15 July 2010 Development of MMIC receivers for cosmic microwave background interferometry
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Abstract
We report on the development of some of the key technologies that will be needed for a large-format Cosmic Microwave Background (CMB) interferometer with many hundreds of wideband W-band (75-110 GHz) receivers. A scalable threebaseline prototype interferometer is being assembled as a technology demonstration for a future ground- or space-based instrument. Each of the prototype heterodyne receivers integrates two InPMonolithic Microwave Integrated Circuit (MMIC) low-noise amplifiers, a coupled-line bandpass filter, a subharmonic balanced diode mixer, and a 90° local oscillator phase switch into a single compact module that is suitable for mass production. Room temperature measurements indicate bandaveraged receiver noise temperatures of 500 K from 85-100 GHz. Cryogenic receiver noise temperatures are expected to be around 50 K.
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Matthew Sieth, Matthew Sieth, Judy M. Lau, Judy M. Lau, Patricia Voll, Patricia Voll, Sarah Church, Sarah Church, Pekka Kangaslahti, Pekka Kangaslahti, Lorene Samoska, Lorene Samoska, Mary Soria, Mary Soria, Todd Gaier, Todd Gaier, Dan Van Winkle, Dan Van Winkle, Jeffrey Neilson, Jeffrey Neilson, Sami Tantawi, Sami Tantawi, Kieran Cleary, Kieran Cleary, Anthony C. S. Readhead, Anthony C. S. Readhead, } "Development of MMIC receivers for cosmic microwave background interferometry", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 77412I (15 July 2010); doi: 10.1117/12.857830; https://doi.org/10.1117/12.857830
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