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qucs_s/qucs-attenuator/attenuatorfunc.cpp
andresmmera d52a5f46ac Add shunt resistor attenuator 
The shunt resistor attenuator is unmatched at both ports. The input and output impedance is shown in a box.
The derivation of the design equations will be provided separately in the pull request
2024-05-16 17:42:41 +02:00

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/****************************************************************************
** Qucs Attenuator Synthesis
** attenuatorfunc.cpp
**
** since 2006/6/14
**
**
**
**
**
*****************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "attenuatorfunc.h"
#include <QString>
// References:
// [1] RF design guide. Systems, circuits, and equations. Peter Vizmuller. Artech House, 1995
// [2] The PIN diode circuit designer's handbook. W.E. Doherty, Jr., R.D. Joos, Microsemi Corp., 1998
QUCS_Att::QUCS_Att(){}
QUCS_Att::~QUCS_Att(){}
int QUCS_Att::Calc(tagATT *ATT)
{
double Lmin, L, A;
L = pow(10, ATT->Attenuation / 10);
A = (L + 1) / (L - 1);
//Check minumum attenuation for Pi and Tee type attenuators
if ((ATT->Topology == PI_TYPE) || (ATT->Topology == TEE_TYPE))
{
if(ATT->Zin > ATT->Zout)
{
Lmin = (2 * ATT->Zin / ATT->Zout) - 1 + 2 *
sqrt(ATT->Zin / ATT->Zout * (ATT->Zin / ATT->Zout - 1));
}
else
{
Lmin = (2 * ATT->Zout / ATT->Zin) - 1 + 2 *
sqrt(ATT->Zout / ATT->Zin * (ATT->Zout / ATT->Zin - 1));
}
ATT->MinimumATT = 10 * log10(Lmin);
if(ATT->MinimumATT > ATT->Attenuation)
{
return -1;
}
}
switch(ATT->Topology)
{
case PI_TYPE:
{
//Design equations [1]
ATT->R2 = ((L - 1) / 2) * sqrt(ATT->Zin * ATT->Zout / L);
ATT->R1 = 1 / (((A / ATT->Zin)) - (1 / ATT->R2));
ATT->R3 = 1 / (((A / ATT->Zout)) - (1 / ATT->R2));
//Power dissipation
ATT->PR1 = ATT->Pin*(ATT->Zin/ATT->R1);//[W]
ATT->PR2 = ATT->Pin*(ATT->R2*pow(ATT->R1-ATT->Zin,2)/(ATT->R1*ATT->R1*ATT->Zin));//[W]
ATT->PR3 = ATT->Pin*(pow(ATT->R1*ATT->R2-ATT->Zin*(ATT->R1+ATT->R2),2))/(ATT->R1*ATT->R1*ATT->R3*ATT->Zin);//[W]
break;
}
case TEE_TYPE:
{
//Design equations [1]
ATT->R2 = (2 * sqrt(L * ATT->Zin * ATT->Zout)) / (L - 1);
ATT->R1 = ATT->Zin * A - ATT->R2;
ATT->R3 = ATT->Zout * A - ATT->R2;
//Power dissipation
ATT->PR1 = ATT->Pin*(ATT->R1/ATT->Zin);//[W]
ATT->PR2 = ATT->Pin*(pow(ATT->R1-ATT->Zin,2))/(ATT->R2*ATT->Zin);//[W]
ATT->PR3 = ATT->Pin*(ATT->R3*pow(ATT->R1+ATT->R2-ATT->Zin,2)/(ATT->Zin*ATT->R2*ATT->R2));//[W]
break;
}
case BRIDGE_TYPE:
{
//Design equations [1]
L = pow(10, ATT->Attenuation / 20);
ATT->R1 = ATT->Zin * (L - 1);
ATT->R2 = ATT->Zin / (L - 1);
ATT->R3 = ATT->Zin;//Z01
ATT->R4 = ATT->Zin;//Z02
//Power dissipation
ATT->PR1 = ATT->Pin*((4*ATT->R1*ATT->R2*ATT->R2*ATT->Zin)/(pow(ATT->R1*ATT->R2+ATT->Zin*(2*ATT->R2+ATT->Zin),2)));//[W]
ATT->PR2 = ATT->Pin*(4*ATT->R2*ATT->Zin*ATT->Zin*ATT->Zin)/pow(ATT->R1*ATT->R2+ATT->Zin*(2*ATT->R2+ATT->Zin),2);//[W]
ATT->PR3 = ATT->Pin*(pow(ATT->R1*ATT->R2+ATT->Zin*ATT->Zin,2)/pow(ATT->R1*ATT->R2+ATT->Zin*(2*ATT->R2+ATT->Zin),2));//[W]
ATT->PR4 = 0;//Z02 dissipates no power.
