본 연구는 금속성 함체에 개구부가 있는 경우에도 차폐효과를 유지하거나 개선하기 위해 자성 흡수체를 포함한 복합 흡수체를 적용하는 방법을 제시하였다. 제안된 구조는 흡수체를 개구부가 있는 함체 면의 안쪽에 배치하는 것으로, 함체 내부로 들어오는 전자파는 개구부 안쪽에 배치된 흡수체에 의해 1차적으로 줄어들고, 다음으로 흡수체가 함체의 공진 특성을 감소시켜 전기장 세기를 줄이게 되고 결과적으로 차폐효과가 향상된다. 3차원 수치해석을 통해 제안한 구조가 함체의 차폐효과를 개선함을 확인하였다.
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