A Simplified Radiation Model for Amplitude-Only Near-Field Reconstruction of Multiple Sources on Package Interconnects

This study proposes a novel modal decomposition method to allow reconstructing principal components of radiation sources in multi-interconnect systems from the amplitude-only near magnetic field measurement. Singular value decomposition (SVD) is used to express any radiation field as a linear combination of modes of multiple coupled interconnects. The same method is used for arbitrary dipole distribution. A suitable noise model is determined using only a few principal modes, rather than a large quantity of dipoles. For amplitude-only field data, the dipole model is solved by determining the coefficients of modes using a pattern search optimization, which is a relatively simple and time-saving algorithm. The proposed method is validated using a numerical example of multi-interconnect radiation. The field that is reconstructed using the proposed model exhibits a high degree of consistency with the actual spatial fields in terms of field amplitude and phase. Thence, the de-sense issues of the multi-interconnect systems can be effectively determined by the superposition of the effects from a few principal modes.