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<p>This paper presents a single-layer compact antenna with capability of realizing dual-sense circularly polarized (CP) radiation at two distinct frequency bands. The design employs multiple truncated-corner patches of different sizes operating in their fundamental modes, which are proximity-coupled through a probe-fed microstrip line. This configuration enables a single-layer structure, compact footprint, and flexible frequency-ratio tuning. This distinguishes the proposed design from the other related works, which are commonly multi-layer and large size due to the utilization of stack configuration or higher-order mode. Validation demonstrates that the proposed antenna exhibits dual-band operation at 5.2 and 6.5&#xa0;GHz, with the operating bandwidths of 1.6% and 1.8%. Over these bands, the broadside gain values are higher than 6.0&#xa0;dBi and peak at 6.5&#xa0;dBi.</p>

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Single-layer compact dual-band dual-circularly polarized antenna based on proximity-coupling feed patches

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月22日

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  • Hung Tran-Huy,
  • Hien Nguyen-Thi,
  • Hung Nguyen-Manh,
  • Muhammad Ikram

摘要

This paper presents a single-layer compact antenna with capability of realizing dual-sense circularly polarized (CP) radiation at two distinct frequency bands. The design employs multiple truncated-corner patches of different sizes operating in their fundamental modes, which are proximity-coupled through a probe-fed microstrip line. This configuration enables a single-layer structure, compact footprint, and flexible frequency-ratio tuning. This distinguishes the proposed design from the other related works, which are commonly multi-layer and large size due to the utilization of stack configuration or higher-order mode. Validation demonstrates that the proposed antenna exhibits dual-band operation at 5.2 and 6.5 GHz, with the operating bandwidths of 1.6% and 1.8%. Over these bands, the broadside gain values are higher than 6.0 dBi and peak at 6.5 dBi.