CAJ | 학술논문

材料电磁屏蔽效能的窗口法测量本质上是一种孔缝耦合效应的测量,具有低频响应不好,测量误差大等不足.且窗口法难以实现材料对电磁脉冲的屏蔽效能的测量.针对窗口法的不足,提出了试件法测量材料电磁脉冲屏蔽效能的试验方法.给出了试件法的原理、试件外环境场的获取方法及试件内测点的布局等关键技术.与窗口法相比,试件法具有试验简单、不需要微波暗室、试验效率高,试验数据可靠等一系列优点.利用试件法对某特种水泥材料的电磁脉冲屏蔽效能进行了测量,测量结果与理论分析符合得较好,证明了该试验方法的有效性.
재료전자병폐효능적창구법측량본질상시일충공봉우합효응적측량,구유저빈향응불호,측량오차대등불족.차창구법난이실현재료대전자맥충적병폐효능적측량.침대창구법적불족,제출료시건법측량재료전자맥충병폐효능적시험방법.급출료시건법적원리、시건외배경장적획취방법급시건내측점적포국등관건기술.여창구법상비,시건법구유시험간단、불수요미파암실、시험효솔고,시험수거가고등일계렬우점.이용시건법대모특충수니재료적전자맥충병폐효능진행료측량,측량결과여이론분석부합득교호,증명료해시험방법적유효성.
Windows method is a measurement of slot coupling effect in nature when it is used to measure material's shielding effectiveness. The error of measurement will become serious when it is used to meas-ure material's shielding effectiveness in low frequency band. It is difficult to measure material's shielding effectiveness of electromagnetic pulse with Windows method. Device under test method (DUT method) was presented in this paper to overcome the limitations of Windows method in material's shielding effec-tiveness test. The method can be used to measure any material's shielding Effectiveness effectively through th design and the test of the DUT.The method was used to measure shielding effectiveness of specialcement .Compared with teoretical analysis,the measurement result prove the DUT method to be very efficient in material's shielding effectiveness test.