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Mass Reduction Techniques for Short Backfire Antennas: Additive Manufacturing and Structural Perforations.

Yewande Mariam Aragbaiye1, Dustin Isleifson1,2

  • 1Department of Electrical & Computer Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada.

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Summary

Researchers developed 3D-printed short backfire (SBF) antennas using additive manufacturing and perforations, achieving significant mass reductions of up to 80% with minimal performance impact.

Keywords:
3D printingFDMadditive manufacturingmetal platingperforation techniqueshort backfire antennaweight reduction

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Area of Science:

  • Electromagnetics and Antenna Engineering
  • Additive Manufacturing
  • Materials Science

Background:

  • Classical short backfire (SBF) antennas suffer from significant mass, limiting their application in weight-sensitive platforms.
  • Conventional manufacturing methods for SBF antennas are often costly and time-consuming.

Purpose of the Study:

  • To investigate novel methods for reducing the mass of SBF antennas.
  • To explore the use of additive manufacturing and structural perforations for mass reduction.
  • To evaluate the impact of these techniques on antenna performance.

Main Methods:

  • Developed 3D-printed SBF antenna structures with conductive coatings.
  • Implemented structural perforations in the 3D-printed designs.
  • Conducted parametric simulation studies to optimize designs and analyze performance.
  • Fabricated and tested antenna prototypes.

Main Results:

  • Additive manufacturing with conductive coating reduced antenna mass by 70% with no significant performance degradation.
  • Structural perforations further reduced mass to 30% and 20% of the original design (70% and 80% reduction).
  • Surface roughness and conductive paint quality were identified as key error sources.

Conclusions:

  • Additive manufacturing and structural perforations are effective techniques for significantly reducing SBF antenna mass.
  • The developed methods offer a viable solution for lightweight antenna design without compromising performance.
  • Simulation and experimental results show good agreement, validating the approach.