The 229C from ACST GmbH is a Frequency Multiplier with Input Frequency 400 to 450 GHz, Output Frequency 800 to 900 GHz, Input Power 10 to 40 mW, Output Power 1.7 dBm, Frequnecy 400 to 450 GHz. Tags: Waveguide, Waveguide Multiplier. More details for 229C can be seen below.