Compact Triple-Band Power Divider Integrated Bandpass-Filtering Response Using Short-Circuited SIRs

Based on short-circuited stepped-impedance resonators (SIRs), a triple-band power divider (PD) with bandpass-filtering response is presented. The triple-passband filtering response is achieved for the presented PD. The first and third passbands are realized by the short-circuited SIRs, while the second passband is introduced and tuned by half-wavelength resonators independently. The triple-passband response of the presented PD has been designed by using the coupling matrix synthesis. Moreover, the desired resonant frequencies of the three passbands can be obtained by tuning the impedance ratio and electric lengths of the high-impedance and the low-impedance transmission lines. The performance of the PD is verified by the simulation and measurement results.