The 214A from ACST GmbH is a Frequency Multiplier with Input Frequency 62.50 to 93.75 GHz, Output Frequency 125 to 187.5 GHz, Input Power 50 to 250 mW, Output Power 13.01 dBm, Frequnecy 62.50 to 93.75 GHz. Tags: Waveguide, Frequency Doubler, Waveguide Multiplier. More details for 214A can be seen below.