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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>
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
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.
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.
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.
자동차 냉각팬 작동에 따른 전자파 방사시험 측정에 관한 연구
김성범(Sungbum Kim),신재곤(Jaekon Shin),김성섭(Sungsub Kim),신재승(Jaesueng Shin) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
By domestic regulation, electromagnetic emission test is intended to measure the broadband emission generated by electrical or electronic systems fitted to the vehicle. All these systems capable of generating broadband emissions which can be switched on permanently by the driver or passenger should be in operation in normal mode. However cool ing fan could not be controlled arbitrarily by driver or passenger but operated automatically according to electronic control unit. For that reason the research was conducted to compare fan running and no operating of fan. We can find the maximum 30 ㏈ difference at any frequencies. As a result of this test, we can reflect that this research is to be used reference guide for test condition.
하이브리드 자동차의 광대역 전자파방사 측정방법에 관한 연구
김성범(Sungbum Kim),신재곤(Jaekon Shin),김성섭(Sungsub Kim),류기해(Gihae Ryu),김해성(Haesung Kim),신재승(Jaesueng Shin) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Automobile hybrid systems combine two motive power sources, such as an internal combustion and electric motor achieving different functions through different power combinations. Hybrid systems possess the following three characteristics: Energy-loss reduction(idling stop), Energy recovery and reuse(charge), Motor assist. However, there is no an accurate domestic EMC regulation for Hybrid Vehicle. This research is to confirm whether the broadband emission radiated from Hybrid Vehicle can be measured following domestic regulation. We found that test conditions and methods of an internal combustion engine could not be applied due to SOC and driving mode. As a result of this test, we can expect that this research will be used by reference guide in order to revise test specification.