This article embodies the design and analysis of a novel triple‐band single‐fed circularly polarized (CP) antenna for C‐ and X‐band applications. The proposed antenna covers downlink frequency of C band (3.7‐4.2 GHz) and X band (7.25‐7.3 GHz) for satellite applications. The antenna radiator comprises of F‐shape radiating patch with 50 Ω microstrip feed line. The square strips, slit, and rectangular stub/perturbation are used on the ground plane for achieving the three CP bands. The proposed antenna has −10 dB impedance bandwidth of 50.6% (3.46‐5.71 GHz), 11.8% (6.88‐7.73 GHz), 5.02% (10.84‐11.40 GHz), and 3‐dB axial ratio bandwidth of 11.4% (4.67‐5.24 GHz), 3.02% (7.17‐7.39 GHz), and 10.16% (10.84‐11.15 GHz). The peak gain across the axial ratio bands (4.67‐5.24 GHz, 7.17‐7.39 GHz, and 10.84‐11.15 GHz) are 6.23, 2.07, and 2.11 dBi observed, respectively. The antenna is designed on FR4‐epoxy substrate with an overall volume of (0.53λ₀ × 0.53λ₀ × 0.02λ₀ mm³) at a design frequency of 5 GHz. The simulated and measured results of the proposed antenna have been validated and minor deviation (2.2%, 0.13%, and 0.02% at center frequencies of 4.6, 7.31, and 11.12 GHz, respectively) between simulated and measured results has been observed.

中文翻译：

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圆极化缺陷接地桩匹配的三频带微带天线，适用于C和X频带应用

本文体现了针对C波段和X波段应用的新型三波段单馈圆极化（CP）天线的设计和分析。拟议的天线涵盖卫星应用的C频段（3.7-4.2 GHz）和X频段（7.25-7.3 GHz）的下行链路频率。天线辐射器由F形辐射贴片和50Ω微带馈线组成。在接地平面上使用正方形带，狭缝和矩形短管/摄动来实现三个CP波段。拟议的天线的-10 dB阻抗带宽为50.6％（3.46-5.71 GHz），11.8％（6.88-7.73 GHz），5.02％（10.84-11.40 GHz）和3-dB轴向比率带宽为11.4％（4.67- 5.24 GHz），3.02％（7.17-7.39 GHz）和10.16％（10.84-11.15 GHz）。观测到的轴向比率频段（4.67-5.24 GHz，7.17-1.39 GHz和10.84-11.15 GHz）的峰值增益分别为6.23、2.07和2.11 dBi，分别。天线设计在FR4环氧树脂基板上，总体积为（0.53λ₀  ×0.53λ ₀  ×0.02λ ₀毫米³在5GHz的设计频率）。已经验证了拟议天线的仿真和测量结果，并观察到了仿真和测量结果之间的细微偏差（分别在中心频率4.6、7.31和11.12 GHz处分别为2.2％，0.13％和0.02％）。