Calculation of the current distribution on three-dimensional wire-antenna structures

This paper discusses the calculation of the current distribution on wire-antennas which are arbitrarily oriented in space. Especially a technique is outlined which enables the user to treat the junction geometry of different cylindrical and thin rods by means of the method of moments. The method can be applied on problems involving both simple junctions and complicated interconnected wires and therefore is characterized by a high flexibility. Furthermore, it is very convenient for programming purposes. Sub-domain expansion functions are used, the arrangement of which in the direct vicinity of the junction on the basis of the continuity equation is shown.