Sci-Wcalc: ic_microstrip_calc
Description: Wcalc: A transmission line calculator
Keywords: coupled microstrip, coupled microstrip analysis, coupled microstrip synthesis, microstrip, microstrip analysis, microstrip synthesis, stripline, stripline analysis, stripline synthesis,

| Sci-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) ## PARAMETERS ### INPUT 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 ALSO air_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 Return to the Sci-Wcalc page.
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