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Add MOPEN to MS QW BSF

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In this commit an MS open circuit is added to the QW BSF as it was missing. It models the fringing effects of the stub.
This commit is contained in:
andresmmera 2024-06-17 17:27:00 +02:00
parent de5e535123
commit 4eb2dad70d
3 changed files with 34 additions and 3 deletions
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24
qucs-filter/filter.cpp
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@ -415,6 +415,30 @@ QString Filter::getMS_Via(double height, int x, int y, int rotate)
return code;
}
QString Filter::getMS_Open(double width, int x, int y, int rotate)
{
QString code;
switch (rotate)
{
case 0: // No rotation
code = QString("<MOPEN MS93 1 %1 %2 -20 -50 0 0 \"Sub1\" 0 \"%3 mm\" 1 \"Hammerstad\" 0 \"Kirschning\" 0 \"Kirschning\" 0>\n").arg(x).arg(y).arg(QString::number(width*1e3, 'f', 2));
break;
case 1: // CTRL+R
code = QString("<MOPEN MS93 1 %1 %2 15 -12 0 1 \"Sub1\" 0 \"%3 mm\" 1 \"Hammerstad\" 0 \"Kirschning\" 0 \"Kirschning\" 0>\n").arg(x).arg(y).arg(QString::number(width*1e3, 'f', 2));
break;
case 2: // 2 x (CTRL+R)
code = QString("<MOPEN MS93 1 %1 %2 -20 -50 0 2 \"Sub1\" 0 \"%3 mm\" 1 \"Hammerstad\" 0 \"Kirschning\" 0 \"Kirschning\" 0>\n").arg(x).arg(y).arg(QString::number(width*1e3, 'f', 2));
break;
case 3: // 3 x (CTRL+R)
code = QString("<MOPEN MS93 1 %1 %2 15 -20 0 3 \"Sub1\" 0 \"%3 mm\" 1 \"Hammerstad\" 0 \"Kirschning\" 0 \"Kirschning\" 0>\n").arg(x).arg(y).arg(QString::number(width*1e3, 'f', 2));
break;
}
return code;
}
QString Filter::getWireString(int x1, int y1, int x2, int y2)
{
return QString("<%1 %2 %3 %4 \"\" 0 0 0>\n").arg(x1).arg(y1).arg(x2).arg(y2);

2
qucs-filter/filter.h
View File

@ -70,6 +70,8 @@ public:
static QString getTeeString(int x, int y, double width1, double width2, double width3);
static QString getWireString(int x1, int x2, int x3, int x4);
static QString getMS_Via(double height, int x, int y, int rotate);
static QString getMS_Open(double width, int x, int y, int rotate);
protected:
static QString num2str(double);

11
qucs-filter/quarterwave_filter.cpp
View File

@ -92,7 +92,11 @@ QString *QuarterWave_Filter::createSchematic(tFilter *Filter, tSubstrate *Substr
c_s += getLineString(isMicrostrip, W_line, L_line, x, 180, 0); // Series line
c_s += getTeeString(x+ 60 + x_space, 180, W_line, W_line, W_res);
c_s += getLineString(isMicrostrip, W_res, L_res, x+60 + x_space, 60, 1); // Shunt quarter-wavelength resonator
c_s += getLineString(isMicrostrip, W_res, L_res, x + 60 + x_space, 60, 1); // Shunt quarter-wavelength resonator
if (Filter->Class == CLASS_BANDSTOP){// If MS bandstop, add MOPEN
c_s += getMS_Open(W_res, x + 60 + x_space, 0, 1); // MS open
}
w_s += getWireString(x+30, 180, x+30+x_space, 180);
w_s += getWireString(x+60 + x_space, 90, x+60 + x_space, 150);
@ -106,14 +110,15 @@ QString *QuarterWave_Filter::createSchematic(tFilter *Filter, tSubstrate *Substr
w_s += getWireString(x+30, 180, x+90+2*x_space, 180);// Join series lines
w_s += getWireString(x+60 + x_space, 90, x+60 + x_space, 180); // Join middle point with the stub
}
if (Filter->Class == CLASS_BANDPASS) // If bandpass, shunt resonators
if (Filter->Class == CLASS_BANDPASS){
// If bandpass, shunt resonators
if (isMicrostrip){
c_s += getMS_Via(0.5, x+40 + x_space, 30, 2); // MS via diameter = 0.5 mm
}
else{
c_s += QString("<GND * 1 %1 30 0 0 1 0>\n").arg(x + 60 + x_space);
}
}
x += 120 + 2 * x_space;
}