Near-Field Rx-Measurement for Active Phased Array of Digital Radar Using Calibration Path

보정 경로를 활용한 디지털 레이더의 능동 위상 배열 근접전계 수신시험

  • Received : 2016.04.18
  • Accepted : 2016.06.16
  • Published : 2016.07.07


In this paper, the method is proposed that the equivalent result can be obtained by compensating the variation of gain and phase in the comparison with the result of near-field measurement which is obtained in the steady state, although the gain and phase variation of rx-channels occurred in the near-field rx-measurement of digital active phased array antenna. The proposed concept has the time section for monitoring the state of the rx-channels through the calibration path in the measurement timeline, and is the method for compensating the variation of state. For validating the proposed method, the fabricated X-band digital active phased array antenna and the planar near-field measurement facility is utilized. The proposed method is validated in the comparison with the compensated pattern which the unstable state of rx-channels is calibrated and the reference pattern obtained under the steady state of the rx-channels.


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