|  | Sci-Wcalc: coax_syn 
 coax_syn - Coaxial transmission line synthesis
 SYNOPSIS[a_out, b_out, c_out, er_out, len] = 
coax_syn(a, b, c, t, rho_a, rho_b, er, tand, len, f, flag)PARAMETERSINPUT PARAMETERS
a
: radius of inner conductor (meters)b
: inner radius of outer conductor (meters)c
: offset of the inner conductor from the center (meters)t
: thickness of shield (meters)rho_a
: resistivity of inner conductor (ohms/meter)rho_b
: resistivity of outer conductor (ohms/meter)er
: relative permitivitty of dielectrictand
: loss tangent of dielectriclen
: physical length of line (meters)f
: operating frequency (Hertz)flag
: indicates which parameters should be optimized
    
flag=0 : synthesize aflag=1 : synthesize bflag=2 : synthesize cflag=3 : synthesize er OUTPUT VALUES
a_out
: synthesized radius of inner conductor (meters)b_out
: synthesized inner radius of outer conductor (meters)c_out
: synthesized offset of the inner conductor from the center (meters)er_out
: synthesized relative permitivitty of dielectriclen
: synthesized physical length of line (meters) DESCRIPTION
Function to synthesize the physical parameters of a
coaxial transmission line to achieve a given set of
electrical characteristics.
 EXAMPLE // mils to meters conversion factor
sf=25.4e-6;
 // desired characteristic impedance
z0=75.0;
 // desired electrical length (degrees)
elen=90.0;
 // radius of inner conductor
a=10.0*sf;
 // inner radius of outer conductor
b=100.0*sf;
 // offset of inner conductor
c=0*sf;
 // thickness of outer conductor
t=5.0*sf;
 // resistivity of inner conductor
rho_a=3.5e-8;
 // resistivity of outer conductor
rho_b=rho_a;
 // relative permitivitty of dielectric
er=9.5;
 // dielectric loss tangent
tand=0.01;
 // 100 MHz operation
f=100e6;
 // synthesize b
flag=1;
[a,b,c,er,len] = ...
   coax_syn(z0,elen,a,b,c,t,rho_a,rho_b,er,tand,f,flag);
disp(sprintf('z0   = %g Ohms',z0));
disp(sprintf('elen = %g degrees',elen));
disp(sprintf('a    = %g m',a));
disp(sprintf('b    = %g m',b));
disp(sprintf('c    = %g m',c));
disp(sprintf('er   = %g ',er));
disp(sprintf('len  = %g m',len));
SEE ALSOair_coil_calcair_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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