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Published June 2005 | Published
Book Section - Chapter Open

A millimeter-wave diode-MMIC chipset for local oscillator generation in the ALMA telescope


A set of MMIC frequency multipliers and balanced mixers have been designed for the local oscillator system of the Atacama large millimeter array (ALMA). These millimeter-wave elements form a critical link in the active multiplier chains between the relatively low frequency microwave oscillators and the very high frequency submillimeter-wave, cooled multipliers of the LO subsystem. A complete chipset for four frequency bands is described, along with preliminary results on prototypes for two additional bands.

Additional Information

© 2005 IEEE. The authors wish to thank United Monolithic Semiconductors for fabrication of the Schottly Diode MMIC chips described in this paper. This work was carried out in part at the National Radio Astronomy Observatory, a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

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