Measure the Complex Permeability of Ferromagnetic Thin Films: Comparison Shorted Microstrip Method With Microstrip Transmission Method

Wu, Yunqiu; Tang, Zongxi; Xu, Yuehang; Zhang, Biao

doi:10.2528/pierl09082004

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…The resonant behavior observed in the real and imaginary parts of the relative permeability of the magnetic thick film can be attributed to the inherent ferromagnetic resonance (FMR) of the magnetic film. Similar observations have been made previously [28,[30][31][32][33]. The FMR frequency can be observed between 3 and 3.5 GHz.…”

Section: High Frequency Performance Of Different Printed Patternssupporting

confidence: 78%

See 1 more Smart Citation

Utilization of Screen Printed Low Curing Temperature Cobalt Nanoparticle Ink for Miniaturization of Patch Antennas

Nelo¹,

Palukuru²,

Juuti³

et al. 2012

PIER

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Abstract-This investigation is one of the first steps towards the realization of low-cost, mass producible, miniaturized antenna solutions utilizing screen printed magnetic thick films of cobalt nanoparticle ink. The ink has a curing temperature lower than 125 • C, feasible printing characteristics and metal loading higher than 85 wt.%. The properties are achieved by using an oxidatively polymerising natural fatty acid, linoleic acid, both as a surfactant and a binder. DSC-TGA-MS-analysis, TEM and SEM microscopies were utilized to investigate ink composition, nanoparticle coating and print quality. The resonant frequency of a microstrip patch antenna was tuned by screen printing of cobalt nanoparticle ink with different layer thicknesses on top of the antenna element. The influence of magnetic layers on resonance frequency, return loss, total efficiency and radiation pattern was measured and compared with a reference antenna without the magnetic films. For example, five layers of magnetic film (52 µm total thickness) tuned the resonance frequency (2.49 GHz) of the patch antenna by 68 MHz. The radiation efficiency of the patch antenna was increased from 39% to 43% by the loading of a 52 µm thick magnetic film compared to the reference antenna. The radiation patterns remained essentially unchanged, despite the presence of the magnetic thick films.

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Section: High Frequency Performance Of Different Printed Patternssupporting

confidence: 78%

“…The shorted microstrip transmission-line perturbation (SMTLP) measurement technique was used to determine the complex permeability of the cobalt nanoparticle thick films [28,[30][31][32][33]. A photo of the microstrip fixture loaded with a printed film of the ink is shown in Fig.…”

Section: Dielectric Properties Of Magnetic Ink and Related Antenna Stmentioning

confidence: 99%

Utilization of Screen Printed Low Curing Temperature Cobalt Nanoparticle Ink for Miniaturization of Patch Antennas

Nelo¹,

Palukuru²,

Juuti³

et al. 2012

PIER

View full text Add to dashboard Cite

show abstract

“…Properties of the realized coating, inks and prints are presented and discussed. Furthermore, magnetic properties of the printed films were characterized with different amounts of solid content using the shorted microstrip transmission-line perturbation (SMTLP) method [14][15][16][17] in the frequency range of 0.2 to 4 GHz.…”

Section: Introductionmentioning

confidence: 99%

Formulation of Screen Printable Cobalt Nanoparticle Ink for High Frequency Applications

Nelo¹,

Sowpati²,

Palukuru³

et al. 2010

PIER

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Abstract-In this work, magnetic metallic cobalt nanoparticles with an average particle size of 28 nm were processed as a dry powder with surface coating material and other organic additives to form a screen-printable ink to be cured at 110 • C. EFTEM and TGA-DSC-MS-analyses were used to measure the thickness of the polymer, its coverage on cobalt nanoparticles and the inorganic solid content of the ink. The resolution of the printed patterns and the print quality were evaluated by surface profiler, FESEM and optical microscopy. The relative permeability of the thick film patterns with good printability was measured with a shorted microstrip structure over the frequency range of 0.2 to 4 GHz and complex permeability values were calculated from measured scattering parameter data. The ink attained real part of complex permeability values of up to 5.13 at 200 MHz with 70 wt.% of magnetic filler. The developed ink can be utilized in various printed electronics applications such as antenna substrates and magnetic sensors.

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“…The shorted microstrip transmission-line perturbation measurement technique was used to determine the complex permeability of the cobalt nanoparticle thick films [13][14][15][16][17][18].…”

Section: Methodsmentioning

confidence: 99%

Miniaturisation of dual band monopole antennas loaded with screen printed cobalt nanoparticle ink

Sowpati

Nelo

Palukuru

et al. 2013

IET Microwaves, Antennas & Propagation

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In this study, miniaturisation of dual band monopole antennas has been investigated with the screen printed magnetic thick films of cobalt nanoparticle ink. The resonant frequencies of antennas were tuned by printing of the ink with different layer thicknesses on top of the antenna elements. The influence of magnetic layers on resonance frequency, return loss, total efficiency and radiation pattern were measured and compared with a reference antenna without layers. For example, five layers of magnetic film (total thickness of 90 µm) on the monopole antenna tuned the frequency by 137 and 297 MHz in the lower (900 MHz) and upper frequency (1800 MHz) bands, respectively. The total efficiency of a magnetic film loaded monopole antenna in the upper frequency band was found to be increased marginally or remain unchanged. The radiation patterns of the antenna remained essentially unchanged, despite the presence and use of the magnetic thick films.

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Measure the Complex Permeability of Ferromagnetic Thin Films: Comparison Shorted Microstrip Method With Microstrip Transmission Method

Cited by 9 publications

References 9 publications

Utilization of Screen Printed Low Curing Temperature Cobalt Nanoparticle Ink for Miniaturization of Patch Antennas

Utilization of Screen Printed Low Curing Temperature Cobalt Nanoparticle Ink for Miniaturization of Patch Antennas

Formulation of Screen Printable Cobalt Nanoparticle Ink for High Frequency Applications

Miniaturisation of dual band monopole antennas loaded with screen printed cobalt nanoparticle ink

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