Cryogenic low noise amplifiers in an InP HEMT MMIC process
2015
An indium phosphide HEMT MMIC process was developed for ultralow noise amplifiers (LNAs) at cryogenic temperatures. The process was run on 4" wafers and utilized 130 nm gate-length HEMTs. Several wide band LNAs were made in a frequency range between 1 GHz and 100 GHz. A Ka band LNA had a minimum noise temperature of 10 K and a gain of 35 dB.
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