Fast leading-edge pulse emission and spatial combination of solid-state active phased array
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摘要: 快前沿射频脉冲发射是固态有源相控阵可实现的优势功能。分析了X波段固态有源相控阵实现快前沿射频脉冲发射的必要条件,包括激励传输、功率放大、定时同步和孔径渡越等影响因素及设计要点。相应的分析结论应用于某型X波段固态有源相控阵的样机研制,最终实现了数千个固态有源通道的快前沿射频脉冲的高效空间合成,合成射频脉冲前沿低于5 ns,验证了分析与设计的有效性。Abstract: Fast leading-edge RF pulse emission is an advantageous function of solid-state active phased arrays. In this paper, the conditions of realizing fast leading-edge RF pulse emission are analyzed, including influences and design points of RF excitation transmission, power amplification, timing synchronization and aperture fill time. The conclusions are applied to a prototype design of an X-band solid-state active phased array, followed by validation test. RF pulses emitted by thousands of solid-state active channels are spatially combined into one, with the leading-edge shorter than 5 ns, which validates the analysis.
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表 1 波导色散对脉冲前沿上升时间的影响
Table 1. Effect of waveguide dispersion on pulse leading-edge
leading edge of input pulse/ns leading edge of output pulse/ns BJ100, 7 m BJ100, 14 m BJ84, 7 m BJ84, 14 m 1 4.80 7.60 2.07 3.32 2 3.85 6.14 2.44 2.81 3 4.14 5.42 3.14 3.61 5 5.53 6.30 4.92 5.12 7 7.12 7.71 6.85 6.90 10 9.84 10.07 9.90 9.79 -
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