Octave-Wcalc: stripline_syn
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,

| Octave-Wcalc: stripline_syn stripline_syn - Symmetric stripline transmission line synthesis ## SYNOPSIS [w_out, h_out, l_out, er_out] = stripline_syn(z0, w, h, l, tmet, rho, rough, er, tand, f, flag) ## PARAMETERS ### INPUT PARAMETERS z0 : desired characteristic impedance (Ohms) w : width of stripline line (meters) h : substrate thickness (meters) l : lentgh of stripline line (meters) tmet : metal thickness (meters) rho : resistivity of the metalization (relative to copper) rough : conductor surface roughness (meters-rms) er : substrate relative permitivitty tand : substrate loss tangent f : synthesis frequency (Hz) flag : indicates which parameters should be optimized flag=1 : synthesize the metal width flag=1 : synthesize the substrate thickness flag=2 : synthesize the substrate dielectric constant flag=3 : synthesize the metal length ### OUTPUT VALUES w_out : Calculated width of stripline line (meters) h_out : Calculated height of stripline line (meters) l_out : Calculated length of stripline line (meters) er_out : Calculated substrate relative permitivitty of stripline line ## DESCRIPTION Function to synthesize the physical dimenstions of a single stripline transmission line to achieve a desired characteristic impedance and electrical length. The desired characteristic impedance and some of the physical dimensions of the stripline line are given as inputs and the remaining dimensions are calculated. ``
        XXXXXXXXXXXXXXXXX ground XXXXXXXXXXXXXXXXXXXXX
        ----------------------------------------------
       (  dielectric,er         \/           /|\     (
        )             -------   --            |       )
       (             | metal | Tmet           | H    (
        )             -------   --            |       )
       (             <---W--->  /\           \|/     (
        ----------------------------------------------
        XXXXXXXXXXXXXXXXX ground XXXXXXXXXXXXXXXXXXXXX
## EXAMPLE
     % mils to meters conversion factor
    sf=25.4e-6;
     % desired impedance
    z0=75;
     % desired electrical length (degrees)
    elen=90;
     % width (we'll synthesize this)
    w=0;
     % height
    h=62*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;
     % synthesize width
    flag=0;
    [w_out,h_out,l_out,er_out] = ...
      stripline_syn(z0,elen,w,h,l,tmet,rho,rough,er,tand,f,flag);
    disp(sprintf('w=%g mils, l=%g mils',w_out/sf,l_out/sf));
    disp(sprintf('er=%g',er_out));
    disp(sprintf('z0=%g ohms, length=%g degrees',z0,elen));
## 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 Octave-Wcalc page.
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Air Core Solenoid Inductor Coaxial Transmission Line Coupled Microstrip Integrated Circuit Microstrip Microstrip Stripline
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