基于平面弯折偶极子结构的波束可控天线

为解决因发射/接收天线相对位置变化而引起的信号衰减的问题，提出一种基于平面弯折偶极子结构的波束可控天线。该天线由6个独立的弯折偶极子辐射片与位于中心的反射片组成。通过改变馈源的位置，实现天线360°范围内的辐射方向图控制。位于中心较长的金属贴片实现电磁波的反射，增强天线特定方向的有效辐射。仿真及测试结果表明，天线工作频段为1.92~2.10 GHz，辐射前后比达到24 dBi。 6个可控辐射方向的3 dB辐射角为120°。仿真和测试结果比较吻合，该天线满足通信系统要求。

Beam-switching antenna based on plane bend-dipole structure

In order to reduce signal attenuation generated by adjusting the distance between transmitting and receiving antenna, a novel method for designing a beam-switching antenna using plane bend dipole is proposed. The antenna is composed of six independent radiating elements and common reflectors. The radiation patterns are artificially configured in 360 degrees by shifting the feed position at random. Each pattern around the common reflectors of the antenna has a wide beam width in the azimuth plane. An antenna model was designed on the substrate of FR4. The proposed antenna operates from 1.92 GHz to 2.10 GHz with F/B of 24 dBi. The radiation pattern of the antenna can be swept in the entire azimuth plane in six steps with a 3 dB beamwidth of 120°. The simulation results reveal that the antenna could be used in the base station of the wireless communication systems.