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Related Concept Videos

Reflective Property of Parabolas01:26

Reflective Property of Parabolas

452
A parabola is a basic type of conic section that results from the intersection of a plane with a double-napped cone in a direction parallel to one of the cone's sides. This U-shaped curve has a distinctive reflective property: all incoming rays parallel to its axis of symmetry are directed toward a single point, known as the focus. This property is widely utilized in optical and communication technologies that require precise signal concentration.In analytic geometry, a parabola is defined as...
452

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A wide-angle scanning conformal phased array antenna with narrow elevation beamwidth for UAV applications.

Yang Zhou1, Yongzhong Zhu2, Changlin Li1

  • 1Department of Information and Communications, Engineering University of the People's Armed Police, Xi'an, 710086, China.

Scientific Reports
|April 3, 2026
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Summary

This study introduces a novel conformal phased array antenna for unmanned aerial vehicles (UAVs). The design offers wide bandwidth and wide-angle scanning, crucial for advanced UAV radar systems.

Keywords:
Antenna arrayArray decoupling surfaceBroadbandCircularly polarizedHigh cross-polarization discriminationSubstrate integrated waveguide

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Area of Science:

  • Electrical Engineering
  • Antenna Theory
  • Electromagnetics

Background:

  • Traditional antennas for unmanned aerial vehicles (UAVs) often face limitations in bandwidth and scanning capabilities.
  • Balun feeding in planar dipole elements can be complex and introduce inefficiencies.
  • Scanning blind spots and impedance mismatches hinder phased array antenna performance during large-angle scans.

Purpose of the Study:

  • To present a wing-conformal phased array antenna for UAV applications.
  • To achieve wide bandwidth, wide-angle scanning, and a narrow elevation beamwidth.
  • To eliminate the need for complex baluns and suppress scanning blind spots.

Main Methods:

  • A novel antenna element utilizing a dipole pair with two-wire parallel feeding, eliminating the need for a balun.
  • Integration of two matching stubs into the ground plane to mitigate impedance mismatch during large-angle scanning.
  • Loading three directors to compress elevation beamwidth and enhance gain without compromising bandwidth.

Main Results:

  • A 1x12 linear wing-conformal array prototype demonstrated a relative bandwidth of 24.8%.
  • The array maintained performance with no grating lobes even when scanned to ±65° in the azimuth plane.
  • Gain fluctuation remained below 3 dB across key frequency points, validating the design's effectiveness.

Conclusions:

  • The proposed conformal phased array antenna design is effective for UAV applications.
  • The antenna achieves wide bandwidth, wide-angle scanning, and improved gain.
  • This design shows significant potential for enhancing UAV radar systems.