Inductive Coupling Estimation System Using Loop Current Model of Mounted Circuit Components

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04497
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Akita University
• Principal Investigator: Muroga Sho 秋田大学, 理工学研究科, 准教授 (60633378)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 磁気結合係数 / 磁界結合 / 近傍磁界計測 / 等価磁界源モデル / 機械学習 / EMC

Outline of Final Research Achievements

A novel estimation method of magnetic coupling coefficients between printed-circuit-board-level traces and components using a near field information was investigated and proposed. First, a simple one-turn loop current model with uniform current distribution was proposed as the equivalent magnetic source of the traces. The measured magnetic near-field distributions above the traces at 1 GHz were input to the trained classifier or regressor to estimate the geometry of the loop current models. Next, the magnetic coupling coefficient between two traces was estimated through calculating the coupled magnetic flux between the estimated loop current models. The magnetic coupling coefficients between the loop current models estimated by measured magnetic near-field distribution agreed with the coupling coefficients calculated by the full-wave simulation within 10%, which indicates the feasibility of estimating the magnetic field coupling by the proposed method.

Free Research Field

計測工学，電子デバイス・電子機器

Academic Significance and Societal Importance of the Research Achievements

本提案手法を利用すれば，高周波回路基板内の予期しない電磁結合を定量的に把握することが可能になる。さらに，配線や素子から漏洩する近傍磁界に関する情報を，等価磁界源モデル情報として保存し，情報を集めてデータベース化することが可能となる。今後の機器の小型化・高速化に伴い，配線・素子間の電磁結合を考慮した設計の必要性は大きくなると予想されている。本研究の成果は，次世代小型，高周波機器の試作のため活用することが可能であり，産業界に広く貢献できると思われる。