The 216D from ACST GmbH is a Frequency Multiplier with Input Frequency 25 to 37.50 GHz, Output Frequency 50 to 75 GHz, Input Power 50 to 700 mW, Output Power 20.41 dBm, Frequnecy 25 to 37.50 GHz. Tags: Waveguide, Frequency Doubler, Waveguide Multiplier. More details for 216D can be seen below.