The 215A from ACST GmbH is a Frequency Multiplier with Input Frequency 135 to 157 GHz, Output Frequency 405 to 470 GHz, Input Power 40 to 140 mW, Output Power 13.01 dBm, Frequnecy 135 to 157 GHz. Tags: Waveguide, Passive, Waveguide Multiplier. More details for 215A can be seen below.