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设计制作了一种用于无线通信移动终端的方向图可重构阵列天线。该阵列天线由一个激励单极子和四个长度可调的寄生印刷单极子组成,可工作于两种模式,阵列波束在方位面内有八种不同的指向。通过控制PIN开关的状态,寄生单元可以在引向器和反射器之间切换状态,方向图的主瓣指向开关断开的阵元方向。阵列天线方向图可以以45°步长覆盖方位面,工作频带覆盖WiMAX(3.40-3.69GHz)频段,辐射增益大于6dBi。在两种模式中各选取了一个指向状态,对其回波损耗和方向图进行了实测,实测结果与仿真结果吻合较好。
A pattern reconfigurable array antenna for wireless communication mobile terminal is designed and manufactured. The array antenna consists of an excitation monopole and four parasitic monopoles of adjustable length that operate in two modes, with eight different orientations of the array beam in azimuth. By controlling the state of the PIN switch, the parasitic element can switch states between the director and the reflector with the main lobe of the pattern pointing in the direction of the array element with the switch off. The array antenna pattern can cover azimuths in 45 ° steps. The operating frequency band covers the WiMAX (3.40-3.69GHz) band and the radiation gain is greater than 6dBi. In each of the two modes, a pointing state is selected, and the return loss and the directional pattern are measured. The measured results agree well with the simulation results.