Design of dual-band power divider using shunt open-stubs with enhanced attenuation characteristics

This paper presents a dual-band power divider using shunt open-stubs with enhanced attenuation characteristics. The improved transmission responses are achieved by transmission zeros created from shunt open-stubs, and the center frequencies of two passbands are also controlled by the shunt open-stubs. Moreover, the proposed power divider has control of bandwidths in two passbands. The bandwidths of two passbands are adjusted by the characteristic impedance and the electrical length of the admittance inverter between shunt open-stubs. To demonstrate the proposed method, a dualband power divider is designed at center frequencies of 3.2GHz with the fractional bandwidth (FBW) of 10% and 4.8GHz with the FBW of 7%, respectively.