摘要
传统相控阵天线系统为实现多波束，在重量、体积、功耗等方面会有明显的增加，系统的基本可靠性也显著降低。基于软件无线电思想，利用超外差结构实现宽带信号变频，并对瞬时带宽内的信号同时进行模／数或数／模变换，再根据串口提供的每个波束方位、俯仰和频率等信息，在基带实现数字多波束形成。设计了一套S频段、瞬时宽带100MHz的数字多波束相控阵天线系统。测试结果表明，该天线可收发同时形成3个独立波束，每个波束在俯仰面0°～70°、方位面全向的扫描范围内实现EIRP值不小于40dBm，G／T值不小于-20dB／K的优良指标。该设计可以有效提高系统灵活性，降低系统的复杂度。
With the increasing numbers of beamforming, the weight, size, power consumption of traditional digital multi-beam phased array antennas may increase significantly, and the system＇s basic reliability will decrease significantly. Based on software radio theory, a new method is presented. Superheterodyne is used to realize wideband signal frequency changing, and A/D or D/A converter of signals is realized in instantaneous band- width simultaneously. According to the azimuth angle, pitch angle and frequence supported by series port, the multi-beam is formed in the baseband. An S-band digital multi-bean~ phased array antenna with 100 MHz in- stantaneous bandwidth is designed. The experimental results show that the T/R antennas can form three inde- pendent beams simultaneously. In the azimuthal omnidirectional scanning range of pitch angle 0° - 70°, the EIRP is not less than 40 dBm, and G/ T is not less than - 20 dB/K. The design can retrench a lot of hardware devices, and reduce the complexity of the system.
出处
《电讯技术》
北大核心
2013年第7期932-937,共6页
Telecommunication Engineering
基金
中国电子科技集团公司第十研究所基础技术基金项目(2010-068Y)~~
关键词
相控阵
宽带天线
数字多波束
软件无线电
phased array
wideband antenna
digital multi-beam
software radio
