具有方向图可重构特性的小型化天线设计

设计了一款具有方向图可切换特性的新型平面圆形可重构天线。该天线制作于介电常数为4.4的 RR-4介质板上,半径为60 mm,在x-o-y 平面上紧凑对称,具有低剖面、低成本、小型化的优点。天线可用阻抗带宽为2.36~2.51 GHz,可以适用于 Wibro,Bluetooth和 WLAN系统。通过改变不同辐射单元与馈电微带的连接关系,天线可在6个方向上实现波束可重构。若结合快速切换开关系统,天线可在x-o-y 平面上完成方向图电扫描。同时,测量和仿真结果具有很好一致性。

Design of compact antenna with reconfigurable lobe patterns

A novel planar circular reconfigurable antenna with six switchable lobe patterns is proposed.The antenna was fabricated on a FR-4 epoxy substrate with radius of 60 mm and relative dielectric constant of 4.4,and has a compact structure located symmetrically in x-o-y plane.The proposed antenna is of low profile,low cost and small volume,and has an available impedance bandwidth of 2.35~2.51 GHz,which can be applied in the systems of Wibro, Bluetooth,ZigBee and wireless local area networks (WLAN).By changing the connections between the radiators and feed,six reconfigurable lobe patterns are achieved.Combining rapid switchable control system of switches,the patterns can be scanned in x-o-y plane.Meanwhile,a good agreement between measured and expected results is obtained.