Compared with the single-method guidance technology, the composite guidance technology has outstanding performance in anti-stealth, anti-jamming and accurate target identification, which can effectively enhance the perception and penetration ability of aerial guided bombs, and has great military value and potential economic value. Therefore, the application of composite guidance technology in aeronautical guided bombs are reviewed in this paper. Firstly, the definition of composite guidance technology based on aerial bombs are introduced, and the common single-method guidance technology and composite guidance technology applied to aerial guided bombs are listed. Secondly, the development status of guided aerial bombs using composite guidance technology in foreign countries are described, and three important technologies of composite guidance technology in aerial guided bombs are discussed, including high-precision technology, anti-jamming technology and simulation technology of composite guidance. Finally, the development trend of this technology is summarized.
We demonstrated the application of optical frequency combs in the realization of programmable microwave photonic filters. A reconfigurable high-order PF filter based on a wide-bandwidth optical frequency comb was designed, and the increasing of the tap (comb tooth) numbers results in the increasing of the order of the microwave photonic filter. In this article, the repetition frequency of the optical frequency comb is 12.5 GHz, and the optical spectral coverage reaches 25.6 nm. The order of the RF filter obtained in the experiment reaches 256, the free spectrum range (FSR) reaches 11 GHz, the 3dB-passband width is from 300 MHz to 2.6 GHz, and the sidelobe suppression is as high as 26 dB. A progressive optical pulse shaper was used to program the tap weights, which allow us to shape the bandpass of the filter. In addition, by adjusting the spectral distribution of the optical frequency comb, two types of RF filters with different passband shapes can be realized, namely, Gaussian and Sinc filters.
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