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

The Korea Institute of Intelligent Transport Systems (한국ITS학회)
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Design and Fabrication of A Wide-Band Dual-Polarization Stacked Patch Array Antenna for Satellite SAR Applications

위성 SAR용 광대역 이중편파 적층형 패치 배열 안테나 설계 및 제작

  • 이재민 (LIG넥스원 레이다연구소) ;
  • 유제우 (LIG넥스원 레이다연구소) ;
  • 채희덕 (LIG넥스원 레이다연구소) ;
  • 이유리 (LIG넥스원 위성체계연구소) ;
  • 정화영 (LIG넥스원 기계융합연구소) ;
  • 김종필 (LIG넥스원 위성체계연구소) ;
  • 박종국 (LIG넥스원 레이다연구소)
  • Received : 2021.03.29
  • Accepted : 2021.04.11
  • Published : 2021.04.30
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Abstract

This paper proposes a wide-band dual-polarization stacked patch array antenna for satellite SAR system applications. The array antenna was designed for loss minimization and wide-band characteristics to enhance the performance of the SAR system and optimize it for active return loss in applications to active phased arrays. The fabricated array antenna showed a performance of 19.26%/19.79% fractional bandwidth within the -10 dB reference level of the active return loss and showed loss characteristics of 0.797 dB/0.799 dB averaged within the operational frequency for both H/V-polarization cases. The pattern performance was verified by comparing the measured patterns with the calculated patterns obtained by the array factor.

본 논문에서는 위성 SAR 시스템에 적용하기 위한 광대역 이중편파 적층형 패치 안테나를 설계하고 제작 결과를 제시하였다. 위성 SAR 분야에 주로 적용되는 X-대역에서 위성 SAR 시스템의 영상 품질 향상을 위해 손실 최소화, 광대역 동작 그리고 능동위상배열안테나에 적용이 가능하도록 능동반사손실 최소화 관점에서 안테나를 설계하였다. 제작된 안테나의 대역폭은 능동반사손실 -10 dB 이하 기준에서, 수직/수평 편파 각각 19.26%/19.79% 이며, 손실은 주파수 평균으로 수직/수평 편파 각각 0.797 dB/0.799 dB 로 확인되었다. 또한, 근접전계시험으로 안테나의 빔 패턴을 확인하다. 그 결과, 배열이론을 바탕으로 계산된 이상적 패턴과 비교하여, 측정된 패턴 및 지향성이 매우 유사함을 확인하였다.

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References

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