一种新型5 GHz频段4个单元MIMO天线系统的设计

摘要

设计了一种新型4个单元的MIMO天线,服从802．11ac无线局域网( WLAN)的通信标准,即5G WiFi。天线工作在5GHz频带。天线由4个微带贴片天线组成,每个贴片单元下嵌入了一个圆柱体形状的空腔,整个系统的尺寸为100×50×0．8mm3。从仿真结果来看,所设计天线最小带宽达到260MHz,天线单元间的隔离度最小为31．8dB,最大增益为1．42dB。天线用于工作在5GHz频段的手持和其他小型无线通信设备中。%A novel 4-element MIMO antenna be designed,which conforms to the communicating stand-ards of 802. 11ac for WLAN, in other words, called 5G WiFi. The antenna operates in the 5GHz band. The antenna system was made up of four microstrip patchs,a cylindrical cavity was etched out un-derneath the center of patch. The overall dimension of the antenna was 100 × 50 × 0. 8mm3. According to the result of simulation,the design of MIMO antenna has a minimum bandwidth of 260MHz and the minimum isolation of 31. 8 dB between its antenna elements. The maximum gain for a signal element is 1. 42 dB. The proposed antenna can be used in handheld and other small wireless devices using WLAN in 5 GHz band.