The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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A Study on Phase Weighting of Reflectarray Antenna System for Dual-Beamforming Based on Split Beam

분할 빔 기반 이중 빔 형성을 위한 반사배열안테나 시스템의 위상 가중치에 관한 연구

  • Kyoung-Keun Kim ;
  • Seong-Min Pyo ;
  • Jin-Woo Jung (Dept. Computer Science, Dongshin University)
  • 김경근 (한국방송통신전파진흥원 정보보호팀) ;
  • 표성민 (한밭대학교 정보통신공학과) ;
  • 정진우 (동신대학교 컴퓨터학과)
  • Received : 2024.08.19
  • Accepted : 2024.10.12
  • Published : 2024.10.31
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Abstract

In this paper, a method (phase weighting) is presented to achieve high-gain radiation performance and dual-beamforming functionality based on a reflectarray antenna system. The proposed method aims to mitigate the beam overlap phenomenon by implementing split dual-beamforming, using phase weighting that induces differential electric field strength between sub-arrays. To validate the proposed method, a numerical model for analyzing the radiation characteristics of the reflectarray antenna was developed, and a comparative analysis was conducted with a conventional sub-array-based dual-beamforming method. Simulation results under various conditions confirmed that the proposed method not only improves the beam overlap phenomenon but also efficiently forms split dual beams across a range of required beam steering angles.

본 논문에서는 반사배열안테나 시스템을 기반으로 고 이득 방사성능과 원활한 이중 빔 형성 기능을 동시에 구현하기 위한 기법(위상 가중치)을 제시하였다. 제시된 기법은 부 배열 간 차 전계강도를 유도하는 위상 가중치를 적용하여 분할 빔 기반 이중 빔을 형성하는 방식으로, 빔간 중첩 현상을 개선하는 것을 목표로 한다. 제시된 기법을 검증하기 위해 반사배열안테나의 방사특성을 분석할 수 있는 수학적 모델을 제시하였고, 일반적인 부 배열 기반 이중빔 형성 기법과의 비교 분석을 수행하였다. 다양한 조건에서 모의실험 결과, 제시된 기법이 빔 중첩 현상을 개선할 할 수 있을 뿐만 아니라, 다양한 요구 빔 조향 각도에 대응하여 효율적인 이중 빔을 형성할 수 있음을 확인하였다.

Keywords

Acknowledgement

본 논문은 2022년도 정부(방위사업청)의 재원으로 국방기술진흥연구소의 지원을 받아 수행된 연구임 (21-106-A00-007, 우주계층 지능통신망 특화연구실)

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