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| Simulation Analysis of Electromagnetic Shielding Effectiveness on Pulse Laser Transmitting Module |
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| DOI：10.7643/issn.1672-9242.2022.11.008 |
| KeyWord:pulse laser transmitter module electromagnetic compatibility cylindrical cavity with hole double shielding shielding effectiveness HFSS simulation |
| Author | Institution |
| SUN Wen-dong |
School of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| BA Shu-hong |
School of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| CHEN Hui-min |
Key Laboratory of Electromechanical Dynamic Control, Beijing Institute of Technology, Beijing , China |
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| Abstract: |
| This paper aims to improve the electromagnetic compatibility of pulsed laser transmitting module. Based on the electromagnetic shielding mechanism of cavity, HFSS software was used to establish the cavity model of pulsed laser emission module, and the electromagnetic shielding effectiveness of cavity was simulated and analyzed in terms of electromagnetic sensitivity and electromagnetic interference. The shielding effectiveness of the double-layer shielding cavity can reach 28 dB when the electromagnetic radiation frequency is from 1 kHz to 100 kHz. When the electromagnetic wave irradiation frequency is 0.2-18GHz, the shielding effectiveness reaches 47 dB. When the radiation frequency of electromagnetic wave is between 1 kHz and 100 kHz, the shielding effectiveness of cavity increases with the increase of frequency. When the radiation source is excited externally, the shielding effectiveness of the double-layer shielding cavity is higher by using the outer layer of iron and the inner layer of copper. When the electromagnetic wave irradiation frequency is 0.2-18 GHz, the shielding effectiveness of the cavity decreases with the increase of the frequency, and the resonance effect occurs. When the cavity thickness is equal, the shielding effectiveness of double-layer shielding is higher than that of single layer shielding. When using cable connectors instead of holes for signal transmission, cavity shielding effectiveness increases. |
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