一种多波长光控相控阵天线系统

A system of multi-wavelength optically controlled phased-array antennas

研究了一种新型的多波长光纤控制相控阵天线系统,此系统采用一个多波长激光光源和可编程色散矩阵(PDM)技术组成一个波束形成网格,每一波长对应一个天线单元,实现波束的全方位扫描;系统有很大的硬件压缩能力,减少了波束形成网格的复杂性和成本;同时对系统的插入损耗和噪声性能给出了估算的结果,采用掺铒光纤放大器进行分布补偿的方法,使系统的实用性增加。

A novel multi-wavelength scheme is proposed for optically controlled phased-array antennas （OCPAA）. This system adopts the method of connecting the programmable dispersion matrix （PDM） with the switch optical delay liners （SODL）. The PDM controls the angle of elevation and the SODL controls the angle of orientation, which realizes the omnidirectional scanning of the beams. Compared with the traditional point-to-point transmitting systems, this system greatly simplifies the structure and decreases the number of lasers and optical liners, but it requires better qualities of lasers and fiber amplifiers. In this paper the results of insertion loss and the quality of noise are estimated. At the same time, the method of distributed compensation by the use of fiber amplifiers is proposed, which improves the practical value of the system in application of high-quality radar and communication net- works.