ABSTRACT
There are a number of practical applications for which the embedding of a lumped circuit element into the planar circuitry is of high importance. Examples from this category can be found in antenna engineering, for instance, where shorting-post, resistoror capacitor-loaded antennas offer the possibility of efficient antenna size reduction, broad-banding or/and the radiation-pattern/polarization control. This chapter explores from the contour-integral reciprocity formulation, a general concept of the lumped-element inclusion in Time-Domain Contour-Integral Method is introduced. It addresses the inclusion of basic linear lumped elements. Namely, the embedding of an inductor, a resistor and a capacitor are each described in detail. The formulation hence makes it possible to evaluate the impact of inclusions separately without having to evaluate the bare structure over again in a new simulation run. Finally, the pulsed voltage responses as observed across the embedded elements are evaluated and validated using Finite-Integration Technique.
