Design of a Dual-Band Power Divider with Ultra-Wide Suppression Band using Triple Tapered Resonators

This paper introduces a novel design paradigm for a dual-band power divider utilizing Triple Tapered Resonators (TTR) to achieve harmonic suppression and size reduction. Traditionally, power dividers have been constructed with quarter-wavelength structures, resulting in larger dimensions. In this work, we strategically integrate TTRs into each main branch of the power divider, resulting in a significant reduction in the length of the main branches and an overall size reduction of the power divider. The TTRs play a vital role in suppressing harmonics and enhancing the power divider performance. Proposed power divider is designed based on RT/duroid 5880 with a relative dielectric constant of 2.2, thickness of 31 mil and loss tang of 0.0009. The proposed design demonstrates significant improvements in harmonic suppression compared to the conventional designs. The outcomes of this research contribute not only to the miniaturization of power dividers but also highlight the effectiveness of triple-tapered resonators in achieving harmonic suppression in the context of a new power divider structure. Additionally, the obtained results for the proposed power divider are presented, featuring dual-band operation at 900 MHz and 2.3 GHz, a harmonics suppression band from 3.2 to 10.1 GHz, and a compact size of 16 mm × 24.5 mm.