A new design method for a dual-band power divider

This paper presents a dual-band 2 section Wilkinson power divider. The proposed method is used that transmission lines of the divider are transformed to pi-type equivalent circuits, which can be same impedance and electrical length. To validate the proposed method, we design a dual-band divider which is used for 0.9 GHz cellular and 1.8 GHz 3^rd generation system. The specified dual-band divider which has 1:1 power division ratio at two bands is designed, fabricated and measured. The measured results show excellent performance with an insertion loss of less than 0.25 dB, a return loss of less than 118.74 dB, and good isolation characteristics.