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

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