Characterization of a Quasi-Optical NbN Superconducting Hot-Electron Bolometer Mizer
In this paper,we report the performance of a quasi-optical NbN superconducting HEB (hot electron bolometer) mixer measured at 500 GHz. The quasi-optical NbN superconducting HEB mixer is cryogenically cooled by a 4-K close-cycled refrigerator. Its receiver noise temperature and conversion gain are thoroughly investigated for different LO pumping levels and dc biases. The lowest receiver noise temperature is found to be approximately 1200 K, and reduced to about 445 K after correcting the loss of the measurement system. The stability of the mixer s IF output power is also demonstrated.
L.Jiang G.N.Goltsman W.Zhang Q.J.Yao Z.H.Lin S.C.Shi Y.B.Vachtomin S.V.Antipov S.I.Svechnikov B.M.Voronov
Purple Mountain Observatory,NAOC,CAS,China Moscow State Pedagogical University,Russia
国际会议
Progress in Electromagnetics Research Symposium 2005(2005年电磁学研究新进展学术研讨会)(PIERS 2005)
杭州
英文
587-590
2005-08-22（万方平台首次上网日期，不代表论文的发表时间）