Qucs-core: rectline Class Reference

Qucs-core 0.0.19

#include <rectline.h>

Inheritance diagram for rectline:

Inheritance graph

Collaboration diagram for rectline:

Collaboration graph

Public Member Functions
	CREATOR (rectline)
void	initSP (void)
void	calcSP (nr_double_t)
void	calcNoiseSP (nr_double_t)
void	initDC (void)
void	initAC (void)
void	calcAC (nr_double_t)
void	calcNoiseAC (nr_double_t)
void	saveCharacteristics (nr_complex_t)
Data Fields
	RECTLINE
	PROP_COMPONENT
	PROP_NO_SUBSTRATE
	PROP_LINEAR
Private Member Functions
void	calcPropagation (nr_double_t)
void	initCheck (void)
void	calcResistivity (const char *const, nr_double_t)
Private Attributes
nr_double_t	alpha
nr_double_t	beta
nr_complex_t	zl
nr_double_t	fc_low
nr_double_t	fc_high
nr_double_t	rho

Detailed Description

A TE10 rectangular waveguide component

Note:: Evanecent mode are not implemented

Todo:: Implement evanecent mode

Definition at line 318 of file rectline.cpp.

Member Function Documentation

void rectline::calcAC ( nr_double_t frequency ) [virtual]

calc propagation using classical transmission line formulae

Reimplemented from qucs::circuit.

Definition at line 280 of file rectline.cpp.

void rectline::calcNoiseAC ( nr_double_t ) [virtual]

Compute noise

Reimplemented from qucs::circuit.

Definition at line 295 of file rectline.cpp.

void rectline::calcNoiseSP ( nr_double_t ) [virtual]

Compute noise parameter

Reimplemented from qucs::circuit.

Definition at line 202 of file rectline.cpp.

void rectline::calcPropagation ( nr_double_t frequency ) [private]

Compute propagation constant

According to [1] table 3.2 p 128 Wawe number in vacuum is:

$k=\omega\sqrt{\mu\varepsilon}=\omega\sqrt{\mu_r \varepsilon_r \mu_0 \varepsilon_0}$

Where $\omega=2\pi f$ , $f$ is the frequency, $$ the magnetic permeability, $\varepsilon_r$ the permitivity. Using well known formula $c^2\mu_0\varepsilon_0=1$ , we found:

$k=\frac{\omega}{c} std::sqrt{\mu_r \varepsilon_r}$

In general case $k_c$ is:

$k_c = \sqrt{\left(\frac{m\pi}{a}\right)^2+\left(\frac{n\pi}{b}\right)^2}$

Where $a$ is the wider dimension of the guide and $b$ the smaller and $(n,m)\in\mathbb{N}^2$ . In the TE10 case it simplifies to:

$k_c = \sqrt{\left(\frac{\pi}{a}\right)^2} = \frac{\pi}{a}$

The propagation constant is:

$\beta = \sqrt{k^2 - k_c^2}$

Loss could be divised in dielectric and resistive loss. Dielectric loss are computed using:

$\alpha_d = \frac{k^2 \tan \delta}{2\beta}$

Resistive using [1] eq (3.96) p 125 (valid only for TE10 mode)

$\alpha_c=\frac{R_s}{a^3 b \beta k Z_0} \left( 2 b \pi^2 + a^3 k^2 \right)$

Wave impedance is for TE10:

$Z = \frac{k Z_0}{\beta}$

Definition at line 153 of file rectline.cpp.

void rectline::calcResistivity	(	const char * const	Mat,
		nr_double_t	T
	)		`[private]`

Definition at line 63 of file rectline.cpp.

void rectline::calcSP ( nr_double_t frequency ) [virtual]

Compute S parameter use generic transmission line formulae

Reimplemented from qucs::circuit.

Definition at line 246 of file rectline.cpp.

rectline::CREATOR ( rectline )

void rectline::initAC ( void ) [virtual]

init AC

Reimplemented from qucs::circuit.

Definition at line 273 of file rectline.cpp.

void rectline::initCheck ( void ) [private]

Check validity of parameter and compute cutoff frequencies

Note:: do not check validity of epsr or mur because some research stuff could use epsr < 1 (plasma)

Definition at line 215 of file rectline.cpp.

void rectline::initDC ( void ) [virtual]

Reimplemented from qucs::circuit.

Definition at line 266 of file rectline.cpp.

void rectline::initSP ( void ) [virtual]

initialize S-parameters

Reimplemented from qucs::circuit.

Definition at line 239 of file rectline.cpp.

void rectline::saveCharacteristics ( nr_complex_t ) [virtual]

Reimplemented from qucs::circuit.

Definition at line 234 of file rectline.cpp.

Field Documentation

nr_double_t rectline::alpha [private]

attenuation constant

Definition at line 49 of file rectline.h.

nr_double_t rectline::beta [private]

propagation constant

Definition at line 51 of file rectline.h.

nr_double_t rectline::fc_high [private]

cut off frequency higher mode

Definition at line 57 of file rectline.h.

nr_double_t rectline::fc_low [private]

cut off frequency lower bound

Definition at line 55 of file rectline.h.

rectline::PROP_COMPONENT

Definition at line 319 of file rectline.cpp.

rectline::PROP_LINEAR

Definition at line 319 of file rectline.cpp.

rectline::PROP_NO_SUBSTRATE

Definition at line 319 of file rectline.cpp.

rectline::RECTLINE

Definition at line 319 of file rectline.cpp.

nr_double_t rectline::rho [private]

resistivity

Definition at line 59 of file rectline.h.

nr_complex_t rectline::zl [private]

wave impedance

Definition at line 53 of file rectline.h.

The documentation for this class was generated from the following files: