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23 July 2014 Argus: a 16-pixel millimeter-wave spectrometer for the Green Bank Telescope
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Abstract
We report on the development of Argus, a 16-pixel spectrometer, which will enable fast astronomical imaging over the 85–116 GHz band. Each pixel includes a compact heterodyne receiver module, which integrates two InP MMIC low-noise amplifiers, a coupled-line bandpass filter and a sub-harmonic Schottky diode mixer. The receiver signals are routed to and from the multi-chip MMIC modules with multilayer high frequency printed circuit boards, which includes LO splitters and IF amplifiers. Microstrip lines on flexible circuitry are used to transport signals between temperature stages. The spectrometer frontend is designed to be scalable, so that the array design can be reconfigured for future instruments with hundreds of pixels. Argus is scheduled to be commissioned at the Robert C. Byrd Green Bank Telescope in late 2014. Preliminary data for the first Argus pixels are presented.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Matthew Sieth, Kiruthika Devaraj, Patricia Voll, Sarah Church, Rohit Gawande, Kieran Cleary, Anthony C. S. Readhead, Pekka Kangaslahti, Lorene Samoska, Todd Gaier, Paul F. Goldsmith, Andrew I. Harris, Joshua O. Gundersen, David Frayer, Steve White, Dennis Egan, and Rodrigo Reeves "Argus: a 16-pixel millimeter-wave spectrometer for the Green Bank Telescope", Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91530P (23 July 2014); https://doi.org/10.1117/12.2055655
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