The SMD1300-T1400 from Mercury Systems is a RF & Microwave Circulator with Frequency 1.45 to 1.54 GHz, Bandwidth 900 MHz, Average Power Forward 5 W, Average Power Reverse 1 W, Insertion Loss 0.5 dB. Tags: Microstrip Circulator. More details for SMD1300-T1400 can be seen below.