X频段八波束接收组件的设计与实现

摘要:

针对X频段多波束有源相控阵系统的高集成、小型化、多波束等需求,设计了一款高集成、小型化的瓦片式八波束接收组件,该组件基于多层印制板技术,纵向实现了众多有源器件以及八套波束合路网络高密度布局,实现了组件的高集成化；针对组件的八波束合成需求,基于Wilkinson功分器的形式设计了一款小型化的高效合路网络,在7.5-9 GHz范围内,其插入损耗小于13 dB,端口间隔离度小于-20 dB,输出驻波比小于1.2,通道间幅相一致性良好；为降低组件内部信号的传输损耗,对组件内部的垂直互联结构进行了建模分析,得到不同结构参数对其传输性能的影响,通过优化结构参数的方法实现信号的低损耗传输。在此基础上对组件进行了加工实现,经测试,在7.5-9 GHz范围内,组件输出通道增益大于18 dB,输出驻波比小于1.5,通道间相位一致性小于±5°,尺寸仅有80 mm × 80 mm × 7.66 mm。

Abstract:

Aiming at the requirements of high integration, miniaturization and multi-beam of X-band multi-beam active phased array system, a highly integrated and miniaturized tile-type eight-beam receiving component is designed. The component is based on multi-layer printed circuit board technology. The high-density layout of many active devices and eight sets of beam combined network is realized vertically, and the high integration of the component is realized. Aiming at the eight-beam synthesis requirement of the module, a miniaturized broadband combining network is designed based on the form of Wilkinson power divider. In the range of 7.5-9 GHz, the insertion loss is less than 1 dB, the isolation between ports is less than-20 dB, and the standing wave ratio is less than 1.2. The amplitude and phase consistency between channels is good. In order to reduce the transmission loss of the signal inside the component, the vertical interconnection structure inside the component is modeled and analyzed, and the influence of different structural parameters on its transmission performance is obtained. The low loss transmission of the signal is realized by optimizing the structural parameters. On this basis, the module is fabricated and tested. In the range of 7.5-9 GHz, the output channel gain of the module is greater than 18 dB, the output standing wave ratio is less than 1.5, the phase consistency between channels is less than ± 5 °, and the size is only 80 mm × 80 mm × 7.66 mm.