The STO-0609300-R-E1 from ERAVANT is a Vector Network Analyzer Extender with Extended Frequency 110 to 170 GHz, Input Frequency 4.58 to 7.08 GHz, LO Frequency 4.58 to 7.08 GHz, Input Power -3 to 3 dBm (LO), 10 dBm (Damage), Dynamic Range 100 dB. More details for STO-0609300-R-E1 can be seen below.