The F2112-0300-67 from Wenteq Microwave is a Single Junction Coaxial Isolator that operates from 2 to 4 GHz. It provides reverse isolation of more than 17 dB and has an insertion loss of less than 0.7 dB. The isolator can handle CW forward power of 30 W and CW reverse power of 10 W. It is available in a module that measures 1.614 x 1.614 x 0.866 inches with SMA-female connectors.