Design method of an N-way power divider with dual-frequency

A novel planar N-way dual-frequency power divider is presented. The topology of the circuit consists of two sections of N transmission lines and 2N-2 planar isolation resistors, which provides enough isolation at two arbitrary frequencies. The structure of the power divider and the formulas used to determine the design parameters are derived. For verification purposes, a three-way power divider with a power split ratio of 1: 2: 3 at both frequencies 915 and 2450 MHz has been fabricated using microstrip technology. The measured results are in good agreement with the predicted ones.