关键词: 功分器, 扩展同轴, 宽带

Abstract: In terms of the axial symmetry of dominant mode TEM in the coaxial waveguide，a 8-way wideband oversized coaxial power divider is designed and fabricated，based on the design principle in this paper.High frequency structure simulator HFSS is used in the circuit simulation and optimization，and the power divider is fabricated and measured.The simulated results show its insertion loss is better than 0.65 dB and the return loss is below-9 dB.It proves that the oversized coaxial structure has can be widely used in the power synthesis field，featuring wide bandwidth，low insertion loss，good balance of amplitude and phase at output ports.

Key words: power divider, oversized coaxial, wideband