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S_Tu_D_Room4: EMC Diagnostics of Complex Systems (II)
4:00pm - 5:00pm
Session Chair: Vladimir Mordachev Session Chair: Eugene Sinkevich
Experimental Validation of Applicability of Low-Level Test Methods to Assess the Effectiveness of Shielding from High-Power Electromagnetic Fields
Vladimir Mordachev1, Eugene Sinkevich1, Dzmitry Tsyanenka1, Oleg Mikheev2, Konstantin Sakharov2, Alexander Sukhov2, Vladimir Turkin2, Wen-Qing Guo3, Xie Ma3, Hao-Yue Zheng3
1Belarusian State University of Informatics and Radioelectronics, Belarus; 2All-Russian Scientific Research Institute for Optical and Physical Measurements (VNIIOFI); 3China Electronics Technology Cyber Security Co., Ltd.
An experimental validation of the linearity of transfer characteristics for elements of the shielding-type protection of an onboard system against high-power electromagnetic fields is carried out by considering the examples of a metal mesh and a braid of a coaxial cable. The validation technique is based on a comparison of the protection element’s amplitude-frequency characteristics obtained at different levels of the electromagnetic test disturbance. The validation is performed for ultra-wideband pulsed disturbance with amplitude up to 50 kV/m, pulse duration of 230 ps, and pulse rise time of 140 ps. The results of the experiments confirmed the applicability of the linear model to the description of the protective properties of shielding elements in the specified range of levels of external disturbance. This fact substantiates the possibility of using the protection element’s frequency characteristics measured at low levels of test disturbance to describe the operation of this element in case of protection against disturbances with amplitudes up to 50 kV/m.
Worst-case model of bonding strap effectiveness for equipment case irradiated by an electromagnetic field
Yauheni Arlou, Tsyanenka Dzmitry
Belarusian State University of Informatics and Radioelectronics, Belarus
The worst-case model to estimate bonding strap effectiveness (the ratio of induced voltage of the interference on equipment case irradiated by an electromagnetic field and grounded with a bonding strap to the voltage of the interference on ungrounded equipment case) is built. The developed computationally efficient model accounts for the resonance in the oscillating circuit formed by bonding strap inductance and the capacity between equipment case and ground plane. The model is designed to analysis of intersystem and intrasystem EMC and makes it possible to estimate increase in voltage on the case for the worst conditions. In addition, a rough worst-case estimate of the absolute value of voltage on equipment case is presented. The model can be used to estimate interferences induced at the shields of cables connected to equipment case. Correctness of the model was proved through validation by the method of moments (the maximum underestimate was 2 dB).
The effect of low-grade repeaters on DCS1800 base station receivers in the frequency band 1710–1785 MHz
Vadym Blagodarnyi, Volodymyr Korsun
State Enterprise Ukrainian State Centre of Radio Frequencies, Ukraine
This article describes the research results of impact of low-grade or incorrectly tuned repeater emission on DCS1800 base station receiver in the frequency band 1710 - 1785 MHz