The STH-28SF-S1 from ERAVANT is a Waveguide Mixer with RF Frequency 26.5 to 40 GHz, IF Frequency DC to 4 GHz, LO Drive Level 10 to 16 dBm, Input Power -20 to 16 dBm, Output Power 10 to 16 dBm. Tags: Harmonic Mixer. More details for STH-28SF-S1 can be seen below.