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Directive Multiband Antenna Based on Rectangular Loop Array and Dumbbell-Shaped Slot Radiator.

Jose Alfredo Tirado-Mendez1,2, Hildeberto Jardon-Aguilar3, Ruben Flores-Leal3

  • 1Instituto Politécnico Nacional, SEPI, ESIME-Zacatenco, Av. IPN S/N, U.P. Adolfo Lopez Mateos, Mexico City 07738, Mexico.

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Summary
This summary is machine-generated.

This study presents a novel multiband antenna combining a rectangular loop array and a slot radiator. The design offers stable gain and radiation patterns for improved performance in various applications.

Keywords:
antenna arraydirective antennamultiband antennaresonant loopslot radiator

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Area of Science:

  • Electromagnetics and Antenna Engineering
  • Microwave and RF Engineering

Background:

  • Multiband antennas are crucial for modern wireless communication systems requiring operation across diverse frequency ranges.
  • Existing multiband antenna designs often face challenges with performance stability, radiation pattern control, and efficient excitation.

Purpose of the Study:

  • To introduce a novel antenna configuration for multiband applications.
  • To achieve stable gain, radiation pattern, and port matching across selected frequencies.
  • To overcome limitations of previously reported multiband antenna structures.

Main Methods:

  • A concentric arrangement of rectangular loop radiators excited by a dumbbell slot.
  • Independent sizing of loop radiators for desired resonant frequencies.
  • Integration of a box-shaped reflector for directive radiation and stable performance.
  • Wideband design of the exciting slot to cover upper resonance frequencies.

Main Results:

  • The proposed antenna configuration demonstrates effective multiband operation.
  • Achieved stable gain and radiation pattern shape at selected frequencies.
  • Excellent port matching was observed across the operational frequency bands.
  • The design exhibits advantages over similar configurations in the literature.

Conclusions:

  • The combination of a rectangular loop array and a slot radiator provides a robust solution for multiband antenna applications.
  • The inclusion of a reflector enhances performance characteristics, making the design suitable for demanding applications.
  • This novel structure offers a significant advancement in multiband antenna technology.