Abstract
We propose a new index for predicting the optimum layout of noise sources, that is designed to improve the communication performance of digital wireless equipment. In our previous studies, we developed a design method for optimizing the layout of a noise source using the correlation between the magnetic field distribution of the noise source and that of the antenna. However, this method does not allow easy comparison between different items of equipment. In this paper, we quantitatively and visually propose a new index that can predict the signal bit error rate by using the antenna interference power, obtained from the weighted magnetic field product that has been calculated from the magnetic field distributions of the noise source and the antenna. We have confirmed that the optimal layout of the noise source can be predicted using our proposal method in digital wireless equipment to minimize intra-EMC. We have further discovered a new index in which the optimal layout of the noise source can be found in contour formatted figures with good visibility.
