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<p>In this paper, the effect of a single-opening split-ring resonator (SRR) structure on the performance of ultra-wideband (UWB) microstrip patch antenna (MPA) is studied. Here a UWB MPA based on partial grounding is proposed, and the SRR structure is utilized to optimize other characteristics of the low-profile microstrip antenna while ensuring the bandwidth and gain remain unchanged. The proposed metamaterial structure, consisting of a 2×2 array of SRR, is loaded on the reverse side of the substrate. The volume of the proposed antenna is 61.6 mm×67.6 mm×1.5 mm. According to simulation and experimental results, the proposed microstrip antenna loaded with 2×2 SRRs performs better than that without SRR structure. It produces an operating band of 1.62–8 GHz while achieving circular polarization characteristics with an axial ratio (<i>AR</i>) bandwidth of 3.92–4.57 GHz. In addition, the performance of the proposed antenna is superior to relevant works of literature. The antenna can be widely utilized in wireless communication systems.</p>

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An ultra-wideband circularly polarized microstrip patch antenna loaded with split-ring resonator

  • 期刊论文

  • 发表日期：

    2026年7月11日

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  • Shike Wang,
  • Dan Xia,
  • Lianrong Lyu,
  • Juan Qin,
  • Meng Wang,
  • Haiping Ren

摘要

In this paper, the effect of a single-opening split-ring resonator (SRR) structure on the performance of ultra-wideband (UWB) microstrip patch antenna (MPA) is studied. Here a UWB MPA based on partial grounding is proposed, and the SRR structure is utilized to optimize other characteristics of the low-profile microstrip antenna while ensuring the bandwidth and gain remain unchanged. The proposed metamaterial structure, consisting of a 2×2 array of SRR, is loaded on the reverse side of the substrate. The volume of the proposed antenna is 61.6 mm×67.6 mm×1.5 mm. According to simulation and experimental results, the proposed microstrip antenna loaded with 2×2 SRRs performs better than that without SRR structure. It produces an operating band of 1.62–8 GHz while achieving circular polarization characteristics with an axial ratio (AR) bandwidth of 3.92–4.57 GHz. In addition, the performance of the proposed antenna is superior to relevant works of literature. The antenna can be widely utilized in wireless communication systems.