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This work provides a unique low mutual coupling ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna that is small, good performing, and has a unique design. To reduce the way that antenna elements in a microstrip antenna interact with one another array, a stepped Jesus cross stub was developed. The recommended antenna’s operational bandwidth is 1.1–20 GHz. A unique method using strategically placed stepped Jesus cross sign stubs inside the patches is suggested to address mutual coupling issues. Throughout the intended frequency, the precise positioning and size of these stubs produce amazing isolation below − 20 dB, and at 5.8 GHz, we suppressed 12 dB isolation in the proposal. The system is built on an easily accessible and reasonably priced FR-4 substrate and dimensions of the design are 50 × 30 × 1.6 mm3, showcasing the effectiveness of the proposed work. This approach achieves mutual coupling suppression with the need for external decoupling structures, representing a significant advancement in compact UWB-MIMO antenna design. The high-frequency structure simulator (HFSS) has validated the compact design. The suggested antenna may be utilized in various UWB applications, according to its compacted dimensions and strong performance indicators.

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Mutual Coupling Reduction in UWB-MIMO Antennas Using Stepped Jesus Cross Stub

  • 会议论文

  • 发表日期：

    2026年

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  • R. Arivarasu,
  • Subbarao Genikala,
  • Srinivasarao Alluri,
  • Bhanuprasad Eppe,
  • S. Rajasekaran,
  • V. Kumar

摘要

This work provides a unique low mutual coupling ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna that is small, good performing, and has a unique design. To reduce the way that antenna elements in a microstrip antenna interact with one another array, a stepped Jesus cross stub was developed. The recommended antenna’s operational bandwidth is 1.1–20 GHz. A unique method using strategically placed stepped Jesus cross sign stubs inside the patches is suggested to address mutual coupling issues. Throughout the intended frequency, the precise positioning and size of these stubs produce amazing isolation below − 20 dB, and at 5.8 GHz, we suppressed 12 dB isolation in the proposal. The system is built on an easily accessible and reasonably priced FR-4 substrate and dimensions of the design are 50 × 30 × 1.6 mm3, showcasing the effectiveness of the proposed work. This approach achieves mutual coupling suppression with the need for external decoupling structures, representing a significant advancement in compact UWB-MIMO antenna design. The high-frequency structure simulator (HFSS) has validated the compact design. The suggested antenna may be utilized in various UWB applications, according to its compacted dimensions and strong performance indicators.