Theory and Design of a Novel Wideband DC Isolated Wilkinson Power Divider

In this letter, a novel wideband 3-dB Wilkinson power divider (WPD) is presented. It employs port matching using coupled lines to achieve wider isolation bandwidth, without modifying the isolation network. Due to the presence of parallel coupled lines, the design enjoys complete DC isolation. Analysis leading to closed-form design equations shows freedom in choosing design parameters. Many design case studies are provided to show the capabilities of the proposed design. The designed and fabricated prototype shows promising results.