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https://pure.dongguk.edu/en/publications/design-of-switching-mode-cmos-frequency-multipliers-in-sub-terahe/ Design of switching-mode CMOS frequency multipliers in sub-Terahertz regime - Dongguk University design of frequency multipliers switching mode cmos https://aaltodoc.aalto.fi/items/4555b4ea-ecfd-41a8-991a-158f8a6d006a Effect of cooling on the efficiency of frequency multipliers at submillimeter waves on the frequency multipliers effect cooling efficiency