Sci-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
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

AUTHOR

Dan McMahill

BUGS

None known

Please report any bugs on the Wcalc Sourceforge Project Page

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Copyright © 2001, 2002, 2004, 2005, 2006 Dan McMahill ALL RIGHTS RESERVED.