Design and analysis of a compact triple-band circularly polarized meta-atom and stub loaded patch antenna for Bluetooth, WLAN and X-band applications.

This paper presents a compact triple-band meta-atom stub loaded meander shaped patch antenna. A dumbbell-shaped Double Negative (DNG) meta-atom is positioned on the ground plane to enhance the performance parameters of the proposed patch antenna. This antenna possesses overall dimensions of 12 x 15 x 1.524mm3. This is designed to resonate at 2.45GHz, 5.8GHz and 8.83GHz. Miniaturization of 93% is achieved using the proposed structure. The measured impedance bandwidths of 110MHz (2.4GHz – 2.51GHz), 730MHz (5.13GHz - 5.86GHz), and 1.83GHz (7.7GHz - 9.53GHz) are observed at 2.45GHz, 5.8GHz and 8.8GHz respectively. Gains of 2.7dBi, 3.5dBc and 4.34dBi are observed at the resonant frequencies. Efficiencies of 78.1%, 83.5% and 82% are observed at the resonant frequency. Moreover, the antenna is right hand circularly polarized at 5.8GHz. This antenna is a suitable candidate for Bluetooth, WLAN and X-band applications. Simulated and measured results are in good agreement.

本文提出一款紧凑型加载超原子（meta-atom）短截线的三频段曲折形贴片天线。将哑铃形双负（Double Negative, DNG）超原子置于接地板上，以优化所提贴片天线的各项性能参数。该天线整体尺寸为12×15×1.524 mm³，设计谐振频率分别为2.45GHz、5.8GHz与8.83GHz。通过所提出的结构实现了93%的天线小型化率。实测阻抗带宽分别为：2.45GHz频点下110MHz（2.4GHz~2.51GHz）、5.8GHz频点下730MHz（5.13GHz~5.86GHz）、8.8GHz频点下1.83GHz（7.7GHz~9.53GHz）。在各谐振频点处的增益分别为2.7dBi、3.5dBc与4.34dBi，辐射效率分别为78.1%、83.5%与82%。此外，该天线在5.8GHz频点处呈现右旋圆极化特性。本天线可作为蓝牙（Bluetooth）、无线局域网（WLAN）及X波段应用的候选方案。仿真结果与实测结果吻合度良好。