Measurement validation of the dipole-moment model for IC radiated emissions

A procedure is proposed to extract equivalent dipole-moment model for the real integrated circuit (IC) from the near-field scanning data. The radiation fields from the extracted dipole-moment model match well with the measured ones in both near- and far-fields. Therefore, the dipole-moment model can be applied to take the place of real IC in the full-wave simulation tools, to predict the IC's radiated emissions with the presence of other structures. Radiation from a heat sink excited by the dipole-moment model of an IC has been simulated by HFSS. The simulated results were found to agree with those measured. Thus, the extraction procedure of dipole-moment models for IC radiation emission has been validated.