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Feedforward 선형화 기법을 이용한 IMT-2000용 MCPA의 설계 및 제작
노상연,정성찬,정종한,박명석,박천석 한국전자파학회 2001 한국전자파학회논문지 Vol.12 No.1
In this paper, an 1-Watt amplifier for IMT-2000 was designed and fabricated using feedfarward method which has the highest linearity and wide bandwidth. Since feedforward is sensitive to surroundings for example heat, input power level, time and so on, adaptive controller using micro controller is adopted. We fabricated a HPA with 35 dB gain, 40 dBm of 1-dB compression point, and utilized variable attenuator and variable phase shifter using reflection type to cancel loop signal. From the measured results, the fo11owing facts were obtained, in signal loop, main carrier over 35 dB was suppressed and error signal over 30 dB is cancelled in error loop, IMD characteristics above 60 dBc were obtained. 본 논문에서는 선형화 특성이 우수하고, 대역폭이 넓은 feedforward 선형화 기법을 이용하여 IMT-2000용 1-Watt 급 증폭기를 설계 제작하였다. Feedforward는 외부환경(온도, 입력 전력 레벨, 시간 등)의 변화에 민감하므로 마이크로컨트롤러를 이용하여 이를 제어하였다. 35dB 의 이득과 40dBm의 최고전력을 갖는 주증폭기를 설계하였고, 각 루프의 신호를 상쇄하기 위해서 반사형 가변감쇄기와 위상변화기를 사용하였다. 2.11 2.17GHz 대역에서 측정 결과 신호루프에서 주신호를 35dB이상 상쇄하였으며, 오차루프에서 30dB 이상 오차신호를 상쇄하여 60dBc 이상의 선형화 특성을 얻을 수 있었다.
단지별 거주자의 요구 및 입지특성에 따른 복지 서비스 유형 적용에 관한 연구
노상연,윤영호,조영태,이지은,조용경,Roh, Sang-Youn,Yoon, Young-Ho,Cho, Young-Tae,Lee, Ji-Eun,Cho, Yong-Kyung 한국토지주택공사 토지주택연구원 2012 LHI journal of land, housing, and urban affairs Vol.3 No.2
서민의 주거 안정을 위해 1980년대 후반 공급된 영구임대주택단지는 20여년이 흐르면서 새로 공급된 단지 거주자와의 형평성 문제가 야기되고 있으며 기존 거주자를 위한 복지서비스를 개선해야 한다는 요구에 직면해 있다. 이를 반영하여 본 연구는 복지서비스 유형을 살펴보고 단지의 입지특성과 거주자 계층의 인구특성을 기준으로 단지에 적용 가능한 복지서비스 유형들을 검토하고 거주자의 복지요구와 비교하여 향후 단지별 복지정책을 위한 기초자료로 활용하는데 그 의의를 둔다. 이를 위하여 복지서비스, 거주자 계층 그리고 입지특성에 관한 이론을 고찰함으로서 복지서비스의 범위와 유형기준을 마련하였다. 그리고 이를 토대로 거주자 대상에 따라 복지서비스를 강화하기 위한 7가지 유형(자립형, 반자립형, 육아형, 청소년형, 자활형, 사회통합형, 1인가구형)을 설정하였다. 복지서비스 요구분석에서는 관리 전문가와 입주자 대표를 대상으로 설문조사를 통해 단지 별 요구분야를 파악하고 이를 바탕으로 개별 단지를 분류하였다. 그 다음으로 단지별 입지특성과 거주자 계층의 인구특성을 바탕으로 복지서비스 유형을 세분화하여 적용하고 단지 별 요구도와 비교하였다. 전반적으로 영구임대주택의 인구특성은 고령화되었음을 확인할 수 있었으나, 유아비율과 청소년 비율이 높게 나타난 단지의 경우 보육형과 청소년형을 적용할 수 있었다. 분석결과, 영구임대주택의 복지서비스 유형은 서울시와 대도시의 대규모 단지일수록 자립형, 청소년형, 1인가구형의 비율이 높게 나타났으며, 소도시의 소규모 단지일수록 반자립형과 육아형의 적용비율이 높게 나타났다. Within twenty years, Permanent Affordable Housing provided for people's security of housing in late 1980's yields the principles of equity with tenant's in new one supplied, thus being confronted by the requirements that existing welfare service for tenants should be improved. Reflecting on these, this study means to prepare the basic data for the welfare policy as applying