Sci-Wcalc: coax_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,

| 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) ## PARAMETERS ### INPUT 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 dielectric tand : loss tangent of dielectric len : physical length of line (meters) f : operating frequency (Hertz) flag : indicates which parameters should be optimized flag=0 : synthesize a flag=1 : synthesize b flag=2 : synthesize c flag=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 dielectric len : 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 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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Air Core Solenoid Inductor Coaxial Transmission Line Coupled Microstrip Integrated Circuit Microstrip Microstrip Stripline
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