Function to synthesize the physical dimenstions of a single
ic_microstrip transmission line to achieve a desired characteristic
impedance and electrical length. The desired characteristic
impedance and some of the physical
dimensions of the ic_microstrip line are given as inputs and the
remaining dimensions are calculated.
The model accounts for dispersion (frequency dependent propagation
velocity).
|<--W-->|
_______
| metal | <- tmet,rho,rough
----------------------------------------------
{************** Oxide (tox,eox) **************
----------------------------------------------
( substrate /|\ (
) es,sigmas H | )
( \|/ (
----------------------------------------------
XXXXXXXXXXXXXXXXXX ground XXXXXXXXXXXXXXXXXXXX
// desired impedance
z0=75;
// desired electrical length (degrees)
elen=90;
// micron to meters conversion factor
sf=1.0e-6;
// width
w=160e-6;
// length
l=1000e-6;
// oxide thickness
tox=1.0e-6;
// oxide relative dielectric constant
eox=4.0;
// substrate thickness
h=250e-6;
// substrate relative dielectric constant
es=11.8;
// substrate conductivity (1/(ohm-m))
sigmas=10;
// metal thickness
tmet=1.6e-6;
// metal resitivity (ohm-m)
rho=3e-8;
// metal surface roughness
rough=0;
// frequency
f=2.4e9;
// synthesize width
flag=0;
[w_out,h_out,tox_out,l_out] = ...
ic_microstrip_syn(z0,elen,w,l,tox,eox,h,es,sigmas,tmet,rho,rough,f,flag);
disp(sprintf('w = %8.3g um', w_out*1e6));
disp(sprintf('h = %8.3g um', h_out*1e6));
disp(sprintf('tox = %8.3g um', tox_out*1e6));
disp(sprintf('l = %8.3g um', l_out*1e6));
air_coil_calc
air_coil_syn
coax_calc
coax_syn
coplanar_calc
coplanar_syn
coupled_microstrip_calc
coupled_microstrip_syn
coupled_stripline_calc
coupled_stripline_syn
ic_microstrip_calc
ic_microstrip_syn
microstrip_calc
microstrip_syn
stripline_calc
stripline_syn
Dan McMahill
None known
Please report any bugs on the Wcalc Sourceforge Project Page