A novel compact Gysel power divider with harmonic suppression

This paper presents a new design of a compact Gysel power divider with harmonic suppression. The proposed design has simple layout with four additional stubs added to the conventional Gysel power divider structure. Moreover, exact closed-form equations are obtained based on even- and odd-mode analysis. For demonstration, a microstrip implementation of the proposed design operating at 1 GHz with the second to sixth harmonic suppression and 58% size reduction compared to the conventional Gysel power divider is developed. Simulation and measurement results show good insertion loss, return loss, isolation, and wide stopband bandwidth, while maintaining highpower handling capability over the Wilkinson power divider.