welfare service types on basis of housing locational characteristics, tenants tier compared with welfare service needs of permanent affordable housing tenants. For achieving this aim, the range and mixed use mechanism of welfare service are investigated as reviewing the related research and findings. Based on this investigation, 7 types of welfare service(Independence, Half-support, Child care, Juvenile, Self-support, Social-mix, and Single household) are established. On the analysis of survey, the welfare service needs are investigated as grouping with locational characteristics and survey target. In addition, the welfare service types are reorganized by analysis of tenant's demographic and locational characteristic on each housing and are compared with tenants needs. Although, the demographic of permanent affordable housing generally shows that the tenants are constituted with aged people, the housing with high ratio of children and juvenile can be applied with Child Care type and Juvenile type. As a result of comparison, the ratio of independence type, juvenile type, and single household type are more on the large housing and housing on metropolitan area, and the ratio of half-support type and child care type are more on the small housing and housing on small city area.
InGaP/GaAs HBT를 이용한 900 MHz 대역1 W급 고선형 전력 증폭기 MMIC 설계
주소연(Soyeon Joo),한수연(Suyeon Han),송민건(Mingeun Song),김형철(Hyungchul Kim),김민수(Minsu Kim),노상연(Sangyoun Noh),유형모(Hyungmo Yoo),양영구(Youngoo Yang) 한국전자파학회 2011 한국전자파학회논문지 Vol.22 No.9
본 논문에서는 InGaP/GaAs hetero-junction bipolar transistor(HBT)를 이용하여 900 MHz에서 동작하는 1 W급선형 전력 증폭기를 설계 및 검증하였다. 온도 변화에 따른 증폭기의 특성 변화를 최소화하기 위해 능동 바이어스 회로를 구성하였다. 전류 붕괴(current collapse)와 열 폭주(thermal runaway)를 방지하기 위하여 ballast 저항을 삽입하여 전력 증폭기의 성능 및 신뢰성을 최적화하였다. 제작된 선형 전력 증폭기는 중심 주파수 900 MHz의 one-tone 신호를 사용하였을 때, 17.6 dB의 전력 이득과 30 dBm의 OP1dB를 가지며, 이때 44.9 %의 PAE를 갖는다. 또한, two-tone 신호를 인가하였을 때, 20 dBm의 평균 출력 전력에서 47.3 dBm의 매우 높은 OIP3를 갖는다. This paper presents a highly linear power amplifier MMIC, having an output power level of about 1 watt, based on InGaP/GaAs hetero-junction bipolar transistor(HBT) technology for the 900 MHz band. The active bias circuit is applied to minimize the effect of temperature variation. Ballast resistors are optimized to prevent a current collapse and a thermal runaway. The fabricated power amplifier exhibited a gain of 17.6 dB, an output P1dB of 30 dBm, and a PAE of 44.9 % at an output P1dB from the one-tone excitation. It also showed a very high OIP3 of 47.3 dBm at an average output power of 20 dBm from the two-tone excitation.
