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光子化研究是相控阵雷达的发展趋势,光子晶体以其优异的集成度及光学特性在相控阵雷达光子化研究中具有广泛的应用前景。基于光子晶体波导慢光特性及热光调制原理,设计了应用于相控阵雷达波束形成网路的光实时延迟线。通过优化光子晶体慢光波导参数,所设计光子晶体光实时延迟线可实现延时量为0~36.69ps的高精度调谐,得到23GHz以上的延时带宽。通过优化实时延迟线群速度随温度的色散特性,温度每变化1℃,延时量变化量在0.36~1.57ps/mm范围内。所提出的基于光子晶体波导的光实时延迟线,可实现延时量的高效、高精度调谐,相对于传统电域波束形成网络,具有集成度高、瞬时带宽大、调谐精度高等优点,为高频段宽带相控阵雷达波束形成网络的研发提供了理论基础。
Photon study is the development trend of phased array radar. Photonic crystal has a wide range of applications in photonic study of phased array radar with its excellent integration and optical properties. Based on the principle of slow photonic crystal waveguide and the principle of thermo-optic modulation, a real-time delay line is designed for phased array radar beam forming network. By optimizing the slow optical waveguide parameters of the photonic crystal, the real-time delay line of the photonic crystal light can be designed to realize the high-precision tuning of the delay amount from 0 to 36.69 ps, and the delay bandwidth of more than 23 GHz can be obtained. By optimizing the dispersion characteristics of real-time delay line group velocity with temperature, the amount of delay variation varies from 0.36 to 1.57 ps / mm for every 1 ° C change in temperature. The proposed optical real-time delay line based on photonic crystal waveguide can achieve high efficiency and high-precision tuning of the delay amount. Compared with the traditional electric-field beam forming network, it has the advantages of high integration, large instantaneous bandwidth and high tuning precision, and is high The research on broadband broadband phased array radar beamforming network provides the theoretical basis.