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신연호,강상기,Shin, Yeonho,Kang, Sanggee 한국인터넷방송통신학회 2014 한국인터넷방송통신학회 논문지 Vol.14 No.6
다양한 서비스에 대한 사용자의 욕구를 충족시키고, 주파수를 효율적으로 사용하기 위해서 여러 통신방식을 하나의 플랫폼에서 제공할 필요가 있다. 다양한 통신방식을 수용하는 광대역 무선통신시스템을 구현하기 위해서는 통신시스템 전단부에 반드시 대역가변필터를 사용해야 한다. 본 논문에는 캐비티 공진기의 구조를 갖는 800 MHz ~ 1600 MHz 범위의 대역가변필터의 구현 가능성을 확인하기 위해서 동일한 동작주파수 범위를 갖는 필터뱅크를 설계 및 제작하였다. 필터뱅크는 원하는 동작주파수 범위에서 5개의 대역통과필터로 제작하였고, 제작한 필터뱅크의 삽입손실은 최대 0.326 dB, 대역폭은 37 MHz ~ 84 MHz 그리고 감쇠특성은 대역 가장자리 ${\pm}60MHz$ 지점에서 최소 19.974 dB와 최대 37.812 dB로 측정되었다. In order to satisfy user's requirements of needs for various services and to efficiently use of frequency, a communication system using one platform can support many communication services. Tunable filters must be used in the front end of broadband communication systems which provide and support various communication methods. In this paper we design and implement a filter bank to verify the feasibility of cavity tunable filter with the operation frequency of 800 MHz ~ 1600 MHz. The filter bank is composed of five bandpass filters and each bandpass filter has the same operation frequency band of the tunable filter. The implemented filter bank has the maximum insertion loss of 0.326 dB, the bandwidth of 37 MHz ~ 84 MHz, and the attenuation of minimum 19.974dB and mximum 37.812dB at the band edge ${\pm}60MHz$ over the operating frequency band.
신연호 ( Shin Yeonho ),유용호 ( Yoo Yongho ),심재원 ( Shim Jae Won ),지광습 ( Zi Goangsoup ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
The purpose of this study is to provide the fundamental data for legal requirement for fire proofing and damage evaluation about substructures of bridge due to underbridge fire. The object of this study is an underbridge warehouse fire. Both warehouse fire simulation and Real fire experiment classified by characteristic factor of the structure was performed. With this result, fire simulation performance of analysis program and legal requirement for fire proofing was studied. A CFD program, FDS v5.0 is chosen to value the program suitable for fire simulation. To compare an experimental result with analysis result, fire experiment with unit combustibles and real structure was performed and compared accuracy of simulation result.
신연호(Shin, Yeonho),유용호(Yoo, Yongho),심재원(Shim, Jae Won),지광습(Zi, Goangsoup) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
The purpose of this study is to provide the fundamental data for legal requirement for fire proofing and damage evaluation about substructures of bridge due to underbridge fire. The object of this study is an underbridge warehouse fire. Both warehouse fire simulation and Real fire experiment classified by characteristic factor of the structure was performed. With this result, fire simulation performance of analysis program and legal requirement for fire proofing was studied. A CFD program, FDS v5.0 is chosen to value the program suitable for fire simulation. To compare an experimental result with analysis result, fire experiment with unit combustibles and real structure was performed and compared accuracy of simulation result.