Integrated metal magnetic film coupled line circulators for monolithic microwave integrated circuits

Wang, J.W.; Yoon, S. D.; Harris, Vincent G.; Vittoria, C.; Sun, Nian X.

doi:10.1049/el:20073343

Cited by 9 publications

(1 citation statement)

References 10 publications

(11 reference statements)

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“…Performance enhancement and size reduction have already been demonstrated in on-chip RF inductors [1]- [6] and transmission line elements [7]- [10]. Moreover, enhanced functionalities such as tunable [11]- [13] and nonreciprocal [14], [15] devices have been shown to be possible using silicon-compatible magnetic thin films.…”

Section: Introductionmentioning

confidence: 99%

Integrated Microstrip Lines With Co–Ta–Zr Magnetic Films

et al. 2008

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Microstrip transmission lines with ferromagnetic Co-Ta-Zr cores are investigated in this paper. Compared to nonmagnetic devices, an increase in both inductance ( 11) and quality factor ( 6) is achieved in the transmission lines. The role of the magnetic material's electrical resistivity and the effect of the shape-induced anisotropy field (created by patterning the magnetic film into narrow stripes) are discussed. It is shown that the nonuniform distribution of the shape anisotropy inside the Co-Ta-Zr pattern can be used to advantage by proper placement of the signal line, thereby increasing the ferromagnetic resonance (FMR) frequency of the magnetic core. Inductance enhancement is achieved at frequencies up to 10 GHz.Index Terms-Magnetic anisotropy, magnetic microwave devices, microstrip, planar transmission lines, soft magnetic films.

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Section: Introductionmentioning

confidence: 99%

Integrated Microstrip Lines With Co–Ta–Zr Magnetic Films

et al. 2008

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Microplasma direct writing of a copper thin film in the atmospheric condition with a novel copper powder electrode

Wang

Shi

et al. 2020

Plasma Processes & Polymers

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This study presents the microplasma direct writing of copper film in the open air using a novel copper powder electrode. The powder electrode acted as a high‐voltage electrode and the precursor source. The deposition process is realized through ion sputtering of the powder in the microplasma. The bombarded copper nanoparticles were deposited and accumulated on a silicon substrate. The deposited film is composed of copper nanoparticles with sizes in the range from tens to hundreds of nanometers, and its electrical conductivity could reach 3.96 × 105 S/m. The morphologies, chemical compositions and electrical property of the thin film can be adjusted by changing the input current, and maskless film deposition with different micropatterns can be achieved by direct microplasma scanning.

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Enhanced microwave ferromagnetic resonance absorption and bandwidth using a microstrip meander line with step-impedance low-pass filter in a yttrium iron garnet–gallium arsenide layer structure

Qiu

Tsai

Kobayashi

et al. 2008

Journal of Applied Physics

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Simulations of the step-impedance low-pass filter (LPF) in gallium arsenide (GaAs) substrate show that, in contrast to a 50Ω microstrip, the magnetic fields of the propagating microwaves are heavily concentrated in its inductive elements. The concentrated local magnetic fields facilitate enhanced coupling into an yttrium iron garnet/gadolinium gallium garnet layer over the GaAs substrate and, thus, significantly increase the microwave power absorptions at the ferromagnetic resonance (FMR) frequencies. The large tunable range of FMR frequency and the corresponding S21 and S11 parameters measured have verified the simulation results. Simultaneous enhancement of FMR absorption level and widening of absorption bandwidth has been accomplished in a band-stop filter that utilizes a microstrip meander line with four identical step-impedance LPFs, each of 5.70mm long, inserted in a nonuniform bias magnetic field. A tunable FMR absorption frequency range of 5–21GHz, an absorption level of −35.5dB, and a corresponding 3dB absorption bandwidth as large as 1.70GHz, centered at 20.3GHz, have been demonstrated.

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Integrated metal magnetic film coupled line circulators for monolithic microwave integrated circuits

Cited by 9 publications

References 10 publications

Integrated Microstrip Lines With Co–Ta–Zr Magnetic Films

Integrated Microstrip Lines With Co–Ta–Zr Magnetic Films

Microplasma direct writing of a copper thin film in the atmospheric condition with a novel copper powder electrode

Enhanced microwave ferromagnetic resonance absorption and bandwidth using a microstrip meander line with step-impedance low-pass filter in a yttrium iron garnet–gallium arsenide layer structure

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