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what's the different between CPW and Microstrip line?
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bitele



Joined: 17 Aug 2008
Posts: 24
Post26 Jun 2009 7:51   

cpw strip line
and why the bandwidth of coplanar waveguide (CPW) is greater than microstrip line?
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vfone



Joined: 10 Oct 2001
Posts: 2284
Helped: 320
Post28 Jun 2009 9:22   

cpw microstrip
http://www.jlab.org/accel/eecad/pdf/050rfdesign.pdf
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Post28 Jun 2009 9:22   

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tukang



Joined: 30 Jun 2009
Posts: 2
Location: ID
Post05 Jul 2009 16:15   

coplanar waveguide line
vfone wrote:
http://www.jlab.org/accel/eecad/pdf/050rfdesign.pdf

If I make a stripline track with ground plane above and below it and then pour ground at its right and left side, it becomes similar to coplanar waveguide with ground, except that it is not microstrip but stripline. How do we call such track, and how is the performance on EMI and noise reception? How do we calculate its impedance?
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flyhigh



Joined: 12 Nov 2003
Posts: 561
Helped: 32
Location: somewhere over the rainbow
Post05 Jul 2009 21:36   

cpw stripline
Hi

There are few reference books that are dealing with your problem:

Terry Edwards –
Foundations of Interconnect and Microstrip Design, 3rd Edition, John Wiley & Sons, 2000
K.C. Gupta, Ramesh Garg, Inder Bahl, Prakash Bhartia –
Microstrip Lines and Slotlines, Second Edition, Artech House, 1996
Rainee N. Simons –
Coplanar Waveguide Circuits Components and Systems, John Wiley & Sons, 2001

flyhigh
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tukang



Joined: 30 Jun 2009
Posts: 2
Location: ID
Post06 Jul 2009 2:36   

cpw mircostrip
flyhigh wrote:
Hi

There are few reference books that are dealing with your problem:

Terry Edwards –
Foundations of Interconnect and Microstrip Design, 3rd Edition, John Wiley & Sons, 2000
K.C. Gupta, Ramesh Garg, Inder Bahl, Prakash Bhartia –
Microstrip Lines and Slotlines, Second Edition, Artech House, 1996
Rainee N. Simons –
Coplanar Waveguide Circuits Components and Systems, John Wiley & Sons, 2001

flyhigh

Thank you for the information. From the book Coplanar waveguide circuits, components, and systems section 1.2, there mentioned several types of CPW, but all of them are microstrip (top or bottom layer). Is it uncommon to have stripline for transmission line?
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