이방성 자성유전체를 이용한 다중 안테나간 결합 저감 효과
Effects of Coupling Reduction between Multiple Antennas Using Anisotropic Magneto-Dielectric Materials
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초록
5G 통신이 일반가입자를 대상으로 상용화되었다. 5G가 적용되는 스마트폰의 경우, 고속의 멀티미디어 지원을 위한 안테나 지원 대역폭의 증가로 인해 기존의 2G/3G/4G 셀룰러 대역 안테나 외에 5G용 광대역 다중안테나가 추가 실장 되어야 한다. 그러나 기존 스마트폰의 실장공간에 안테나를 추가 배치할 수 있는 공간은 제한되어 있기에 더 많은 안테나를 탑재하기 위해서는 안테나 집적도가 증가한다. 집적된 다중 안테나의 방사성능을 개선하기 위해서는 안테나간의 결합을 저감시켜야 한다. 본 논문에서는 스마트폰과 같은 디바이스 기판의 제한된 실장공간에 집적된 다중안테나간의 간섭 저감을 위한 이방성 자성체 유전체의 효과를 사용하여 안테나 결합을 저감하고 방사성능을 개선함을 보인다.
Abstract
The world's first 5G mobile service for general subscribers was commercialized in Korea in 2019, and will be commercialized worldwide-scale after this year. As a core infrastructure for the hyper-connected society in the era of the 4th industrial revolution, 5G technology requires more than 1000 times faster transmission speed than 4G LTE. In order to satisfy these requirements, mmWave technology, carrier aggregation technology, and MIMO (Multi Input Multi Output) antenna technology should be applied. The products that 5G technology required above, will be implemented are portable mobile devices such as smart-phones or smart-watches. In case of a smart-phone to which 5G is applied, 5G broadband multi-antenna must be additionally mounted in addition to the existing 2G/3G/4G cellular band antenna for high-speed multimedia support. The 5G frequency band must be additionally implemented in the existing antenna space of a smartphone. So, the antenna integration of 5G smaart-phone increases the coupling between multiple antennas and degrades antenna radiation performance. Therefore, antennas with 5G additional frequency band must be built in the same mounting space, so that antenna density must be increased. In addition, such an increase in the degree of antenna integration increases the coupling between multiple antennas, thereby deteriorating the antenna radiation performance. Therefore, various researches are continuously studied to improve the integration and the radiation performance of the multiple antenna simultaneously. In this paper, it is studied that anisotropic magneto-dielectric materials are effective in improving the coupling reduction between multiple antennas. It is proposed a method that can be applied to 5G MIMO antenna to satisfy the performance requirements.
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