Compact dual-port CPW-fed circular ring with fractal triangle antenna for wireless communications

IF 3 Q3 Physics and Astronomy

Results in Optics Pub Date : 2025-08-26 DOI:10.1016/j.rio.2025.100887

Ketavath Kumar Naik , Sanugomula Manjula , Tathababu Addepalli , Z. Zakaria , Ahmed J.A. Al-Gburi

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Abstract

A compact dual-port CPW-fed circular ring antenna with a fractal triangle patch (DCCT) for wireless communications is presented in this paper. The antenna is implemented on an FR-4 substrate. The DCCT antenna resonates at 7.07 GHz and 9.09 GHz, exhibiting reflection coefficients of −35.15 dB and −31.83 dB, respectively. A circular ring structure with fractal slotted triangles, applied through two iterations, enables dual-band operation with enhanced reflection characteristics. The overall dimensions of the DCCT antenna are 36 × 28 mm². The observed gains at the resonant frequencies are 4.03 dBi and 5.75 dBi. The antenna achieves an impedance bandwidth of 2.98 GHz. The correlation between the dual ports is evaluated using MIMO performance metrics, including ECC, DG, CCL, TARC, and efficiency. The antenna parameters were analyzed using CST Microwave Studio and validated through measurements with a vector network analyzer. The results demonstrate that the proposed DCCT antenna is suitable for wireless communication applications.

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紧凑的双端口cpw馈电环形分形三角形天线无线通信

提出了一种用于无线通信的小型双端口分形三角形贴片cpw馈电环形天线（DCCT）。该天线在FR-4基板上实现。DCCT天线谐振频率为7.07 GHz和9.09 GHz，反射系数分别为- 35.15 dB和- 31.83 dB。分形开槽三角形的环形结构，通过两次迭代应用，使双频操作具有增强的反射特性。DCCT天线的整体尺寸为36 × 28 mm2。谐振频率下的增益分别为4.03 dBi和5.75 dBi。天线阻抗带宽达到2.98 GHz。使用MIMO性能指标评估双端口之间的相关性，包括ECC， DG， CCL， TARC和效率。利用CST Microwave Studio对天线参数进行了分析，并通过矢量网络分析仪进行了测量验证。结果表明，所设计的DCCT天线适用于无线通信应用。

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