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Wide-Angle Scanning Phased Array Antenna using High Gain Pattern Reconfigurable Antenna Elements.

ByungKuon Ahn1, In-June Hwang2, Kwang-Seok Kim1

  • 1Korea Advanced Institute of Science and Technology (KAIST), School of Electrical Engineering, Daejeon, 34141, South Korea.

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Summary

This study introduces pattern reconfigurable antenna (PRA) elements for wide-angle scanning phased array antennas. These elements enable beam steering up to ±70° even with large element spacing, enhancing antenna performance.

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Area of Science:

  • Electrical Engineering
  • Antenna Theory and Design

Background:

  • Wide-angle scanning phased array antennas are crucial for advanced applications.
  • Achieving wide-angle scanning with large element spacing presents significant challenges.

Purpose of the Study:

  • To develop a design guideline for pattern reconfigurable antenna (PRA) elements for wide-angle scanning phased array antennas.
  • To demonstrate the effectiveness of PRA elements in achieving wide-angle scanning performance.

Main Methods:

  • Analysis of PRA element characteristics (switching modes, tilt angle, HPBW) for target scanning ranges.
  • Design and fabrication of an 8x1 array antenna using a high-gain PRA element with three reconfigurable patterns.
  • Measurement of the fabricated array antenna's scanning performance.

Main Results:

  • A design guideline for PRA elements was established based on scanning range and element spacing.
  • The fabricated 8x1 array antenna achieved a beam scanning range of ±70°.
  • The study confirmed that PRA elements designed under the guideline enable wide-angle scanning even with large element spacing (0.9 λ₀).

Conclusions:

  • Pattern reconfigurable antenna elements are a viable solution for wide-angle scanning phased array antennas.
  • The proposed design guideline facilitates the development of high-performance phased array antennas with enhanced scanning capabilities.