Title :
Design of a side-band-separating heterodyne mixer for band 9 of ALMA
Author :
Baryshev, A.M. ; Kooi, J. ; Mena, F.P. ; Lodewijk, C.F.J. ; Wild, W.
Author_Institution :
Space Res. Organ. of The Netherlands & Kapteyn Inst., Groningen Univ., Netherlands
Abstract :
A side-band-separating (SBS) heterodyne mixer has been designed for the Atacama large millimeter array (ALMA) 602-720 GHz band, as it presents a great improvement over the current double-side-band configuration under development at the moment. Here we present design details and the results of extensive computer simulations of its performance. The designed SBS mixer exploits waveguide technology. At its core it consists of a quadrature hybrid, two LO injectors, and three dumping loads. The entire structure has been analyzed in a linear circuit simulator with custom code written to accurately (verified by HFSS finite element simulations) model the hybrid structures. This technique permitted an optimization of the dimensions and the study of the consequences of deviations from the ideal situation. It is estimated that the tolerances in several of the components should be kept at less than 3 μm.
Keywords :
circuit optimisation; circuit simulation; finite element analysis; integrated circuit design; submillimetre wave integrated circuits; submillimetre wave mixers; 602 to 720 GHz; Atacama large millimeter array; double-side-band configuration; finite element simulations; heterodyne mixer; hybrid structures; linear circuit simulator; side-band-separating mixer; Analytical models; Circuit simulation; Computational modeling; Computer simulation; Finite element methods; Linear circuits; Millimeter wave technology; Radio frequency; Space technology; Waveguide junctions;
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.2005.1572613
