandwidth; Broadband amplifiers; Filtering; HEMTs; Low-noise amplifiers; MMICs; Microstrip filters; Passband; Radiometers;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.338967
