The 1214G-8AC from ACST GmbH is a Frequency Multiplier with Input Frequency 11.25 to 17.5 GHz, Output Frequency 90 to 140 GHz, Input Power 0 to 5 dBm, Output Power 10 to 14 dBm, VSWR 1.80:1. Tags: Waveguide, Waveguide Multiplier. More details for 1214G-8AC can be seen below.