in a "brute force" FDTD codes the geometry is discretized by using a staircase mesh. There is a difference between the simulated and the "true" geometry.
Consider a round patch antenna. If you discretize a round patch by a rectangular mesh the patch area will change -> shift in resonance frequency.
Some Time Domain Codes (such as CST) use additional techniques to correct for this error.
Where can i find more details on Staircase error....
and one more small query..
is this error comes into action when we simulate a electromagnetic signal in 2-D space....
i am asking this question becoz when i simulated.. i found energy changes on a circular wavefront in a lossless media...
i think that the reason for the energy change is this Staircase error..
Where can i find more details on Staircase error....
and one more small query..
is this error comes into action when we simulate a electromagnetic signal in 2-D space....
i am asking this question becoz when i simulated.. i found energy changes on a circular wavefront in a lossless media...
i think that the reason for the energy change is this Staircase error..