Natarajan Porchelvi, Sigamani Titus
Vivekanandha College of Technology for Women, Tiruchenkodu, India.
K.Ramakrishnan College of Engineering, Trichy, India.
Heliyon. 2024 Sep 5;10(18):e37519. doi: 10.1016/j.heliyon.2024.e37519. eCollection 2024 Sep 30.
A multi-band antenna is proposed for terrestrial applications above 5 GHz. The design includes one director element, three split ring resonators (SRR), and a printed patch antenna on a FR4 substrate to make the miniature structure. The novelty is the addition of "C" split rings and one identical stub linked to the partial ground into the radiating element, which improves impedance matching and radiation characteristics across the target bands. The prototype is designed with five distinct resonance frequencies and radiation patterns compared to those produced by the patch, the director and resonators are added. Return loss simulation results and measured radiation pattern findings are validated and analyzed. The antenna produces a gain of 7.84 dB, overall efficiency of 84.76 %, and a VSWR of 1.8 at 7 GHz frequency, which is achieved due to the peculiar features of the FR4 and it is highly suitable for traditional communication. VSWR, gain, and radiation efficiency are all higher on this antenna than they are on a typical multiband antenna. At 20 GHz, the designed antenna band is efficient to operate with five dissimilar resonant frequency bands, pinpointed at 7.224 GHz, 10.723 GHz, 13.808 GHz, 17.014 GHz and 19.549 GHz through different impedance bandwidths.
本文提出了一种适用于5GHz以上地面应用的多频段天线。该设计包括一个导向元件、三个裂环谐振器（SRR）以及一个位于FR4基板上的印刷贴片天线，以构成微型结构。其新颖之处在于在辐射元件中添加了“C”形裂环和一个与部分接地相连的相同短截线，这改善了目标频段的阻抗匹配和辐射特性。与贴片天线相比，该原型天线设计有五个不同的谐振频率和辐射方向图，同时添加了导向元件和谐振器。对回波损耗仿真结果和实测辐射方向图结果进行了验证和分析。该天线在7GHz频率下增益为7.84dB，总效率为84.76%，电压驻波比为1.8，这得益于FR4的特殊特性，使其非常适合传统通信。该天线的电压驻波比、增益和辐射效率均高于典型的多频段天线。在20GHz时，所设计的天线频段能够有效地在五个不同的谐振频段上工作，通过不同的阻抗带宽，这些频段分别位于7.224GHz、10.723GHz、13.808GHz、17.014GHz和19.549GHz。
