The QMC-JFC12-8305 from Quantum Microwave is a Waveguide Circulator with Frequency 81 to 86 GHz, Bandwidth 5 GHz, Power 1.5 W, Isolation 16 to 19 dB, Insertion Loss 0.6 to 0.9 dB. Tags: Ferrite Circulator. More details for QMC-JFC12-8305 can be seen below.