Noise temperature distribution of superconducting hot electron bolometer mixers

Zhou Kang-Min^{1, 2}, Miao Wei^{1, 2}, Geng Yue^{1, 2, 4}, Delorme Yan³, Zhang Wen^{1, 2}, Ren Yuan^{1, 2}, Zhang Kun^{1, 2}, Shi Sheng-Cai^{1, 2, †}

(a) Simulated transmission of the air path in our lab by AM model. (b) Normalized coupling efficiency of spiral antenna by simulation and FTS measurement.