Wideband receiver technologies for upgrading ALMA telescope

抄録

The ALMA telescope, operating in the Republic of Chile, has achieved various results since 2011. However, advanced enhancements are required for it to continue as the leading technology in the field of astronomy. This telescope is termed ALMA 2 in Japan, and one of the most important developments is the wide instantaneous bandwidth of the telescope system. This article introduces part of the research on wideband technologies for the superconducting receiver frontend.