Design of flexible broadband power divider based on defect ground compensation

This paper presents a flexible broadband power divider based on defect compensation that works in the 3-12GHz frequency band. In the design, the cascaded multi-section impedance converter is employed to expand the working bandwidth, at the same time, additional capacitance and inductance are introduced through the defective ground structure (DGS) to compensate for the performance of the splitter caused by bending. This paper analyzes the transmission characteristics of the flexible power divider in different directions and at different angles through numerical calculation and modeling simulation. The results show that the proposed compensation design scheme achieves a maximum insertion loss of -3.1dB within 3-12GHz, the flatness of the most in-band is less than 0.7dB, the isolation is <; -15 dB. Finally, a prototype is fabricated and tested to verify the design method.