@Article{Ekstoerm_etal1997, author="Ekst{\"o}rm, H. and Kollberg, E. and Yagoubov, P. and Gol{\textquoteright}tsman, G. and Gershenzon, E. and Yngvesson, S.", title="Gain and noise bandwidth of NbN hot-electron bolometric mixers", journal="Appl. Phys. Lett.", year="1997", volume="70", number="24", pages="3296--3298", optkeywords="NbN HEB mixers; conversion loss; conversion gain; U-factor technique", abstract="We have measured the noise performance and gain bandwidth of 35 {\AA} thin NbN hot-electron mixers integrated with spiral antennas on silicon substrate lenses at 620 GHz. The best double-sideband receiver noise temperature is less than 1300 K with a 3 dB bandwidth of ≈5 GHz. The gain bandwidth is 3.2 GHz. The mixer output noise dominated by thermal fluctuations is 50 K, and the intrinsic conversion gain is about -12 dB. Without mismatch losses and excluding the loss from the beamsplitter, we expect to achieve a receiver noise temperature of less than 700 K.", optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=279), last updated on Tue, 25 May 2021 19:34:01 -0500", doi="10.1063/1.119143", opturl="https://aip.scitation.org/doi/abs/10.1063/1.119143", opturl="https://doi.org/10.1063/1.119143" }