See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

I suspect that they are perhaps due to a distributed R-L-C network?

What think ye all?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

"Jim Thompson" wrote in
message ...
See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

There's a series of articles in Practical Wireless starting last month
called something like - Smith charts for the slightly miffed, but I think
its probably more basic than you want.

On Sun, 25 May 2008 17:06:35 +0100, "ian field"
wrote:


"Jim Thompson" wrote in
message ...
See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

There's a series of articles in Practical Wireless starting last month
called something like - Smith charts for the slightly miffed, but I think
its probably more basic than you want.


Don't be too sure ;-) It's been a very long time ago. Is "Practical
Wireless" web-accessible?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

Jim Thompson wrote:
On Sun, 25 May 2008 17:06:35 +0100, "ian field"
wrote:

"Jim Thompson" wrote in
message ...
See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?
There's a series of articles in Practical Wireless starting last month
called something like - Smith charts for the slightly miffed, but I think
its probably more basic than you want.


Don't be too sure ;-) It's been a very long time ago. Is "Practical
Wireless" web-accessible?



Multiple resonances can look a lot wilder than your chart, almost like a
coughed-up hairball. Take a peek at figure 3:

http://publications.drdo.gov.in/ojs/...iewFile/234/86

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

On Sun, 25 May 2008 07:46:56 -0700, Jim Thompson
wrote:

See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

I suspect that they are perhaps due to a distributed R-L-C network?

What think ye all?

...Jim Thompson

---
http://en.wikipedia.org/wiki/Smith_chart ;-)

JF

On Sun, 25 May 2008 09:35:11 -0700, Joerg
wrote:

Jim Thompson wrote:
On Sun, 25 May 2008 17:06:35 +0100, "ian field"
wrote:

"Jim Thompson" wrote in
message ...
See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?
There's a series of articles in Practical Wireless starting last month
called something like - Smith charts for the slightly miffed, but I think
its probably more basic than you want.


Don't be too sure ;-) It's been a very long time ago. Is "Practical
Wireless" web-accessible?



Multiple resonances can look a lot wilder than your chart, almost like a
coughed-up hairball. Take a peek at figure 3:

http://publications.drdo.gov.in/ojs/...iewFile/234/86

In simplistic terms, my plot is a water-filled capacitor ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave

Jim Thompson wrote:
On Sun, 25 May 2008 09:35:11 -0700, Joerg
wrote:

Jim Thompson wrote:
On Sun, 25 May 2008 17:06:35 +0100, "ian field"
wrote:

"Jim Thompson" wrote in
message ...
See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?
There's a series of articles in Practical Wireless starting last month
called something like - Smith charts for the slightly miffed, but I think
its probably more basic than you want.

Don't be too sure ;-) It's been a very long time ago. Is "Practical
Wireless" web-accessible?


Multiple resonances can look a lot wilder than your chart, almost like a
coughed-up hairball. Take a peek at figure 3:

http://publications.drdo.gov.in/ojs/...iewFile/234/86

In simplistic terms, my plot is a water-filled capacitor ;-)


Nah, must be filled with beer or champagne because of all them bubbles :-)

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

"Jim Thompson" wrote in
message ...
On Sun, 25 May 2008 17:06:35 +0100, "ian field"
wrote:


"Jim Thompson" wrote in
message ...
See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

There's a series of articles in Practical Wireless starting last month
called something like - Smith charts for the slightly miffed, but I think
its probably more basic than you want.


Don't be too sure ;-) It's been a very long time ago. Is "Practical
Wireless" web-accessible?

Don't know - maybe someone's put a pirate copy on their webpage.

They'll do photocopies of the original, but it might be expensive posted to
the US.

On Sun, 25 May 2008 07:46:56 -0700, Jim Thompson
wrote:

See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

I suspect that they are perhaps due to a distributed R-L-C network?

What think ye all?

...Jim Thompson
Hi Jim

Here is the table of contents of the book I mentioned down in SED.Part
of chapter 1 is included.

On Sun, 25 May 2008 23:13:56 GMT, Hammy wrote:

On Sun, 25 May 2008 07:46:56 -0700, Jim Thompson
wrote:

See attachment.

I'm trying to remember from 40+ years back, when I last used a Smith
Chart... what do the circular patterns mean?

I suspect that they are perhaps due to a distributed R-L-C network?

What think ye all?

...Jim Thompson
Hi Jim

Here is the table of contents of the book I mentioned down in SED.Part
of chapter 1 is included.

Thanks!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

America: Land of the Free, Because of the Brave