关于CPW馈电

CPW馈电一般有两种，一种是no ground的，一种是with ground的,请问这两种有什么区别啊？什么时候应该分别用这两种馈电，还请高人指点一下！谢谢！ 

网友回复:

关于你这个问题，我这刚好有份资料 
 
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网友回复:

上传不了，只能复制了 
 
Structure 
Coplanar Waveguide is a transmission line system consisting of a central current-carrying trace atop a substrate, coplanar with side grounds extending beyond a symmetric gap to either side of the trace.  There are different kinds of CPW transmission lines used in RF and microwave applications 
Grounded CPW (GCPW) will have an additional ground plane on the underside of the substrate.  In practice this plane needs to be sufficiently distant from the trace as compared with the side grounds that the system carries a CPW mode rather than a lossy microstrip mode 
Ungrounded CPW is more standard, in which the side grounds coplanar to the strip itself provide the only return current path, and the underside of the substrate is unclad. 
Finite Ground CPW (FG-CPW) traditionally refers to an ungrounded CPW in which the side ground metalization is of limited width, often not more than 2 – 3 times the width of the center trace itself, due to space considerations. 
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网友回复:

刚看到，谢谢回答！

网友回复:

学习呀！能解释得清楚点吗。

网友回复:

学习呀！能解释得清楚点吗。

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