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2.4GHz 무선랜 대역을 위한 Front End Module 구현
이윤상,류종인,김동수,김준철,박종대,강남기,Lee, Yun-Sang,Ryu, Jong-In,Kim, Dong-Su,Kim, Jun-Chul,Park, Jong-Dae,Kang, Nam-Kee 한국마이크로전자및패키징학회 2008 마이크로전자 및 패키징학회지 Vol.15 No.1
본 논문에서는 2.4GHz의 무선랜 대역에 사용하고 LTCC 다층 기술이 적용된 Front-end Module를 제작하였다. 제안된 FEM은 전력증폭기 IC, 스위치 IC와 LTCC 모듈로 구성하였다. LTCC 모듈은 송신단은 출력 매칭회로(matching circuit)와 저역통과필터, 수신단은 대역통과필터로 구성하였다. 출력 매칭회로를 LTCC에서 구현하기 위해 PCB에서 구현한 출력 매칭회로의 매칭 파라미터를 이용하였다. LTCC 기판의 특성은 유전율 9.0이다. 기판은 각 층의 두께가 30um인 그린시트를 총 26장을 사용하였다. 패턴용 도체는 Ag 페이스트를 사용하였다. 모듈의 크기는 $4.5mm{\times}3.2mm{\times}1.4mm$이다. 제작된 FEM은 21dB의 이득과 -31dBc(1st side lobe)와 -594Bc(2nd side lobe)의 ACPR, 그리고 23dBm의 P1dB 특성을 가짐을 확인하였다. In this paper, the front end module (FEM) was proposed for 2.4GHz WLAN band by LTCC multilayer application. The FEM was composed of power amplifier IC, switch IC, and LTCC module. LTCC module consists of output matching circuit and lowpass filter as Tx part, bandpass filter as Rx part. Design of output matching circuit for LTCC was used matching parameter from output matching circuit based on lumped circuit on the PCB board. The dielectric constant of LTCC substrate is 9. The substrate was composed of total 26 layers with each 30um thickness. Ag paste was used for the internal pattern as the conductor material. The size of the module is $4.5mm{\times}3.2mm{\times}1.4mm$. The fabricated FEM showed the gain of 21dB, ACPR of less than -31dBc first side lobe and Less than -59dBc second side lobe and the output power of 23Bm at P1dB.
이윤상,안현,이미홍,Lee, Yun Sang,Ahn, Hyeon,Lee, Mi Hong 한국토지주택공사 토지주택연구원 2019 LHI journal of land, housing, and urban affairs Vol.10 No.2
This study suggests that the system improvement priority of the Natural Conservation Zone of the Metropolitan Area Maintenance Planning Law, which was enacted for about 37 years. First of all, through the precedent research and the consultation meeting, the improvement plan was divided into the short term and the mid(or long) term. Important findings and implications are as follows. The short-term priority results were 'Improve water quality regulation', 'Strengthen individual location regulations of factories and induce multi-use plan position', and 'Improvement of waterfront area regulation', which were both critical and urgent. The mid-term(or Long-term) priority results were 'To integrate development and environmental duplication regulations', 'Abolition and unification of environmental laws', and 'Adjustment and resetting of natural conservation areas', which were both critical and urgent. On the other hand, 76.4% of the residents and 64.5% of the experts are concerned about the necessity of improvement of the Natural Conservation Zone system. Both residents and experts seem to be aware of the necessity. Opinions about Improvement and mitigation of regulations on Natural Conservation Zone that were constantly raised. In the past, there was a temporary and fragmented institutional mitigation of the government. However, with the rapid development of eco-friendly technologies since 2010, Our Country Conditions is in a transition period. This study has significant implications for the improvement and mitigation of metropolitan area regulations.
