ALMA SIS Mixer Optimization For Stable Operation

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1 Introduction - NRAO

The frontend for the ALMA project comprises ten frequency bands, among which band 7 (275-370 GHz), whose baseline specification is for a DSB, fixed-tuned mixer, with a maximum noise temperature of 5hvik (66 K at 275 GHz). Therefore, our first goal has been to develop a low-noise DSB mixer with stable operation over that band. A significant

ALMA SIS mixer optimizati on for stable operation

ALMA SIS mixer optimizati on for stable operation S. Asayama* a,b, N. Whyborn a,c, P. Yagoubov c aJoint ALMA Observatory Chile, Alonso de Cordova 3107, Vitacura, Santiago de Chile; bNational Astronomical Observatory of Japa n, 2-21-1 Osawa, Mitaka, Tokyo, Japan; cEuropean Southern Observatory, Karl-S chwarzschild-Str. 2, 85748 Garching, Germany