Analysis of UWB Wilkinson Power Divider Design Using 4-Stepped Patch and Ring Structure

A Wilkinson ultra-wideband (UWB) power splitter is proposed and analyzed in this paper. The power divider line is added with a resistive load to keep the two output ports matched. The power divider is designed with a 4-stepped patch and ring capable of producing UWB frequencies. The proposed power divider design approach is derived from the analysis of even/odd mode circuits and stripline transmission lines. The power splitter design process was optimized and simulated using CST Studio Suite with a 1.524mm thickness RO4350B substrate and a dielectric constant of 3.66. The overall dimensions of the proposed power divider are 85mm x 37mm. The proposed wilkinson power divider has an operating frequency of 3GHz - 13GHz. The insertion loss obtained has the lowest value of about -9dB, and the isolation value is below -10dB in the operating frequency range.