The 1219H-18AC from ACST GmbH is a Frequency Multiplier with Input Frequency 13.88 to 20.55 GHz, Output Frequency 250 to 370 GHz, Input Power 0 to 5 dBm, Output Power 2 to 6 dBm, VSWR 1.80:1. Tags: Waveguide, Waveguide Multiplier. More details for 1219H-18AC can be seen below.