Wideband Filtering Balun Power Divider Using Schiffman Phase Shifter

Abstract

A novel wideband filtering balun power divider using Schiffman phase shifter is proposed. A modified Wilkinson power divider and two Schiffman phase shifters are adopted to realize wideband balun power divider. In addition, two transmission zeros are realized by using an open-ended stub at the input port to realize the filtering characteristic. A wideband filtering balun power divider ($\varepsilon_{\mathrm{r}}= 3.66,\ \mathrm{h}=0.762\ \text{mm},\ tan\delta=0.004$) centering at 2 GHz is designed and fabricated for verification.