break;
}
case REFLECTION_TYPE:
{
//Design equations [2]
L = pow(10, ATT->Attenuation / 20);
if (ATT->minR)
ATT->R1 = ATT->Zin*(L + 1)/(L - 1);
else
ATT->R1 = ATT->Zin*(L - 1)/(L + 1);
ATT->R2 = ATT->R1;
//Power dissipation. Both resistors dissipate the same power
ATT->PR1 = 0.5*ATT->Pin*(1-pow(abs((ATT->Zin-ATT->R1)/(ATT->Zin+ATT->R1)),2));
ATT->PR2 = ATT->PR1;
break;
}
case QW_SERIES_TYPE:
{
//Design equations [2]
L = pow(10, 0.05*ATT->Attenuation);
ATT->R1 = ATT->Zin/(L-1);
ATT->R2 = ATT->Zin;
ATT->R3 = ATT->R1;
ATT->R4 = (ATT->R1*ATT->R1*ATT->Zin + 2*ATT->R1*ATT->Zin*ATT->Zin)/(ATT->R1*ATT->R1 + 2*ATT->R1*ATT->Zin+2*ATT->Zin*ATT->Zin); // Zout
ATT->L = 0.25*C0/ATT->freq;//lambda/4
//Power dissipation.
ATT->PR1 = ATT->Pin*ATT->R1*ATT->Zin/pow(ATT->R1 + ATT->Zin,2);
ATT->PR2 = ATT->Pin*ATT->Zin*ATT->Zin/pow(ATT->R1 + ATT->Zin,2);
ATT->PR3 = ATT->PR1;
break;
}
case QW_SHUNT_TYPE:
{
//Design equations [2]
L = pow(10, 0.05*ATT->Attenuation);
ATT->R1 = ATT->Zin*(L-1);
ATT->R2 = ATT->Zin;
ATT->R3 = ATT->R1;
ATT->R4 = ATT->R1 + ATT->Zin*(ATT->R1+ATT->Zin)/(2*ATT->R1+ATT->Zin); // Zout
ATT->L = 0.25*C0/ATT->freq;//lambda/4
//Power dissipation.
ATT->PR1 = ATT->Pin*ATT->R1*ATT->Zin/pow(ATT->R1 + ATT->Zin,2);
ATT->PR2 = ATT->Pin*ATT->R1*ATT->R1/pow(ATT->R1 + ATT->Zin,2);
ATT->PR3 = ATT->PR1;
break;
}
case L_PAD_1ST_SERIES:
{
L = pow(10, -ATT->Attenuation / 10);
// Design equations
ATT->R1 = -ATT->Zin*(L-1)/(sqrt(L)+1);// Series resistor
ATT->R2 = -ATT->Zin*(L + sqrt(L))/(L - 1); // Shunt resistor
ATT->R3 = ATT->R2*(ATT->R1+ATT->Zin)/(ATT->R1+ATT->R2+ATT->Zin);//Output impedance
// Power dissipation
ATT->PR1 = ATT->Pin*(1-sqrt(L));// Series resistor
ATT->PR2 = ATT->Pin*L*(1-L)/(L+sqrt(L));// Shunt resistor
break;
}
case L_PAD_1ST_SHUNT:
{
L = pow(10, -ATT->Attenuation / 10);
// Design equations
ATT->R1 = ATT->Zin/(1-sqrt(L));// Shunt resistor
ATT->R2 = ATT->Zin*(1-sqrt(L))/(sqrt(L)); // Series resistor
ATT->R3 = -ATT->Zin*(L-2*sqrt(L)+2)/(L-2*sqrt(L));//Output impedance
// Power dissipation
ATT->PR1 = ATT->Pin*sqrt(L)*(1-2*sqrt(L)+L)/(1-sqrt(L));// Shunt resistor
ATT->PR2 = ATT->Pin*(1-sqrt(L));// Series resistor
break;
}
case R_SERIES:
{
L = pow(10, -ATT->Attenuation / 10);
// Design equations
ATT->R1 = -((ATT->Zout + ATT->Zin)*L - 2*sqrt(ATT->Zout*ATT->Zin*L))/L;// Series resistor
ATT->R2 = ATT->Zout + ATT->R1; // Input impedance
ATT->R3 = ATT->Zin + ATT->R1;//Output impedance
// Power dissipation
ATT->PR1 = ATT->Pin*(1-L);// Shunt resistor
break;
}
case R_SHUNT:
{
L = pow(10, -ATT->Attenuation / 10);
// Design equations
ATT->R1 = (2*sqrt(ATT->Zout*ATT->Zin*L)*ATT->Zout*ATT->Zin + (ATT->Zout*ATT->Zout*ATT->Zin + ATT->Zout*ATT->Zin*ATT->Zin)*L)/(4*ATT->Zout*ATT->Zin - (ATT->Zout*ATT->Zout + 2*ATT->Zout*ATT->Zin + ATT->Zin*ATT->Zin)*L);// Shunt resistor
ATT->R2 = (ATT->Zout*ATT->R1)/(ATT->Zout+ATT->R1); // Input impedance
ATT->R3 = (ATT->Zin*ATT->R1)/(ATT->Zin+ATT->R1);//Output impedance
// Power dissipation
ATT->PR1 = ATT->Pin*(1-L);// Shunt resistor
break;
}
}
return 0;
}
//This function creates the schematic. It receives the attenuator resistor values (tagATT * ATT) and bool flag to include a S-parameter box in the schematic
QString* QUCS_Att::createSchematic(tagATT *ATT, bool SP_box)
{
// create the Qucs schematic
QString *s = new QString("<Qucs Schematic ");
*s += PACKAGE_VERSION;
