This project seeks to extend HEMT MMIC heterodyne module technology to the 15o GHz atmospheric window with a prototype module that demonstrates the functionality, mass-produceability, and scalability of this technology to large arrays. The RF path in the prototype module includes three InP Low Noise Amplifiers (LNAs), a second harmonic mixer for downconversion to the Intermediate Frequency (IF) band, and bandpass filters for band definition. Specialized DC bias boards and hermetic bias through pins help enable the compact size of the module, which is only about one inch cubed when assembled. The split block design of the module housing allows easy access to the MMIC channel for rapid assembly.
Cryogenic tests have measured an average system noise temperature of 87 K and average gain of 22 dB over a band from 140 to 180 GHz. A spot noise temperature of 58 K has been measured at 166 GHz.
For more information, see:
- Patricia Voll, Lorene A. Samoska, Sarah E. Church, Judy M. Lau, Matthew Sieth, Todd C. Gaier, Pekka P. Kangaslahti, Mary Soria, Sami Tantawi, and Dan Van Winkle, “A G-band cryogenic MMIC heterodyne receiver module for astronomical applications,” Proc. of the 41st European Microwave Conference, pp. 523 – 526, Oct. 2011.
- Patricia Voll, Judy M. Lau, Matthew Sieth, Sarah E. Church, Lorene A. Samoska, Pekka P. Kangaslahti, Mary Soria, Todd C. Gaier, Dan Van Winkle and Sami Tantawi, “Development of a 150 GHz MMIC module prototype for large-scale CMB radiation experiments”, Proc. SPIE 7741, 77412J (2010); doi:10.1117/12.857872
- Patricia Voll, Judy M. Lau, Matthew Sieth, Sarah E. Church, Lorene A. Samoska, Pekka P. Kangaslahti, Mary Soria, Todd C. Gaier, Dan Van Winkle and Sami Tantawi, “A 150 GHz Receiver Module for Astronomical Observations”, Poster presentation at AAS 2011