Numerical Microwave Synthesis by Inversion of the TLM Process

In this paper, the principles of a novel TLM time domain synthesis procedure for microwave structures are presented. This procedure permits the reconstruction of primary and induced sources from their radiated fields in space and time by reversing the TLM time stepping process. The ability to reconstruct induced sources implies that the topology of discontinuities and scatterers in the field space can be determined from the full knowledge of the incident and the scattered fields, thus opening the way to numerical field synthesis of microwave structures as an alternative to synthesis by iterative optimization.