Microstrip formula for non-standard geometry
 

On Wed, 27 Aug 2008 17:04:19 -0700 (PDT), K7ITM wrote:

On Aug 27, 11:25*am, qrk wrote:
On Tue, 26 Aug 2008 11:02:15 -0700 (PDT), Wimpie
wrote:



On 26 ago, 19:38, qrk wrote:
On Tue, 26 Aug 2008 10:02:47 -0700 (PDT), Wimpie
wrote:

Hello,

Most formulas for microstrip transmission line assume that there is
dielectric all over the ground plane.

Does somebody know a formula (or graphical solution) for the
characteristic impedance of a microstrip where there is only
dielectric material under the strip (so you can see the ground
plane)?

Best regards,

Wim
PA3DJS
www.tetech.nl
The mail address is valid when you remove abc

http://atlc.sourceforge.net/
The above link is a wonderful arbitrary solver for transmission lines.
This is primarily a Unix program. If you need a Windows build of the
program, I probably have version 4.4 somewhere.

--
Mark

Hello Mark,

This is good one (I found it via google also). You can enter both
metallics and dielectrics as you want. *It would be very nice when you
can mail me a Windows Build (I hope it is not that big). *A link would
also be useful.

My address is valid when you remove abc.

Best regards and thanks,

Wim
PA3DJS
www.tetech.nl

I will keep this on the web site for a few days. About 3MB download.http://qrkwiggles.googlepages.com/atlc-4.4.4_Win32.zip

This version has problems with muliple dielectrics. I works fine with
two dielectrics, air and one of your choosing.

--
Mark

The version I have, which I sent to Wim, is 4.6.0. I'm not sure about
the differences, but if anyone is interested, I have it in a zip file
I can send. The zip file is encrypted, so it will pass through at
least some of the email filters that take out executables or zips with
embedded executables; I'll supply the password of course (just my
call...).

Cheers,
Tom

4.6.0 is the latest version which fixes the multiple dielectric
problem. I believe this version is had multiple processor support
removed since the author had problems getting it running properly.

Where did you get the Windows build from? My work colleague was the
last one to supply Dr. Kirkby a windows build which was ver 4.4.4. It
would be great if you could give Dr. Kirkby the latest windows build
so he can post it.

--
Mark

Microstrip formula for non-standard geometry
 

On Aug 28, 10:55*am, qrk wrote:
On Wed, 27 Aug 2008 17:04:19 -0700 (PDT), K7ITM wrote:
On Aug 27, 11:25*am, qrk wrote:
On Tue, 26 Aug 2008 11:02:15 -0700 (PDT), Wimpie
wrote:

On 26 ago, 19:38, qrk wrote:
On Tue, 26 Aug 2008 10:02:47 -0700 (PDT), Wimpie
wrote:

Hello,

Most formulas for microstrip transmission line assume that there is
dielectric all over the ground plane.

Does somebody know a formula (or graphical solution) for the
characteristic impedance of a microstrip where there is only
dielectric material under the strip (so you can see the ground
plane)?

Best regards,

Wim
PA3DJS
www.tetech.nl
The mail address is valid when you remove abc

http://atlc.sourceforge.net/
The above link is a wonderful arbitrary solver for transmission lines.
This is primarily a Unix program. If you need a Windows build of the
program, I probably have version 4.4 somewhere.

--
Mark

Hello Mark,

This is good one (I found it via google also). You can enter both
metallics and dielectrics as you want. *It would be very nice when you
can mail me a Windows Build (I hope it is not that big). *A link would
also be useful.

My address is valid when you remove abc.

Best regards and thanks,

Wim
PA3DJS
www.tetech.nl

I will keep this on the web site for a few days. About 3MB download.http://qrkwiggles.googlepages.com/atlc-4.4.4_Win32.zip

This version has problems with muliple dielectrics. I works fine with
two dielectrics, air and one of your choosing.

--
Mark

The version I have, which I sent to Wim, is 4.6.0. *I'm not sure about
the differences, but if anyone is interested, I have it in a zip file
I can send. *The zip file is encrypted, so it will pass through at
least some of the email filters that take out executables or zips with
embedded executables; I'll supply the password of course (just my
call...).

Cheers,
Tom

4.6.0 is the latest version which fixes the multiple dielectric
problem. I believe this version is had multiple processor support
removed since the author had problems getting it running properly.

Where did you get the Windows build from? My work colleague was the
last one to supply Dr. Kirkby a windows build which was ver 4.4.4. It
would be great if you could give Dr. Kirkby the latest windows build
so he can post it.

--
Mark

Ah, OK; I thought from the atlc website that we'd just all be on our
own to do it. I'm an analog guy; I enlisted the help of a digital/
software friend. He had no trouble building it to run in a DOS
shell. I'll drop David a note, letting him know that I have it, to
see if he'd like it there.

Cheers,
Tom

Microstrip formula for non-standard geometry
 

qrk wrote:
http://atlc.sourceforge.net/
[...]arbitrary solver for transmission lines.
This is primarily a Unix program. If you need a Windows build[...]

I will keep this on the web site for a few days. About 3MB download.
http://qrkwiggles.googlepages.com/atlc-4.4.4_Win32.zip
This version has problems with muliple dielectrics.

K7ITM wrote:
The version I have, which I sent to Wim, is 4.6.0
Tom

Note to Tom:
If you are going to continue to post via Google, you should read this:
http://groups.google.com/group/sci.e...+get.butchered

qrk wrote:
4.6.0 is the latest version
which fixes the multiple dielectric problem.
Where did you get the Windows build[ ]?

Pursuing this via Google,
http://www.google.com/search?q=%2Bat...2+-4.4.4+mdtlc
(Why they won't give you, by default, WHAT YOU ASK FOR
http://www.google.com/search?q=atlc+Win32+-4.4.4
really ****es me off.)

Anyway, I discovered !!!
http://www.google.com/search?q=cache...ine.Calculator

Microstrip formula for non-standard geometry
 

"JeffM" wrote in message ...

Anyway, I discovered !!!
http://www.google.com/search?q=cache...ine.Calculator

I'm just downloading mdtl from sourceforge, will give it a try as soon as I find some free time.
Cool link, thanks for some detective work :)

M