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MIC와 MMIC를 위한 5-마이크로스트립 선로결합 대역통과/대역소거 여파기의 분석과 설계
박일,이혁재,진연강,Park, Yhl,Lee, Hyuck-Jae,Chin, Youn-Kang 대한전자공학회 1989 전자공학회논문지 Vol. No.
MIC와 MMIC를 위한 광대역 대역통과/대역소거 5-마이크로스트립 선로결합 구조에 대한 분석과 설계를 하고 이를 실현하였다. 전송계수에 대한 주파수 특성의 측정결과는 이론치에 근사하게 일치하고 있다. The analysis and design procedure for 5-coupled microstrip line structure for applications as a wide bandpass/bandstop filter for MIC and MMIC are presented to implement this one. The measured frequency responses for the transmission coefficient are in good agreement with the theoretical results predicted.
A Study on the Ionogram Inversion Algorithm Using Mean Value Theorem
박형래,채종석,이혁재,Park, Hyung Rae,Chae, Jong Seok,Lee, Hyuck Jae The Institute of Electronics and Information Engin 1987 전자공학회논문지 Vol.24 No.2
A description of ionogram inversion algorithm developed for obtaining ionospheric electron density profile from ionospheric sounding datas (ionograms) in real time using mean value theorem is given and the methods for determining starting points and correcting valley effects are considered. The results derived from this algorithm are compared with the theoretically simulated datas, and the real electron density profiles from the measured ionograms taken at Radio research Laboratory in Korea are given to show its practical use.