Scholarlink

<p>A new modified concentric loop antenna loaded with metamaterial slotted ground plane that resonates at six distinct frequency bands is proposed in this research. The antenna comprises of a Coplanar Waveguide feed and low profile FR4 substrate with a dielectric constant of 4.4 and a thickness of about 1.6&#xa0;mm which ensures ease of fabrication and enhanced impedance matching. By effectively utilizing the exclusive features of loop antennas, specifically their magnetic dipole properties, and carefully optimising the coupling and resonant modes of the nested loops, the design achieves remarkable radiation characteristics. The Coyote Optimization Algorithm is employed to optimize the gap between the nested loops, aiming to achieve antenna miniaturization by adjusting the circumference. This optimization ensures resonance at the target frequencies of 1.12&#xa0;GHz, 1.35&#xa0;GHz, 1.61&#xa0;GHz, 2.16&#xa0;GHz, 2.71&#xa0;GHz, and 3.56&#xa0;GHz, respectively. The CST Studio Suite tool facilitated simulation, whereas the fabricated antenna is evaluated using the Agilent Vector Network Analyzer N5247A. The maximum bandwidth achieved is 160&#xa0;MHz at a frequency of 3.56&#xa0;GHz, with an average radiation efficiency of 80.88%. The proposed design is engineered for optimal performance in GSM, WLAN, LTE, and 5G NR applications, supporting frequencies up to 4&#xa0;GHz. The evaluated results demonstrate favourable multiband performance and resonance characteristics, indicating suitability for energy harvesting systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Modeling and evaluation of metamaterial inspired circularly polarized nested loop antenna for electromagnetic energy harvesting applications

  • 期刊论文

  • 发表日期：

    2026年3月13日

查看全文
  • Sathiyapriya Thangavel,
  • Sudhakar Radhakrishnan

摘要

A new modified concentric loop antenna loaded with metamaterial slotted ground plane that resonates at six distinct frequency bands is proposed in this research. The antenna comprises of a Coplanar Waveguide feed and low profile FR4 substrate with a dielectric constant of 4.4 and a thickness of about 1.6 mm which ensures ease of fabrication and enhanced impedance matching. By effectively utilizing the exclusive features of loop antennas, specifically their magnetic dipole properties, and carefully optimising the coupling and resonant modes of the nested loops, the design achieves remarkable radiation characteristics. The Coyote Optimization Algorithm is employed to optimize the gap between the nested loops, aiming to achieve antenna miniaturization by adjusting the circumference. This optimization ensures resonance at the target frequencies of 1.12 GHz, 1.35 GHz, 1.61 GHz, 2.16 GHz, 2.71 GHz, and 3.56 GHz, respectively. The CST Studio Suite tool facilitated simulation, whereas the fabricated antenna is evaluated using the Agilent Vector Network Analyzer N5247A. The maximum bandwidth achieved is 160 MHz at a frequency of 3.56 GHz, with an average radiation efficiency of 80.88%. The proposed design is engineered for optimal performance in GSM, WLAN, LTE, and 5G NR applications, supporting frequencies up to 4 GHz. The evaluated results demonstrate favourable multiband performance and resonance characteristics, indicating suitability for energy harvesting systems.