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Gap waveguide slot array antenna based on a metal-only solution using additive manufacturing with multifunctional

Sergio M Feito1, Álvaro F Vaquero2, José Rico-Fernández3

  • 1Universidad de Oviedo, Gijón, 33203, Spain. menendezfsergio@uniovi.es.

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Summary
This summary is machine-generated.

This study introduces a novel metal-only antenna array for millimeter-wave (mmWave) applications. The design utilizes Groove Gap Waveguide technology to achieve four distinct radiation patterns with high efficiency.

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Antenna Theory

Background:

  • Millimeter-wave (mmWave) frequencies offer significant bandwidth for advanced communication systems.
  • Traditional antenna feeding networks can suffer from high losses and limited scalability.
  • Developing multifunctional antennas with reconfigurable radiation patterns is crucial for next-generation wireless technologies.

Purpose of the Study:

  • To present a novel, metal-only slot-type antenna array for mmWave applications.
  • To demonstrate a reconfigurable antenna capable of generating multiple radiation patterns.
  • To validate the performance of Groove Gap Waveguide technology in a complex antenna structure.

Main Methods:

  • Design and simulation of a 1x8 slot-type antenna array fed by a corporate network.
  • Implementation of the feeding network using Groove Gap Waveguide (GGW) technology.
  • Fabrication of the antenna using metal-only additive manufacturing (Laser Powder Bed Fusion).
  • Experimental validation through measurements in an anechoic chamber and planar range.

Main Results:

  • The antenna achieved over 90% efficiency.
  • Four distinct radiation patterns (sum and difference patterns) were successfully generated and validated.
  • High isolation was demonstrated for the Groove Gap Waveguide feeding network.
  • Excellent agreement between simulated and measured results for all radiation patterns.

Conclusions:

  • The proposed metal-only antenna array offers a low-loss, scalable solution for mmWave applications.
  • The Groove Gap Waveguide technology enables efficient feeding and pattern reconfigurability.
  • The antenna's ability to produce multiple radiation patterns makes it suitable for multifunctional applications.