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A 4 × 4 Active Antenna Array with Adjustable Beam Steering.

Sebastian Verho1, Van Thang Nguyen1, Jae-Young Chung1

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Summary
This summary is machine-generated.

This study presents an adjustable 4x4 antenna array that improves steering accuracy for reliable point-to-point communication. The novel calibration method ensures precise beam steering, minimizing transmission failures.

Keywords:
S-bandantenna arraybeam steeringpolarization control

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Area of Science:

  • Electrical Engineering
  • Antenna Theory
  • Wireless Communication

Background:

  • Accurate beam steering is crucial for reliable point-to-point communication systems.
  • Component variations in antenna arrays can lead to phase errors and reduced steering accuracy.
  • Existing methods may lack the precision required for critical communication links.

Purpose of the Study:

  • To develop an adjustable 4x4 antenna array with enhanced electrical beam steering accuracy.
  • To implement a calibration technique that compensates for component variations and improves steering precision.
  • To demonstrate polarization control capabilities for versatile signal transmission.

Main Methods:

  • A calibration procedure involving measurements of unit cells at various voltage bias points.
  • Calculation of an average phase shift profile model to reduce component-induced errors.
  • Post-calibration adjustment of beam steering angles in beamforming calculations.
  • Far-field measurements at 3 GHz to validate steering accuracy.

Main Results:

  • Achieved initial beam steering angles with fair accuracy at 3 GHz.
  • Improved steering accuracy to within 2 degrees by fine-tuning beamforming calculations.
  • Demonstrated incremental beam steering from 0 to 45 degrees.
  • Observed antenna gain ranging from 4.7 dB to 2.8 dB across the steering range.
  • Successfully demonstrated polarization control in horizontal and vertical directions.

Conclusions:

  • The proposed calibration and adjustment technique significantly enhances beam steering accuracy in 4x4 antenna arrays.
  • This method provides robust and precise beam steering, critical for preventing transmission failures in point-to-point communication.
  • The adjustable antenna array offers effective polarization control and reliable performance across a range of steering angles.