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무선전력전송용 고지향성 Low-Profile 패치 안테나 설계
강은정(Eunjung Kang),서철헌(Cheolhun Seo),추호성(Hosung Choo) 한국전자파학회 2021 한국전자파학회논문지 Vol.32 No.10
본 논문에서는 마이크로파 방식의 무선전력전송에 적용하기 위한 고지향성 low-profile 패치 안테나를 제안하였다. 제안된 안테나는 패치안테나를 캐비티 모델 이론을 바탕으로 하여 기본모드와 고차모드를 분석하고, 지향성 수식을 이용하여 최대 지향성을 가지는 방사체 크기를 도출하였다. 또한, low-profile 특성을 얻기 위해 최적 유전 상수를 적용하여 제작 비용 및 설계 구조를 단순화한 고지향성 low-profile 패치 안테나를 설계하였다. 제안된 패치 방사체는 한 변의 길이가 0.63λ0이고, 기판의 유전율이 5.4일 때, 최대 지향성이 11.4 dBi임을 확인하였다. 측정과 시뮬레이션 전면방향이득은 5.8 GHz에서 각각 8.5 dBi, 10.1 dBi이며, 안테나의 반사계수는 각각 −12 dB, −12.7 dB임을 확인하였다. In this study, we propose a high-directivity low-profile patch antenna for microwave wireless power transmission systems. The proposed antenna is analyzed according to fundamental and higher-order modes based on the cavity theory, and high-directivity characteristics are derived with an optimum patch size using the directivity formula. To achieve low-profile characteristics, a high-directivity patch antenna is designed by applying the optimum permittivity, which can simplify the structure and lower the manufacturing cost. For a side length of 0.63λ0 and substrate permittivity of 5.4, a maximum directivity of 11.4 dBi is observed. The measured and simulated reflection coefficients are −12 dB and −12.7 dB at 5.8 GHz, respectively, and the bore-sight gains are 8.5 dBi and 10.1 dBi at 5.8 GHz, respectively.




고광욱(Kwangwook Koh),김혜숙(Hyesook Kim),김은정(Eunjung Kim),강은정(Eunjung Kang) 도시건강학회 2024 도시건강연구 Vol.3 No.2
Although Korean Healthy Cities Partnership(KHCP) was established in 2006, the first common theme ‘Making Active Living Environment’ was launched in 2016. Amid the COVID-19 pandemic, the second common theme ‘Responding Climate Change’ was subsequently launched. Using surveys and consulting with member cities, we developed vision, goal, strategies and indicators. The vision is ‘Sustainable Healthy Cities People and Planet Coexists’ and the goal is to establish climate change resilience and equitable Healthy cities system. Strategies are establishing city environments addressing climate change, enforcing resilient city health system and participatory partnership. Sustainable leading of common themes of KHCP are more urgent through capacity building of member cities especially in these critical periods to prevent climate crisis.