mirror of
https://github.com/ra3xdh/qucs_s
synced 2025-03-28 21:13:26 +00:00
4eb2dad70d
In this commit an MS open circuit is added to the QW BSF as it was missing. It models the fringing effects of the stub.
91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
/***************************************************************************
|
|
copyright: (C) 2010 by Michael Margraf
|
|
***************************************************************************/
|
|
|
|
/***************************************************************************
|
|
* *
|
|
* 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. *
|
|
* *
|
|
***************************************************************************/
|
|
|
|
#ifndef FILTER_H
|
|
#define FILTER_H
|
|
|
|
#define CLASS_LOWPASS 0
|
|
#define CLASS_HIGHPASS 1
|
|
#define CLASS_BANDPASS 2
|
|
#define CLASS_BANDSTOP 3
|
|
|
|
#define TYPE_BESSEL 0
|
|
#define TYPE_BUTTERWORTH 1
|
|
#define TYPE_CHEBYSHEV 2
|
|
#define TYPE_CAUER 3
|
|
|
|
#include <cmath>
|
|
|
|
static const double pi = 3.1415926535897932384626433832795029; /* pi */
|
|
static const double one_over_pi = 0.3183098861837906715377675267450287; /* 1/pi */
|
|
static const double ln2 = 0.6931471805599453094172321214581766; /* log_e(2) */
|
|
|
|
static const double LIGHTSPEED = 299792458.0;
|
|
static const double Z_FIELD = 376.73031346958504364963;
|
|
|
|
/*! coth function */
|
|
static inline double coth(const double x) {
|
|
return (1.0 + 2.0 / (exp(2.0*(x)) - 1.0));
|
|
}
|
|
|
|
/*! sech function */
|
|
static inline double sech(const double x) {
|
|
return (2.0 / (exp(x) + exp(-(x))));
|
|
}
|
|
|
|
struct tFilter {
|
|
int Type;
|
|
int Class;
|
|
int Order;
|
|
double Ripple; // in dB
|
|
double Impedance;
|
|
double Frequency;
|
|
double Frequency2;
|
|
double Frequency3;
|
|
double Attenuation;
|
|
};
|
|
|
|
|
|
class QString;
|
|
|
|
class Filter {
|
|
public:
|
|
Filter();
|
|
|
|
static double getNormValue(int, tFilter*);
|
|
static double getQuadraticNormValues(int, tFilter*, double&);
|
|
|
|
// Component wrappers
|
|
static QString getLineString(bool isMicrostrip, double width_or_impedance, double l, int x, int y, int rotate=0);
|
|
static QString getTeeString(int x, int y, double width1, double width2, double width3);
|
|
static QString getWireString(int x1, int x2, int x3, int x4);
|
|
static QString getMS_Via(double height, int x, int y, int rotate);
|
|
static QString getMS_Open(double width, int x, int y, int rotate);
|
|
|
|
|
|
protected:
|
|
static QString num2str(double);
|
|
static double getE6value(double);
|
|
|
|
private:
|
|
static double BesselValue(int, int);
|
|
static double ButterworthValue(int, int);
|
|
static double ChebyshevValue(int, int, double);
|
|
|
|
static double quadraticBesselValues(int, int, double&);
|
|
static double quadraticButterworthValues(int, int, double&);
|
|
static double quadraticChebyshevValues(int, int, double, double&);
|
|
};
|
|
|
|
#endif
|