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Broadband Dual-Polarized Base Station Antenna for Fifth-Generation (5G) Applications.

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This study presents a novel broadband dual-polarized base station antenna designed for 5G mobile communications. The antenna achieves wide bandwidth, high isolation, and stable radiation patterns, making it ideal for next-generation wireless networks.

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5G antennabase station antennabroadbanddual-polarizedhigh port isolation

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Area of Science:

  • Electrical Engineering
  • Antenna Theory

Background:

  • The increasing demand for higher data rates and network capacity in mobile communications necessitates advanced antenna technologies.
  • Existing base station antennas often face limitations in bandwidth, polarization diversity, and isolation, hindering 5G performance.

Purpose of the Study:

  • To design and investigate a novel broadband dual-polarized base station antenna with enhanced performance characteristics.
  • To analyze the current distribution and feeding structures responsible for the antenna's superior performance.
  • To validate the antenna's suitability for fifth-generation (5G) mobile communication systems.

Main Methods:

  • Design and simulation of a dual-polarized base station antenna incorporating crossed dipoles and specialized feeding structures.
  • Fabrication of a prototype antenna.
  • Experimental measurement of reflection coefficient, port-to-port isolation, radiation patterns, and gain.

Main Results:

  • Achieved a broadband operation with a 46.5% bandwidth over the 3.14–5.04 GHz frequency range.
  • Demonstrated a reflection coefficient below -15 dB and port-to-port isolation exceeding 32.5 dB.
  • Obtained stable radiation patterns with half power beam widths of 71.8° ± 2.5° and a gain of approximately 8 dBi.

Conclusions:

  • The proposed antenna design effectively meets the stringent requirements for 5G mobile communications due to its wide bandwidth, high isolation, and stable radiation characteristics.
  • The specialized feeding structures and current distribution analysis provide insights into achieving broadband dual-polarization performance.
  • The fabricated prototype validates the design, confirming its potential for practical deployment in 5G base stations.