Research on the Application of Shaped Charge Metal Jet in Antenna

doi:10.3969/j.issn.1000-1093.2018.08.001

Abstract

Abstract: Transient miniaturized antenna is a hot topic in antenna technology research. For the application of shaped metal jets in miniaturized antennas, a research method combining theoretical analysis and numerical simulation is used. 50 mm conical shaped charge is taken as research object, a dipole antenna formed by a shaped metal jet antenna is theoretically analyzed, and the applicability of the shaped metal jet antenna to the charge structure and explosive material is numerically studied using finite element software LS-DYNA. The results show that the metal jet antenna formed by shaped charge meets the characteristics of transient miniaturization and has the length, continuity and good interface matching with the wavelength. The shaped metal jet needs to have a certain length and body when it is used as an electromagnetic pulse radiating antenna, larger gain can be obtained with a transition between the jet diameter and the slug diameter and the small change in the slug. The input impedance is minimized when the metal jet is not fully formed. The metal jet formed by the small cone angle cover better meets the antenna requirements. When the thickness of liner is 2.1-2.3 mm, the length of the formed metal jet antenna is the largest, and there exists an extreme value of radiation frequency. The forming velocity of jet antenna due to B-explosive charge exploding is greater than that of the JH-2 and TNT, and the B-explosive charge explodes to produce a metal jet with the best fracture time, the largest slug radius is moderate, and the longest antenna length is available at the time of fracture. When used as an antenna, the radiated frequency range is the largest and is more suitable for use as a shaped metal jet antenna. Key

Key words: shapedcharge, electromagneticpulse, radiatingantenna, miniaturization

CLC Number:

TJ410.3⁺33

PAN Xu-chao， SUN Meng-xiao， HE Yong， SHEN Jie， CHEN Hong， ZHANG Jiang-nan. Research on the Application of Shaped Charge Metal Jet in Antenna[J]. Acta Armamentarii, 2018, 39(8): 1457-1465.

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第39卷
第8期2018 年8月兵工学报ACTA
ARMAMENTARIIVol.39No.8Aug.2018

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[11]	ZHANG Jin-hong， LI Ru-jiang, LIU Tian-sheng. Test and Numerical Simulation for Annular and Linear Shaped Charge Projectiles Interfering the Penetrating Process of Long RodPenetrators [J]. Acta Armamentarii, 2018, 39(7): 1372-1378.
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