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• W2344045207 abstract "마이크로스트립 리플렉트어레이는 다수의 반사소자를 이용하여 방사패턴을 조절하는 안테나로서, 일반적으로 곡면형 반사판 안테나를 대체하기 위하여 연구되어왔다. 본 논문에서는 리플렉트어레이에 관한 간략한 설계 이론을 정리하고, 고이득 및 광대역 리플렉트어레이의 연구동향을 살펴본다. 리플렉트어레이의 이득 특성을 개선하기 위해서는 리플렉트어레이에서 구현되는 반사위상의 오차를 최소화해야 하는데, 이를 위해서는 충분히 넓은 반사위상 범위 및 낮은 반사위상 민감도를 얻어야 한다. 리플렉트어레이의 대역폭을 확장하기 위해서는 반사소자의 반사위상이 주파수에 대해 선형적인 특성을 가지도록 설계해야 한다. 본 논문에서는 적층형 구조, 단층 다중공진 구조 등, 고이득 및 광대역 리플렉트어레이를 위해 반사소자의 반사위상 특성을 개선하고자 하는 다양한 연구에 대해 살펴본다. 또한, 안테나를 보다 소형화하기 위해 리플렉트어레이를 이중 반사판 형태로 구현하는 연구를 소개하고, 마지막으로 Contoured 빔, 근거리 빔 집중, RCS 감소 등 다양한 리플렉트어레이 적용 사례에 대해 정리한다. Microstrip reflectarray is an antenna which controls its radiation pattern with a number of reflective elements. Conventionally, the reflectarray has been researched to replace curved reflector antennas. In this paper, design theories of reflectarray is briefly introduced, and research trends of high gain and broadband reflectarrays are reviewed. To improve the gain of the reflectarrays, it is required that the reflection phase errors on the reflectarray surface be minimized. For this purpose, sufficiently wide reflection phase range and low phase sensitivity should be realized with the designed element. For bandwidth improvement, the reflection phase of the element should be linear with the frequency variation. In this paper, various researches to improve the reflection phase characteristics of the element for high gain and broadband reflectarrays, such as multi-layer and single-layer multi-resonant structures, are reviewed. Also, dual-reflectarray configuration for compact antenna design is reviewed. Finally, various applications of reflectarrays such as contoured beam, near-field focusing, and RCS reduction are reviewed." @default.
• W2344045207 created "2016-06-24" @default.
• W2344045207 creator A5032316721 @default.
• W2344045207 date "2015-11-30" @default.
• W2344045207 modified "2023-09-25" @default.
• W2344045207 title "Researches on Microstrip Reflectarray Antennas" @default.
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• W2344045207 doi "https://doi.org/10.5515/kjkiees.2015.26.11.937" @default.
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