【作者】 吴健；

【导师】 吴群；

【作者基本信息】 哈尔滨工业大学 ， 电磁场与微波技术， 2009， 硕士

【摘要】 随着电子工业的飞速发展,大规模和超大规模集成电路的大量运用,电子器件都向着高速、高集成、微功耗的方向发展,这样便使得集成电路内的绝缘层变得越来越薄,连线与连线之间的距离变得越来越短,大大降低了电子器件的敏感度。静电放电是一个会产生高电压、强电场、瞬时大电流脉冲的过程,它能够以传导和辐射的方式对电子设备造成干扰,因而静电放电对电子设备的影响变得越来越严重,静电放电防护问题也越来越被人们所关注。本文利用数值计算方法——时域有限差分方法(FDTD),通过MATLAB编程,研究了静电放电的辐射特性,以及静电放电辐射场与带孔缝金属腔体耦合的规律。最后利用仿真软件CST,研究了飞机尖端放电对飞机的影响。每次静电放电都会因为放电电压、环境、放电电极等因素的不同,而导致辐射场的不同。为了便于研究,在保留静电放电主要特性的基础上对静电放电模型进行了简化。我们首先将静电放电等效为一位于无限大导体平面上的电偶极子,利用FDTD对静电放电进行仿真,将IEC61000-4-2标准中所规定的人体-金属放电电流波形作为静电放电的激励电流,得到了静电放电辐射场在自由空间的特性,包括辐射场时域与频域特性,近场与远场的区别,电磁场幅度与放电电压的关系等。然后研究了静电放电辐射场与带孔缝金属腔体之间的耦合规律,包括耦合场的时域、频域特性,放电电流方向对耦合场的影响等。最后利用CST仿真飞机尖端放电时,其产生的辐射场对天线的影响及表面电流的分布情况,给我们设计飞机上的各种设备,确保设备不受静电放电的影响提供了依据。更多还原

【Abstract】 With the high development of electric industry, the electronic equipment was developed to high speed, high integrated, lower consumption of power. So, the electronic equipment became more and more sensitive. Electrostatic-discharge (ESD) is a process of high voltage, large E-field, transient high current pulse, which would disturb the electronic equipment by conduction and radiation. So the effects of ESD on electronic equipment become more and more serious and the question of ESD protection is paid more attention by people.In this paper, by means of the FDTD we compute the electromagnetic field generated by the ESD, and find the regulations that the electromagnetic field couple into a metal cavity with a narrow rectangular slot. Finally, we simulate the effects to an airplane when corona discharge occurs on the tip of the airplane.The fields due to an ESD event depend in a complicated wayIn order to evaluate the electromagnetic field, we simply the modeling of the ESD event but reserve the main features of the ESD event. Firstly, we consider the ESD event as a relatively simple dipole model above an infinite conductivity plane. By means of FDTD, using the current waveform defined in the IEC61000-4-2, we get the features of the electromagnetic field generated by the ESD event, including the time domain waveform and frequency domain waveform, the difference between near-field and far-field, the relationship between the amplitude of the electromagnetic field and the charge voltage, and so on. And then, we investigate the regulations that the electromagnetic field couple into a metal cavity with a narrow rectangular slot, including time-domain features and frequency-domain features of the coupled field, how the charging current orientation affect the coupled electromagnetic field. Finally, we stimulate the noise coupled into antenna systems installed on the aircraft and the distribution of the induce current on the surface of the airplane by using CST. The results give us instructions how to install devices on the plane, insuring the devises aren’t to be affected by the ESD events occurred on the tip of the airplane.更多还原