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你好,我是在做实验,不是在pcb板上做的,而是在99.5%氧化铝片子(介电常数为9.9,厚度为1mm)上有一层600nm的薄膜(介电常数300左右),在此膜上光刻出cpw线(材料是金,厚1um,线宽30um左右)。最后用矢量网络分析仪测S参数,所以实际上不知到怎么接地,而且地线和信号线之间加40V的直流电压应该没什么问题吧
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