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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)
PARAMETERSINPUT 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 ALSOair_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
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