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Miniaturized broadband circulators in X-Ku band using high-ε, low-loss NiCuZn ferrite and embedded substrates.

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Title: Miniaturized broadband circulators in X-Ku band using high-ε, low-loss NiCuZn ferrite and embedded substrates.
Authors: Cheng, Zelai1 (AUTHOR), Qiao, Feng2 (AUTHOR), Yang, Xiuling2 (AUTHOR), Chen, Ying3 (AUTHOR), Qu, Mingshan2 (AUTHOR), Su, Hua1 (AUTHOR) uestcsh77@163.com
Source: Ceramics International. May2026:Part A, Vol. 52 Issue 12, p19360-19367. 8p.
Subjects: Circulators (Electrical engineering), Ferrites, Ferrimagnetic materials
Abstract: The pressing demand for miniaturized, high-frequency circulators in the X- and Ku-bands drives the development of low-loss, high dielectric constant NiCuZn ferrites. Building on previous work that enhanced dielectric constant of NCZ ferrites via Mn2+–Nb5+ co-doping and Ba 0.6 Sr 0.4 TiO 3 compositing, a new strategy involving the co-substitution of Cu2+ and Ti4+ ions was proposed. This approach aims to reduce magnetocrystalline anisotropy at octahedral sites, thereby lowering the ferromagnetic resonance linewidth. At an optimal substitution level of x = 0.04, a balanced set of properties was achieved: a high dielectric constant (ε r ≈ 22.5), high saturation magnetization (4π M s ≈ 3596 G), and a low linewidth (ΔH ≈ 187 Oe). The material also demonstrated excellent co-firing compatibility with LiNb 0.6 Ti 0.4 O 3 (LNT) dielectric ceramic, enabling the fabrication of an embedded composite substrate. Based on this structure, a wideband microstrip circulator was designed and simulated, exhibiting excellent performance from 8 to 18 GHz—with return loss and isolation below −20 dB, insertion loss under 0.7 dB, and a fractional bandwidth of 77%. These results validate the strong potential of the developed material system for miniaturized, wideband, high-frequency circulators. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 193756330
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  Data: Miniaturized broadband circulators in X-Ku band using high-ε, low-loss NiCuZn ferrite and embedded substrates.
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  Data: <searchLink fieldCode="AR" term="%22Cheng%2C+Zelai%22">Cheng, Zelai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qiao%2C+Feng%22">Qiao, Feng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Xiuling%22">Yang, Xiuling</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Ying%22">Chen, Ying</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qu%2C+Mingshan%22">Qu, Mingshan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Su%2C+Hua%22">Su, Hua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> uestcsh77@163.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. May2026:Part A, Vol. 52 Issue 12, p19360-19367. 8p.
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– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The pressing demand for miniaturized, high-frequency circulators in the X- and Ku-bands drives the development of low-loss, high dielectric constant NiCuZn ferrites. Building on previous work that enhanced dielectric constant of NCZ ferrites via Mn2+–Nb5+ co-doping and Ba 0.6 Sr 0.4 TiO 3 compositing, a new strategy involving the co-substitution of Cu2+ and Ti4+ ions was proposed. This approach aims to reduce magnetocrystalline anisotropy at octahedral sites, thereby lowering the ferromagnetic resonance linewidth. At an optimal substitution level of x = 0.04, a balanced set of properties was achieved: a high dielectric constant (ε r ≈ 22.5), high saturation magnetization (4π M s ≈ 3596 G), and a low linewidth (ΔH ≈ 187 Oe). The material also demonstrated excellent co-firing compatibility with LiNb 0.6 Ti 0.4 O 3 (LNT) dielectric ceramic, enabling the fabrication of an embedded composite substrate. Based on this structure, a wideband microstrip circulator was designed and simulated, exhibiting excellent performance from 8 to 18 GHz—with return loss and isolation below −20 dB, insertion loss under 0.7 dB, and a fractional bandwidth of 77%. These results validate the strong potential of the developed material system for miniaturized, wideband, high-frequency circulators. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ceramint.2026.03.033
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        Text: English
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              Text: May2026:Part A
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              Y: 2026
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