Cao Aiqin author Jiang L author Chen S H author Antipov S V author Shi S C author 2007 Builin In this paper, the intermediate frequency (IF) gain bandwidth of a quasi-optical NbN superconducting hot-electron bolometer (HEB) mixer is investigated at 500 GHz with an IF system incorporating with a frequency down-converting scheme which is able to sweep the IF signal in a frequency range of 0.3-4 GHz. The IF gain bandwidth of the device is measured to be 1.5 GHz when it is biased at a voltage of the minimum noise temperature, and becomes larger when the bias voltage increases. HEB mixer gain bandwidth exported from refbase (https://db.rplab.ru/refbase/show.php?record=575), last updated on Tue, 07 Apr 2009 11:26:55 +0000 text 10.1109/ICMMT.2007.381462 Cao_etal2007 2007 Builin conference publication 1 3