/*
 * microstrip.h - microstrip class definition
 *
 * Copyright (C) 2001 Gopal Narayanan <gopal@astro.umass.edu>
 * 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 __MICROSTRIP_H
#define __MICROSTRIP_H

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

  friend class c_microstrip;

 private:
  double er;			/* dielectric constant */
  double h;			/* height of substrate */
  double ht;			/* height to the top of box */
  double t;			/* thickness of top metal */
  double tand;			/* Dielectric Loss Tangent */
  double rough;			/* Roughness of top metal */
  double w;			/* width of line */
  double l;			/* length of line */
  double Z0_0;			/* static characteristic impedance */
  double Z0;			/* characteristic impedance */
  double ang_l;			/* Electrical length in angle */
  double er_eff_0;		/* Static effective dielectric constant */
  double er_eff;		/* Effective dielectric constant */
  double mur_eff;		/* Effective mag. permeability */
  double w_eff;			/* Effective width of line */
  double atten_dielectric;	/* Loss in dielectric (dB) */
  double atten_cond;		/* Loss in conductors (dB) */

  /* private params */
  double Z0_h_1;		/* homogeneous stripline impedance */

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

 private:
  double er_eff_freq();
  double alpha_c();
  double alpha_c_roughness();
  double alpha_dielectric();
  double char_impedance_ht();
  double synth_width();
  double ereff_dispersion();
  double Z0_dispersion();
  double Z0_homogeneous(double);
  double delta_Z0_cover(double, double);
  double filling_factor(double, double);
  double delta_q_cover(double);
  double delta_q_thickness(double, double);
  double e_r_effective(double, double);
  double delta_u_thickness(double, double, double);
  double e_r_dispersion(double, double, double);
  double Z0_dispersion(double, double, double, double, double);
  double conductor_losses();
  double dielectric_losses();
  void microstrip_Z0();
  void dispersion();
  void attenuation();
  void mur_eff_ms();
  void line_angle();
  void calc();
  void get_microstrip_sub();
  void get_microstrip_comp();
  void get_microstrip_elec();
  void get_microstrip_phys();
  void show_results();
};

#endif /* __MICROSTRIP_H */
