Optimal Coupling of NbN HEB THz Mixers to Cryogenic HEMT IF Low-Noise Amplifiers

Details Optimal Coupling of NbN HEB THz Mixers to Cryogenic HEMT IF Low-Noise Amplifiers Optimal Coupling of NbN HEB THz Mixers to Cryogenic HEMT IF Low-Noise Amplifiers

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006stt..conf...77r&link_type=abstract

Seventeenth International Symposium on Space Terahertz Technology, held May 10-12, 2006 at Observatoire de Paris, LERMA. Paris,

Physics

1

Scientific paper

We are proposing a general approach to find the optimal coupling conditions between a NbN HEB mixer and its corresponding HEMT IF amplifier. We present our progress towards the development of suitable models for the analysis of the mixer/LNA sub-system in HEB terahertz down-converters. Our modeling approach takes into account parasitic reactances from the antenna and coplanar waveguide (CPVV) structures, wire-bonds, the effect of the biasing networks, etc. We discuss the implementation of a lumped-element matching network designed based on the optimal matching considerations, which can in principle be integrated into an MMIC LNA. Finally, we suggest packaging schemes to further reduce the size of the integrated receivers in order to accommodate a larger number of pixels in a focal plane array.

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