Design of a band-stop UWB antenna with two L-shaped stubs

Shin, Jaekon,Hong, Seokjin,Choi, Jaehoon Wiley Subscription Services, Inc., A Wiley Company 2009 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.51 No.11

<P>In this article, a novel ultra-wideband (UWB) antenna with band-stop characteristic is proposed. The UWB characteristic of the proposed antenna is achieved by adopting two spiral elements. By attaching two L-shaped stubs along the microstrip feed line, the band-stop performance can be achieved. The designed antenna has a small size and operates across the frequency range from 3.17 to over 11 GHz to meet a 10-dB return loss requirement while providing band-stop performance in the frequency band from 5.14 to 5.96 GHz. Measured results reveal that the proposed antenna has good radiation performance and is suitable for UWB applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2656–2660, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24710</P>

자동차 광대역 전자파 방사시험 측정방법에 관한 연구

신재곤(Jaekon Shin),용기중(Geejoong Yong),신재승(Jaeseung Shin),김성범(Sungbum Kim),김성섭(SungSub Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The Broadband electromagnetic radiation generated by the vehicle can be measured using a vehicle-to-antenna spacing 10m or 3m, two alternative reference antenna distance are permissible 10m or 3m from the vehicle in the European Specification(EEC and ECE), but can be used only 10m method in the SAE and CISPR Specification until a recent date. Generally the difference between the limit for the radiated emissions measured at 10m antenna distance and 3m antenna distance is10dB in theory, but test result is very different according to the test vehicle and test frequency. We can find multiple antenna positions are required if the length of the vehicle is greater than 3dB bandwidth of the antenna for the 3m measurement distance

자동차 기능 안전성(ISO26262)에 관한 EMC 관리계획

신재곤(Jaekon Shin),정연춘(Yeonchoon Chung),최재훈(Jaehoon Choi) 한국전자파학회 2014 한국전자파학회논문지 Vol.25 No.10

자동차 전자 제어 장치의 확대 보급에 따라 관련 장치의 오동작으로 인해 발생하는 자동차 사고 및 인명 손실을 최소화하기 위해 ISO 26262가 제정되어 완성 차량 제작사는 물론 부품 공급사에 적용되고 있다. 이 규격에서는 자동차 전체시스템을 대상으로 개발 초기부터 생산/폐기에 이르기까지 전체 생명주기에서의 안전 요구사항을 적용토록 요구하고 있으며, 전자파 적합성 분야도 중요한 검토 항목으로 규정되어 있다. 따라서 자동차의 설계, 제조, 검증, 사용, 유지보수기간 동안 각 단계별로 적용할 EFS(EMC for Functional Safety)에 대한 개발과 연구가 절실히 필요한 실정이다. 본 논문에서는 ISO26262의 적용에 따라 EFS를 어떻게 적용할 수 있는가를 검토하였다. 이러한 검토 결과를 적용하여 자동차의 기능 안전성 확보를 위해 EFS 평가를 강제 법규화하거나 또는 신차 안전도 평가(NCAP) 항목으로 확대 적용함으로써 제작사 스스로가 안전성 확보를 위한 절차를 수행하도록 규정할 필요가 있다. ISO 26262 is applied to vehicle and electrical/electronic component manufacturers for minimizing car accidents and life damage by the extended use of electronic control equipments and their malfunctions. In this standard, safety requirements are required to be applied from the early stage of development upto manufacture and disposal stages throughout the total lifecycle of the full vehicular system, and electromagnetic compatibility must be also managed as an important consideration factor. Therefore, it is nowadays very necessary to research and develop EFS(EMC for Functional Safety) to be applied in each stage of the design, manufacture, accreditation, use, maintenance stages of cars. In this paper, how EFS can be applied for the application of ISO 26262 is described. By the enforcement of this suggestions into the legal requirement or New Car Assessment Program(NCAP) test items, it is necessary that car manufacturer have to perform some procedures for ensuring car safety by themselves.

인터넷 서비스 환경의 변화에 따른 Wi-Fi 서비스 확산 전망

김재곤(Jaekon Kim) 한국통신학회 2014 한국통신학회 학술대회논문집 Vol.2014 No.6

수소-연료전지 자동차 고전압 전기 안전성 기준에 관한 고찰

신재곤(Jaekon Shin),김성범(Sungbum Kim),안재성(Jaesung An),신재승(Jaeseung Shin),용기중(Geejoong Yong) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4

A hydrogen fuel cell vehicle was emerging as an alternative transportation means for the future automotive industry. New safety regulations should be ensured for hydrogen fuel cell vehicle due to different characteristics vehicles in power plant and fuel type. In the world forum for harmonization of the vehicle Regulations(UN/ECE WP.29) the development of the global technical regulations for hydrogen fuelcell vehicles is actively being discussed. UN/ECE WP 29 aims to develope global technical regulations in the field of environment, crashworthiness and electrical safety in the first phase till 2010. This paper explores research issues related to the electrical safety of high voltage system for Hydrogen fuel cell vehicles.

