matlab code for transmission coefficient

Hello guys, I already had written the 2D FDTD TM/TE source code in Matlab. It visualized very well the how wave propagate. I need to extract out the transmission coefficient. First, I let the whole medium be vaccum. So theoriticaly, I should get 1 for the transmission but unfortunately I cant get 1. Anyone please help me out. Thanks.

Hey..

can you explain what kind of source implementation you have in your code...
and without knowing your code no one can help you out in this...
so, better you post your code..

cheers

Ez(1,Npy-(NMlat-1)/2:Npy+(NMlat-1)/2)=Ez(1,Npy-(NMlat-1)/2:Npy+(NMlat-1)/2)+sin(W*m*Dt)

above is my source which i implement in my code.

can u sent me your Matlab Programme for the visualization of wave propagation. i shall be highly obliged 2 u..............

Where is your code ? Pl. send that code to my email-ID: g_pallai@yahoo.co.uk.

Eventually, I have give up this code. I have used the meep from MIT to run my simulation. Easier and faster. Thanks.