PT Unknown AU de Lange, G Krieg, J Honingh, N Karpov, A Cherednichenko, S TI Performance of the HIFI flight mixers SE Proc. 19[super:th] Int. Symp. Space Terahertz Technol. PY 2008 BP 98 EP 105 DE HEB mixer applications; HEB applications AB We summarize the technology and final results of the superconducting heterodyne SIS and HEB mixers that are developed for the HIFI instrument. Within HIFI 7 frequency bands cover the frequency range from 480 GHz to 1910 GHz. We describe the different device technologies and optical coupling schemes that are used to cover the frequency bands. The efforts of the different mixer teams that participate in HIFI have contributed to an instrument that will have unprecedented sensitivity and frequency coverage. ER