Function to analyze the electrical characteristics of a coaxial transmission line. The physical dimensions of the line are given as inputs and the characteristic impedance and incremental circuit model elements are calculated.
// mils to meters conversion factor sf=25.4e-6; // 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; // length of line len=1.0; // 100 MHz operation f=100e6; [z0,elen,loss,L,R,C,G,lc,ld,fc,em] = coax_calc(a,b,c,t,rho_a,rho_b,er,tand,len,f); disp(sprintf('z0 = %g Ohms',z0)); disp(sprintf('elen = %g degrees',elen)); disp(sprintf('loss = %g dB',loss)); disp(sprintf('L = %g H/m',L)); disp(sprintf('R = %g Ohms/m',R)); disp(sprintf('C = %g F/m',C)); disp(sprintf('G = %g S/m',G)); disp(sprintf('Conductor loss = %g dB/m', lc)); disp(sprintf('Dielectric loss = %g dB/m', ld)); disp(sprintf('TE10 cutoff = %g GHz', fc/1e9)); disp(sprintf('Max E field = %g kV/m', em/1e3));
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
Dan McMahill
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