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50r pcb stripline width??
ok..i know the width of track for 50r pcb stripline using standard 1/16in
fibreglass pcb is 2.8mm but howabout 1/8in pcb??? or does anyone have programe that works this out? (for dos/windows .) reason for asking making high power swr meter and i have a large sheet of 1/8 in pcb i need to use.... g0zen. simon |
In article ,
says... ok..i know the width of track for 50r pcb stripline using standard 1/16in fibreglass pcb is 2.8mm but howabout 1/8in pcb??? or does anyone have programe that works this out? (for dos/windows .) reason for asking making high power swr meter and i have a large sheet of 1/8 in pcb i need to use.... g0zen. simon Simon, Some useful calculators at http://www.emclab.umr.edu/pcbtlc/microstrip.html HTH Gary |
Hi,
Google for (and download) AppCAD from the Agilent site. 73 de Joe, G3LLV |
Hi,
Google for (and download) AppCAD from the Agilent site. 73 de Joe, G3LLV |
In article , "zindazenda" wrote:
ok..i know the width of track for 50r pcb stripline using standard 1/16in fibreglass pcb is 2.8mm but howabout 1/8in pcb??? or does anyone have programe that works this out? (for dos/windows .) reason for asking making high power swr meter and i have a large sheet of 1/8 in pcb i need to use.... g0zen. simon A good enuf approximation would be to double the width for the 1/16" board -- gives 5.6 mm when using 1/8". The Zo is a function of the w/h ratio [not exact, but close enuf for anything you would be using G-10 or similar for]. Dr. G. |
In article , "zindazenda" wrote:
ok..i know the width of track for 50r pcb stripline using standard 1/16in fibreglass pcb is 2.8mm but howabout 1/8in pcb??? or does anyone have programe that works this out? (for dos/windows .) reason for asking making high power swr meter and i have a large sheet of 1/8 in pcb i need to use.... g0zen. simon A good enuf approximation would be to double the width for the 1/16" board -- gives 5.6 mm when using 1/8". The Zo is a function of the w/h ratio [not exact, but close enuf for anything you would be using G-10 or similar for]. Dr. G. |
If you scale all the dimensions of any TEM line, the impedance will
stay the same. Also, I have an Excel spreadsheet that lets you find impedances (a free download but I don't have the URL handy...), and there are several stripline/microstrip applets on the web...should be easy to find with a Google search. Perhaps the best answer is to use the transmission line calculator in RFSim99, which is free and does a whole lot more than just transmission lines. Cheers, Tom "zindazenda" wrote in message ... ok..i know the width of track for 50r pcb stripline using standard 1/16in fibreglass pcb is 2.8mm but howabout 1/8in pcb??? or does anyone have programe that works this out? (for dos/windows .) reason for asking making high power swr meter and i have a large sheet of 1/8 in pcb i need to use.... g0zen. simon |
If you scale all the dimensions of any TEM line, the impedance will
stay the same. Also, I have an Excel spreadsheet that lets you find impedances (a free download but I don't have the URL handy...), and there are several stripline/microstrip applets on the web...should be easy to find with a Google search. Perhaps the best answer is to use the transmission line calculator in RFSim99, which is free and does a whole lot more than just transmission lines. Cheers, Tom "zindazenda" wrote in message ... ok..i know the width of track for 50r pcb stripline using standard 1/16in fibreglass pcb is 2.8mm but howabout 1/8in pcb??? or does anyone have programe that works this out? (for dos/windows .) reason for asking making high power swr meter and i have a large sheet of 1/8 in pcb i need to use.... g0zen. simon |
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