Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on Waveguide Slotted Active Phased Array Radar Target Information Error Compensation Technique

도파관 슬롯 방식의 능동위상배열레이더 표적정보 오차보상기법 연구

  • Yoo, Dong-gil (Project 1 Team, Radar R&D Lab, LIG Nex1 Co., Ltd.) ;
  • Kim, Duck-hwan (Project 1 Team, Radar R&D Lab, LIG Nex1 Co., Ltd.) ;
  • Kim, Han-Saeng (Project 1 Team, Radar R&D Lab, LIG Nex1 Co., Ltd.) ;
  • Lee, Ki-Won (Project 1 Team, Radar R&D Lab, LIG Nex1 Co., Ltd.)
  • 유동길 (LIG넥스원(주) 감시정찰연구소 1팀) ;
  • 김덕환 (LIG넥스원(주) 감시정찰연구소 1팀) ;
  • 김한생 (LIG넥스원(주) 감시정찰연구소 1팀) ;
  • 이기원 (LIG넥스원(주) 감시정찰연구소 1팀)
  • Received : 2018.09.04
  • Accepted : 2019.01.09
  • Published : 2019.02.05
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Abstract

The waveguide slotted active phased array radar is characterized in that the beam is tilt in a specific direction when the feeding position of the antenna is not in the center of the antenna. If the beam deflection phenomenon is not properly compensated, error bias is generated in the target information collected by the radar, and the target accuracy is lowered. In this paper, we describe a technique to compensate the error of the target information that is collected in the active phased array radar of the waveguide slot type instead of the center of the antenna.

Keywords

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Fig. 1. An example of a waveguide slotted line array active phased array radar transceiver beam that performs power feeding from the antenna side

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Fig. 2. An example of Tx / Rx beam(u-v domain)

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Fig. 3. An example of azimuth / elevation angle of beem steering

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Fig. 4. Relation between azimuth, elevation and u, v, w of the antenna coordinate system

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Fig. 5. Change of azimuth by elevation angle(azimuth 8 degree steering)

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Fig. 6. Log data PPI screen(accumulated 10 scans)

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Fig. 7. Target information to be analyzed(PPI)

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Fig. 8. Target information to be analyzed(RHI)

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Fig. 9. Error compensation and target tracking simulation flowchart

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Fig. 10. Result of simulation 1(No compensationalgorithm applied)

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Fig. 11. Result of simulation 1 azimuth error analysis(No compensation algorithm applied)

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Fig. 12. Result of simulation 2(Compensation 1 applied)

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Fig. 13. Result of simulation 2 azimuth error analysis(Compensation 1 applied)

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Fig. 14. Result of simulation 3(Compensation 1 & 2 applied)

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Fig. 15. Result of simulation 3 azimuth error analysis(Compensation 1 & 2 applied)

Table 1. Tracker system information

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Table 2. Simulation information(Compensation algorithm)

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