| 스크린 인쇄공정으로 제조한 그리드 전도막의 전자기 노이즈 흡수특성 |
| 김민성, 김성수 |
| 충북대학교 신소재공학과 |
| Electromagnetic Noise Absorption by Conductive Grid Films Prepared by Screen Printing Process |
| Min-Sung Kim, Sung-Soo Kim |
| Department of Advanced Materials Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea |
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Received: 30 March 2017; Accepted: 28 April 2017. Published online: 1 August 2017. |
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| ABSTRACT |
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To realize focused design near-field conduction noise absorbers for sub-GHz frequencies, this study proposes screen-printed conductive grid films. The films’ advantages include large-scale production and easy control of electrical properties. A conductive grid film with a resistance value of approximately 70 Ω was screen printed on polyimide film substrate and its conduction noise absorption was evaluated using a microstrip line. High power absorption was experimentally verified at low frequencies below 1 GHz by varying the grid width (w). The dominant loss mechanism was ohmic loss. Approximately 85% power absorption was obtained at 0.5 GHz for a grid film of w = 1.5 mm. Compared with a conventional magnetic sheet absorber, the conductive grid film exhibited a superior power absorption particularly at sub-GHz frequencies, and at a much reduced thickness of approximately 20 μm. |
| Keywords:
conductive grid films, screen printing, electromagnetic noise, absorbers, electric properties, magnetic properties. |
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