There are many different types
of EM modeling and simulation problems, and the use of well defined cases
with known solutions are an excellent means of validating a modeling
tool or procedure. However,
it is impossible to define every possible case and create a suitable
reference problem. Therefore a variety of validation cases were
created to span the range of problems that may be encountered. Users
are encouraged to select validation cases that most closely match their
types of problems, recognizing that more than one validation case may
be needed to cover the range of problems they are interested in. It
should be noted that the library of standard cases is dynamic and additional
materials will be added over time.
This recommended practice defines three types of validation cases: canonical,
benchmark, and standard. On this web site, multiple problems of
each of the three types are provided.
**Canonical Problems**
The simplest problems are straightforward canonical problems, that often
provide significant challenges for full-wave EM techniques and codes
due to the need to “break” the physical geometry into small
parts. The input impedances (real and imaginary) and far field
radiation patterns are detailed for each problem. These canonical
validation problems have a closed form solution that will allow comparison
of the user’s simulation results to the theoretical results.
**Benchmark Problems**
The next level in complexity is ‘benchmark’ validation problems. These
problems tend to have a simple geometry with only a few objects, so they
represent specific types of problems often encountered in the field of
EMC. Although these problems do not have closed form solutions,
many of them have been previously solved by a number of different codes
and techniques. Thus, the user’s simulation results should
be compared against these previously obtained results.
**Standard Validation Problems**
The highest level of complexity is ‘standard’ validation
problems. These problems have a complex geometry and are intended
to represent real-world scenarios. As with the benchmark validation
problems, no closed form solution is available but many of these problems
have been solved by a number of different codes and techniques. Once
again, the user’s simulation results should be compared against
these previously obtained results.
The specific problems are numbered to coinside with the numbering within
the IEEE Best Practice (P1597.2) document. Unless otherwise specified,
all equations in this document are MKS rationalized. |