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WPD have been replaced by two symmetrical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.