用于无线局域网的双频印刷天线

设计了一种用于2.4/5.2 GHz无线局域网频段,且具有分集功能的双频天线,天线有两个C形印刷单极子组成.每个C形印刷单极子有两条谐振路径,每条谐振路径对应一个谐振频率,因此,该天线可以工作在无线局域网的两个频段.天线的两个C形印刷单极子相互垂直,一方面接收不同极化方向的电磁波,另一方面可以减少两个印刷单极子之间的耦合.天线背面的地有一个T形的金属导带用于隔离天线的两个端口,天线的两个C形印刷单极子关于T形的金属导带呈对称分布.天线具有双频工作的能力,在其工作的每一个频段内,该天线都具有两个隔离度比较高的端口.因此,该天线具有空间分集的功能,并能够对无线通信中的多径衰落问题有所抑制.

A Dual Band Printed Antenna for WLAN Application

A dual band printed diversity antenna for 2.4/5.2GHz WLAN operation was designed.The antenna consists of two printed C-shaped monopoles which have two resonating paths each.Every resonating path corresponds to a resonating frequency,therefore,the antenna can work at the two bands of WLAN.The two printed C-shaped monopoles of the antenna are orthogonal to each other;on one hand, they can receive electromagnetic wave with different polarization,on the other hand,this placement can decrease coupling between the two monopoles.On the back of the antenna,there is a protruding T-shaped ground plane to increase the isolation between the two ports of the antenna.The two printed C-shaped monopoles are placed symmetrically with respect to the protruding T-shaped ground plane. The antenna has the ability to work at two bands,across every band it has two highly decoupled ports and can provide spatial diversity to combat the multi-path fading problem.