PCB上晶体振荡器的EMR场分布分析

2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE) Pub Date : 2018-12-01 DOI:10.1109/ISAPE.2018.8634183

Zhiwei He, Hongfu Guo

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引用次数: 1

摘要

在PCB(印刷电路板)上，晶体振荡器电路是电磁辐射(EMR)干扰的主要来源。其EMR特性的仿真与分析是PCB电磁兼容设计的关键任务之一。本文利用HFSS建立仿真模型，对晶体振荡器在不同情况下的EMR特性进行了仿真分析。得到了电场强度与频率的关系。仿真结果表明，两管脚中间区域场强较大。当壳体接地时，壳体周围的场强几乎为0。当PCB线槽连接时，场强变化集中在线槽的末端。接接地电容时，最大场强减小77.02%。研究结论为改进PCB的电磁兼容设计提供了重要的理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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EMR Field Distribution Analysis of Crystal Oscillator on PCB

On PCB (Printed Circuit Board), the crystal oscillator circuit is the main source of electromagnetic radiation (EMR) interference. The simulation and analysis of its EMR characteristics is one of the key tasks of PCB EMC (Electro Magnetic Compatibility) design. In this paper, the simulation models are established by HFSS, and the EMR characteristics of crystal oscillator in different cases are simulated and analyzed. And the relationships between the electric field intensity and frequency are got. The simulation result shows that the area of the larger field intensity is concentrated in the middle part of the two pipe feet. When the shell is grounded, the field intensity around the shell is almost 0. When the PCB wireway is connected, the field intensity changes to concentrate at the end of the wireway. When the grounding capacitance is connected, the maximum field intensity decreases by 77.02%. The conclusion of this research provides an important theoretical basis for improving the EMC design of PCB.

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2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

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