*s += ">\n";
*s += "<Components>\n";
switch(ATT->Topology)
{
case PI_TYPE:
*s += QString("<R R1 1 180 200 -15 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += QString("<R R2 1 255 130 -35 -45 0 0 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R2, 'f', 1));
*s += QString("<R R3 1 330 200 -15 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R3, 'f', 1));
*s += "<GND * 1 180 230 0 0 0 0>\n";
*s += "<GND * 1 330 230 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 1 140 350 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 1 360 350 -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 18 -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 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<285 130 350 130 \"\" 0 0 0 \"\">\n";
*s += "<140 130 225 130 \"\" 0 0 0 \"\">\n";
*s += "<180 130 180 170 \"\" 0 0 0 \"\">\n";
*s += "<330 130 330 170 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<50 130 50 170 \"\" 0 0 0 \"\">\n";
*s += "<50 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 350 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 160 60 12 #000000 0 \"%1 dB Pi-Type 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 360 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*s += "</Paintings>\n";
break;
case TEE_TYPE:
*s += QString("<R R1 1 180 130 -40 20 0 2 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += QString("<R R2 1 270 200 -20 60 0 3 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R2, 'f', 1));
*s += QString("<R R3 1 350 130 -40 20 0 2 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R3, 'f', 1));
*s += "<GND * 1 270 230 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 1 140 350 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 1 360 350 -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 70 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zin);
*s += "<GND * 1 70 230 0 0 0 0>\n";
// Output term
*s += QString("<Pac P1 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s +="</Components>\n";
*s += "<Wires>\n";
*s += "<140 130 150 130 \"\" 0 0 0 \"\">\n";
*s += "<210 130 320 130 \"\" 0 0 0 \"\">\n";
*s += "<270 130 270 170 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<70 130 70 170 \"\" 0 0 0 \"\">\n";
*s += "<70 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 380 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 170 60 12 #000000 0 \"%1 dB Tee-Type 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 390 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*s += "</Paintings>\n";
break;
case BRIDGE_TYPE:
*s += QString("<R R1 1 260 130 -30 -45 0 0 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += QString("<R R2 1 180 200 -90 -30 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(ATT->Zin);
*s += QString("<R R3 1 340 200 11 -30 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(ATT->Zout);
*s += QString("<R R4 1 260 260 11 -14 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R2, 'f', 1));
*s += "<GND * 1 260 290 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 1 140 350 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 1 360 350 -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 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<130 130 230 130 \"\" 0 0 0 \"\">\n";
*s += "<290 130 380 130 \"\" 0 0 0 \"\">\n";
