ABCD Matrix for a Multi branched Power Line

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CorneCap 2018-3-7

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https://ww2.mathworks.cn/matlabcentral/answers/386877-abcd-matrix-for-a-multi-branched-power-line

hello everyone, i have to calculate the transfer function for a multi branched powerline (from source to destination). let's say N equidistant branches with loads at ends (with the same impedance zl). D is the cable length. every 2 branches are separated with D/N (meter). the load is L=1m far from the connection node. I wanted to know if what I did is correct because i have a doubt:

 T0=Series(zs);  //the source ABCD matrix [1 zs;0 1] 
 d=D/N;
 T1=TLL(f,d);   //the ABCD matrix for a transmission line of length d : 
[cosh(sigma*d)  z*sinh(sigma*d); 1/z sinh(sigma*d)   cosh(sigma*d) ]
 with sigma=propagation_constant(f);
 and z=caracteristic impedance(f);
 T3=Shunt(zeq); //the shunt ABCD matrix for each branch [0 1; 1/zeq 1]
with zeq= z.*(zl+(z*tanh(sigma*L))) / (z+(zl*tanh(sigma*L)));