BPR 방법론 기반 중소 PCB 제조 기업의 맞춤형 제조실행시스템 구축
김건연(Gun Yeon Kim),이언(Eon Lee),김종환(Jong Hwan Kim),강형석(Hyung Suk Kang),노상도(Sang Do Noh),이재광(Jae Kwang Lee),최상수(Sang Su Choi),조용주(Jong Ju Cho),최석우(Seog Ou Choi) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Manufacturing enterprises have been doing their best endeavors to obtain global competitiveness using various methodologies, such as IT technology. In order to achieve global competitiveness, they are adopting Manufacturing Execution System (MES) for competitive production. MES is a total management system that manages from the beginning of the production by product order until the quality inspection of the finished product. And MES is an inter-mediator for supplementation of information gap between ERP and inspection machine and equipment. This paper describes on establishment of effective strategy based on BPR methodology and implementation of MES small and medium PCB manufacturing company with multiple-types of products and mixed process flows.
노상도(Sang Do Noh),김건연(Gun Yeon Kim),박태근(Tae Keun Park),박영진(Young-jin Park),황인걸(In Gurl Hwang),정경훈(Kyung Hoon Chung) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Digital Manufacturing is a technology to facilitate effective product developments and agile productions by digital environments representing the physical and logical schema and the behavior of real manufacturing systems including manufacturing resources, environments and products. A digital factory as a well-designed and integrated environment is essential for successful applications of this technology. In this research, we constructed a sophisticated digital factory of an automotive company's general assembly shop by measuring and modeling through the parametric 3-D CAD. It is expected that this digital general assembly shop is useful for achieving great time and cost savings in many manufacturing preparation and planning activities for new car developments, such as a process/operation planning, a production and material flow analysis, a manufacturability analysis based on ergonomics, etc.
BPR 방법론에 기반한 중소 PCB 제조업체의 MES 구축 전략과 효과분석
김건연,진유의,노상도,최상수,조용주,최석우 대한산업공학회 2011 산업공학 Vol.24 No.3
Manufacturing enterprises have been doing their best endeavors to obtain competitiveness using various methodologies, such as information technology. In order to achieve competitiveness, they are adopting manufacturing execution system (MES). MES is a total management system that manages from the beginning of the production by product order until the quality inspection of the finished product. And MES is an inter-mediator for supplementation of information gap between ERP and inspection machine and equipment. This paper describes on establishment of effective strategy based on BPR methodology and implementation of MES small and medium PCB manufacturing company with multiple-types of products and mixed process flows. And then we proposed evaluation model based on balanced score card (BSC) for considering non-finance elements as well as finance elements. With evaluation model, we analyzed benefits and effects of MES.
김건연(Gun Yeon Kim),윤태혁,김유석(Yoo Seok Kim),이주연(Joo Yeon Lee),노상도(Sang Do Noh),박영진(Young-jin Park),김동욱(Dong Wook Kim),정경훈(Kyung Hoon Jung) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To achieve rapid new car developments and cost saving, new approaches for automotive general assembly in manufacturing preparations are needed. In this paper, CAD and DMU technologies for design and evaluation of machines and equipments are discussed. Digital Mock-up based on 3-D CAD models usually apply in the area of concept design and design review. We focus on manufacturing preparations of machine and equipment in this paper, and suggest procedure, some examples and considerations of DMU. By applying DMU in the manufacturing preparations of general assembly, time, cost and quality of engineering can be reduced by achieving engineering collaborations.
디지털 가상생산 기술 적용 전략 수립을 위한 자동차 업무 분석
김건연(Gun Yeon Kim),윤태혁(Tae Hyuk Yoon),노상도(Sang Do Noh) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Digital virtual manufacturing is a technology facilitating effective development and agile manufacturing of products via sophisticated computer models representing physical and logical schema and behavior of real manufacturing systems including products, process, and manufacturing resources. Based on these models, digital virtual manufacturing supports decision making and error checking in the entire manufacturing processes from design to mass production. In this paper, we analyzed entire business process of the tour major production shops such as press. body assembly, painting and general assembly, of a Korean automotive company by IDEF methodology. And then we generated a strategic plan for the systematic application of the virtual manufacturing technologies. We identified many activities in business process, that can be improved by the application of virtual manufacturing technologies.