[7a-S43-1~12] 11.4 Analog applications and their related technologies

[7a-S43-9] Frequency Up-conversion with Positive Gain and Low Noise in SIS Junctions

〇Yoshinori Uzawa^1,2, Takafumi Kojima², Wen-Lei Shan² (1.NICT, 2.NAOJ)

Keywords:SIS junctions, frequency up-conversion, gain

We newly propose the use of SIS junctions as a frequency up-converter based on quasi-particle mixing for applications in frequency division multiplexing circuits and amplifiers. For these purposes, a positive gain and a low noise characteristics are required at the frequency up-conversion. In this paper, we report the possible positive gain by applying Tucker 's SIS mixer theory to the calculation of frequency up-conversion and also show the gain experimentally.