A Harmonic-Free Wilkinson Power Divider Using Lowpass Resonators

This paper presents a Wilkinson power divider (WPD) capable of suppressing unwanted bands up to 16
^th
harmonic with high isolation. In this WPD, a lowpass filter composed of a main resonator and three bended stubs are used to guarantee a wide stopband. The presented WPD illustrates suitable performance at 0.85 GHz for GSM applications. Isolation between of output ports, input return loss and insertion loss are better than 24 dB, 20 dB and 3.4 dB, respectively.