Broadband Chokes for Bias Tee Applications

The demand for broader bandwidth in data communication is continually increasing, and the integrity of RF signals has become a major design concern. In broadband bias applications, most inductors do not cover enough impedance bandwidth. Placing three or four inductors in series can increase bandwidth, but DC losses and filter complexity also increase. Conversely, a broadband bias choke can provide the desired bandwidth from a single inductor package. This application note discusses the use of broadband chokes in bias tees and the critical component specifications you will need to consider.