mirror of
https://github.com/ra3xdh/qucs_s
synced 2025-03-28 21:13:26 +00:00
Reflection attenuator synthesis
It was added the reflection type synthesis to qucsattenuator. The synthesis equations can be found here: https://www.microwaves101.com/encyclopedias/reflection-attenuators
This commit is contained in:
andresmmera
parent
9299beb955
commit
c84e024f69
@ -68,6 +68,16 @@ int QUCS_Att::Calc(tagATT *ATT)
|
||||
ATT->R2 = ATT->Zin / (L - 1);
|
||||
break;
|
||||
}
|
||||
case REFLECTION_TYPE:
|
||||
{
|
||||
L = pow(10, 0.05*ATT->Attenuation);
|
||||
if (ATT->minR)
|
||||
ATT->R1 = ATT->Zin*(L + 1)/(L - 1);
|
||||
else
|
||||
ATT->R1 = ATT->Zin*(L - 1)/(L + 1);
|
||||
ATT->R2 = ATT->R1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
@ -250,6 +260,73 @@ QString* QUCS_Att::createSchematic(tagATT *ATT, bool SP_box)
|
||||
}
|
||||
*s += "</Paintings>\n";
|
||||
break;
|
||||
|
||||
case REFLECTION_TYPE:
|
||||
*s += QString("<R R1 1 130 300 15 -26 0 1 \"%1\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(ATT->R1);
|
||||
*s += "<GND * 1 130 330 0 0 0 0>\n";
|
||||
*s += QString("<Coupler X1 5 200 200 29 -26 0 1 \"0.7071\" 0 \"90\" 0 \"%1\" 0>\n").arg(ATT->Zin);
|
||||
*s += QString("<R R1 1 270 300 15 -26 0 1 \"%1\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(ATT->R1);
|
||||
*s += "<GND * 1 270 330 0 0 0 0>\n";
|
||||
|
||||
if (SP_box)
|
||||
{
|
||||
// S-parameter simulation block
|
||||
//-----------------------------
|
||||
// Resistor attenuators are broadband ckts, so it's pointless to ask the user to input the analysis freq sweep. Let's do a wideband
|
||||
// sweep and then the user can modify that in the schematic
|
||||
*s += "<.SP SP1 1 80 400 0 83 0 0 \"lin\" 1 \"50 MHz\" 1 \"3 GHz\" 1 \"200\" 1 \"no\" 0 \"1\" 0 \"2\" 0 \"no\" 0 \"no\" 0>\n";
|
||||
|
||||
// Equations
|
||||
*s += "<Eqn Eqn1 1 300 400 -32 19 0 0 \"S21_dB=dB(S[2,1])\" 1 \"S11_dB=dB(S[1,1])\" 1 \"S22_dB=dB(S[2,2])\" 1 \"yes\" 0>\n";
|
||||
|
||||
// Input term
|
||||
*s += QString("<Pac P1 1 50 200 -100 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zin);
|
||||
*s += "<GND * 1 50 230 0 0 0 0>\n";
|
||||
|
||||
// Output term
|
||||
*s += QString("<Pac P1 1 350 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
|
||||
*s += "<GND * 1 350 230 0 0 0 0>\n";
|
||||
}
|
||||
*s += "</Components>\n";
|
||||
|
||||
*s += "<Wires>\n";
|
||||
//First resistor to the coupler
|
||||
*s += "<130 270 130 250 \"\" 0 0 0 \"\">\n";
|
||||
*s += "<130 250 180 250 \"\" 0 0 0 \"\">\n";
|
||||
*s += "<180 230 180 250 \"\" 0 0 0 \"\">\n";
|
||||
|
||||
//Second resistor to the coupler
|
||||
*s += "<270 270 270 250 \"\" 0 0 0 \"\">\n";
|
||||
*s += "<270 250 220 250 \"\" 0 0 0 \"\">\n";
|
||||
*s += "<220 230 220 250 \"\" 0 0 0 \"\">\n";
|
||||
|
||||
*s += "<100 170 180 170 \"\" 0 0 0 \"\">\n";
|
||||
*s += "<220 170 300 170 \"\" 0 0 0 \"\">\n";
|
||||
|
||||
if (SP_box)
|
||||
{ // Additional wiring because of the input/output ports
|
||||
|
||||
// Input port
|
||||
*s += "<50 170 100 170 \"\" 0 0 0 \"\">\n";
|
||||
|
||||
// Output port
|
||||
*s += "<300 170 350 170 \"\" 0 0 0 \"\">\n";
|
||||
}
|
||||
*s += "</Wires>\n";
|
||||
|
||||
*s += "<Diagrams>\n";
|
||||
*s += "</Diagrams>\n";
|
||||
*s += "<Paintings>\n";
|
||||
*s += QString("<Text 100 100 12 #000000 0 \"%1 dB Reflection Attenuator\">\n").arg(ATT->Attenuation);
|
||||
if (!SP_box)
|
||||
{// If the SP simulation box option is activated, then the input and output ports are attached.
