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This paper proposes the methods of high intensity radiated field (HIRF) testing for civil aircraft. It introduces how to eliminate the background noise and select the frequency list for HIRF testing at first. Then, the method of LLSC calibration and LLSC test is proposed along with an automatic test system of LLSC testing. After that, how to design a mode stirrer and validate the performances of it...
Electromagnetic environment has become more complex due to the rapid development of modern electronic techniques, and electromagnetic compatibility (EMC) problems caused by outside interference have become a big issue for many devices, and cannot be ignored. To minimize the impact from outer electromagnetic interference, metallic enclosure is widely used as a shield. Therefore, shielding effectiveness...
This paper proposes an on-site fast test system for EMC measurement. It introduces the principle of GTEM cell at first. Then, a novel miniaturized GTEM cell is proposed based on the theory and calculation methods of GTEM cell's characteristic impedance and interior strength of field. It is small in size and convenient to move, specially designed for EMC site fast test. The models of GTEM cell are...
High conductive fiber reinforced composite materials are widely used in several industry applications due to the excellent mechanical properties and good performance of shielding effectiveness. In this paper, equivalent modeling of a dielectric matrix filled in with a square array of long conductive fibers is considered. A modified homogenization model is presented by taking the skin effect into account...
The dipole antennas are widely used for RF communication applications and usually provide a potential front-door path of coupling electromagnetic pulse (EMP). In this paper, the transient current response of dipoles exposed to EMP is calculated with an equivalent circuit based model, which consists of an equivalent pulse voltage source and an antenna equivalent circuit. A center-driven wire dipole...
Ringing signal has widely existed in digital circuits like integrated circuits, DC-DC circuits, etc. The ringing appears in the roads due to the parasitic effect in high frequency or the impedance mismatch, and may cause logical errors in signal processing, as well as electromagnetic interference (EMI) to other devices. To have a deeper understanding of the electromagnetic characteristics, we analyze...
Electromagnetic radiation emission from cable [1] is one of the most important factors to cause electromagnetic compatibility (EMC) problem for the inverter, which may directly lead to the performance degradation or failing to work normally for the device. In this paper, the characteristics of the electromagnetic radiation emission from coaxial cable will be researched by means of simulation and calculation...
The normal mode helical antenna (NMHA) is widely used for RF communication applications and usually provides a potential front door path of coupling electromagnetic pulse (EMP). Many numerical methods are employed to analyze the transient response of antennas under EMP, such as time-domain finite difference (FDTD) and time domain integral equation (TDIF) methods. While the numerical methods give accurate...
This passage is to study the near-field interference characteristics of the sensor when taking the test of radiated emission. In addition to the influence on the test data from the probe factor, the sensor itself would cause interference to the electromagnetic environment around the source (taking a simplified RF integrated module for instance here)in the test. By means of HFSS simulation[1]and calculation,...
This paper proposed a novel segmented equivalent circuit modeling method of TSV, which is the key technology of 3D-IC. The electrical parameters of TSV are extracted firstly and then used to finish the equivalent circuit of single TSV and double TSVs structure. The segmented modeling method is realized by segmenting the TSV structure into three parts, namely the top, middle and bottom of the TSV structure...
In this paper, 3D ray tracing algorithm was constructed based on the modified IRI model and IGRF geomagnetic field model. In short-wave detection, it can be used to predict the electromagnetic parameters of the receiving point, such as, the receiving area, maximum available frequency and the distribution of the group delay etc, which can help to determine the suitability of the communication. As an...
The purpose of this paper is to assess electromagnetic environment of nuclear magnetic resonance (NMR) device in hospital, in considering of the proposed construction of subway lines which would pass the hospital. A method is proposed to quantitatively analyze and evaluate electromagnetic interference of NMR device. It is derived through the analysis and evaluation: when subway line passes through...
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