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2 publications

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    A Compact CPW-fed Quadruple-band-notched Antenna with Concentric Annular-rings for UWB Applications

    By Un Chol Kim, Hyon Jin Kim, Jong Yol Choe, Chol Ryong Kim, Myong Su Hong, Kwang Il Ri

    Abstract: In this paper, a compact coplanar waveguide (CPW)-fed quadruple-band-notched antenna with concentric annular-rings for ultra-wideband (UWB) applications is presented. The proposed antenna consists of four concentric annular-ring resonators, a circular shape radiating element and a CPW feed line. The quadruple band rejection is easily achieved by controlling the widths and radii of four concentric annular-ring resonators. Through the exception of four stop-bands at 3.29 to 3.7 GHz, 5.07 to 5.92 …

    Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 38–47 Read article

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    Improved TOPSIS for Al-SiC Composite Material Selection

    By Man Su Hwang, Hyon Jin Kim, Hyon Ju Song

    Abstract: This paper proposes a novel Multi-Criteria Decision-Making(MCDM) method for attaining accurate and reliable results on Al-SiC composite material selection. Many of the existing researches suggested some methods for determining weights for criteria objectively and dealt with various mathematical models for eliminating inter-criteria correlation. However, they still involve some considerable shortcomings not fitting in the reality. In this paper, in order to determine the weights of criteria, methods for both subjective …

    Published in Journal of Materials & Metallurgical Engineering · Vol. 13, Issue 3, 2023 · pp. 12–25 Read article

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