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최근령(GeunRyoung Choi),최승호(Seung-Ho Choi),이국주(Kook Joo Lee),김문일(Moonil Kim),김도원(Dowon Kim),정동윤(Dong Yun Jung) 한국전자파학회 2013 한국전자파학회논문지 Vol.24 No.6
본 논문에서는 CMOS 공정을 사용한 밀리미터파 대역 온-칩 다이폴 안테나의 최적화된 설계를 제안한다. CMOS 공정을 사용한 안테나에서 가장 큰 단점은 기판의 높은 유전율과 손실로 인하여 공기 중 방사 효율이 낮다는 것이다. 이를 극복하기 위한 방법으로 공기 중의 방사 영역 증가와 안테나와 반사체의 거리 최적화가 필요하다. 80 ㎓에서 16.5 %의 효율과 22.3 %의 대역폭을 가지는 다이폴 안테나의 최종 설계에서 공기 중 방사 영역을 넓히기 위한 방법으로 기판 각도, 칩 가장자리-다이폴 사이 거리를 변화시켰으며, 안테나와 반사체사이의 거리를 최적화하기 위한 방법으로 기판 두께와 안테나-접지면 사이 거리를 조절하며, 설계 환경이 안테나의 효율에 미치는 영향을 체계적으로 분석하였다. This paper presents an optimized design of a millimeter-wave on-chip dipole antenna using CMOS process. The serious flaw of the antenna using CMOS process is low radiation efficiency because of high permittivity and conductivity. To overcome the weakness, we need to widen radiation area in air and optimize distance between an antenna and a reflector. The radiation efficiency and bandwidth of the designed antenna are respectively 16.5 % and 22.3 % at 80 ㎓. Systematic methods are attempt to analyze an effect on the antenna radiation efficiency. To widen radiation area in air, substrate cut angle and distance between the antenna and chip edge are adjusted. In addition, to optimize distance between an antenna and reflector, substrate thickness and distance between the antenna and a circuit ground plane are adjusted.
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김범수,Alivia Kirana Hartono Putri,Krishna Sahithi Karur,최근령,김상호 대한인간공학회 2024 大韓人間工學會誌 Vol.43 No.1
Objective: This study identifies the critical ergonomic requirements and their hierarchical structures that need to be addressed during the evolution from traditional industrial robots to collaborative robots. It also delves into how the relative importance of each user requirement changes with the evolution of technology. Background: User-centered design is becoming increasingly crucial as technological advancements enable industrial robot systems to perform diverse and complex interactions. Therefore, it is necessary to identify how the characteristics of user needs change as technology advances. Method: We conducted a systematic literature review, selecting 30 articles using the PRISMA method to identify ergonomic requirements. We then mapped the user requirements to quality characteristics and found the frequencies. Subsequently, we carried out Chi-square tests to determine if there were significant differences in the frequency of occurrences for the user requirements over time. Results: The literature review identified 17 user requirements. Our findings revealed that the frequency of quality characteristics mentioned related to usability and enjoyment increases with the advancement of robotics technology. However, all the hypotheses we formulated to show the relationship between the evolving importance of each user requirement and technology maturity were found to be invalid statistically. Conclusion: As the level of collaboration of industrial robots evolves, the importance of user requirements is changing. In the past, factors like functionality, performance, and safety were the primary focus, but as technology advances, user requirements related to usability and enjoyment gain greater importance. Therefore, these attributes should be integrated into the development phase for a user-centered design approach in the future of collaborative robot systems. Application: Our work provides insight to developers into the user requirements that should be considered for effective interactions between humans and collaborative robots. Through this study, we hope to see collaborative robots developed with a direction of improving the user experience and increasing overall user acceptance.
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