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提出了一种双面低阻槽线共面波导功率分配器,其输入端采用双面共面波导,输出端采用双面低阻槽线。不同于普通槽线,双面低阻槽线是由金属化过孔连接介质基板两侧的槽线,相对于普通槽线,在同样的特性阻抗情况下,双面低阻槽线的缝隙比普通槽线要大得多。双面共面波导也是通过金属化过孔把介质基板两侧的共面波导连接起来,这样,同样大小的特性阻抗,双面共面波导导带与接地面之间的缝隙比普通共面波导要大得多。因此双面低阻槽线共面波导功率分配器具有较大的功率容量和工艺容差,两者都要大于普通槽线或者共面波导结构的功率分配器。仿真和测试结果表明,所提出的双面低阻槽线共面波导功率分配器工作在0.48~1.58 GHz,附加插入损耗是0.3 dB,功率不平衡度小于0.1 dB,相位不平衡度优于0.35°,三个端口的驻波均低于-10 dB,隔离度优于10 dB。
A double-sided low resistance slot coplanar waveguide power divider is proposed. Its input end adopts a double-sided coplanar waveguide, and the output end adopts a double-sided low-resistance slot line. Different from the ordinary slot line, the double-sided low resistance slot line is a slot line connecting the two sides of the dielectric substrate by the metallized via hole. Compared with the common slot line, in the same characteristic impedance, the slot ratio Ordinary slotline is much larger. The double sided coplanar waveguide also connects the coplanar waveguides on both sides of the dielectric substrate through the metalized via holes. In this way, the same size of characteristic impedance, the gap between the double sided coplanar waveguide strap and the ground plane is larger than that of the common coplanar waveguide To be much larger. Therefore, double-sided low impedance slotted coplanar waveguide power splitter has a larger power capacity and process tolerance, both greater than ordinary slot line or coplanar waveguide power splitter. Simulation and test results show that the proposed double-sided low impedance slot coplanar waveguide power splitter works at 0.48 ~ 1.58 GHz, the additional insertion loss is 0.3 dB, the power unbalance is less than 0.1 dB, the phase unbalance is better than 0.35 °, the standing waves of all three ports are lower than -10 dB and the isolation is better than 10 dB.