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<p>Ferrite composites with the composition (Ba<sub>2</sub>Zn<sub>2</sub>Fe<sub>12</sub>O<sub>22</sub>)<sub>1-x</sub>(MgFe<sub>2</sub>O<sub>4</sub>)<sub>x</sub>, where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 were synthesized using a one-pot coprecipitation method. XRD analysis confirmed the presence of Ba<sub>2</sub>Zn<sub>2</sub>Fe<sub>12</sub>O<sub>22</sub> (Zn<sub>2</sub>Y) hexaferrite and MgFe<sub>2</sub>O<sub>4</sub> (ZnF) spinel ferrite phases in the composite. FESEM revealed a microstructure consisting of platy hexaferrite grains and isotropic cubic spinel grains. The saturation magnetization decreased from 34.3 to 25.7 emu g<sup>−1</sup> with increasing MgF content. Electrical and magnetic properties permittivity (ε), permeability (µ), dielectric loss (tan δ<sub>ε</sub>), and magnetic loss (tan δ<sub>µ</sub>), were evaluated over the 10&#xa0;MHz to 1&#xa0;GHz frequency range. The miniaturization factor (n) and characteristic impedance (Z<sub>i</sub>) were also determined. A ferrite composite pellet was used as a magnetodielectric resonator to fabricate an antenna, and its parameters, such as return loss (S (1, 1)) and voltage standing wave ratio (VSWR), were analyzed using a vector network analyzer (VNA). The composition with x = 0.4 exhibited the best reflection loss of −43&#xa0;dB at an 6&#xa0;GHz resonant frequency, with a bandwidth of 0.96&#xa0;GHz. The observed VSWR (~ 1) confirmed excellent impedance matching between the fabricated antenna and the transmission line at the resonant frequency.</p>

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Ba2Zn2Fe12O22–MgFe2O4 composite with matching permittivity and permeability in high frequency range for antenna application

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Amrendra Kumar,
  • Japes Bera

摘要

Ferrite composites with the composition (Ba2Zn2Fe12O22)1-x(MgFe2O4)x, where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 were synthesized using a one-pot coprecipitation method. XRD analysis confirmed the presence of Ba2Zn2Fe12O22 (Zn2Y) hexaferrite and MgFe2O4 (ZnF) spinel ferrite phases in the composite. FESEM revealed a microstructure consisting of platy hexaferrite grains and isotropic cubic spinel grains. The saturation magnetization decreased from 34.3 to 25.7 emu g−1 with increasing MgF content. Electrical and magnetic properties permittivity (ε), permeability (µ), dielectric loss (tan δε), and magnetic loss (tan δµ), were evaluated over the 10 MHz to 1 GHz frequency range. The miniaturization factor (n) and characteristic impedance (Zi) were also determined. A ferrite composite pellet was used as a magnetodielectric resonator to fabricate an antenna, and its parameters, such as return loss (S (1, 1)) and voltage standing wave ratio (VSWR), were analyzed using a vector network analyzer (VNA). The composition with x = 0.4 exhibited the best reflection loss of −43 dB at an 6 GHz resonant frequency, with a bandwidth of 0.96 GHz. The observed VSWR (~ 1) confirmed excellent impedance matching between the fabricated antenna and the transmission line at the resonant frequency.