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June 3, 2026Journal of Electromagnetic Engineering and ScienceOpen Access

Beam-Switching Antenna Array Using Rotman Lens for Railway Communication at 28 GHz

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Authors

HCHyeongjun ChoJKJaehyun KimAAAshwini K. Arya

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Overview

Randomized trial shows improved beam steering for railway communications, suggesting reduced costs and enhanced performance.

Key Points

  • This research aims to develop a multibeam antenna using a Rotman lens for railway communications at 28 GHz.
  • Designed a multibeam antenna without a phase shifter for 28 GHz operations.
  • Examined beam deflection ranges from -30° to 30° for various railway scenarios.
  • Measured directivities and bandwidths under linear and circular polarizations.
  • Linearly polarized antennas achieved a maximum directivity of 10.8 dBi.
  • Circularly polarized antennas reached a maximum directivity of 11.2 dBi.
  • Antenna bandwidths were 2 GHz for linear polarization and 1.8 GHz for circular polarization.

Cite This Study

Cho et al. (2026) studied this question.

synapsesocial.com/papers/6a1fc5b7dee9eb8c0dce71f0https://doi.org/10.26866/jees.2026.3.r.363
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