为了满足基站和无线局域网应用对全向高增益天线的需求,提出了一种基于集总巴伦结构的集成化印刷偶极天线的设计。首先,根据3 dB 电桥电路原理,设计了一种集总巴伦结构,并通过仿真软件验证了集总巴伦结构的性能。集总巴伦由微带线和集总元件组成,输入信号进入巴伦后,可以从两个输出端口输出振幅相等、相位相差180°的信号;然后,根据最大传输最小反射原则设计了偶极子天线,并将集总巴伦与印刷在介质基板两侧的偶极子天线集成在一起,完成了巴伦集成型偶极子天线的设计;最后,通过电磁仿真计算与优化,确定了天线的最优结构,并进行了实物加工和测量。实测结果表明,该天线可以在1. 35 GHz ~1. 45 GHz 的带宽范围内实现水平全向高增益辐射。该天线具有重量轻、剖面低、易于调谐的特点,为通信、广播和军事系统终端天线阵提供了一种新颖的单元天线结构。

In order to meet the demand for omnidirectional high gain antennas in base stations and wireless local area network applications, a design of an integrated printed dipole antenna based on lumped Balun structure is proposed. Firstly, a lumped Balun structure is designed according to the principle of a 3 dB bridge circuit, and the performance of the lumped Balun structure is verified by simulation software. The lumped Balun is composed of microstrip lines and lumped elements. After the input signal enters the Balun, signals with equal amplitude and 180° phase difference can be output from two output ports. Then, according to the principle of maximum transmission and minimum reflection, the dipole antenna is designed, and the lumped Balun is integrated with the dipole antennas printed on both sides of the dielectric substrate to complete the design of the Balun integrated dipole antenna. Finally, the optimal structure of the antenna is determined through electromagnetic simulation calculation and optimization, and prototype fabrication and measurement are carried out. The measured results show that the antenna can achieve horizontal omnidirectional high-gain radiation in the bandwidth range of 1. 35 GHz~ 1. 45 GHz. This antenna has the characteristics of light weight, low profile, and easy tuning, which provides a novel antenna structure for communication, broadcasting, and military system terminal antenna arrays.

TN828.6

陕西省重点研发计划资助项目(2022ZDLGY01-04)