Deriving admittance matrix for shortened quarter-wavelength transmission line

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For equation (1) , I am trying to use MATLAB y2abcd() function to convert admittance matrix to ABCD matrix.

However, I am getting mismatch between MATLAB answer and actual theoretical result.



 

promach said:
how to derive equation (2) ?
and is the imaginary constant j needed in equation (1) ?
Click to expand...
There is no help, since your questions are too easy.
This is very true for your all posts.
Always your questions are too elementary and easy to answer.

promach said:
For equation (1) ,
.........................................................................
However, I am getting mismatch between MATLAB answer and actual theoretical result.
Click to expand...
Current direction of I2 is defined like attached figure in Y-parameter.
 

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