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Design of a 4×4 Phased Array Antenna with High Sidelobe Charactericstic for Millimeter-Wave Band 5G Dedicated Network Services

밀리미터파 대역 5G 특화망 서비스를 위한 고부엽 특성의 4×4 위상배열안테나 설계

  • Myeong-Jun Oh (Electronics Engineering, Hanbat National University) ;
  • Jung-Ick Moon (Electronics and Telecommunications Research Institute (ETRI)) ;
  • Jung-Nam Lee (Electronics and Telecommunications Research Institute (ETRI)) ;
  • Young-Bae Jung (Electronics Engineering, Hanbat National University)
  • 오명준 ;
  • 문정익 ;
  • 이정남 ;
  • 정영배
  • Received : 2024.08.20
  • Accepted : 2024.08.23
  • Published : 2024.09.30

Abstract

This paper proposes a high-gain phased array antenna that can provide private network communication services for large office spaces, factories, and other large-scale facilities, specifically designed for millimeter-wave band 5G (5th generation) networks. The proposed antenna features a 4×4 array structure with eight sub-arrays, each consisting of a 1×2 series array. To achieve high side-lobe characteristics, an offset array structure is applied by shifting even-numbered rows by one unit, combined with power tapering to adjust the size of individual radiating elements. This design achieves a high side-lobe level (SLL) of 22.3 dB and a high gain of 18.1 dBi. Additionally, the antenna provides gain characteristics of at least 15.2 dBi and 17.4 dBi within the intended beam steering range of ±45° in the azimuth direction and ±10° in the elevation direction, ensuring smooth communication services over a wide service area.

본 논문에서는 밀리미터파 대역 5G(5th generation) 특화망을 위하여 대규모 사무공간이나 공장 등에 사설망 통신서비스를 제공할 수 있는 고이득 위상배열 안테나를 제안한다. 본 안테나는 1×2의 직렬 배열을 부배열로 8개 단자로 구성된 4×4 배열 구조를 가졌으며, 높은 부엽특성을 구현하기 위하여 개별 방사부의 크기를 조정하는 전력 테이퍼링(Tapering)과 함께 짝수 행의 배열을 1λg 만큼 이격하는 오프셋(offset) 배열구조를 적용하여 22.3 dB의 높은 부엽레벨(SLL: Side-lobe level)과 18.1 dBi의 고이득 특성을 구현하였다. 또한, 목적하는 빔 조향범위인 수평(Azimuth) 방향 ±45°, 수직(Elevation) 방향 ±10°에서 최소 15.2 dBi와 17.4 dBi의 이득특성을 구현하여, 넓은 서비스 영역 내에서 원활한 통신서비스가 제공되도록 하였다.

Keywords

Acknowledgement

This work was supported by Institute of Information & communications Technology Planning & Evaluation (IITP) grant funded by the Korea government (MSIT) (RS-2023-00216221, Development of service coverage extension technologies for 5G-Advanced mobile communications based on reconfgurable intelligent surface). This results was supported by "Regional Innovation Strategy (RIS)" through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-004).

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