|
||||
// Thus, it doesn't make sense to have a text field indicating the input/output impedance
|
||||
*s += QString("<Text 70 135 10 #000000 0 \"Z0: %1 Ohm\">\n").arg(ATT->Zin);
|
||||
*s += QString("<Text 270 135 10 #000000 0 \"Z0: %1 Ohm\">\n").arg(ATT->Zout);
|
||||
}
|
||||
*s += "</Paintings>\n";
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return s;
|
||||
|
||||
@ -16,6 +16,7 @@
|
||||
#define PI_TYPE 0
|
||||
#define TEE_TYPE 1
|
||||
#define BRIDGE_TYPE 2
|
||||
#define REFLECTION_TYPE 3
|
||||
|
||||
#include <cmath>
|
||||
|
||||
@ -29,6 +30,7 @@ struct tagATT
|
||||
double R1;
|
||||
double R2;
|
||||
double R3;
|
||||
bool minR; //Only for the reflection attenuator
|
||||
};
|
||||
|
||||
class QString;
|
||||
|
||||
0
qucs-attenuator/bitmaps/att_reflection.png
Normal file
0
qucs-attenuator/bitmaps/att_reflection.png
Normal file
@ -86,6 +86,7 @@ QucsAttenuator::QucsAttenuator()
|
||||
ComboTopology->insertItem(1, "Pi");
|
||||
ComboTopology->insertItem(2, "Tee");
|
||||
ComboTopology->insertItem(3, "Bridged Tee");
|
||||
ComboTopology->insertItem(4, "Reflection attenuator");
|
||||
connect(ComboTopology, SIGNAL(activated(int)), SLOT(slotTopologyChanged()));
|
||||
topoGrid->addWidget(ComboTopology, 1,0,1,2);
|
||||
|
||||
@ -143,6 +144,10 @@ QucsAttenuator::QucsAttenuator()
|
||||
QLabel *Label3 = new QLabel(tr("Ohm"), InputGroup);
|
||||
inGrid->addWidget(Label3, 3,2);
|
||||
|
||||
// Reflection attenuator only
|
||||
minR_Reflection_Att = new QCheckBox("Use R > Z0");
|
||||
inGrid->addWidget(minR_Reflection_Att, 4,0);
|
||||
|
||||
InputGroup->setLayout(inGrid);
|
||||
|
||||
vboxRight->addWidget(InputGroup);
|
||||
@ -250,7 +255,7 @@ void QucsAttenuator::slotQuit()
|
||||
|
||||
void QucsAttenuator::slotSetText_Zin( const QString &text )
|
||||
{
|
||||
if(ComboTopology->currentIndex() == BRIDGE_TYPE) {
|
||||
if((ComboTopology->currentIndex() == BRIDGE_TYPE) || (ComboTopology->currentIndex() == REFLECTION_TYPE)) {
|
||||
lineEdit_Zout->blockSignals( true );
|
||||
lineEdit_Zout->setText( text );
|
||||
lineEdit_Zout->blockSignals( false );
|
||||
@ -276,6 +281,7 @@ void QucsAttenuator::slotTopologyChanged()
|
||||
LabelR3->show();
|
||||
lineEdit_R3->show();
|
||||
LabelR3_Ohm->show();
|
||||
minR_Reflection_Att->hide();
|
||||
break;
|
||||
case TEE_TYPE:
|
||||
pixTopology->setPixmap(QPixmap((":/bitmaps/att_tee.png")));
|
||||
@ -283,6 +289,7 @@ void QucsAttenuator::slotTopologyChanged()
|
||||
LabelR3->show();
|
||||
lineEdit_R3->show();
|
||||
LabelR3_Ohm->show();
|
||||
minR_Reflection_Att->hide();
|
||||
break;
|
||||
case BRIDGE_TYPE:
|
||||
pixTopology->setPixmap(QPixmap((":/bitmaps/att_bridge.png")));
|
||||
@ -291,6 +298,16 @@ void QucsAttenuator::slotTopologyChanged()
|
||||
lineEdit_R3->hide();
|
||||
LabelR3_Ohm->hide();
|
||||
lineEdit_Zout->setText( lineEdit_Zin->text() );
|
||||
minR_Reflection_Att->hide();
|
||||
break;
|
||||
case REFLECTION_TYPE:
|
||||
pixTopology->setPixmap(QPixmap((":/bitmaps/att_reflection.png")));
|
||||
LabelR2->setText("R2:");
|
||||
LabelR3->hide();
|
||||
lineEdit_R3->hide();
|
||||
LabelR3_Ohm->hide();
|
||||
lineEdit_Zout->setText( lineEdit_Zin->text() );
|
||||
minR_Reflection_Att->show();
|
||||
break;
|
||||
}
|
||||
adjustSize();
|
||||
@ -308,6 +325,7 @@ void QucsAttenuator::slotCalculate()
|
||||
Values.Attenuation = lineEdit_Attvalue->text().toDouble();
|
||||
Values.Zin = lineEdit_Zin->text().toDouble();
|
||||
Values.Zout = lineEdit_Zout->text().toDouble();
|
||||
Values.minR = minR_Reflection_Att->isChecked();
|
||||
result = qatt.Calc(&Values);
|
||||
|
||||
if(result != -1)
|
||||
|
||||
@ -63,7 +63,7 @@ class QucsAttenuator : public QMainWindow
|
||||
QLineEdit *lineEdit_R1, *lineEdit_R2, *lineEdit_R3, *lineEdit_Results;
|
||||
QPushButton *Calculate;
|
||||
QDoubleValidator *DoubleVal;
|
||||
QCheckBox *SparBoxCheckbox;
|
||||
QCheckBox *SparBoxCheckbox, *minR_Reflection_Att;
|
||||
};
|
||||
|
||||
#endif
|
||||
|
||||
@ -4,5 +4,6 @@
|
||||
<file>bitmaps/att_pi.png</file>
|
||||
<file>bitmaps/att_tee.png</file>
|
||||
<file>bitmaps/big.qucs.xpm</file>
|
||||
<file>bitmaps/att_reflection.png</file>
|
||||
</qresource>
|
||||
</RCC>
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user