A study on the effect of building on the HF direction finding
The effect of new building on the high-frequency (HF) direction finding (DF) is analyzed. Commercially available software is used to get array manifold of the HF DF system taking the effect of the new building into account. The terrain, building and the array antenna system are modeled. The new building near the antenna system is also modeled to see whether it actually has an effect on the performance of the DF system. Interferometer DF algorithms has been employed.
Dielectric material modeling in the MoM-based code FEKO
The majority of structures of electromagnetic interest contain regions of non-metallic materials. The applicability of a numerical analysis tool is greatly reduced by an incapability or limitation in treating dielectric regions. The treatment of propagation medium properties is inherent in the formulation of field-based analysis tools. In the method of moments (MoM), dielectric regions require extended formulations and additional resources to model. A number of techniques for the optimum representation of these regions has been implemented in FEKO, a commercial MoM-based analysis tool. Each of the available techniques within the MoM have certain applications to which they are better suited. The optimum technique to use is often immediately evident to the inexperienced user. This paper briefly introduces each of the available techniques, and then demonstrate, by way of an example, how the choice of technique can influence the efficiency and accuracy of simulation.
The distinctiveness of Belfast medicine and its medical school.
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