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Old November 24th 03, 07:53 PM
zindazenda
 
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Default 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


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Old November 24th 03, 11:56 PM
Joe McElvenney
 
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Hi,

Google for (and download) AppCAD from the Agilent site.


73 de Joe, G3LLV



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Old November 24th 03, 11:56 PM
Joe McElvenney
 
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Hi,

Google for (and download) AppCAD from the Agilent site.


73 de Joe, G3LLV





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Old November 25th 03, 01:41 AM
Dr. Grok
 
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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.
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Old November 25th 03, 01:41 AM
Dr. Grok
 
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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.
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Old November 25th 03, 02:03 AM
Tom Bruhns
 
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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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Old November 25th 03, 02:03 AM
Tom Bruhns
 
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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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