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Coplanar Meta-Surface-Based Substrate-Integrated Waveguide Antennas with Broadband and Low Reflections for K-Band

Chunli Wang1, Dongxing Gao1, Likai Liang1

  • 1School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai 264209, China.

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|September 9, 2022
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Summary

Novel substrate-integrated waveguide (SIW) antennas utilize meta-surfaces for K-band beam scanning. These designs offer improved gain and bandwidth for millimeter-wave applications.

Keywords:
beam scanningbroadbandmeta-surfacemm-Wave antennassubstrate-integrated waveguide (SIW)

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Area of Science:

  • Electromagnetics and Microwave Engineering
  • Antenna Theory and Design
  • Metamaterials and Metasurfaces

Background:

  • Traditional substrate-integrated waveguide (SIW) antennas face limitations in beam scanning capabilities.
  • Achieving wide bandwidth and low reflection simultaneously in SIW structures remains a challenge.
  • The integration of complementary split-ring resonators (CSRRs) offers potential for advanced antenna performance.

Purpose of the Study:

  • To propose novel SIW antennas with K-band beam scanning capabilities.
  • To investigate the use of coplanar meta-surfaces (rhombus, hexagon, trapezoid) for enhanced antenna performance.
  • To explore mixed meta-surface configurations for flexible control over reflection and bandwidth.

Main Methods:

  • Design and simulation of four novel SIW antennas incorporating rhombus, hexagon, and trapezoid meta-surfaces.
  • Analysis using equivalent circuit models and extraction of effective medium parameters.
  • Numerical and experimental verification of antenna bandwidths and radiation characteristics.

Main Results:

  • Maximum antenna gains ranging from 17.0 dBi to 18.8 dBi.
  • Relative bandwidths achieved between 10.74% and 19.42%.
  • Maximum simulated radiation and aperture efficiencies of 91.20% and 61.12%, respectively.

Conclusions:

  • The proposed meta-surface integrated SIW antennas enable efficient K-band beam scanning.
  • The flexible design approach allows for selectable tuning of electromagnetic fields.
  • This technology is suitable for developing high-performance mm-Wave antennas and sensors on PCB platforms.