Viewing the Results

View and post-process the results from the characterised surface in POSTFEKO.

View the E-field above the characterised surface on a Cartesian graph. The results are compared to those calculated with a full solution using MLFMM where the geometry of the FSS element was duplicated to create the finite 31x31 element sheet.
Table 1. Computational requirements
31x31 FSS element sheet Memory Run time
Characterised surface - RL-GO 91 MB 9 sec
Full solution - MLFMM 332 MB 408 sec

Note the significant reduction in computational requirements over the MLFMM solution.

A practical example where the characterised surface is extremely useful is shown below: an FSS nosecone radome is represented using this feature. Due to the size and complexity of the structure, it becomes prohibitive to model and solve with a full wave solution. However it can be solved readily with the characterised surface approach.

Figure 1. E-field above the characterised surface for 2 theta angles.

Figure 2. Full model of the 31x31 element FSS sheet solved with MLFMM.

Figure 3. E-feld distribution through an FSS radome calculated using a characterised surfaces.