Problems of impedance calculation in FDTD

[Players]

dipole impedance fdtd

I have 2 problems in FDTD to get help.First thank you for your reading.

1. Zin(w)=V(w)/I(w), how to locate the contour of H for I(t)? Take a dipole as an example. The contour should be around the feed gap or around the arm?
2. When we calculate a strip dipole (thickness=0), a contour for I(t) is also needed.Should I include the H components along the direction of thickness?


thank you for your answers!

 

[Players]

fdtd+dipole+impedance

Can anyone help me?

 

[xi2009]

I also met this problem!I think for the wire antenna,we use the for H-field around the gap to caculate the i(t).