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https://github.com/ra3xdh/qucs_s
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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
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
//-*- C++ -*-
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/****************************************************************************
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** Qucs Attenuator Synthesis
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** attenuatorfunc.h
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**
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** since 2006/6/14
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**
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**
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**
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**
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**
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*****************************************************************************/
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#ifndef QUCS_ATT_H
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#define QUCS_ATT_H
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#define PI_TYPE 0
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#define TEE_TYPE 1
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#define BRIDGE_TYPE 2
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#define REFLECTION_TYPE 3
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#define QW_SERIES_TYPE 4
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#define QW_SHUNT_TYPE 5
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#define L_PAD_1ST_SERIES 6
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#define L_PAD_1ST_SHUNT 7
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#define R_SERIES 8
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#define R_SHUNT 9
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#define C0 299792458
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#define PI 3.141592653589793238462643383279502884197169399375105820974944592307816406286
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#include <cmath>
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struct tagATT
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{
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int Topology;
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double Zin;
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double Zout;
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double Attenuation;
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double MinimumATT;
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double R1;
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double R2;
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double R3;
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double R4;
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double L; // Length of the quarter-wavelength inverter. QW series/shunt attenuator only
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double PR1;//Power dissipated by R1 [W]
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double PR2;//Power dissipated by R2 [W]
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double PR3;//Power dissipated by R3 [W]
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double PR4;//Power dissipated by R4 [W]
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double Pin;//Input power [W]
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bool minR; //The reflection attenuator can be designed using two different resistor values. The first one is such
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//as R < Z0 whereas the other is such as R > Z0. This field is just a flag to indicate what solution
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//qucsattenuator should use.
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double freq;//Central frequency for quarter-wavelength attenuators
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bool useLumped;//Used only in the quarter wave attenuators. It indicates that the program must replace the
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//qw line by its lumped element equivalent (CLC)
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};
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class QString;
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class QUCS_Att
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{
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public:
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QUCS_Att();
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~QUCS_Att();
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int Calc(tagATT*);
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static QString* createSchematic(tagATT*, bool);
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};
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QString num2str(double);
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#endif
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