*s += "<180 230 340 230 \"\" 0 0 0 \"\">\n";
*s += "<180 130 180 170 \"\" 0 0 0 \"\">\n";
*s += "<340 130 340 170 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<50 130 50 170 \"\" 0 0 0 \"\">\n";
*s += "<50 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 380 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 140 60 12 #000000 0 \"%1 dB Bridged-Tee-Type 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 400 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*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(QString::number(ATT->R1, 'f', 1));
*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(QString::number(ATT->R1, 'f', 1));
*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 += QString("<.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;
case QW_SERIES_TYPE:
if (ATT->useLumped)
{
double w = 2*PI*ATT->freq;
*s += QString("<L L1 1 250 0 -40 -60 0 0 \"%1H\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(num2str(ATT->Zin/w));
*s += QString("<C C1 1 180 -60 -90 -20 0 1 \"%1F\" 1 \"\" 0 \"neutral\" 0>\n").arg(num2str(1/(ATT->Zin*w)));
*s += "<GND * 1 180 -90 0 0 1 0>\n";
*s += QString("<C C1 1 320 -60 20 -20 0 1 \"%1F\" 1 \"\" 0 \"neutral\" 0>\n").arg(num2str(1/(ATT->Zin*w)));
*s += "<GND * 1 320 -90 0 0 1 0>\n";
}
else
{
*s += QString("<TLIN Line1 1 250 0 -38 -75 0 0 \"%1 Ohm\" 1 \"%2 mm\" 1 \"0 dB\" 0 \"26.85\" 0>\n").arg(ATT->Zin).arg(QString::number(ATT->L*1e3, 'f', 1));
}
*s += QString("<R R1 1 100 50 15 -26 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += QString("<R R1 1 100 150 15 -26 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(ATT->Zin);
*s += "<GND * 1 100 180 0 0 0 0>\n";
*s += QString("<R R1 1 400 150 -100 -15 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += "<GND * 1 400 180 0 0 0 0>\n";
if (SP_box)
{
// S-parameter simulation block
//-----------------------------
// The quarter-wave line is a narrowband device... so let's set the SP sweep from f0/2 to 3*f0/2
QString freq_start = QString("%1").arg(0.5*ATT->freq*1e-6);//MHz
QString freq_stop = QString("%1").arg(1.5*ATT->freq*1e-6);//MHz
*s += QString("<.SP SP1 1 100 270 0 83 0 0 \"lin\" 1 \"%1 MHz\" 1 \"%2 MHz\" 1 \"200\" 1 \"no\" 0 \"1\" 0 \"2\" 0 \"no\" 0 \"no\" 0>\n").arg(freq_start).arg(freq_stop);
// Equations
*s += "<Eqn Eqn1 1 320 270 -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 0 150 -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 0 180 0 0 0 0>\n";
// Output term
*s += QString("<Pac P1 1 500 150 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 500 180 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<100 20 100 0 \"\" 0 0 0 \"\">\n";
*s += "<50 0 220 0 \"\" 0 0 0 \"\">\n";
*s += "<100 80 100 120 \"\" 0 0 0 \"\">\n";
*s += "<400 120 400 0 \"\" 0 0 0 \"\">\n";
*s += "<280 0 450 0 \"\" 0 0 0 \"\">\n";
if (SP_box)
{
//Term 1 to input port
*s += "<0 120 0 0 \"\" 0 0 0 \"\">\n";
*s += "<0 0 50 0 \"\" 0 0 0 \"\">\n";
//Term 2 to output port
*s += "<500 120 500 0 \"\" 0 0 0 \"\">\n";
*s += "<450 0 500 0 \"\" 0 0 0 \"\">\n";
}
if (ATT->useLumped)
{//Add extra wiring to connect the shunt capacitors to the main line
*s += "<180 -30 180 0 \"\" 0 0 0 \"\">\n";
*s += "<320 -30 320 0 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
//In the case of the Pi-equivalent of the quarter wavelength line it is needed to put the title slighly higher.
