ABSTRACT
The compensation theorem is a standard tool of linear-network theory that makes it possible to efficiently evaluate the impact of varying network elements on currents in the circuit at hand. Owing to the possibility of extending the compensation theorem to its general electromagnetic (EM) (vectorial) form, it can be naturally expected that one can find a general expression for the change of N-port planar circuits scattering properties due to the change in its loading elements. The confirmation of this expectation is the main result of this chapter, where such an expression is derived entirely in the Time-Domain (TD) with the aid of the EM reciprocity theorem of the time-convolution type. Pulsed EM scattering properties of a multi-port planar circuit are analysed using the introduced TD compensation theorem. In order to validate the introduced TD compensation theorem, pulsed EM scattering from a 3-port planar circuit is analysed numerically.
