The TH0201A / 0.26-0.30GHz from Sainty-Tech Communications Limited is a RF & Microwave Circulator with Frequency 0.26 to 0.30 GHz, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -30 to 70 Degree C. Tags: Coaxial Circulator. More details for TH0201A / 0.26-0.30GHz can be seen below.