if (ATT->useLumped) *s += QString("<Text 80 -140 12 #000000 0 \"%1 dB @ %2Hz Quarter-Wave series attenuator\">\n").arg(ATT->Attenuation).arg(num2str(ATT->freq));
else *s += QString("<Text 80 -120 12 #000000 0 \"%1 dB @ %2Hz Quarter-Wave series attenuator\">\n").arg(ATT->Attenuation).arg(num2str(ATT->freq));
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 50 -30 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 390 -30 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*s += "</Paintings>\n";
break;
case QW_SHUNT_TYPE:
if (ATT->useLumped)
{
double w = 2*PI*ATT->freq;
*s += QString("<L L1 1 200 60 20 -35 0 1 \"%1H\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(num2str(ATT->Zin/w));
*s += QString("<C C1 1 200 -60 -90 -20 0 1 \"%1F\" 1 \"\" 0 \"neutral\" 0>\n").arg(num2str(1/(ATT->Zin*w)));
*s += "<GND * 1 200 -90 0 0 1 0>\n";
*s += QString("<C C1 1 320 150 0 60 0 1 \"%1F\" 1 \"\" 0 \"neutral\" 0>\n").arg(num2str(1/(ATT->Zin*w)));
*s += "<GND * 1 320 180 0 0 0 0>\n";
}
else
{
*s += QString("<TLIN Line1 1 200 60 20 -35 0 1 \"%1 Ohm\" 1 \"%2 mm\" 1 \"0 dB\" 0 \"26.85\" 0>\n").arg(ATT->Zin).arg(QString::number(ATT->L*1e3, 'f', 1));
}
*s += QString("<R R1 1 160 150 -40 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += "<GND * 1 160 180 0 0 0 0>\n";
*s += QString("<R R1 1 240 150 -20 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(ATT->Zin);
*s += "<GND * 1 240 180 0 0 0 0>\n";
*s += QString("<R R1 1 300 0 -30 -60 0 0 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
if (SP_box)
{
// S-parameter simulation block
//-----------------------------
// The quarter-wave line is a narrowband device... so let's set the SP sweep from f0/2 to 3*f0/2
QString freq_start = QString("%1").arg(0.5*ATT->freq*1e-6);//MHz
QString freq_stop = QString("%1").arg(1.5*ATT->freq*1e-6);//MHz
*s += QString("<.SP SP1 1 100 270 0 83 0 0 \"lin\" 1 \"%1 MHz\" 1 \"%2 MHz\" 1 \"200\" 1 \"no\" 0 \"1\" 0 \"2\" 0 \"no\" 0 \"no\" 0>\n").arg(freq_start).arg(freq_stop);
// Equations
*s += "<Eqn Eqn1 1 320 270 -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 0 150 -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 0 180 0 0 0 0>\n";
// Output term
*s += QString("<Pac P1 1 500 150 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 500 180 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<160 120 160 105 \"\" 0 0 0 \"\">\n";//First resistor to qw line
*s += "<160 105 200 105 \"\" 0 0 0 \"\">\n";//First resistor to qw line
*s += "<240 120 240 105 \"\" 0 0 0 \"\">\n";//Second resistor to qw line
*s += "<240 105 200 105 \"\" 0 0 0 \"\">\n";//First resistor to qw line
*s += "<200 105 200 90 \"\" 0 0 0 \"\">\n";//Connect the previous wires to the line
*s += "<200 30 200 0 \"\" 0 0 0 \"\">\n";//Connect qw line to main branch
*s += "<200 0 270 0 \"\" 0 0 0 \"\">\n";//qw line to series resistor
*s += "<120 0 200 0 \"\" 0 0 0 \"\">\n";//Input port
*s += "<330 0 410 0 \"\" 0 0 0 \"\">\n";//Output port
if (SP_box)
{
//Term 1 to input port
*s += "<0 120 0 0 \"\" 0 0 0 \"\">\n";
*s += "<0 0 120 0 \"\" 0 0 0 \"\">\n";
//Term 2 to output port
*s += "<500 120 500 0 \"\" 0 0 0 \"\">\n";
*s += "<410 0 500 0 \"\" 0 0 0 \"\">\n";
}
if (ATT->useLumped)
{//Add extra wiring to connect the shunt capacitors
*s += "<320 120 320 105 \"\" 0 0 0 \"\">\n";
*s += "<320 105 180 105 \"\" 0 0 0 \"\">\n";
*s += "<200 -30 200 0 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
//Put the title a little bit higher because of the shunt cpa
if (ATT->useLumped) *s += QString("<Text 80 -140 12 #000000 0 \"%1 dB @ %2Hz Quarter-Wave shunt attenuator\">\n").arg(ATT->Attenuation).arg(num2str(ATT->freq));
else *s += QString("<Text 80 -120 12 #000000 0 \"%1 dB @ %2Hz Quarter-Wave shunt attenuator\">\n").arg(ATT->Attenuation).arg(num2str(ATT->freq));
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 50 -30 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 390 -30 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*s += "</Paintings>\n";
break;
case L_PAD_1ST_SERIES:
*s += QString("<R R1 1 255 130 -35 -45 0 0 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += QString("<R R2 1 330 200 -15 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R2, 'f', 1));
*s += "<GND * 1 330 230 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 1 140 350 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 1 360 350 -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 18 -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 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<285 130 350 130 \"\" 0 0 0 \"\">\n";
