The SB51D2 from SigaTek is a Bias Tee that operates from 30 kHz to 40 GHz. It can handle a DC voltage of up to 50 V and a DC current of 0.75 A. This bias-tee provides more than 30 dB of isolation and has an insertion loss of less than 2.8 dB. It is available in a module that measures 1.200 x 0.630 x 0.500 inches and has 2.92 mm (female) connectors.