The BT-50-400D from Pulsar Microwave is a Bias Tee that operates from 30 kHz to 40 GHz. It can handle an RF input power of up to 1 W and max DC levels of 25 V. This bias tee has an insertion loss of less than 3 dB and provides more than 30 dB of isolation. It is available in a module that measures 1.20 x 0.63 x 0.50 inches with 2.92 mm connectors.