Planar three-way dual-frequency power divider

A novel planar three-way dual-frequency power divider is presented. The topology of the circuit is four sections of three transmission lines and planar isolation resistors, which provides enough isolation and good amplitude balance simultaneously at two arbitrary frequencies. The structure of the power divider and the formulas used to determine design parameters are given. The technique is validated by experimental results on a 900/1800 MHz and a 915/2450 MHz power divider. Good experimental performances at both frequencies are obtained.