[연료·윤활유부문] LPG 엔진에 사용된 윤활유의 열화 현상 분석

류재곤(JaeKon Ryoo),권완섭(WanSeop Kwon),김성환(SungHwan Kim),문우식(WooSik Moon) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1

Recently the vehicle using LPG as fuel have been increasing due to relatively low fuel price and low tax. Although gasoline engine oils arc usually used to lubricate LPG engines. some troubles like oil thickening and TBN depletion were found in them under severe operating condition. The used oil analysis results showed the symptom of severe connecting rod bearing wear. Because the combustion heat of LPG is much higher than that of gasoline or diesel. LPG engine produces more NOx than others. The higher combustion temperature and NOx accelerates the oxidation of engine oil. In order to protect LPG engine used under severe condition. the oil that has excellent oxidation stability is needed.

CISPR25의 ALSE(Absorber-Lined Shielded Enclosure) 성능 검증 방법에 관한 연구

신재곤(Jaekon Shin),정기범(Kibum Jung),최재훈(Jaehoon Choi) 한국전자파학회 2013 한국전자파학회논문지 Vol.24 No.8

본 논문은 자동차 부품의 EMC 규격인 CISPR25의 ALSE 검증 방법에 관하여 새로운 제안을 하였다. CISPR-16은 NSA와 VSWR 방법을 이용하여 챔버 성능을 검증하도록 하고 있다. 그러나 CISPR25의 ALSE는 아직까지 챔버 검증에 관한 표준 방법이 없다. 본 논문은 이러한 관점에서 CISPR D/A JTF에서 논의가 되고 있는 롱-와이어 안테나 방식의 검증 방법을 기반으로 개선된 성능 검증 방법을 제안하고자 한다. 기존에 논의된 롱-와이어 안테나 방식은 길이 500 ㎜의 안테나를 제안했지만, 본 논문에서는 1,700 ㎜ 안테나 길이를 제안하였으며, 정합 조건에 따른 영향도 평가와 기존에 제안된 방법과 관련된 문제점 및 중요 파라미터들에 관하여 검증 및 개선 방안을 제안하였다. This paper proposes a new way to verify the performance of an absorber lined shielded enclosure(ALSE) in accordance with CISPR25, EMC standards dedicated to testing automotive components. CISPR16 requires the use of NSA and VSWR methods to test the performance of a chamber. As for CISPR25, however, there hasn’t been standardized ways to verify the performance of ALSE. This paper purports to present an improved method for the verification based on a long-wire antenna method under discussion at CISPR25 JFT. Existing discussions on a long-wire antenna method proposes that an antenna should reach 500 millimeters in length, while this paper adopts the antenna length of 1,700 millimeters. This paper also assesses the effects of matching conditions and studies problems related to methods which have been already proposed and key parameters in order to improve verification methods.

테마관광의 경험적 가치에 따른 감정반응, 지역이미지가 행동반응에 미치는 영향 연구

이재곤 ( Jaekon Lee ),이규상 ( Kyusang Lee ) 관광경영학회 2018 관광경영연구 Vol.82 No.-

A study on the Behavior response of Emotional response and Local image for the Experience value by the Theme tourism. There are 4 hypotheses based on Theme tourism reviews. Then we tested the data from questionnaires using SPSS 22.0. the data were collected for a month from January 10 to March 30. First, according to analysed result, three out of six as affective facts of The Experience value influenced on Emotional response. Second, five out of six as affective facts of The Experience value on Local image(affective image) and three out of six as affective facts of The Experience value on Local image(cognitive image) third, one out of one as affective facts of Emotional response influenced on Behavior response(Recommend intention) and one out of one as affective facts of Emotional response influenced on Behavior response(Revisit intention). Last, one out of two as affective facts of Local image influenced on Behavior response and two out of two as affective facts of Local image influenced on Behavior response(Revisit intention). As the result of this study, we will attract Theme tourists with better tourism products. It is necessary to seek and utilize it as a marketing plan through proper price and cost and A variety of infrastructure is being built and We must focus on the linkage with tourism and find solutions to improve tour product in Hwaseong-si so as not to lose sight of tourism development. Therefore, Hwaseong-si will have to try to show Differentiated theme product of Korea.

