A compact dual-band antenna designed for operating in IEEE 802.11b/g WLAN (2.4–2.484 GHz) and ITU frequency bands (8.01–8.5 GHz) is presented in this communication. The antenna has two distinct resonant modes generated with the help of three U-shaped transmission lines and a modified ground plane. A periodic repeating pattern of metamaterial unit cells integrated on the same plane of the substrate has enhanced the antenna performances using improved loading method. The measured bandwidth of the metamaterial-embedded antenna is increased by 16% in the lower operating band and 6% in the upper operating band. The compact proposed antenna provides wide measured bandwidths of about 40% (2–3 GHz) in the lower and 16% (8.19–9.63 GHz) in the upper frequency spectra. The maximum measured gain of the proposed antenna is increased around 3.63 dB at 2.36 GHz and 1 dB at 8.45 GHz. The proposed antenna radiator is about 89.6% compact with respect to a conventional antenna. An excellent agreement of the simulation with the benchmark results validates the design of the proposed structure.

本通信介绍了一种紧凑的双频天线，设计用于在IEEE 802.11b / g WLAN（2.4-2.484 GHz）和ITU频带（8.01-8.5 GHz）中运行。该天线具有两个截然不同的谐振模式，这些谐振模式借助于三个U形传输线和一个经过修改的接地平面生成。集成在基板同一平面上的超材料单元格的周期性重复图样使用改进的加载方法增强了天线性能。嵌入超材料的天线的测量带宽在较低的工作频带中增加了16％，在较高的工作频带中增加了6％。所建议的紧凑型天线在较低的频谱中提供了大约40％（2–3 GHz）的较宽的测量带宽，在较高的频谱中提供了16％（8.19–9.63 GHz）的较宽的带宽。建议的天线的最大测量增益在2时增加了约3.63 dB。36 GHz和8.45 GHz时为1 dB。相对于常规天线，所提出的天线辐射器紧凑约89.6％。模拟与基准结果的良好一致性验证了所提出结构的设计。