Title :
The Band 3 receiver (84-116 GHz) for ALMA
Author :
Claude, S. ; Dindo, P. ; Erickson, D. ; Jiang, F. ; Yeung, K. ; Derdall, D. ; Duncan, D. ; Garcia, D. ; Henke, D. ; Leckie, B. ; Lichtenberger, A. ; Niranjanan, P. ; Pan, S.K. ; Pfleger, M. ; Rodrigues, G. ; Szeto, K. ; Welle, P. ; Caputa, K.
Author_Institution :
Herzberg Inst. of Astrophys., National Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
Test results are presented of the Band 3 module integrated into the Atacama large millimeter array (ALMA) front end receiver. The 84 to 116 GHz collected signal by the Band 3 receiver is split into two orthogonal polarisations using an orthomode transducer and then down-converted to 6 GHz over 4 GHz bandwidth using sideband separating mixers with better than 10 dB of image rejection. The single sideband system´s low noise of 35 to 45 K is achieved by cascading superconductor-insulator-superconductor (SIS) mixers and low noise cryogenic amplifiers that consist of three stage high mobility transistors (HEMT) operating at 4 K.
Keywords :
cryogenic electronics; high electron mobility transistors; low noise amplifiers; millimetre wave mixers; millimetre wave receivers; superconducting microwave devices; superconductor-insulator-superconductor mixers; 35 to 45 K; 4 K; 84 to 116 GHz; ALMA front end receiver; Atacama large millimeter array; Band 3 receiver module; high mobility transistors; image rejection; low noise cryogenic amplifiers; orthogonal polarisation; orthomode transducers; sideband separating mixers; single sideband system; superconductor-insulator-superconductor mixers; Antenna arrays; Bandwidth; Cryogenics; Low-noise amplifiers; Polarization; Radiofrequency amplifiers; Receivers; Superconducting device noise; Temperature sensors; Transducers;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572585
