/*
 * c_microstrip.h - coupled microstrip class definition
 *
 * Copyright (C) 2002 Claudio Girardi <in3otd@qsl.net>
 * Copyright (C) 2005 Stefan Jahn <stefan@lkcc.org>
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this package; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
 * Boston, MA 02110-1301, USA.  
 *
 */

#ifndef _C_MICROSTRIP_H_
#define _C_MICROSTRIP_H_

class c_microstrip : public transline {
 public:
  c_microstrip();
  ~c_microstrip();

 private:
  double er;			/* dielectric constant */
  double mur;			/* mag. permeability */
  double h;			/* height of substrate */
  double ht;			/* height to the top of box */
  double t;			/* thickness of top metal */
  double sigma;			/* Conductivity of the metal */
  double tand;			/* Dielectric Loss Tangent */
  double rough;			/* Roughness of top metal */
  double f;			/* Frequency of operation */
  double w;			/* width of lines */
  double w_t_e;                 /* even-mode thickness-corrected line width */
  double w_t_o;                 /* odd-mode thickness-corrected line width */
  double l;			/* length of lines */
  double s;			/* spacing of lines */
  double Z0_e_0;		/* static even-mode impedance */
  double Z0_o_0;		/* static odd-mode impedance */
  double Z0e;			/* even-mode impedance */
  double Z0o;			/* odd-mode impedance */
  double c_e;			/* even-mode capacitance */
  double c_o;			/* odd-mode capacitance */
  double ang_l_e;		/* even-mode electrical length in angle */
  double ang_l_o;		/* odd-mode electrical length in angle */
  double er_eff_e;		/* even-mode effective dielectric constant */
  double er_eff_o;		/* odd-mode effective dielectric constant */
  double er_eff_e_0;		/* static even-mode effective dielectric constant */
  double er_eff_o_0;		/* static odd-mode effective dielectric constant */
  double er_eff;		/* FIXME: dummy */
  double mur_eff;		/* Effective mag. permeability */
  double w_eff;			/* Effective width of line */
  double atten_dielectric_e;	/* even-mode dielectric losses (dB) */
  double atten_cond_e;		/* even-mode conductors losses (dB) */
  double atten_dielectric_o;	/* odd-mode dielectric losses (dB) */
  double atten_cond_o;		/* odd-mode conductors losses (dB) */
  double skindepth;		/* Skin depth in mils */

 public:
  void analyze ();
  void synthesize ();

 private:
  double skin_depth();
  double delta_u_thickness_single(double, double);
  void delta_u_thickness();
  void compute_single_line();
  double filling_factor_even(double, double, double);
  double filling_factor_odd(double, double, double);
  double delta_q_cover_even(double);
  double delta_q_cover_odd(double);
  void er_eff_static();
  double delta_Z0_even_cover(double, double, double);
  double delta_Z0_odd_cover(double, double, double);
  void Z0_even_odd();
  double calc_mur_eff();
  void er_eff_freq();
  void conductor_losses();
  void dielectric_losses();
  void attenuation();
  void line_angle();
  void syn_err_fun(double *, double *, double, double, double, double, double);
  void synth_width();
  void Z0_dispersion();
  void calc();
  void get_c_microstrip_sub();
  void get_c_microstrip_comp();
  void get_c_microstrip_elec();
  void get_c_microstrip_phys();
  void show_results();
  void syn_fun(double *, double *, double, double, double, double);


 private:
  microstrip * aux_ms;
};

#endif /* _C_MICROSTRIP_H_ */