An ultra-wideband compact 1 to 8 Wilkinson power divider

In this paper, an ultra-wideband 1:8 power divider on strip line is proposed. The power divider is formed by cascading 2-way Wilkinson power dividers, and its structure is arranged on two different layers via interlayer transition, making it more compact. The design and simulation of the 2-way Wilkinson power divider and interlayer transition are introduced. Simulation results show that for 2-way power divider, in operating band from 2 to 20 GHz, return loss is less than -19dB, port isolation is greater than 20dB, and maximum insertion loss is 2.3dB at 20GHz. For interlayer transition, return loss is less than -28dB in operating band. The simulation for 1:8 power divider is also conducted, return loss is less than -13dB in 2-20GHz, with isolation more than 20dB and insertion loss lower than 6.5dB on 20GHz.