*s += "<140 130 225 130 \"\" 0 0 0 \"\">\n";
*s += "<330 130 330 170 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<50 130 50 170 \"\" 0 0 0 \"\">\n";
*s += "<50 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 350 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 160 60 12 #000000 0 \"%1 dB L-pad 1st Series 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 360 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(QString::number(ATT->R3, 'f', 1));
}
*s += "</Paintings>\n";
break;
case L_PAD_1ST_SHUNT:
*s += QString("<R R1 1 180 200 -15 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += QString("<R R2 1 255 130 -35 -45 0 0 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R2, 'f', 1));
*s += "<GND * 1 180 230 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 1 140 350 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 1 360 350 -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 18 -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 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<285 130 350 130 \"\" 0 0 0 \"\">\n";
*s += "<140 130 225 130 \"\" 0 0 0 \"\">\n";
*s += "<180 130 180 170 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<50 130 50 170 \"\" 0 0 0 \"\">\n";
*s += "<50 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 350 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 160 60 12 #000000 0 \"%1 dB L-pad 1st Shunt 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 360 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(QString::number(ATT->R3, 'f', 1));
}
*s += "</Paintings>\n";
break;
case R_SERIES:
*s += QString("<R R1 1 255 130 -35 -45 0 0 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
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 1 140 350 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 1 360 350 -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 18 -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 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<285 130 350 130 \"\" 0 0 0 \"\">\n";
*s += "<140 130 225 130 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<50 130 50 170 \"\" 0 0 0 \"\">\n";
*s += "<50 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 350 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 160 60 12 #000000 0 \"%1 dB R Series 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 360 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*s += "</Paintings>\n";
break;
case R_SHUNT:
*s += QString("<R R1 1 250 200 -15 60 0 1 \"%1 Ohm\" 1 \"26.85\" 0 \"0.0\" 0 \"0.0\" 0 \"26.85\" 0 \"US\" 0>\n").arg(QString::number(ATT->R1, 'f', 1));
*s += "<GND * 1 250 230 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 1 140 350 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 1 360 350 -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 18 -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 1 460 200 18 -26 0 1 \"1\" 1 \"%1 Ohm\" 1 \"0 dBm\" 0 \"1 GHz\" 0 \"26.85\" 0>\n").arg(ATT->Zout);
*s += "<GND * 1 460 230 0 0 0 0>\n";
}
*s += "</Components>\n";
*s += "<Wires>\n";
*s += "<140 130 350 130 \"\" 0 0 0 \"\">\n";
*s += "<250 130 250 170 \"\" 0 0 0 \"\">\n";
if (SP_box)
{ // Additional wiring because of the input/output ports
// Input port
*s += "<50 130 50 170 \"\" 0 0 0 \"\">\n";
*s += "<50 130 140 130 \"\" 0 0 0 \"\">\n";
// Output port
*s += "<460 130 460 170 \"\" 0 0 0 \"\">\n";
*s += "<460 130 350 130 \"\" 0 0 0 \"\">\n";
}
*s += "</Wires>\n";
*s += "<Diagrams>\n";
*s += "</Diagrams>\n";
*s += "<Paintings>\n";
*s += QString("<Text 160 60 12 #000000 0 \"%1 dB Shunt R 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 50 122 10 #000000 0 \"Z1: %1 Ohm\">\n").arg(ATT->Zin);
*s += QString("<Text 360 122 10 #000000 0 \"Z2: %1 Ohm\">\n").arg(ATT->Zout);
}
*s += "</Paintings>\n";
break;
}
return s;
}
//COPIED FROM QUCS-POWERCOMBINING TOOL
// Converts a double number into string adding the corresponding prefix
QString num2str(double Num)
{
char c = 0;
double cal = fabs(Num);
if(cal > 1e-20) {
cal = log10(cal) / 3.0;
if(cal < -0.2) cal -= 0.98;
int Expo = int(cal);
if(Expo >= -5) if(Expo <= 4)
switch(Expo) {
case -5: c = 'f'; break;
case -4: c = 'p'; break;
case -3: c = 'n'; break;
case -2: c = 'u'; break;
case -1: c = 'm'; break;
case 1: c = 'k'; break;
case 2: c = 'M'; break;
case 3: c = 'G'; break;
case 4: c = 'T'; break;
}
if(c) Num /= pow(10.0, double(3*Expo));
}
QString Str = QString::number(Num, 'f', 1);
if(c) Str += c;
return Str;
}
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