| 摘要: | 本研究主要利用導電損失原理，以不飽和聚酯樹脂做為基材，螺旋型銅線與活性碳粉體做為填充材，且以平板型電磁波吸收體結構做為設計基礎，將導電損失材料設計為平板型電磁波吸收體，以0.25mm、0.32mm、0.45mm三種不同之銅線線徑，各別依序纏繞成5圈、 10圈、15圈、20圈、25圈之五種線圈圈數，再各別依1cm、1.5cm、2cm三種螺旋型銅線與螺旋型銅線相互間所排列的間距，將各別纏繞好之螺旋型銅線線圈固定排列於模具內，各別倒入不飽和聚酯樹脂與添加活性碳粉體之不飽和聚酯樹脂，分析探討其兩者所製成之電磁波吸收複合板材對電磁波吸收效果的影響，再各別通入10V、20V、30V之電流於電磁波吸收複合板材，分析探討所製成之電磁波吸收複合板材在有無通入電流情況下，對電磁波吸收效果所造成之影響。
由實驗結果得知，未添加活性碳粉體時，銅線線徑0.25mm，纏繞圈數5圈，線圈間距1cm，試片未通入電流下，電磁波吸收值可達33dB；未添加活性碳粉體時，銅線線徑0.32mm，纏繞圈數25圈，線圈間距1cm，試片通入電流下，電磁波吸收值可達35-39dB；添加活性碳粉體時，銅線線徑0.32mm，纏繞圈數20圈，線圈間距1.5cm，試片未通入電流下，電磁波吸收值可達39dB；添加活性碳粉體時，銅線線徑0.45mm，纏繞圈數10圈，線圈間距2cm，試片通入電流下，電磁波吸收值可達30-40dB。
In this study, by applying the principle of conductive loss, we use the unsaturated polyester resin as a substrate, the spiral copper and activated carbon powder as a filler and the flat electromagnetic wave absorbing structure as the design basis. These above conductive-loss materials are designed as a flat electromagnetic wave absorber. Then, we take the three copper wires in different diameter of 0.25mm, 0.32mm & 0.45mm respectively wound into 5 coil layers of 5 laps, 10 laps, 15 laps, 20 laps & 25 laps. And then, individually by relative distance of 1cm, 1.5cm & 2cm among the three types of spiral copper wires, we separately arrange & fix the individually wound spiral copper coil in the molds . As a follow, individually, we pour the unsaturated polyester resin and the unsaturated polyester resins added with the activated carbon powder into the mold. Further more, we proceed the related analysis & discussion about the impacts in the electromagnetic wave absorption effects of the above 2 electromagnetic wave absorber composite sheet. And then, through the individually power supply of 10V, 20V & 30V to the Electromagnetic wave absorption composite sheets, we analyze & discuss about the electromagnetic wave absorption effects of the 2 electromagnetic wave absorption composite sheets under the situations with or without current energized.
The above research results indicate that, the value of Electromagnetic wave absorption will reach up to 33dB under the testing situations of the copper wire of 0.25mm in diameter with 5 laps winding coils at relative distance of 1cm without adding activated carbon powder while it is not energized with the current. The value of electromagnetic wave absorption will reach to up to 35-39 dB under the testing situations of the copper wire diameter of 0.32mm with 25 laps winding coils at relative distance of 1cm without adding activated carbon powder while it is energized with the current. The value of electromagnetic wave absorption will reach up to 39dB under the testing situations of the copper wire of 0.32mm in diameter with 20 laps winding coils at relative distance of 1.5cm with added activated carbon powder while it is not energized with the current. The value of electromagnetic wave absorption will reach up to 30-40dB under the testing situations of the copper wire of 0.45mm in diameter with 10 laps winding coils at relative distance of 2cm with added activated carbon powder while it is energized with the current. |
