Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 58, Issue 7, Pages 1917-1924Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2010.2050181
Keywords
Cryogenic test bench; fundamental balanced mixer (FBM); monolithic microwave integrated circuit (MMIC); passive cooling; planar Schottky diode; submillimeter wavelengths; vacuum chamber
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Funding
- National Aeronautics and Space Administration (NASA)
- European Space Agency [ESTEC/RFQ/3- 12604/08/NKAFM]
- Oak Ridge Associated University under NASA
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The development of a 835-900-GHz biasable fundamental balanced mixer using planar GaAs Schottky diodes is presented. The monolithic microwave integrated circuit integrates two planar Schottky anodes in a balanced configuration, stripline filtering elements, and on-chip capacitor on a thin GaAs membrane. At 850 GHz, double side-band (DSB) mixer noise temperature of 2660 K and conversion loss of 9.25 dB are measured, respectively, at room temperature. When the mixer is cooled to 120 K, the DSB mixer noise temperature and conversion loss improve to 1910 K and 8.84 dB, respectively.
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