• Title/Summary/Keyword: Soild State Drive

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A Study on the Disruptive Technology of Secondary Memory Unit: Focus on the HDD vs SSD Case (보조기억장치의 와해성 기술 사례에 관한 연구: HDD 대 SSD 사례를 중심으로)

  • Lee, Sang-Hyun
    • Journal of the Korea Convergence Society
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    • v.4 no.1
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    • pp.21-26
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    • 2013
  • Due to a lack of research regarding disruptive technologies in domestic research, the purpose of this study is to aid in the understanding of disruptive technologies through empirical analysis of cases selected in the computer data storage industry. Analysis results have shown that SSDs, which threaten the existence of HDDs, adhere to the conditions of being a disruptive technology as first presented by Christensen(1992). SSDs are not only technologically superior to HDDs but can be mass produced due to its applicability in a vast array of product categories made possible by their miniaturization, weight reduction, and safety. This diversity of applicable fields makes it possible for mass production leading to further decrease in the unit price ultimately continuing the diffusion of this technology. By presenting empirical cases to aid in the understanding of disruptive technology, it is determined that the findings of this study contribute greatly to both academia and the business world.

Design and fabrication of SSPA module in X-band for Radar (X-대역 레이더용 SSPA 모듈 설계 및 제작)

  • Yang, Seong-Soo
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.5
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    • pp.943-948
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    • 2018
  • In this paper, SSPA Module for X-band radar was designed and fabricated by using GaN MMIC. For the purpose of configuring the high power SSPA module, the drive steamers are composed of 2-layers of GaN MMIC with considering Gain Loss. In addition, the power divider and power combiner used a 4way approach by designing a 4-stage power amplifier. The power divider has a loss of -3.0dB or more, and the I/O has a loss of -0.2dB in the power combiner and the phase difference between the ports are good at $2^{\circ}$ on average. The fabricated SSPA module got the measurement results that satisfy a Gain 48dB, P(sat)=88.3W(49.46 dBm), PAE=30.3% or more efficiency in condition of frequency range 9~10GHz. The fabricated X-Band SSPA module can be applied in RF performance improvement for SSPA module whit improvement of power divider/combiner.