The Journal of The Korea Institute of Intelligent Transport Systems (한국ITS학회 논문지)

The Korea Institute of Intelligent Transport Systems (한국ITS학회)
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Study on TRX Channel Amplitude and Phase Calibration Method for a Radar Wind Profiler Based on 256 Active Phased Array

256 능동위상배열 기반 연직바람 관측장비의 송수신 채널 크기 및 위상 보정 방법 연구

  • Jung, Woo-Jae (Dept. of Electronic Convergence Engineering, Kwangwoon University) ;
  • Lee, Jong-Chul (Dept. of Electronic Convergence Engineering, Kwangwoon University)
  • 정우재 (광운대학교 전자융합공학과) ;
  • 이종철 (광운대학교 전자융합공학과)
  • Received : 2022.09.27
  • Accepted : 2022.10.05
  • Published : 2022.10.31
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Abstract

In this paper, the phased-array transceiver (TRX) channel amplitude and phase calibration method for a radar wind profiler (RWP) based on the 256 active phased array is discussed. Without the additional module, the TX and RX calibration paths were secured using couplers and switches in the TRX front ends and the TRX switching duplexers, and the amplitude and phase of the 256 TRX were calibrated using a gain and phase detector. The beam widths and side lobes of five beams (vertical, east, west, south, and north) of the calibrated 256 active phased array antenna were confirmed by a near-field which agreed well with the simulation results. The proposed calibration method can be easily applied to a system based on an active phased array operated in an outdoor environment.

본 논문에서는 256 능동위상배열 기반의 연직바람 관측장비(RWP)의 송수신 채널의 크기 및 위상을 보정하는 방법등이 논의된다. 별도의 모듈 추가 없이 송수신 전단기 및 송수신 전환기에 커플러 및 스위치를 사용하여 송신 및 수신 보정 경로를 확보하였고, Gain 및 Phase Detector를 사용하여 256 송수신 채널의 크기 및 위상을 독립적으로 보정하였다. 보정된 256 능동위상배열 안테나는 근접전계 시험을 통해 5개의 빔 (연직, 동, 서, 남, 북)의 빔폭 및 사이드 로브가 시뮬레이션 계산 값과 일치함을 확인하였다. 제안된 보정방법은 실외 환경에서 운용되는 능동위상배열 기반의 시스템에 용이하게 적용이 가능하다.

Keywords

Acknowledgement

본 논문은 2021년 광운대학교 연구년 수행 결과로 이루어졌음.

References

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