Radiated emissions conversion from anechoic environment to OATS using a hybrid genetic algorithm-gradient method

A novel method for predicting the equivalent OATS radiated emissions of a DUT from anechoic chamber measurements is presented. This method allows the use of a single environment (the anechoic chamber) for both radiated emissions and immunity tests. It is based on the substitution of the DUT by an equivalent set of elemental dipoles (using a hybrid genetic algorithm-gradient method) which radiates the same anechoic field. Since the field generated by an elemental dipole is known, OATS equivalent radiated emissions can be calculated using image theory. Simulations show the viability and usefulness of the new method.