Nanomagnetics for High-Performance, Miniaturized Power, and RF Components [Nanopackaging]

Raj, P. Markondeya; Sharma, Himani; Mishra, Dibyajat; Murali, K. P.; Han, Ki Jin; Swaminathan, Madhavan; Tummala, Rao

doi:10.1109/mnano.2012.2203878

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…Table 1 shows SIW cavity working mode, resonant frequency and dimension. The magnetodielectric material sample used for this study was synthesized using cobalt nano-particles in a fluoropolymer [6]. Fig.…”

Section: Siw Cavity Resonators Fabrication and Measurementsmentioning

confidence: 99%

Magneto-dielectric material characterization and antenna design for RF applications

Han¹,

Swaminathan²,

Pulugurtha

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Antenna miniaturization without deteriorating performance is challenging because the performance is bounded by fundamental limits depending on the size of the antenna. Magneto-dielectric materials, however, have been reported as providing new possibilities for antenna miniaturization in many recent studies. In this paper, a novel material characterization method which is a cavity perturbation technique (CPT) with substrate integrated waveguide (SIW) cavity resonator is presented for extracting the properties of magneto-dielectric material. CPT formulas for extracting complex permittivity and complex permeability are explained and modification process using 3D EM simulation tool is discussed. Design and fabrication of SIW cavity resonators is presented. The frequency dependent properties of permittivity and permeability for synthesized magneto-dielectric material are extracted in the frequency range of 1-4 GHz. Microstrip patch antenna working at 1GHz on magneto-dielectric substrate has been designed and simulated in this paper.

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Section: Siw Cavity Resonators Fabrication and Measurementsmentioning

confidence: 99%

Magneto-dielectric material characterization and antenna design for RF applications

Han¹,

Swaminathan²,

Pulugurtha

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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“…These properties are critical for component and system performance enhancement, system integration, and miniaturization. 1 Existing RF materials such as low-temperature cofired ceramics (LTCCs) and polymer dielectrics show fundamental limitations in terms of component miniaturization because of their inferior properties such as low permittivity and absence of magnetic properties. Enhancement in permittivity or permeability usually comes at the expense of dielectric loss, and temperature and frequency dependence of properties, which makes them unsuitable for use in high-performance RF components.…”

Section: Introductionmentioning

confidence: 99%

Cobalt–Polymer Nanocomposite Dielectrics for Miniaturized Antennas

Raj

Sharma

Reddy

et al. 2014

Journal of Elec Materi

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Cobalt-polymer magnetic nanocomposites have been synthesized and characterized for their microstructure and properties such as permeability, permittivity, dielectric and magnetic losses from 100 MHz to 2 GHz to study their suitability as antenna dielectrics. Oxide-passivated cobalt nanoparticles were dispersed in epoxies to form nanocomposite toroids and thin-film resonator structures on organic substrates. Permeabilities of 2.10 and 2.65 were measured up to 500 MHz, respectively, with 25-nm to 50-nm and 5-nm nanoparticles in the nanocomposites. The loss tangent ranged from 0.02 to 0.04 at these frequencies. A combination of stable permeability of $2 at 1 GHz to 2 GHz and permittivity of $7 was achieved with nanocomposites having 5-nm nanoparticles. The magnetic nanomaterials described in this paper can overcome the limitations from domain-wall and eddy-current losses in microscale metal-polymer composites, leading to enhanced frequency stability. The paper also demonstrates integration of metal-polymer nanocomposites as thin-film build-up layers with two-metal-layer structures on organic substrates.

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“…The research on microwave-absorbing materials continues to attract much attention, and ferrites is a popular material. But the use of ferrite-based absorbers requires higher performance at higher frequencies, such as X-band [9,10]. Among the conventional microwave absorption materials, the spinel-type ferrites are popular.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Interference Reflectivity of Nanostructured Manganese Ferrite Reinforced Polypyrrole Composites

Chakraborty

Chabri²,

Bhowmik³

2013

Transactions on Electrical and Electronic Materials

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Nano-size manganese ferrite reinforced conductive polypyrrole composites reveal a core-shell structure by in situ polymerization, in the presence of dodecyl benzene sulfonic acid as the surfactant and dopant, and iron chloride as the oxidant. The structure and magnetic properties of manganese ferrite nano-fillers were measured, by using X-ray diffraction and vibrating sample magnetometer. The morphology, microstructure, and conductivity of the composite were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, and four-wire technique. The microwave-absorbing properties of composites reinforcement dispersed in resin coating with the coating thickness of 1.2 nm were investigated, by using vector network analyzers, in the frequency range of 8~12 GHz. A reflection loss of-8 dB was observed at 10.5 GHz.

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Nanomagnetics for High-Performance, Miniaturized Power, and RF Components [Nanopackaging]

Cited by 7 publications

References 14 publications

Magneto-dielectric material characterization and antenna design for RF applications

Magneto-dielectric material characterization and antenna design for RF applications

Cobalt–Polymer Nanocomposite Dielectrics for Miniaturized Antennas

Electromagnetic Interference Reflectivity of Nanostructured Manganese Ferrite Reinforced Polypyrrole Composites

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