|  | Sci-Wcalc: microstrip_calc 
 microstrip_calc - Symmetric microstrip transmission line analysis
 SYNOPSIS[z0, keff, elen, loss, L, R, C, G, lc, ld, deltal, depth] = 
microstrip_calc(w, h, l, tmet, rho, rough, er, tand, f)PARAMETERSINPUT PARAMETERS
w
: width of microstrip line (meters)h
: substrate thickness (meters)l
: lentgh of microstrip line (meters)tmet
: metal thickness (meters)rho
: resistivity of the line (relative to copper)rough
: conductor surface roughness (meters-rms)er
: substrate relative permitivittytand
: substrate loss tangentf
: analysis frequency (Hz) OUTPUT VALUES
z0
: calculated characteristic impedance (Ohms)keff
: calculated effective relative permitivityelen
: 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)lc
: conductor loss (dB/meter)ld
: dielectric loss (dB/meter)deltal
: calculated open circuit end correction (meters)depth
: calculated skin depth (meters) DESCRIPTION
Function to analyze the electrical characteristics of a single 
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.
The model accounts for dispersion (frequency dependent propagation
velocity).
                 |<--W-->|
                  _______    
                 | metal | <- rho,rough
    ----------------------------------------------
   (  dielectric                         /|\     (
    )   er,tand                       H   |       )
   (                                     \|/     (
    ----------------------------------------------
    XXXXXXXXXXXXXXXXXX ground XXXXXXXXXXXXXXXXXXXX
 EXAMPLE // mils to meters conversion factor
sf=25.4e-6;
 // width
w=20*sf;
 // height
h=15*sf;
 // length
l=1100*sf;
 // metal thickness
tmet=1.4*sf;
 // resitivity
rho=1.72e-8;
 // metal surface roughness
rough=0.05*sf;
 // relative dielectric constant
er=4.5;
 // loss tangent
tand=0.01;
 // frequency
f=2.4e9;
[z0,keff,elen,loss,L,R,C,G,lc,ld,deltal,depth] = ...
  microstrip_calc(w,h,l,tmet,rho,rough,er,tand,f);
disp(sprintf('z0   = %8.4g Ohms', 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 H/m', L));
disp(sprintf('R    = %8.4g Ohms/m', R));
disp(sprintf('C    = %8.4g F/m', C));
disp(sprintf('G    = %8.4g S/m', G));
disp(sprintf('lc   = %8.4g dB/m', lc));
disp(sprintf('ld   = %8.4g dB/m', ld));
disp(sprintf('open end correction = %8.4g mil', deltal/sf));
disp(sprintf('skin depth = %8.4g um', depth*1e6));
SEE ALSOair_coil_calcair_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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