A 4-Way Broadband Power Divider Based on the Suspended Microstrip Line

In this paper, a four-way broadband power divider operating from S-band to Ku-band (2GHz-18GHz) is presented and demonstrated. Compared with conventional simple T-shaped power divider, this power divider applies multi-section impedance transformers and suspended microstrip line(SSML) in order to achieve the average insertion loss about -6.3dB and the return loss less than -15dB. In addition, this power divider is adopted in a nonresonante chained structure so that its outputs can theoretically be arbitrary $\pmb{2}^{\mathbf{N}}$ ways. The simulated return loss is fully less than -15dB in the whole band, while it is also less than -20dB from 4.43GHz to 18GHz. And simulated insertion loss is near -6.3dB. The final measured results shows a good agreement with simulated results.