탄화수소 냉매를 사용하는 냉동기용 윤활유

류재곤(Jaekon Ryoo),박철우(Cheolwoo Park) 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.11

오존층 보호와 지구 온난화 방지를 위해 chloro fluoro carbon(CFC)냉매와 hydro fluoro carbon(HFC)냉매가 다른 냉매로 대체되었거나 대체되고 있다. 대체 냉매로 냉장고용으로는 저분자량의 탄화수소 특히 R600a 가 대두되고 있다. R600a 는 유럽과 일본에서는 이미 상용화되었으며 국내에서도 일부 상용화되어 있다. R600a 용 냉동장치의 냉동기유로는 광유를 사용할 수 있다. 종래에는 광유계 냉동기유라 하면 주로 납센계 기유를 사용하여 제조하였다 본고에서는 파라핀 함량이 높은 파라핀계 기유로 R600a 용 냉동기유를 제조하였다. 특히 광유 중의 팍스 성분을 촉매 이성화 반응을 통해 제거하여 냉동기유의 필수 요구조건인 저 유동점을 실현하였다. In order to protect the ozone layer and prevent global warming the chloro fluoro carbon(CFC) and hydro fluoro carbon(HFC) refrigerant were substituted with the alternative refrigerants. Low molecular weight hydrocarbon compound like R600a becomes to be a main refrigerant for refrigerator. The lubricants for refrigeration system using R600a as a refrigerant is developed with paraffin rich mineral oil. Usually the paraffin rich mineral oil has higher pour point. But special process such as catalytic iso dewaxing can transform the long chain wax compound into short branched hydrocarbon chain. The refrigerator oil using this paraffin rich base oil shows good performance in refrigeration system.

상업영화 제작 사례를 통한 3D Digital actor활용에 관한 접근 : 영화 <과속 스캔들> 시각효과 제작 사례 중심으로

안재곤(Ahn jaekon),이재중(Lee jaejoong),박진완(Park jinwan) 한국디지털디자인학회 2010 디지털디자인학연구 Vol.10 No.1

3D 컴퓨터 그래픽의 발전은 현대의 상업 영화 제작에 큰 변화를 가져왔다. 가상의 물체와 환경을 디자인하고 입체적으로 형상화 시켜 영상에 삽입할 수 있게 됨에 따라 제작자들은 물리적 표현의 한계를 극복 할 수 있었다. 특히 3D 디지털 액터(Digital actor)기술의 발전은 실제 배우와 스턴트맨의 역할에만 의존했던 과거 제작방식에서 벗어나 좀 더 다양하고 복잡한 씬(Scene)의 제작을 가능하게 했다. 이에 본 논문은 3D 디지털 액터를 이용한 시각효과의 케이스 스터디(Case study)논문으로 디지털 액터의 등장 배경과 역할을 서술하고 3D적용 범위에 따라 디지털 액터의 종류를 분류했다. 또한 사실적인 디지털 액터 제작을 위해 3D 스캔(Scan) SSS 쉐이더(Shader) 멀티패스 렌더링(Multi pass rendering)등 중요한 제작 기술들을 연구하여 서술하였다. 제작 사례로 영화 <과속 스캔들>에서 제작 되었던 디지털 액터컷(cut)을 프리 프로덕션 프로덕션 포스트 프로덕션 3단계로 분리하여 각 과정에서 발생한 문제점과 해결 방법 작업 결과에 대해 서술했다. 제작 사례를 토대로 효과적인 디지털 액터 제작을 위해 개선되어야 할 문제점을 분석하고 우리나라 영화 제작 상황에 맞는 개선 방향을 제시한다. The development of 3D computer graphic brought great changes to the recent production of commercial movies. As it became possible to design imaginary objects and environment and form them into three-dimensional structure and insert them into pictures the producers could overcome the limits of physical expression. Particularly the development of technology for 3D digital actors freed us from the past method of production which relied only on the roles of real actors or actresses and stuntman and enabled us to produce more various and complicated scenes. Hereupon this treatise depicted necessary technology for the role and production of digital actors as it is the case study of visual effects which use 3D digital actors. And as an example of the production divided digital actor cut produced in the movie <Scandal Makers> into 3 stages as preproduction production and postproduction and depicted the problems formed out of each stage solutions and the results of the work and suggest the problems and solutions to be improved for the effective production of the digital actors.