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The singularities of the full-wave Green dyadics for general uniaxial bianisotropic media are derived by utilising closed form representations for the static Green dyadics. The result includes previously obtained results for isotropic and bi-isotropic media as special cases.

Recent advances in the parallel multilevel fast multipole algorithm have paved the way for large-scale full-wave electromagnetic simulations. The introduction of the hierarchical partitioning technique and the use of an asynchronous parallel implementation have resulted in a scalable algorithm that runs efficiently, even on low-cost clusters. Presented is the accurate solution of the two-dimensional (2-D) transverse magnetic scattering at both a perfect electric conducting cylinder with a diameter of one million wavelengths and a dielectric cylinder with a diameter of half a million wavelengths.

In the parallel multilevel fast multipole algorithm (MLFMA), there exist two fundamental partitioning schemes for the distribution of the workload across processors: the spatial distribution of boxes and the spectral distribution of field samples. These two schemes can be combined in various manners. It is analytically and numerically shown that, in two dimensions, the recently introduced hierarchical approach yields a scalable parallel MLFMA. For the three-dimensional case, it is proved that only the combination of the hierarchical partitioning scheme and a two-dimensional partitioning of the field samples leads to a scalable algorithm.

A field simulator optimised rectangular-ring microstrip antenna covering the HiperLAN band is described. The proposed design has the advantage of operating with a single feed while avoiding linear polarisation. Measured data from an indoor environment confirm the method of moments (MoM) predictions both with respect to efficiency and with respect to polarisation.

A single-feed rectangular-ring microstrip antenna is proposed for indoor communication under the Bluetooth protocol. The dimensions of the antenna together with the location of the feed point are optimised through field simulations in order to cover the Bluetooth bandwidth and to avoid linear polarisation. The performance and the efficiency of the antenna are illustrated in a real indoor environment.

A new efficient method is outlined for calculating the far-field pattern of waveguide discontinuities. An open configuration is turned into a closed configuration using perfectly matched layers. Using a mode-matching scheme on the resulting configuration, the total field on the discontinuity can be determined. The far-field is calculated by taking the Fourier transform of this field and multiplying it by the Huygens obliquity factor. Results are presented for a GaAs-AlGaAs laser facet and a truncated grounded dielectric slab.

A new approach for determining the reflection and transmission at waveguide discontinuities is outlined. The perfectly matched layer concept is used to transform the open problem into a closed problem. The discrete modes of the resulting planar stratified uniaxially anisotropic media are then used in a mode matching scheme.