The TH1201A / 8-18GHz from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 8 to 18 GHz, Insertion Loss 0.8 dB, Isolation 16 dB, Operating Temperature -40 to 70 Degree C. Tags: Coaxial Circulator. More details for TH1201A / 8-18GHz can be seen below.