The SB4020 from Fairview Microwave is a Bias Tee with Frequency 10 MHz to 40 GHz, Max. Voltage 16 Volts, Max Current 0.25 A, Insertion Loss 1.5 to 1.8 dB, Operating Temperature -40 to 85 Degree C. Tags: Module with Connectors. More details for SB4020 can be seen below.