| 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40 dBm，G/T值不小于-20
dB/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。 |
| 关键词: 相控阵 宽带天线 数字多波束 软件无线电 |
| DOI：10.3969/j.issn.1001-893x.2013.07.021 |
|
| 基金项目: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） |
|
| Design of a novel wideband digital multi-beam phased array antenna |
| REN Yan-fei,ZHANG Yun,ZENG Hao,HAO Li-hong,TANG Hong-jun |
| () |
| Abstract: |
| With the increasing numbers of beamforming, the weight, size, power consumption
of traditional digital multi-beam phased array antennas may increase significant
ly, and the system′s basic reliability will decrease significantly. Based on so
ftware radio theory, a new method is presented. Superheterodyne is used to reali
ze wideband signal frequency changing, and A/D or D/A converter of signals is re
alized in instantaneous bandwidth simultaneously.According to the azimuth angle,
pitch angle and frequence supported by series port, the multi-beam is formed i
n the baseband. An S-band digital multi-beam phased array antenna with 100 M
Hz instantaneous bandwidth is designed. The experimental results show that the
T/R antennas can form three independent beams simultaneously. In the azimuthal
omnidirectional scanning range of pitch angle 0°～70°, the EIRP is not less t
han 40dBm, and G/T is not less than -20 dB/K. The design can retren
ch a lot of hardware devices, and reduce the complexity of the system. |
| Key words: phased array wideband antenna digital multi-beam software radio |
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