자성유전체를 이용한 다중 안테나간 간섭 저감 효과
Analysis for Low Interference Effect between Multi-Antennas Using Magneto-Dielectric Material Sheets
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초록
최근 무선통신 기술의 발전으로 인해 이동통신 시스템은 4G LTE 시스템 상용화를 지나5G 통신시스템 연구와 개발을 진행하고 있다. 5G 통신시스템에서는 MIMO와 같은 다중안테나 시스템구조가 적용된다. 그러나 스마트폰과 같은 모바일 디바이스의 제한된 공간에 기존 셀룰러대역 안테나에 더하여 추가적으로 5G용 MIMO 다중 안테나가 실장 된다. 따라서 여러 다중안테나는 제한된 공간에서 인접하게 배치되어 서로 간섭 영향을 끼친다. 모바일 장치의 제한된 실장공간에서 안테나간의 집적도를 높이고 성능을 향상하기 위해서는 안테나간의 간섭을 저감해야 한다. 본 논문에서는 시뮬레이션을 통하여 자성유전체 시트를 이용한 안테나 간섭 저감 효과를 살펴본다.
Abstract
In 2018, the world's first 5G-based pilot service was launched at the Pyeongchang Winter Olympics, and 5G technology is expected to lead the next mobile communication technology. 5G technology requires a transmission speed between 100Mbps and 1Gbps. To meet these requirements, mmWave technology, carrier aggregation technology, and MIMO (Multi Input Multi Output) antenna technology should be applied. The products in which 5G technology will be implemented are portable mobile devices such as smart phones or smart watches. In case of 5G smartphone, the antennas for 5G frequency bands should be added in addition to the existing antennas for cellular bands. However, even if 5G band antennas are additionally applied, there is little change in the external size of the mobile device. Therefore, more antennas must be mounted in the same mounting space, so it is difficult to meet the requirements of 5G technology without increasing the degree of integration. In addition, recently introduced smart phones are designed with a metal frame chassis, which makes it difficult to secure antenna mounting space and radiation performance. Therefore, various researches have been continued to overcome the radiation performance and antenna density of the 5G smartphone. In this paper, we analyze the coupling characteristics between multiple antennas using magnetic dielectric sheets through simulations on mobile devices such as smart phones, and improve the antenna density and radiation performance through the interference reduction effect shown in the analysis results.
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