The STO-1520305-R-E1 from ERAVANT is a Vector Network Analyzer Extender with Extended Frequency 50 to 75 GHz, Input Frequency 12.5 to 18.75 GHz, LO Frequency 12.5 to 18.75 GHz, Input Power 0 to 6 dBm (LO), 5 dBm (Damage), Dynamic Range 100 to 120 dB. More details for STO-1520305-R-E1 can be seen below.