We use this method quite a bit.  I even teach it in my Computational Electromagnetics course.  

http://emlab.utep.edu/ee5390cem.htm

If you jump straight into the MoL lecture, you will probably not follow it.  You will have to look at previous lectures.  I recommend the following order:

Lecture 2 -- Maxwell's Equations

Lecture 3 -- Preliminary Topics in CEM

Lecture 4 -- Transfer Matrix Method

Lecture 5 -- TMM Using Scattering Matrices

Lecture 9 -- Perfectly Matched Layer

Lecture 10 -- Finite Difference Method

Lecture 11 -- Maxwell's Equations on a Yee Grid

Lecture 12 -- Finite-Difference Analysis of Waveguides

Lecture 24 -- Method of Lines

Sir,

Thank you for the reply. Yes, i would go through them. Can I contact you for any queries on the same as I am a beginner in this field, but I am quite interested on this topic. 

Sure

thank you very much sir

Sir, my requirement is to model SIW using anyone of computational methods in electromagnetics. Can you please suggest which technique i need to focus on. I have seen papers using different methods like MOM, MOL,FDFD, BI-RMEetc.

Thank you.

@Raymond Rumpf... sir, i have written a matlab code in FDTD to find the propagation constant for a microstrip line. i have a gaussian pulse excitation to the line.

I am facing some difficulties with it like..the fields are not getting updated in the matrix. when the field is being plotted..it shows some values..but the same is not being updated in the corresponding matrix.

could you please tell me as in how to fix the error.

thank you.