The TH701A / 12-18GHz from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 12 to 18 GHz, Insertion Loss 0.6 dB, Isolation 18 dB, Operating Temperature -40 to 70 Degree C. Tags: Coaxial Circulator. More details for TH701A / 12-18GHz can be seen below.