Bi<sub>2</sub>O<sub>3</sub> adjusting equivalent permeability and permittivity of M-type barium ferrite for antenna substrate application

Guo, Lei; Yang, Yan; Rao, Yiheng; Gan, Gongwen; Zhang, Huaiwu

doi:10.1088/2053-1591/ab069c

Cited by 7 publications

(6 citation statements)

References 16 publications

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“…Of these, the decrease in Fe 2+ can contribute to a reduction in the residual loss of the ferrite. 33 Therefore, a suitable Co-Zr co-substitution content can be beneficial to an increase in the magnetic quality factor of the hexaferrite. In addition, the deterioration of compactness and the increase in impurity ions and pores will lead to an increase in magnetic losses.…”

Section: Resultsmentioning

confidence: 99%

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Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co₂Z hexaferrites

Huo

Zhang

et al. 2023

J Am Ceram Soc.

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A series of Ba1.5Sr1.5Co2+xZrxFe24‐2xO41 hexaferrites (x = 0.00, 0.01, 0.03, 0.05, 0.07, and 0.09) were successfully prepared by the conventional solid‐state reaction method. It was found that as the Co2+ and Zr4+ ions entered the hexaferrite structure, the lattice parameters increased, whereas the relative density increased when x = 0.00‐0.03 and then decreased. A suitable amount of substitution increased the DC resistivity, reduced the magnetic and dielectric losses, and made the μ′$\mu ^{\prime}$ and ε′$\varepsilon ^{\prime}$ closer to each other. At x = 0.03, the relative density and DC resistivity of the samples reached their maxim. Besides, both the magnetic and dielectric losses were lowest within the frequency range of 10 MHz‐1 GHz. Meanwhile, the hexaferrite was impedance matched to free space, and the miniaturization factor was about 15. Therefore, this low‐loss ferrite with almost equal permeability and permittivity could be meaningful for antenna miniaturization and high‐frequency applications.

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Section: Resultsmentioning

confidence: 99%

“…Moreover, the substitution brings about a reduction in the content of Fe ions (both Fe 3+ and Fe 2+ ). Of these, the decrease in Fe 2+ can contribute to a reduction in the residual loss of the ferrite 33 . Therefore, a suitable Co‐Zr co‐substitution content can be beneficial to an increase in the magnetic quality factor of the hexaferrite.…”

Section: Resultsmentioning

confidence: 99%

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co₂Z hexaferrites

Huo

Zhang

et al. 2023

J Am Ceram Soc.

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“…where 𝜀 represents the effective permittivity of the Co 2 Z/PDMS composite film, 𝜀 is the permittivity of the PDMS film, 𝜀 is the permittivity of the Co 2 Z ferrite, and p is the volume fraction of Co 2 Z ferrite particles in the composite film [10,11]. The 𝜀 of PDMS is about 3.0, and the 𝜀 of the hexaferrite in this work is about 16.…”

Section: (B)mentioning

confidence: 91%

Design of Co2Z ferrite/PDMS composites with enhanced magnetic-dielectric properties for flexible electronics

Huo,

Su,

Huang

2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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In this study, Ba 1.5 Sr 1.5 Co 1.8 Mn 0.2 Fe 23 O 41 ferrite particles were prepared by the solid-phase reaction method and dispersed in the PDMS matrix. The obtained composite films were systematically studied. The ferrite particles were dispersed uniformly in the PDMS matrix, except the sample at x = 2 g, which showed agglomeration. With the increase of filler content, the saturation magnetization of the composite films increases, and the permeability and permittivity also increase to different degrees. In particular, the dielectric loss is low (tan𝛿 < 0.005 at 500 MHz). The filling of Co 2 Z ferrite improves the high-frequency magneto-dielectric properties of PDMS, and the composite films have potential in flexible electronics.

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“…Microstrip antennas have been widely used in wireless communication systems because of their low profile. However, with the rapid development of the flexible electronics industry, it is a challenge to achieve flexibility and diversity of the substrates [4][5][6][7][8]. Zain et al [4] presents a rectangular patch antenna, which has been developed using Bambusa vulgaris and high-density polyethylene as a bio-composite substrate, for wireless application.…”

Section: Introductionmentioning

confidence: 99%

“…These bamboos need to be turned into sawdust before they combined with a polymer, which is a complicated process. Other work also involved the similar elaborate materials, such as a Bi2O3 enhanced Co-Ti doped M-type barium ferrite contains magnetic and dielectric properties [5]; in [6], a circular polarization antenna is designed on a poly (ether imide)/(Ba 0.8 Sr 0.2 )(Ti 0.9 Zr 0.1 )O 3 composite substrate for the applications of radio-frequency identification readers. Recently, the dielectric properties of a single material are improved by studying the microstructure of the material and combining Ni-Zn ferrite ceramics with bismuth ions [7].…”

Section: Introductionmentioning

confidence: 99%

Flexible ultra-wideband cartoon-shaped antenna based on a composite with customizable dielectric properties

Deng¹,

Wei²,

Jing³

et al. 2022

Smart Mater. Struct.

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This paper presents a flexible ultra-wideband (UWB) and deformation-insensitive antenna. The proposed antenna was based on a Mickey-shaped patch, a coplanar waveguide fed, and a flexible composite substrate, which was built by a polydimethylsiloxane (PDMS) matrix and short-diameter powders of polytetrafluoroethylene (PTFE), with customizable dielectric properties. Furthermore, PTFE, magnesium oxide, titanium oxide, and zirconia powders were used as four fillers with different weight ratios to modify and control the dielectric properties of the dielectric substrate (the relative permittivity: 2.75–3.07, the dielectric loss tangent: 0.02–0.05), and then we characterized PDMS-based composites through Young’s modulus, Raman spectra, and surface topography. Finally, we fabricated and measured the proposed antenna with the dimensions of 50 mm × 60 mm × 0.5 mm. The measured reflection coefficient curves showed an operating frequency band from 1.9 GHz to 43.5 GHz, and the measured fractional bandwidth reached 183.3%. It was proved that the antenna had stable performance when it was bent or stretched. Moreover, the antenna was simulated and measured in the proximity of the human body, which verified the antenna robustness and safety for use on a human. The proposed UWB and deformation-insensitive antenna is a promising candidate for wearable applications and wireless communication.

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Bi₂O₃ adjusting equivalent permeability and permittivity of M-type barium ferrite for antenna substrate application

Cited by 7 publications

References 16 publications

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co₂Z hexaferrites

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co₂Z hexaferrites

Design of Co2Z ferrite/PDMS composites with enhanced magnetic-dielectric properties for flexible electronics

Flexible ultra-wideband cartoon-shaped antenna based on a composite with customizable dielectric properties

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Bi2O3 adjusting equivalent permeability and permittivity of M-type barium ferrite for antenna substrate application

Cited by 7 publications

References 16 publications

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co2Z hexaferrites

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co2Z hexaferrites

Design of Co2Z ferrite/PDMS composites with enhanced magnetic-dielectric properties for flexible electronics

Flexible ultra-wideband cartoon-shaped antenna based on a composite with customizable dielectric properties

Contact Info

Product

Resources

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Bi₂O₃ adjusting equivalent permeability and permittivity of M-type barium ferrite for antenna substrate application

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co₂Z hexaferrites

Crystal structure and magneto‐dielectric properties of Co‐Zr co‐substituted Co₂Z hexaferrites