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2009-05-14 Stefan Jahn <stefan@lkcc.org>

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* coax.cpp (show_results): Fixed computation of cut-off
        frequencies.
This commit is contained in:
ela 2009-05-14 18:14:16 +00:00
parent b0fde232c2
commit a2eed82728
2 changed files with 11 additions and 6 deletions
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5
qucs-transcalc/ChangeLog
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@ -1,3 +1,8 @@
2009-05-14 Stefan Jahn <stefan@lkcc.org>
* coax.cpp (show_results): Fixed computation of cut-off
frequencies.
2008-06-29 Stefan Jahn <stefan@lkcc.org>
* qucstrans.cpp (slotCopyToClipBoard): Added clipboard copy for

12
qucs-transcalc/coax.cpp
View File

@ -3,7 +3,7 @@
*
* Copyright (C) 2001 Gopal Narayanan <gopal@astro.umass.edu>
* Copyright (C) 2002 Claudio Girardi <claudio.girardi@ieee.org>
* Copyright (C) 2005, 2006 Stefan Jahn <stefan@lkcc.org>
* Copyright (C) 2005, 2006, 2009 Stefan Jahn <stefan@lkcc.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -188,25 +188,25 @@ void coax::show_results()
setResult (1, atten_dielectric, "dB");
n = 1;
fc = C0 / (M_PI * (dout + din)/(double) n);
fc = C0 / sqrt (er * mur) / (M_PI_2 * (dout + din)/(double) n);
setResult (2, "none");
if (fc <= f) {
char text[256], txt[256];
strcpy (text, "TE(1,1) ");
m = 2;
fc = C0 / (2 * (dout - din)/(double) (m-1));
fc = C0 / sqrt (er * mur) / (M_PI_2 * (dout + din)/(double) m);
while ((fc <= f) && (m<10)) {
sprintf(txt, "TE(n,%d) ",m);
strcat(text,txt);
m++;
fc = C0 / (2 * (dout - din)/(double) (m-1));
fc = C0 / sqrt (er * mur) / (M_PI_2 * (dout + din)/(double) m);
}
setResult (2, text);
}
setResult (3, "none");
m = 1;
fc = C0 / (2 * (dout - din)/(float) m);
fc = C0 / sqrt (er * mur) / ((dout - din)/(float) m);
if (fc <= f) {
char text[256], txt[256];
strcpy (text, "");
@ -214,7 +214,7 @@ void coax::show_results()
sprintf(txt, "TM(n,%d) ",m);
strcat(text,txt);
m++;
fc = C0 / (2 * (dout - din)/(double) m);
fc = C0 / sqrt (er * mur) / ((dout - din)/(double) m);
}
setResult (3, text);
}