SYNOPSIS[z0, keff, elen, loss, L, R, C, G, lc, ld, deltal, depth] = coplanar_calc(w, s, h, l, tmet, rho, rough, er, tand, with_ground, f)PARAMETERSINPUT PARAMETERS
OUTPUT VALUES
DESCRIPTIONFunction to analyze the electrical characteristics of a single coplanar transmission line. The physical dimensions of the coplanar 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). |<--S-->|<--W-->|<--S-->| ______ _______ ______ ) | | metal | | ( <- rho,rough ---------------------------------------------- ( dielectric /|\ ( ) er,tand H | ) ( \|/ ( ---------------------------------------------- XXXXXXXXXXXXXXXXXX ground XXXXXXXXXXXXXXXXXXXX EXAMPLE% mils to meters conversion factor sf=25.4e-6; % width w=20*sf; % space s=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] = ... coplanar_calc(w,s,h,l,tmet,rho,rough,er,tand,0,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_calc AUTHORDan McMahill BUGSNone known, but this module is only moderately tested Please report any bugs on the Wcalc Sourceforge Project Page Return to the MEX-Wcalc page. |
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Copyright © 2001, 2002, 2004, 2005, 2006 Dan McMahill ALL RIGHTS RESERVED. |