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Related Experiment Video

Updated: May 28, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

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Published on: April 1, 2020

Closed-Loop Iterative Self-Calibration of Initial Phase in Phased Arrays.

Xinyu Huang1, Deshun Huang1, Bingbing Chen2

  • 1School of Electronic and Information Engineering, Anhui University, Hefei 230601, China.

Sensors (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

This study introduces a rapid, closed-loop iterative method for automatic initial phase calibration in phased arrays. The novel algorithm significantly enhances beam focusing and reduces side-lobe levels for large-scale antenna systems.

Keywords:
beamformingclosed-loop iterationinitial phase calibrationphase error compensationphased array antenna

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Antenna Theory

Background:

  • Phased arrays require precise initial phase calibration for optimal performance.
  • Existing calibration methods can be time-consuming and complex, especially for large-scale systems.

Purpose of the Study:

  • To develop a fast and efficient closed-loop iterative automatic initial phase calibration scheme.
  • To improve beam focusing and side-lobe suppression in large-scale phased arrays.

Main Methods:

  • Obtaining complex readback data from all array elements with known calibration source direction and signal frequency.
  • Calculating and removing theoretical phase, then performing conjugate multiplication with a reference element to eliminate common phase errors.
  • Iteratively updating a phase compensation table using the relative phase residual for rapid automatic calibration.

Main Results:

  • Achieved digital computation time of approximately 1.6 ms for a 256-element array.
  • Demonstrated rapid convergence of the phase compensation table.
  • Improved peak response by ~14.69 dB and reduced the highest side-lobe level by ~12.72 dB.

Conclusions:

  • The proposed algorithm effectively improves beam focusing and side-lobe suppression.
  • Provides a novel implementation scheme for initial phase calibration of large-scale phased arrays.
  • Offers a significant advancement in phased array calibration efficiency and performance.