A full wave analysis of active planar circuits including non-linear loads

In this paper a rigorous electromagnetic analysis of active planar circuits operating as non-linear microwave components is proposed. The approach is based on the association of the integral equation technique with the harmonic balance one. The formulation includes non-linear devices as additional time domain boundary conditions which are achieved through the modification of the excitation vector and the generalised impedance matrix in the method of moments. The obtained numerical results of active microstrip structures are compared to those achieved with a standard equivalent circuit approach and the observed differences are discussed.