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Sungtek Kahng(강승택),Inkyu Yang(양인규),Hyeong-Seok Kim(김형석) 대한전기학회 2013 전기학회논문지 Vol.62 No.4
The spurious electromagnetic radiation is generated due to the RF unbalanced current on a conductive cable connecting an electronic device to another. A metamaterial-based filtering geometry with frequency selectivity is suggested to reduce the radiation with a bandgap structure, where the right-handed inductance and capacitance stem from the transmission-like configuration between the cable and the metal protrusion, and the left-handed components come from the narrow cavities. The effect of the structure on the unbalanced current pulse and its spurious radiation is presented in the FDTD-method frame work.
L대역 군위성 중계기 경량화를 위한 메타재질기반 소형 이중대역 3분기 전력분배기의 설계
강경석(Kyung-Seok Kahng),양인규(Inkyu Yang),장경남(Kyeong-Nam Jang),이호섭(Hosub Lee),김형종(Hyoung-Jong Kim),강승택(Sungtek Kahng) 대한전기학회 2013 전기학회논문지 Vol.62 No.12
This paper proposes a compact dual-band 3-way power divider that helps lowering the weight of a transceiver for the L-band or multi-purpose satellite communication. Instead of the multi stages or tapering which ends up with loss accumulation and size-growth, the non-linear dispersive phases from the metamaterial CRLH(composite right and left-handed) properties are obtained by the accurate formulation and implemented by the short transmission line segments. Firstly, the CRLH dual-band two-way unequal power divider and equal power divider are separately designed. And then, the input of the two-way equal power divider is plugged in the output port of the unequal one, and the entire geometry is slightly adjusted for the desirable performance. The circuit analysis and full-wave simulation are used to predict the frequency responses and validated by the measurement of the prototype. Besides, the size-reduction effect is addressed.