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设计了一种满足WLAN和WiMAX工作所需的小型共面波导馈电的三频带印刷单极子天线单元。该单极子天线的设计采用了在倒锥形单极天线表面开缝和在底层加载枝节的结构,使其获得了小型化和三频带的性能。采用基于共面波导的馈电方式,使天线单元具备宽带匹配、结构简单、制作方便和易与其它无线通信设备集成等优点。仿真和实测结果表明,设计的天线单元在WLAN和WiAMX应用的频段上10dB阻抗带宽分别约为610MHz(2.10～2.71GHz,约25.4%),310MHz(3.48～3.79GHz,约8.9%)和360MHz(4.96～5.32GHz,约7%),增益也都在2dB以上,而且在相应工作频点上辐射方向图全向性较好。该天线能满足WLAN和WiMAX的应用所需,具有较高的工程应用价值。
A tri-band printed monopole antenna unit designed to meet the small coplanar waveguide feed required for WLAN and WiMAX operation was designed. The design of the monopole antenna uses a structure that slits the surface of the reverse-tapered monopole antenna and loads the stanchion in the bottom layer, resulting in miniaturization and triband performance. Adopting the coplanar waveguide-based feeding mode, the antenna unit has the advantages of wideband matching, simple structure, easy manufacture and easy integration with other wireless communication devices. The simulation and experimental results show that the designed antenna elements have the 10dB bandwidth of about 610MHz (2.10 ~ 2.71GHz, about 25.4%), 310MHz (3.48 ~ 3.79GHz, about 8.9%) and 360MHz 4.96 ~ 5.32GHz, about 7%), the gain is also above 2dB, but also in the corresponding operating frequency radiation pattern omni-directional better. The antenna can meet the needs of WLAN and WiMAX applications, with high engineering value.