计量学报2026，Vol.47Issue(3)：414-421,8.DOI:10.3969/j.issn.1000-1158.2026.03.13
基于同轴多谐振荡器标样的屏蔽效能测试系统校准技术研究
Calibration Technique for Shielding Effectiveness Test Systems Based on a Coaxial Multivibrator Reference Sample
摘要
Abstract
The triaxial method for testing the shielding effectiveness of metallic communication cables is widely used in electromagnetic compatibility(EMC)testing.However,its metrological traceability system remains incomplete,and there is currently no effective calibration specification available.To this end,this paper proposed an integrated calibration technique based on a coaxial multivibrator as a high-frequency reference sample.Based on the working principle of the triaxial test system,a coaxial multivibrator with controllable strong resonant characteristics was designed as the high-frequency reference sample,effectively suppressing high-frequency oscillations caused by inherent distributed parameters of the system.Using electromagnetic simulation software,the structure of the reference sample was optimized,and the optimal dimensional combination was determined,enabling precise assignment of the reference sample via CST software simulations.Experimental validation of the developed high-frequency reference sample demonstrated a repeatability error of less than 0.26 dB,long-term stability better than 0.45 dB,and a maximum En value of 0.61 when compared with results from a typical test system.The proposed method resolves the traceability issues of shielding effectiveness testing systems in the high-frequency range and can be extended to calibrate cable shielding effectiveness test systems within the 0.3～3 GHz frequency range.关键词
电学计量/通信电缆/三同轴法/屏蔽效能/高频标样/CST仿真/重复性/量值溯源Key words
electrical metrology/communication cable/triaxial method/shielding effectiveness/high frequency standard sample/CST simulation/repeatability/metrological traceability分类
通用工业技术引用本文复制引用
丁翔,罗永斌,张成,谭艳清..基于同轴多谐振荡器标样的屏蔽效能测试系统校准技术研究[J].计量学报,2026,47(3):414-421,8.基金项目
广州市增城区创新创业领军团队项目:精密仪器设备计量测试技术研究及产业化(202102003) （202102003）
