Development of Mixers for the High-Resolution Spectrometer of the Millimetron Space Observatory

The study of the origin and transport of water in the universe is an important part of the scientific program of the Millimetron space observatory. This will be made possible by observations conducted in single-dish mode using an onboard instrument—the high-resolution spectrometer (HRS). This instrument incorporates heterodyne array receivers operating within the range $0.5 -2.7$ THz, comprising 3-pixel arrays of superconductor–insulator–superconductor mixers operating at frequencies below 1.3 THz and 7-pixel matrix receivers based on NbN HEB mixers observing above 1.3 THz. This article presents the current status of development for a mixers planned for use in the HRS instrument of the Millimetron space observatory.