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Octave-Wcalc: ic_microstrip_calc
ic_microstrip_calc - Integrated circuit microstrip transmission line analysis
SYNOPSIS
[z0, keff, elen, loss, L, R, C, G] =
ic_microstrip_calc(w, l, tox, h, er, sigmas, tmet, rho, rough, f)
PARAMETERSINPUT PARAMETERS
- w
: width of ic_microstrip line (meters)
- l
: lentgh of ic_microstrip line (meters)
- tox
: oxide thickness (meters)
- h
: substrate thickness (meters)
- er
: substrate relative permitivity
- sigmas
: substrate conductivity (1/ohm-m)
- tmet
: metal thickness (meters)
- rho
: resistivity of wire (relative to copper)
- rough
: conductor surface roughness (meters-rms)
- f
: synthesis frequency (Hz)
OUTPUT VALUES
- z0
: calculated characteristic impedance (Ohms)
- keff
: calculated effective relative permitivitty
- elen
: calculated electrical length of the line (degrees)
- loss
: calculated loss of the line (dB)
- L
: calculated inductance per length (Henries/meter)
- R
: calculated resistance per length (Ohms/meter)
- C
: calculated capacitance per length (Farads/meter)
- G
: calculated conductance per length (Siemens/meter)
DESCRIPTION
Function to analyze the electrical characteristics of a single
integrated circuit microstrip transmission line. The physical
dimensions of the microstrip line are given as inputs and the
characteristic impedance, effective dielectric constant, loss and
open circuit end correction are calculated.
|<--W-->|
_______
| metal | <- tmet,rho,rough
----------------------------------------------
{************** Oxide (tox,eox) **************
----------------------------------------------
( substrate /|\ (
) es,sigmas H | )
( \|/ (
----------------------------------------------
XXXXXXXXXXXXXXXXXX ground XXXXXXXXXXXXXXXXXXXX
EXAMPLE % width
w=150e-6;
% substrate height
h=250e-6;
% length
l=1000e-6;
% substrate permitivitty
es=11.8;
% substrate conductivity
sigmas=0.5;
% oxide thickness
tox=1.5e-6;
% oxide permitivitty
eox=4;
% metal thickenss
tmet=0.8e-6;
% metal resitivity
rho=3.0e-8;
% metal surface roughness
rough=0.0;
% frequency
f=2.4e9;
[z0,keff,elen,loss,L,R,C,G] = ...
ic_microstrip_calc(w,l,tox,eox,h,es,sigmas,tmet,rho,rough,f);
disp(sprintf('z0 = %8.4g + j %8.4g Ohms', real(z0), imag(z0) ));
disp(sprintf('keff = %8.4g ',keff));
disp(sprintf('elen = %8.4g degrees',elen));
disp(sprintf('loss = %8.4g dB',loss));
disp(sprintf('L = %8.4g nH/mm', L*1e6));
disp(sprintf('R = %8.4g Ohm/mm', R*1e-3));
disp(sprintf('C = %8.4g fF/mm', C*1e12));
disp(sprintf('G = %8.4g uMho/mm', G*1e3));
SEE ALSOair_coil_calc
air_coil_syn
coax_calc
coax_syn
coupled_microstrip_calc
coupled_microstrip_syn
ic_microstrip_calc
ic_microstrip_syn
microstrip_calc
microstrip_syn
stripline_calc
stripline_syn
AUTHOR
Dan McMahill
BUGS
None known
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