Modeling and characterization of self-biased circulators in the mm-wave range

Laur, Vincent; Vérissimo, Grégory; Quéffélec, Patrick; Farhat, Leo Arij; Alaaeddine, Hussain; Reihs, Jean-Claude; Laroche, Eric; Martin, Gilles; Lebourgeois, Richard; Ganne, Jean‐Pierre

doi:10.1109/mwsym.2015.7166760

Cited by 12 publications

(1 citation statement)

References 7 publications

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“…These properties allow for the RF engineer to design the operational frequency (i.e., center) and device performance based on material properties. Figure 1a illustrates published values of remanent magnetization, 4πM r , and FMR linewidth, ∆H FMR , of bulk Ba-hexaferrites [9][10][11][12][13][14][15][16][17]. It is clear that conventionally processed bulk Ba-hexaferrites usually exhibit a relatively low 4πM r of 1.5~3.5 kGs and broad ∆H FMR of 0.5 to 2 kOe.…”

Section: Introductionmentioning

confidence: 99%

Crystallographically Textured and Magnetic LaCu-Substituted Ba-Hexaferrite with Excellent Gyromagnetic Properties

Jiao

Wang

Wei³

et al. 2022

Materials

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Excellent gyromagnetic properties of textured, bulk Ba-hexaferrite samples are required for low-loss, self-biased applications for microwave and millimeter-wave (MMW) devices. However, conventionally processed bulk Ba-hexaferrite ceramics typically demonstrate low remanent magnetization values, 4πMr, of 2.0~3.0 kG, and relatively large ferromagnetic resonance (FMR) linewidths, ΔHFMR, of 0.8~2 kOe. These properties lead to the development of high-performance, practical devices. Herein, crystallographically textured Ba-hexaferrite samples, of the composition Ba0.8La0.2Fe11.8Cu0.2O19, having excellent functional properties, are proposed. These materials exhibit strong anisotropy fields, Ha, of ~14.6 kOe, high remanent magnetization, 4πMr, of 3.96 kGs, and a low ΔHFMR of 401 Oe at zero-bias field at the Q-band. Concomitantly, the broadband millimeter-wave transmittance was utilized to determine the complex permeability, μ*, and permittivity, ε*, of textured hexaferrites. Based on Schlöemann’s theory of complex permeability, μ*, the remanent magnetization, 4πMr, anisotropy field, Ha, and effective linewidth, ΔHeff, were estimated; these values agree well with measured values.

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Section: Introductionmentioning

confidence: 99%

Crystallographically Textured and Magnetic LaCu-Substituted Ba-Hexaferrite with Excellent Gyromagnetic Properties

Jiao

Wang

Wei³

et al. 2022

Materials

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Application of Molded Interconnect Device technology to the realization of a self-biased circulator

Laur

Mattéi

Vérissimo

et al. 2016

Journal of Magnetism and Magnetic Materials

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Modeling non-saturated ferrite-based devices: Application to twin toroid ferrite phase shifters

Gouellec

Vérissimo

Laur

et al. 2016

Journal of Applied Physics

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This article describes a new set of tools developed to improve the conception and modeling of non-saturated ferrite-based devices such as twin toroid phase shifters. These new simulation tools benefit from a generalized permeability tensor model able to describe the permeability tensor of a ferrite sample whatever its magnetization state. This model is coupled to a homemade 3D multi-scale magnetostatic analysis program, which describes the evolution of the magnetization through the definition of a hysteresis loop in every mesh cell. These computed spectra are then integrated into 3D electromagnetic simulation software that retains the spatial variations of the ferrite properties by using freshly developed macro programming functions. This new approach allows the designers to accurately model complex ferrite devices such as twin toroid phase shifters. In particular, we demonstrated a good agreement between simulated and measured phase shifts as a function of applied current values with a predicted maximum phase shift of 0.96 times the measured value.

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Modeling and characterization of self-biased circulators in the mm-wave range

Cited by 12 publications

References 7 publications

Crystallographically Textured and Magnetic LaCu-Substituted Ba-Hexaferrite with Excellent Gyromagnetic Properties

Crystallographically Textured and Magnetic LaCu-Substituted Ba-Hexaferrite with Excellent Gyromagnetic Properties

Application of Molded Interconnect Device technology to the realization of a self-biased circulator

Modeling non-saturated ferrite-based devices: Application to twin toroid ferrite phase shifters

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