Overview of MM and UTD methods at the Ohio State University [radar target scattering]

Techniques appropriate for low and high frequency numerical evaluation of the scattered fields from complex shapes are discussed. Object size in terms of wavelengths dictates the type of solution to be used. For targets in and just above resonance, the method of moments (MM) is used. The limitation in this case is that the scatterer cannot be too large in terms of the wavelength. For radar targets in the microwave band, the uniform geometrical theory of diffraction (UTD) and modifications thereof form the basis for the computation. This has the basic limitation that the scattering mechanisms need to be known and included in the model. Examples are given for both frequency regimes