The SB4020 from Fairview Microwave is a Bias Tee that operates from 10 MHz to 40 GHz. It can handle a maximum DC voltage of 16 V and a DC current of up to 250 mA. This bias tee has an insertion loss of less than 1.8 dB and a VSWR of 1.6:1. It is available in a module that measures 0.750 x 0.834 x 0.365 inches with 2.92 mm female connectors.