From: Thomas F. B. <tho...@gm...> - 2006-05-12 13:38:36
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Dear QUCS-team! First of all: Great Job you did, and you are still doing! I have two suggestions to improve the program: 1. Suggestion: When drawing the circuit of MicroStripLine it is not clear which end is which port. For instance, for the Tee the widths w1, w2 and w3 appear in the drawing but not the port designation itself. I guess the port with the two tiny dashes is port 1, but the others? I attached a png-file "MSL_portnumbering.png" to illustrate what I mean. There I wrote to each port the port number (which may not be true!). It would be nice to print the port numbers into the schematic. 2. Suggestion: The reference planes of e.g. a MSL-Tee or a MSL-Cross are not given, at least I did not see it. It is quite cumbersome to check the related literature (mainly old publications) to find something about the reference planes. Since there are several possibilities to define the reference planes of e.g. a MSL-Tee or a MSL-Cross it would be good to give those reference planes in the documentation. Again, to illustrate my problem, I attached two files named "MSL_reference.png" and "MSL_coupler.png" which show two of several possibilities. In the figure "MSL_coupler.png" it is (hopefully) obvious that the physical layout and therefore the electrical performance of the MSL circuit which will be produced, depends on the reference planes. (By the way, the reference planes shown in case A are those used in the program Linmic.) So far so good, and thanx for your time and efforts Thomas Bechteler ========================================= Dr. Thomas F. Bechteler Izmir Institute of Technology Faculty of Engineering Department of Electrical and Electronics Engineering TR-35430 Gulbahcekoyu, Urla/Izmir Turkey Tel.: +90 / 232 / 750-6348 FAX : +90 / 232 / 750-6196 e-mail: tho...@iy... ========================================= -- "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail |
From: Stefan J. <st...@gr...> - 2006-05-16 08:22:34
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Am Fr, 12.05.2006, 15:38, schrieb Thomas F. Bechteler: > Dear QUCS-team! Hello Thomas, > First of all: Great Job you did, and you are still doing! Thanks a lot... > I have two suggestions to improve the program: > > 1. Suggestion: > > When drawing the circuit of MicroStripLine it is not clear > which end is which port. > For instance, for the Tee the widths w1, w2 and w3 appear > in the drawing but not the port designation itself. I guess the > port with the two tiny dashes is port 1, but the others? > I attached a png-file "MSL_portnumbering.png" to illustrate > what I mean. There I wrote to each port the port number > (which may not be true!). > It would be nice to print the port numbers into the schematic. The tiny dash is indeed port 1. Then the side the dash points to the device (is nearer to it) the port numbering advances. So by default (if not mirrored) right around. So this is by convention. > 2. Suggestion: > > The reference planes of e.g. a MSL-Tee or a MSL-Cross > are not given, at least I did not see it. It is quite cumbersome > to check the related literature (mainly old publications) to find > something about the reference planes. > Since there are several possibilities to define the reference planes of > e.g. a MSL-Tee or a MSL-Cross it would be good to give those > reference planes in the documentation. > Again, to illustrate my problem, I attached two files named > "MSL_reference.png" and "MSL_coupler.png" which show two > of several possibilities. In the figure "MSL_coupler.png" it is > (hopefully) obvious that the physical layout and therefore the > electrical performance of the MSL circuit which will be produced, > depends on the reference planes. (By the way, the reference planes > shown in case A are those used in the program Linmic.) The reference plane thing is difficult to tell because it depends on the underlying models. When using these kind of components were the details really matter it's always a good idea to look at the technical papers. Please see: <http://qucs.sourceforge.net/docs/technical.pdf> or also have a look at <http://qucs.sourceforge.net/docs.html>. Cheers, Stefan. |