The paper presents a reliable model for the susceptibility analysis of a
Rectenna (Rectifying Antenna) in the context of microwave energy transfer.
The approach allows to take into account both distributed electromagnetic
portions of the antenna and the rectifier circuit including lumped elements.
From the 3D electromagnetic modelling of the structure the input impedance
is obtained as a function of frequency. Then a rational approximation of the
Laplace variable is chosen to describe the port behaviour. The technique
provides a straightforward way for a time domain simulation using Pspice or
The proposed approach can be efficiently used to provide a non-linear
time-domain study in the framework of EMC (Electromagnetic Compatibility)
for various electronic equipments involving printed circuit-boards, internal
structures of electronic components or Micro-Electro-Mechanical Systems