A Study on EMC Design Theory for PCB in High-Speed/High-Frequency Information Technology

因为印刷电路板（PCB）上的迹线变得高密度并且具有各种布局以减小尺寸，所以诸如串扰、信号完整性等的电磁兼容性（EMC）问题对于现代高速/高频信息技术设备已经变得至关重要。在本研究中，我们将重点放在与PCB相关的主题上。1.电源/接地平面问题在最新的PCB中，平行平面是为电源/接地分配准备的，而不是电线。然后，有很多过孔穿过平面，从而在平面之间的空间内激发出某些频率的电磁场，即产生谐振。我们从电路理论的角度研究了这个问题，使用等效电路来表示平面上的谐振。2.穿过缺陷接地层的迹线中的信号完整性/串扰问题存在穿过缺陷接地层的信号线，例如，具有狭缝的分离平面。当两个跟踪l ...更多信息 线与分开的接地层交叉，并有一个缝隙，在高电平时会产生串扰。我们对此进行了研究，以建立等效电路模型，通过检查trance线和槽线之间的耦合机制，从实验讨论和数值计算（在论文审查）。该模型在设计此类线路布局时将是有用的。3.邻近传输线的信号完整性/串扰问题对于平行传输线，直到现在，可以从理论上估计传输特性，例如信号完整性和串扰。但对于非平行线，传输线理论中没有建立表征其特性的理论。本文主要研究自由空间中任意方向直线的问题。研究了利用模态分析技术分析多迹线时的重要问题（论文综述中）。4.迹线的抗扰度/辐射问题外部电磁场与传输线的耦合是抗扰度问题的一个基本概念。这个问题一直被研究到现在。从电路理论的观点来看，传输线的辐射问题可以从互易性的概念来考虑。我们提出了一种技术来估计坡印亭矢量表示的跟踪线的能量流，调查的物理机制的问题。少

Electromagnetic compatibility (EMC) problems such as crosstalk, signal integrity, and so on, have become crucial for modern high-speed/high-frequency information technology equipment because trace lines on a printed circuit board (PCB) become in high density and are of various layout to reduce the size. In this research, we focused the topics related with PCB.1.Power/ground plane problemIn the latest PCB, parallel planes are prepared for power/ground distribution, not wire lines. Then, there are such many via hole passing the planes that electromagnetic fields of certain frequencies are excited inside the space between the planes, that is, resonance would be generated. We studied this topic at a viewpoint of circuit theory using equivalent circuits representing the resonance at the plane.2.Signal integrity/crosstalk problems in trace lines crossing the defected ground planeThere are signal lines crossing defected ground planes, for example, separated plane with a slit. When two trace l … More ines cross the separated ground plane with a slit, crosstalk would be occurred in high level. We studied this to establish the equivalent circuit model by checking the coupling mechanism between trance lines and a slot line from experimental discussions and numerical calculations (under paper reviewing). This model would be useful when designing such line layout.3.Signal integrity/crosstalk problems in nearby transmission linesFor parallel transmission lines, transmission characteristics such as signal integrity and crosstalk can be estimated until now theoretically. But for non-parallel lines, the theory for representing the characteristics is not established in transmission line theory. We focused on the problems for lines in arbitrary directions in free space. And serious topics for analyzing multi-trace lines were studied when using a modal analysis technique (under paper reviewing).4.Immunity/radiation problems in trace linesThe coupling of external electromagnetic fields to transmission lines is a basic concept for immunity problem. This problem was studied until now. From a viewpoint of circuit theory, the radiation problem from a transmission line can be considered from a concept of reciprocity. We proposed a technique to estimate the Poynting vector denoting the energy flow in the trace lines to investigate the physical mechanism of the problem. Less