In this article, a stochastic model is proposed for estimation of electromagnetic radiated emission from printed circuit board (PCB) layout. Considering the arbitrary nature of the PCB layout by radiation resistance, the radiated power density is estimated analytically. The model employs stochastic passing signals as layout trace excitation. The approach is conducted on a designed and fabricated test board. The total radiated power from the PCB layout can be as high 11.5 nW in 2.4GHz–2.5 GHz and 2.8uW in 1 MHz to 3 GHz. An important achievement of the model is its fast estimation of total radiated power for a given PCB layout, rather time/cost consuming experimental measurements and software simulations. For the designed test board, the full-wave simulation time lasts 5 h, while the proposed mathematic model gives the result within 30s on a device with Intel Core i5 processor and 8 GB RAM. The approach can be considered as a fast and preliminary verification step in estimation of radiated emission from PCB layout.

在本文中，提出了一个随机模型来估计来自印刷电路板 (PCB) 布局的电磁辐射。考虑到辐射电阻对 PCB 布局的任意性，辐射功率密度是通过分析估计的。该模型采用随机通过信号作为布局跟踪激励。该方法是在设计和制造的测试板上进行的。PCB 布局的总辐射功率在 2.4GHz 至 2.5 GHz 范围内高达 11.5 nW，在 1 MHz 至 3 GHz 范围内高达 2.8uW。该模型的一个重要成就是它可以快速估计给定 PCB 布局的总辐射功率，而不是耗时/成本高的实验测量和软件模拟。对于设计的测试板，全​​波仿真时间持续 5 h，而建议的数学模型在配备 Intel Core i5 处理器和 8 GB RAM 的设备上在 30 秒内给出结果。该方法可被视为估计 PCB 布局辐射发射的快速初步验证步骤。