加载对称谐振臂的双频段5G微带天线

Dual-band 5G microstrip antenna loaded with symmetrical resonant arms

为满足工信部最新分配的5G频段要求,设计了一种加载对称谐振臂的新型微带天线。天线辐射单元主要由2个内外嵌套的圆环形贴片和附着在外侧圆环两侧的对称谐振臂贴片组成。内侧和外侧圆环尺寸分别决定天线高频与低频的谐振点位置,对称谐振臂则用于优化双频段的辐射性能。利用电磁仿真软件HFSS对天线结构进行设计与优化,并借助矢量网络分析仪对天线实物进行测试。结果表明:所设计天线具有3.27~3.80 GHz和4.80~5.08 GHz的带宽,对应的最大增益分别达到了3.27 dBi和2.34 dBi,在工作频段内满足S11小于-10 dB,电压驻波比(VSWR)小于2。所设计的天线结构简单、小巧便携、易于集成,有较好的全向辐射特性和较大的增益。

In order to meet requirement of the latest 5G frequency band assigned by the Ministry of Industry and Information Technology,a new type of microstrip antenna loaded with symmetrical resonant arms is designed.The antenna radiating unit is composed of two annular patches nested inside and outside and symmetrical resonant arm patches attached to both sides of the outer ring.The sizes of the inner and outer rings determine position of resonant point of the high and low frequency of antenna respectively,and the symmetrical resonant arm is used to optimize the radiation performance of the dual frequency bands.The electromagnetic simulation software HFSS is used to design and optimize the antenna structure,and the actual antenna is tested with the aid of a vector network analyzer.The results show that the designed antenna has bandwidths of 3.27~3.80 GHz and 4.80~5.08 GHz with the corresponding maximum gains of 3.27 dBi and 2.34 dBi,respectively.S11 is less than-10 dB and voltage standing wave ratio(VSWR)is less than 2 in the working frequency band.The designed antenna is simple in structure,compact and portable,easy to integrate,and has better omnidirectional radiation characteristics and larger gain.