Abstract
The exact calculation of height of burst has always been a challenge in the design of proximity fuzes. Radio frequency-based sensors can be designed for this purpose but the size and bandwidth of the antenna increases the design complexity; hence, miniaturization of the patch antenna using barium hexaferrite (BaFe12O19) as substrate material is proposed in this paper. The nanohexaferrite substrate material was prepared using a wet chemical method and characterized for structural and electromagnetic properties. An average crystallite size of 60 nm was obtained from x-ray diffraction. Scanning electron microscopy and transmission electron microscopy also confirms the formation of homogenous nanoferrites. Complex permittivity (ɛ * = 6.2 − 0.04 j) and complex permeability (μ * = 1.9 − 0.18 j) were obtained from electromagnetic characterization. The antenna structure fabricated and simulated confirms that, with the obtained electromagnetic parameters of synthesized magneto-dielectric material, the size of antenna can be reduced up to 42.5%. It also increases the bandwidth from 68 MHz to 166 MHz with respect to antenna on FR4 substrate. Therefore, BaFe12O19 is proposed as a suitable candidate for a high-bandwidth, miniaturized antenna for proximity fuzes.
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Saini, A., Thakur, A. & Thakur, P. Miniaturization and Bandwidth Enhancement of a Microstrip Patch Antenna Using Magneto-Dielectric Materials for Proximity Fuze Application. J. Electron. Mater. 46, 1902–1907 (2017). https://doi.org/10.1007/s11664-016-5256-0
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DOI: https://doi.org/10.1007/s11664-016-5256-0