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Half-Space Scanning Beam and Polarization Synthesis of Conical Conformal Array
Qiang LÜ, Yufei WEI, Xi CHEN, Haopeng LIU
Modern Defense Technology    2025, 53 (3): 139-149.   DOI: 10.3969/j.issn.1009-086x.2025.03.016
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The conformal array antenna is affected by the curvature of the carrier, and the pattern and polarization direction of each element are different, resulting in low beam synthesis efficiency and difficulty in suppressing high cross polarization levels when synthesizing wide-angle scanning beams. At present, most algorithms such as differential evolution are used for global optimization of conformal arrays, the process of array synthesis is complex and the synthesis efficiency is low. This paper is based on a conical conformal array layout, using a beam polarization synthesis algorithm based on projection rules to achieve efficient synthesis of wide-angle beam scanning and high polarization purity. The calculation results show that the proposed analytical algorithm can achieve high-performance beam scanning of conformal array in the half space, maintaining good low cross polarization characteristics in the main beam. The accuracy and effectiveness of the proposed algorithm are verified using high-frequency simulation software based on full wave numerical methods. This method can provide a theoretical basis for the engineering implementation of high-performance conformal array.

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Research on the Evaluation Method of Launch Flight Reliability of Missile
Jiaxi CHEN, Yuhao WANG, Chen CHENG, Xiaorui YUE
Modern Defense Technology    2024, 52 (3): 137-142.   DOI: 10.3969/j.issn.1009-086x.2024.03.017
Abstract211)   HTML2)    PDF (574KB)(176)       Save

Launch flight reliability is an important tactical index of missile. Considering that the flight test data cannot meet the high reliability requirement of missile, this paper proposes a missile reliability evaluation method based on reduced factor Bayes theory, by integrating the ground data. This method first converts the ground test data and the consistency check is carried out; then, using L-M method to convert ground data into prior information of missile flight test. Finally, the lower limit of missile launch flight reliability is evaluated based on the reduced factor Bayes theory. The results of a typical case study show that the proposed method can make full use of reliability evaluation data of the missile and its subsystem, which not only reduces the cost and risk of flight test, but also increases the rationality of the missile launch flight reliability evaluation.

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