A Wilkinson power divider (WPD) with good novelty has been presented in this letter. To achieve this design, each quarter-wavelength lines of the conventional WPD have been replaced by two symmetrical comb-shaped resonators. These resonators create two rejection bands near their passbands, which can guarantee a good harmonics suppression for a power divider. By applying and computing the even-/odd-modes analysis, the suggested PD has been analyzed. In the proposed PD, the extra harmonics from second to 10th are suppressed. The normalized circuit size for operation in the center frequency of 1.1 GHz is about 0.06 × 0.07 λg. Eventually, fabrication of the power divider has been done on Rogers type RT-Duroid 5880 substrate and tested. The measured return loss is about 16 dB in the fundamental frequency. The obtained experimental S-parameters validated the primal design results. Therefore, the proposed WPD is a high performance one, which can be applied for applications such as the signal splitter in a Doherty power amplifier.
