In this article, the design of a miniaturized planar antenna using defected ground structure (DGS) and meander line structure for C and X‐band applications is presented. A novel star‐shaped and a rectangle DGS created on the ground plane of lambda/4 fed planar antenna and its effect on the size reduction performance is analyzed. Initially, a simple basic antenna (antenna‐1) operates at 14.9 GHz with a reflection coefficient (S₁₁) of −34.56 dB is designed. To achieve miniaturization of 51.27% and 36.77% an antenna is designed by DGS and meander line structure (antenna‐2), which operates at dual‐band frequencies 7.26 and 9.42 GHz with a reflection coefficient (S₁₁) of −32.91 and −22.84 dB, respectively, is presented. The suggested antenna is fabricated on a 1.6 mm thickness of FR4 Epoxy substrate to achieve a reasonable peak gain and directivity of 3.64 and 5.94 dBi at 7.26 GHz, 3.23 and 5.44 dBi at 9.42 GHz, respectively, is achieved.

中文翻译：

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使用DGS和曲折结构的小型天线在双频应用中

在本文中，提出了一种针对C和X波段应用的，使用缺陷接地结构（DGS）和曲折线结构的小型化平面天线的设计方案。分析了在λ/ 4馈电平面天线的地平面上产生的新型星形和矩形DGS及其对尺寸减小性能的影响。最初，设计了一种简单的基本天线（天线1），其工作频率为14.9 GHz，反射系数（S ₁₁）为-34.56 dB。为了实现51.27％和36.77％的小型化，DGS设计了一种天线，并设计了曲折线结构（天线2），该天线以7.26和9.42 GHz双频工作，并具有反射系数（S ₁₁分别给出了-32.91 dB和-22.84 dB）。建议的天线是在1.6 mm厚度的FR4环氧树脂基板上制造的，以实现合理的峰值增益和在7.26 GHz时分别达到3.64和5.94 dBi，在9.42 GHz时达到3.23和5.44 dBi的方向性。