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119 lines
4.5 KiB
C++
119 lines
4.5 KiB
C++
/*
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* Copyright (C) 2001 Gopal Narayanan <gopal@astro.umass.edu>
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* Copyright (C) 2002 Claudio Girardi <claudio.girardi@ieee.org>
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* Copyright (C) 2005, 2006 Stefan Jahn <stefan@lkcc.org>
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* Modified for Kicad: 2018 Jean-Pierre Charras <jp.charras at wanadoo.fr>
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* Copyright The KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this package; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef TRANSLINE_CALCULATIONS_MICROSTRIP_H
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#define TRANSLINE_CALCULATIONS_MICROSTRIP_H
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#include <transline_calculations/transline_calculation_base.h>
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class MICROSTRIP : public TRANSLINE_CALCULATION_BASE
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{
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using TCP = TRANSLINE_PARAMETERS;
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public:
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MICROSTRIP() :
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TRANSLINE_CALCULATION_BASE( { TCP::EPSILONR, TCP::H_T, TCP::H, TCP::PHYS_WIDTH, TCP::T, TCP::Z0,
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TCP::FREQUENCY, TCP::EPSILON_EFF, TCP::SKIN_DEPTH, TCP::SIGMA, TCP::ROUGH,
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TCP::TAND, TCP::PHYS_LEN, TCP::MUR, TCP::MURC, TCP::ANG_L,
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TCP::UNIT_PROP_DELAY, TCP::ATTEN_COND, TCP::ATTEN_DILECTRIC } )
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{
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}
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friend class COUPLED_MICROSTRIP;
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/// Analyse track geometry parameters to output Z0 and Ang_L
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void Analyse() override;
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/// Synthesis track geometry parameters to match given Z0
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bool Synthesize( SYNTHESIZE_OPTS aOpts ) override;
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private:
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/// Sets the output values and status following analysis
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void SetAnalysisResults() override;
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/// Sets the output values and status following synthesis
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void SetSynthesisResults() override;
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/// Calculates the width with the current set of parameters
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double SynthesizeWidth() const;
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/// Calculates the dispersion correction factor for the characteristic impedance static
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static double Z0_dispersion( double, double, double, double, double );
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/// Calculates the impedance for a stripline in a homogeneous medium, without cover effects
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static double Z0_homogeneous( double );
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/// Calculates the cover effect on impedance for a stripline in a homogeneous medium
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static double delta_Z0_cover( double, double );
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/// Calculates the filling factor for a microstrip without cover and zero conductor thickness
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static double filling_factor( double, double );
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/// Calculates the cover effect on filling factor
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static double delta_q_cover( double );
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/// Calculates the thickness effect on filling factor
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static double delta_q_thickness( double, double );
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/// Calculates effective dielectric constant from material e_r and filling factor
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static double e_r_effective( double, double );
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/// Calculates the thickness effect on normalized width
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static double delta_u_thickness( double, double, double );
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/// Calculates the dispersion correction factor for the effective permeability
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static double e_r_dispersion( double, double, double );
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/// Calculate the microstrip conductor losses per unit
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double conductor_losses() const;
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/// Calculates the microstrip dielectric losses per unit
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double dielectric_losses() const;
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/// Calculates the microstrip static impedance
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void microstrip_Z0();
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/// Calculates frequency dependent parameters of the microstrip
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void dispersion();
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/// Calculates the attenuation of the microstrip
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void attenuation();
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/// Calculates the effective magnetic permeability
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void mur_eff_ms();
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/// Calculates microstrip length in radians
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void line_angle();
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double Z0_0{ 0.0 }; ///< static characteristic impedance
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double er_eff_0{ 0.0 }; ///< Static effective dielectric constant
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double mur_eff{ 0.0 }; ///< Effective mag. permeability
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double w_eff{ 0.0 }; ///< Effective width of line
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double Z0_h_1{ 0.0 }; ///< homogeneous stripline impedance
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};
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#endif //TRANSLINE_CALCULATIONS_MICROSTRIP_H
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