The 213C from ACST GmbH is a Frequency Multiplier with Input Frequency 88.33 to 100 GHz, Output Frequency 265 to 300 GHz, Input Power 80 to 400 mW, Output Power 19.54 dBm, Frequnecy 88.33 to 100 GHz. Tags: Waveguide, Passive, Waveguide Multiplier. More details for 213C can be seen below.