A novel 2-D composite right/left-handed transmission line (CRLH-TL) metamaterial in polar coordinates is proposed for the first time, and applied to a multistandard antenna. The prototype antenna with triband operation and colocated pattern and polarization diversity is specifically designed to eliminate the need for multiple antennas in the processing center side and to significantly reduce antenna area and cost. Radial CRLH-TL waves of mode type 0 and 1 are simultaneously excited by port 1, working in the 2.5 GHz Industrial, Scientific, and Medical (ISM) band and the 3.3 GHz WiMAX band, respectively. Annular CRLH-TL waves of mode type −1 and +1 are simultaneously excited by port 2, covering the 915 MHz RFID band, and the 2.5 GHz ISM band, respectively. The 0 and 1 modes in the r -direction result in omnidirectional patterns due to the circular symmetry. The −1 mode and +1 mode in the ϕ -direction result in directional patterns, thanks to the aperture-coupled feeding topology.

中文翻译：

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基于二维CRLH-TL极坐标的多标准天线

首次提出了一种新型的极坐标中的二维复合右手/左手传输线（CRLH-TL）超材料，并将其应用于多标准天线。具有三频操作，共置方向图和极化分集的原型天线经过专门设计，以消除在处理中心侧使用多个天线的需求，并显着减少了天线面积和成本。端口1同时激发模式类型0和1的径向CRLH-TL波，分别在2.5 GHz工业，科学和医学（ISM）频带和3.3 GHz WiMAX频带中工作。模式-1和+1的环形CRLH-TL波被端口2同时激发，分别覆盖915 MHz RFID频带和2.5 GHz ISM频带。的0和1模式[R 由于圆形对称，方向性导致全向模式。-1模式和+1模式ϕ 得益于光圈耦合的进给拓扑结构，“方向”导致了方向性模式。