基于电磁超材料的UHF小型化短路天线设计

Design of UHF Miniaturized Shorted Antenna Based on Electromagnetic Metamaterials

基于互补开口谐振环(CSRR)和短路结构,设计了针对UHF波段应用的小型化微带天线,通过在天线地平面上蚀刻CSRR结构有效降低了微带天线的谐振频率。并在加载CSRR结构的基础上,进一步加载了短路结构,使得谐振频率降至UHF频段。该天线的谐振频率为810MHz,其电尺寸仅为0.115λ0×0.088λ0×0.032λ0,效率接近90%,且方向图拥有全向辐射特性,在移动通信等领域有着十分广泛的应用空间。

In this paper,based on the complementary split resonance ring(CSRR)and short pin structure,a miniaturized microstrip antenna designed for UHF band is designed.By etching the CSRR structure on the ground plane of the antenna,the electrical size of the microstrip antenna is effectively reduced.On the basis of loading the CSRR structure,the short-circuit structure is further loaded,so that the resonance frequency become lower.The resonant frequency of this antenna is 810MHz,its electrical size is only 0.115λ0×0.088λ0×0.032λ0,the efficiency is close to 90%,and an omnidirectional radiation characteristics is achieved,so it has a very wide application space in the field of mobile communications.