一种用于无线传感网络的微小型平面天线

A novel design of metamaterial-based miniatured planar antenna applied in WSN

针对多频天线结构复杂、尺寸较大的问题,采用圆形三开口谐振环超材料结构作为辐射贴片,设计了新型的适用于无线传感网络的微小型平面天线.研究了辐射贴片上的缝隙的尺寸、位置对频带特性的影响,优化后的天线尺寸仅为22.5mm×18mm×1.6mm,其电尺寸为0.18λ×0.144λ×0.013λ.实测频段为2.28～2.54GHz、3.23～3.55GHz、4.97～9.75GHz,覆盖了蓝牙、ZigBee、3.4GHz的WiMax频段,以及5GHz的WLAN频段,满足无线传感网络的通信需求.这款天线相比普通平面天线,尺寸减小了45%,且具有多频带、宽频带、体积小、结构简单、易集成等优点.

In multi-band antenna,the structure is complicated and the size is large.A novel miniatured planar antenna applied in Wireless Sensor Networks is proposed,utilizing a circular tri-slit resonant ring metamaterial structure as radiating patch.The effects of the size and location of radiating patch's slots on antenna's radiating characteristics are discussed.The optimized dimension of the antenna is only 22.5×18×1.6mm3 and its electrical size is 0.18λ×0.144λ×0.013λ.The measured results indicate that the antenna can provide tri-band operations at 2.28~2.54 GHz,3.23~3.55 GHz and 4.97~9.75 GHz which cover Bluetooth/ZigBee bands and 3.4GHz WiMax band as well as 5GHz WLAN band,and meet the communication requirements of Wireless Sensor Networks.Compared with conventional planar antennas,this antenna has a size reduction of 45%,and it has many advantages,such as multi-band,broadband,small size,simple structure and easy integration.