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提出了一种新颖的一维复合左右手传输线(CRLH-TL)单元,并将其加载到传统微带馈电的单极子天线上,设计出一种宽带的变形单极子天线。该宽带天线工作在1.67~2.67GHz,相对带宽达到了46%,有效地覆盖了DCS(Digital Cellular System,1710~1880MHz)、PCS(Personal Communication Service,1850~1990MHz)、Wi-Fi(Wireless Fldelity,2400~2480MHz)等多个通信频段。首先,利用CRLH-TL的相位补偿效应,结合传统单极子天线的自身谐振,得到多个谐振工作频点;然后,通过参数优化,使得其中的两个工作频点相互靠近形成一个更宽的工作频段,并且在工作频段内获得了较好的增益和稳定的方向图。最后,对所设计的天线进行实物加工并测试,测试结果与仿真结果吻合良好。
A novel one-dimensional composite left and right hand transmission line (CRLH-TL) unit is proposed and loaded on a traditional microstrip-fed monopole antenna to design a broadband deformed monopole antenna. The wideband antenna operates at 1.67-2.67GHz with a relative bandwidth of 46%, effectively covering a wide range of applications including DCS (Digital Cellular System, 1710-1880MHz), PCS (Personal Communication Service, 1850-1990MHz), Wi-Fi 2400 ~ 2480MHz) and other communications band. First of all, by using the phase compensation effect of CRLH-TL and combining with the self-resonance of the traditional monopole antenna, a plurality of resonant working frequency points are obtained. Then, by optimizing the parameters, two of the working frequency points are brought close to each other to form a wider Working frequency band, and obtain better gain and stable pattern in working frequency band. Finally, the designed antenna is processed and tested in-kind, and the test results are in good agreement with the simulation results.