Balanced-to-unbalanced filtering power divider with compact size and high common-mode suppression
A compact balanced-to-unbalanced (BTUB) filtering power divider (FPD) to simultaneously realise the functions of power dividing, bandpass response, a BTUB transformer with high common-mode suppression and good isolation between two output ports is proposed. This component is constructed by two half-wavelength resonators and the special designed feeding-line structure. For verification, an FPD working at 2.39 GHz is fabricated and measured. The measured results show good agreement with the simulation.