Exploring the Impact of Triple Modal Reservation on Radiated Emissions: Experimental Insights for PCB Manufacturing

This research paper presents an experimental study that aimed to evaluate the radiated emissions (RE) of circuits incorporating triple modal reservation (MR). To facilitate this investigation, a specialized prototype of a printed circuit board (PCB) was specifically manufactured. The prototype was designed to be used in conjunction with a miniature TEM-cell, allowing for precise measurements of the PCB S-parameters. This enabled the calculation of field strength magnitudes within an up to 5 GHz frequency range. The analysis conducted in this study covered the evaluation of the triple MR PCB performance under the most challenging failure scenarios occurring at the ends of the transmission lines. This comprehensive approach aimed to assess the effectiveness of implementing triple MR in PCB manufacturing, even in the presence of failures. The study identified the most advantageous approach for choosing the active conductor of PCBs with triple MR. This consideration took into account the levels of the PCBs RE and susceptibility. The findings of this research contribute valuable experimental insights into the RE and performance of circuits utilizing triple MR and offer guidance for the development of more reliable PCB designs that comply with electromagnetic compatibility standards.