수요자 중심의 6차산업 특화단지 조성을 위한 탐색적 연구
이윤상,안현,Lee, Yun-Sang,Ahn, Hyeon 한국토지주택공사 토지주택연구원 2018 LHI journal of land, housing, and urban affairs Vol.9 No.2
Korea seems to have introduced the legal basis for supporting and revitalizing the 6th industry since about 2010. Problems such as lack of systematic support system, inadequacy of cooperation and cooperation between ministries, and poor efficiency have been raised. Also, there is a lack of information on the designation, development method, participant, and management plan of the 6th industrial complex. In this study, we review prior researches and cases related to the 6th industry and examine how to efficiently create the 6th industry-specific complex by analyzing the requirements of customers for the enterprises, residents, professionals and officials of the metropolitan area and non-metropolitan areas. As a result of the questionnaire survey, some suggestions for the establishment of the 6th industry specialization complex were drawn. First, 77.5% of the total requires a combination of public and mixed use, which can be expected to have positive effects such as sharing development gains with local residents and improving resettlement of local residents. Second, the 6th industrial complex should be harmonized with the 1st, 2nd and 3rd industries. However, unlike the standardized land use plan of existing industrial complex, it is necessary to expand the distribution and sales space to reflect the demand for tertiary industry. It is also necessary to consider measures for securing primary industrial sites or securing primary industrial sites through external procurement. Third, it is necessary to establish and operate a plan reflecting rent and rental demand after leasing for a certain period.
이윤상(Yun Sang Lee),김승덕(Seung Deok Kim),이석호(Seok Ho Lee),홍성택(Seong Taek Hong),이재웅(Jae Wung Lee),홍의연(Eui Yon Hong),김대일(Dae Il Kim) (사)한국생물환경조절학회 2015 생물환경조절학회지 Vol.24 No.3
노지 포도재배는 강우에 직접 노출되어 열과와 병 발생이 많아진다. 그래서 도입된 것이 간이 비가림 재배이지만, 이것 역시 열과와 병 발생을 예방하는 데는 한계가 있다. 따라서 간이비가림 시설의 문제점을 보완하기 위해서 완전하게 강우를 차단하면서 자연적인 환기가 가능한 비가림 시설을 개발하여 적설하중과 풍하중을 내재해 규격에 맞추었다. 개선된 비가림 시설의 특성을 검증하기 위해서 100㎡ 규모의 시설을 설치한 다음 관행 비가림 시설과 시설 내외부 온도 분포와 그에 따른 포도캠벨얼리의 품질, 갈반병 발생 및 열과율 등을 조사하여 비교하였다. 관행 비가림 시설과 개선된 비가림 시설의 온도 조사결과 외기온이 34℃ 이상일 경우 시설 내부온도가 관행 최대 40.7℃, 개선 시설은 37.4℃로 측정되어 개선 시설이 3정도 낮았고, 32℃ 이하에서는 관행과 개선 시설 간에 온도 차이가 없었다. 과실 품질은 개선된 비가림 시설이 관행 비가림 시설보다 당도와 상품과율이 높았다. 개선된 비가림 시설이 관행에 비해 열과율과 갈반병 발병율이 현저히 낮았다. Fruit cracking and vine leaf spot of grapes tend to occur when the plants were directly exposed to rain under outdoor culture. Rain shelter facility can be an alternative method to prevent the cracking and disease of grape, but it also has some limitations in practical usages. We designed rain shelter facility which can completely shut out the rain and ventilate naturally, and it was upgraded to meet the standards of disaster prevention against snow and wind load. The newly developed rain shelter has two-story roof structure, and the 2nd floor roof was equipped over 1st floor roof at a distance of 40㎝. For natural ventilation and water proof, the upper roof protruded about 50㎝ from the ridge of a 1st floor roof. The various tests were carried to examine such as grape quality, brown spot and fruit cracking of Campbell Early under the conventional and the newly developed rain shelter facility which was built about 100ß?. In comparison of temperature between the conventional and the newly developed rain shelter facility when outside temperature was more than 34℃, the inside temperature was recorded as 40.7℃ and 37.4℃, respectively. There was no significant difference between the two facilities when outside was below 32℃ The quality such as soluble solids and marketable fruit was increased, and fruit cracking of grapes and vine leaf spot also drastically diminished in the newly developed rain shelter.
공동주택 변압기용량 적정성 평가를 위한 전력 이용률 분석
이윤상(Yun-Sang Lee),서정열(Jung-Youl Seo),신희상(Hee-Sang Shin),조성민(Sung-Min Sho),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
Interest in energy efficiency and savings have been rising internationally. For this reason, the domestic housing construction in the area of power equipment is being actively studied. Currently, Transformer capacity of the existing housing is designed to excessive. This is driving low utilization. Because of this, the greater the power loss and the initial installation costs. In addition, energy efficiency makes the inhibition. In this paper, evaluation of housing for the transformer capacity, the transformer utilization factor were analyzed. And appliances supply ratio was investigated.