Project supported by the Chinese Academy of Sciences(Grant Nos.GJJSTD20180003 and QYZDJ-SSW-SLH043);the National Key Basic Research and Development Program of China(Grant Nos.2017YFA0304003 and 2018YFA0404701);the National Natural Science Foundation of China(Grant Nos.11603081,11673073,U1831202,and 11873099);PICS projects between the CAS and the CNRS.
We report on the investigation of optimal bias region of a wide-band superconducting hot electron bolometer(HEB)mixer in terms of noise temperature performance for multi-pixel heterodyne receiver application in the 5-...