The 211AX from ACST GmbH is a Frequency Multiplier with Input Frequency 135 to 160 GHz, Output Frequency 270 to 320 GHz, Input Power 40 to 280 mW, Output Power 19.54 dBm, Frequnecy 135 to 160 GHz. Tags: Waveguide, Frequency Doubler, Waveguide Multiplier. More details for 211AX can be seen below.