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<p>This paper presents a compact integrated self-multiplexing antenna capable of operating across both the sub-6&#xa0;GHz and millimeter-wave bands of the 5G frequency spectrum. The sub-6&#xa0;GHz unit elements are alternately arranged with different structural dimensions to achieve eight distinct operating frequencies within the sub-6&#xa0;GHz spectrum. Between each pair of sub-6&#xa0;GHz unit elements, millimeter-wave unit elements of varying dimensions are incorporated to generate radiations at eight distinct frequencies in the millimeter-wave band. The first eight ports (P<sub>1</sub>–P<sub>8</sub>) operate at eight distinct frequencies of sub-6&#xa0;GHz spectrum, whereas the remaining eight ports (P<sub>9</sub>–P<sub>16</sub>) are designed to radiate at eight distinct millimeter-wave frequencies. Electromagnetic waves in the sub-6&#xa0;GHz spectrum are obtained by means of exciting TE<sub>110</sub> mode in the modified eighth-mode substrate integrated waveguide (EMSIW) cavity resonators, while millimeter-wave radiation is achieved through the hybrid TE<sub>730</sub> and TE<sub>750</sub> modes of the EMSIW cavity resonators. The inter-port isolations better than 40 dB and 20 dB are obtained across the sub-6&#xa0;GHz and millimeter-wave spectrum, respectively. This integrated placement of millimeter-wave elements efficiently utilizes the available substrate area while maintaining high inter-port isolation across the entire frequency spectrum. The design antenna system has an overall footprint of 0.425<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{\varvec{\lambda\:}}_{\varvec{g}}^{2}\)</EquationSource> </InlineEquation>, where <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:{\varvec{\lambda\:}}_{\varvec{g}}\)</EquationSource> </InlineEquation> corresponds to the guided wavelength at the lowest operating frequency. Owing to its compact dimensions, simple integrated design and excellent performance, the proposed self-multiplexing antenna emerges as a promising candidate for multiband communication systems operating in sub-6&#xa0;GHz and millimeter-wave 5G spectrum.</p>

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Compact integrated self-multiplexing antenna for sub-6 GHz and millimeter wave 5G frequency spectrum

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月16日

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  • Gunjan Srivastava,
  • Amit Kumar,
  • Sandeep Rana,
  • Vimal Kumar,
  • Akhilesh Mohan,
  • Sachin Kumar,
  • Tanweer Ali

摘要

This paper presents a compact integrated self-multiplexing antenna capable of operating across both the sub-6 GHz and millimeter-wave bands of the 5G frequency spectrum. The sub-6 GHz unit elements are alternately arranged with different structural dimensions to achieve eight distinct operating frequencies within the sub-6 GHz spectrum. Between each pair of sub-6 GHz unit elements, millimeter-wave unit elements of varying dimensions are incorporated to generate radiations at eight distinct frequencies in the millimeter-wave band. The first eight ports (P1–P8) operate at eight distinct frequencies of sub-6 GHz spectrum, whereas the remaining eight ports (P9–P16) are designed to radiate at eight distinct millimeter-wave frequencies. Electromagnetic waves in the sub-6 GHz spectrum are obtained by means of exciting TE110 mode in the modified eighth-mode substrate integrated waveguide (EMSIW) cavity resonators, while millimeter-wave radiation is achieved through the hybrid TE730 and TE750 modes of the EMSIW cavity resonators. The inter-port isolations better than 40 dB and 20 dB are obtained across the sub-6 GHz and millimeter-wave spectrum, respectively. This integrated placement of millimeter-wave elements efficiently utilizes the available substrate area while maintaining high inter-port isolation across the entire frequency spectrum. The design antenna system has an overall footprint of 0.425 \(\:{\varvec{\lambda\:}}_{\varvec{g}}^{2}\) , where \(\:{\varvec{\lambda\:}}_{\varvec{g}}\) corresponds to the guided wavelength at the lowest operating frequency. Owing to its compact dimensions, simple integrated design and excellent performance, the proposed self-multiplexing antenna emerges as a promising candidate for multiband communication systems operating in sub-6 GHz and millimeter-wave 5G spectrum.