The R&S®ZC1100 from Rohde & Schwarz is a Vector Network Analyzer Extender with Extended Frequency 750 to 1100 GHz, Input Frequency 13.888 to 20.370 GHz, LO Frequency 15.619 to 22.911 GHz, Output Power -30 to -25 dBm, Input Power 5 dBm(Damage Level). More details for R&S®ZC1100 can be seen below.