一种圆弧形偶极子双模基站天线的优化设计

Optimal Design of a Dual-mode Circular Arc Dipole Antenna Array for Base Station Applications

设计了一款工作于2.45GHz的双模低剖面智能天线阵列,可用于基站以提高基站发射机的等效发射功率和接收机的灵敏度。该双模天线阵列由四个圆弧形的平面偶极子和一个环形反射器组成。通过功率传输效率最大化理论优化出天线阵列所需要的最优分布激励,从而得到阵列的最优增益和前后比。该设计实现了全向模式和定向模式之间的双模切换工作,在定向模式下能够实现水平面360°波束扫描。

A low profile dual-mode smart antenna array operating at 2.45GHz was proposed, which could be used in the base stations to increase equivalent transmit power of base station transmitters and sensitivity of receivers.The antenna array consisted of four circular arc printed dipoles and a toroidal reflector.To obtain the optimal distribution of excitations for the arrays, the gain and front-back ratio of the array systems were optimized based on the maximum power transmission efficiency principle.The design is in dual-mode operation,which can switch between omnidirectional and directional radiation states,and can realize 360° beam scanning range in horizontal plane in the directional radiation state.