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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
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Monopole Antenna with Enhanced Bandwidth and Stable Radiation Patterns Using Metasurface and Cross-Ground Structure.

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  • 1Department of Electronics Engineering, Hanbat National University, Daejeon 34158, Korea.

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Summary

A novel printed monopole antenna offers stable omnidirectional patterns for marine IoT and ocean buoys. Its unique design achieves a wide impedance bandwidth and high gain, validated by prototype measurements.

Keywords:
cross-groundfrequency-selective surface (FSS)monopole antennaocean buoyomnidirectionalradiation pattern flatnesswideband

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Area of Science:

  • Electromagnetics and Antenna Engineering
  • Wireless Communication Systems
  • Marine Technology

Background:

  • Traditional monopole antennas face limitations in bandwidth and radiation pattern stability for marine applications.
  • The Internet of Things (IoT) in marine environments requires robust and efficient wireless communication solutions.
  • Ocean buoys and maritime IoT devices necessitate antennas with reliable omnidirectional radiation patterns.

Purpose of the Study:

  • To design and validate a printed monopole antenna with stable omnidirectional radiation patterns for marine IoT and ocean buoy applications.
  • To enhance impedance bandwidth and antenna gain using a cross-ground structure and frequency-selective surfaces (FSS).
  • To achieve improved performance metrics compared to conventional monopole antennas.

Main Methods:

  • A printed monopole antenna incorporating a rectangular patch, a cross-ground structure, and two FSS unit cells was designed.
  • Electromagnetic simulations were performed to analyze antenna characteristics.
  • A prototype was fabricated and measured to validate the simulated results.

Main Results:

  • The proposed antenna achieved a wide impedance bandwidth of 83.2% (1.65 to 4 GHz).
  • A peak gain of 4.57 dBi and a total efficiency of 97% at 1.8 GHz were realized.
  • Simulated and measured results showed good agreement, confirming the antenna's performance.

Conclusions:

  • The developed printed monopole antenna with a cross-ground structure and FSS unit cells demonstrates superior performance for marine IoT and ocean buoy applications.
  • The antenna design successfully provides stable omnidirectional radiation patterns and enhanced bandwidth.
  • The validated prototype confirms the effectiveness of the proposed structure for reliable maritime wireless communication.