Semenov, A., Richter, H., Hübers, H. - W., Petrenko, D., Tretyakov, I., Ryabchun, S., et al. (2014). Optimization of the intermediate frequency bandwidth in the THz HEB mixers. In _Proc. 25<sup>th</sup> Int. Symp. Space Terahertz Technol._ (54).