• Title/Summary/Keyword: AMP (Amorphous Metal Powder)

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Development of EM Wave Absorber for Port Logistics RFID System by Using Amorphous Metal Powder (Amorphous Metal Powder를 이용한 항만 물류 RFID 시스템용 전파흡수체 개발)

  • Choi, Dong-Soo;Yoo, Gun-Suk;Kim, Dong-Il
    • Journal of Navigation and Port Research
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    • v.34 no.1
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    • pp.27-31
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    • 2010
  • In this paper, we developed an EM wave absorber having the absorption ability of more than 15 dB for port logistics RFID system by using AMP. Firstly, we fabricated EM wave absorber by using AMP and CPE(Chlorinated Polyethylene) with different composition ratios 80:20 wt.% and 85:15 wt.%. Secondly, we designed the optimum EM wave absorber using the calculated material constants obtained from measured input impedance of the samples. Therefore, EM wave absorber with absorption ability of 17.5 dB at 433 MHz when composition ratio of AMP:CPE=85:15 wt.% and thickness of 5.5 mm.

A Study on Smart Heat Radiating Sheet for Protecting Electronic Equipments on the Ship

  • Choi, Dong-Soo;Kim, Dong-Il;Kim, Doh-Yeol;Choi, Dong-Han;Kil, Gyung-Suk;Kim, Jae-Hwan
    • Journal of Navigation and Port Research
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    • v.35 no.7
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    • pp.569-573
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    • 2011
  • In this paper, we developed a Smart Heat Radiating Sheet(SHRS) having the absorption ability of more than 15 dB, and thermal conduction rate more than 20 W/mk for port logistics RFID(Radio Frequency IDentification) system by using AMP(Amorphous Metal Powder) and shielding sheet. Firstly, the EM(Electro_Magnetic) wave absorber samples were fabricated by using AMP and CPE (Chlorinated Polyethylene) with different composition ratios of 80 : 20 wt.% and 85 : 15 wt.%, respectively. Secondly, we fabricated the Smart Heat Radiating Sheet using the shielding sheet to attach EM Wave Absorber. As a result, the Smart Heat Radiating Sheet with absorption ability of 16 dB at 433 MHz and thermal conduction rate is 24 W/mk has been developed with the composition ratio of Amorphous Metal Powder : CPE = 85 : 15 wt.% and thickness of 5.5 mm.

A Study on the EM Wave Absorption Characteristics of Amorphous Metal Powder and Sendust Absorbers for RFID System (RFID 시스템용 Amorphous Metal Powder 및 Sendust 흡수체의 전파흡수 특성 연구)

  • Choi, Dong-Soo;Yoo, Gun-Suk;Choi, Dong-Han;Kim, Dong-Il
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2010.04a
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    • pp.159-160
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    • 2010
  • In this paper, we compared the absorption abilities of AMP and Sendust EM wave absorbers for a port logistics RFID system. Firstly, we fabricated EM wave absorber samples by using each absorbing material, AMP or Sendust, and CPE (Chlorinated Polyethylene) with composition ratios 85 : 15 wt. %. Secondly, we designed the optimum EM wave absorber using the calculated material constants found from the measured input impedance of the samples. Therefore, we confirmed that imaginary factor of complex relative permeability influences absorption ability and that AMP is better absorbing material than Sendust at the frequency band of 433 MHz.

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