The BT-18A is a broadband bias tee from RLC Electronics that that operates from 0.5 to 18 GHz. It has an insertion loss of less than 1.5 dB and a VSWR of less than 1.6:1. The bias tee can handle up to 5 W of power and a DC current of up to 500 mA. It is available with SMA female connectors.