The 1223D-12AC from ACST GmbH is a Frequency Multiplier with Input Frequency 11.66 to 18.33 GHz, Output Frequency 140 to 220 GHz, Input Power 0 to 5 dBm, Output Power 6 to 13 dBm, VSWR 1.80:1. Tags: Waveguide, Waveguide Multiplier. More details for 1223D-12AC can be seen below.