Magneto-Dielectric Nanocomposite for Antenna Miniaturization and SAR Reduction

Han, Kyu Seok; Swaminathan, Madhavan; Pulugurtha, Raj; Sharma, Himani; Tummala, Rao; Yang, Songnan; Nair, V.

doi:10.1109/lawp.2015.2430284

Cited by 42 publications

(13 citation statements)

References 11 publications

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“…R-cards were used in [9] where SAR reduction was achieved with degradation of radiation efficiency. Recently, magneto-dielectric nano composite materials as substrate were used in [10] to reduce the SAR. Although the use of the above techniques is successful in reduction of SAR, the design is complex, and the size of the antenna also increases.…”

Section: Introductionmentioning

confidence: 99%

An Effective Sar Reduction Technique of a Compact Meander Line Antenna for Wearable Applications

Bhattacharjee¹,

Mitra²,

Chaudhuri³

2017

PIER M

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Abstract-In this paper, a symmetrically structured meander line antenna placed around a T-shaped junction with truncated ground planes is proposed for wearable applications. The designed antenna has a percentage bandwidth of 69.04% covering the GSM 1800 band industrial scientific and medical (ISM) 2.4-2.5 GHz band, 4G LTE band 7 (2.5-2.69 GHz). The antenna is compact in nature with a size of 30× 40× 1.6 mm 3 . SAR reduction is achieved without the attachment of any additional unit. It is found that the application of designed truncated ground planes around positions of high electric field (E-field) region is an effective solution for reduction of Specific Absorption Rate (SAR) significantly through field cancellation technique. Maximum temperature elevation due to electromagnetic wave absorption has also been computed. The antenna is simulated over a homogenous human dry skin model as well as over a head model. The proposed design is fabricated and measured, and it is found to be compatible for real world applications while considering its miniaturization, radiation patterns and SAR limitations.

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Section: Introductionmentioning

confidence: 99%

An Effective Sar Reduction Technique of a Compact Meander Line Antenna for Wearable Applications

Bhattacharjee¹,

Mitra²,

Chaudhuri³

2017

PIER M

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“…33 Han et al demonstrated that the downsizing of an antenna can be achieved by using magneto-dielectric nanocomposite (MDNC) materials as substrate. 34 The proposed substrate was synthesized by mixing cobalt nanoparticles in fluoropolymer matrix. A Meander planar inverted-F antenna (PIFA) designed based on MDNC material is depicted in Fig.…”

Section: Antenna Applicationsmentioning

confidence: 99%

“…Microwave devices using magnetic materials. (a) Magnetic thin film-based microwave noise suppressor,24 (b) Meander planar inverted-F antenna (PIFA) on magneto-dielectric nanocomposite (MDNC) material,34 (c) magnetically tunable band-pass filters37 and (d) spintronic device as nanoscale microwave oscillator15 (modified and redrawn using the data from Refs. 24, 34, 37 and 15).…”

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confidence: 99%

Applications of Microwave Materials: A Review

Raveendran

Sebastian

Raman

2019

Journal of Elec Materi

136

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The performance of microwave devices mainly depends on the properties of materials used in the fabrication. Knowledge of material properties at microwave frequencies is a prerequisite to select suitable materials for various microwave applications and vice versa. In this review, seven categories of materials and their applications in a microwave regime are elaborately discussed. The categories include magnetic materials, carbon-based materials, flexible or stretchable materials, biomaterials, phantoms, tunable materials and metamaterials. A brief overview of other important microwave materials such as low-loss ceramic dielectric materials, low-loss polymer ceramic composites, glass ceramics and multilayer ceramics is also given. The objective of this review is to expose the world of materials for wide microwave applications and thereby properly assisting the material selection for specific applications. Moreover, this review has dual significance. It helps material scientists to develop new materials and modify the properties of the available materials with respect to the application requirements. It also assists microwave engineers to select and use appropriate materials for different microwave applications.

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“…It has an additional advantage that the permittivity can be controlled by varying the concentration of Barium Titanate in the composite [21][22][23][24]. Also, using similar chemical approaches, a composite can be prepared wherein permittivity and permeability of the material can be varied simultaneously, as demonstrated by various research groups [25][26][27][28]. Hence, with the use of these magneto-dielectric composites, it is possible to realize the GIM cloak for the current purpose.…”

Section: Simulations In S-bandmentioning

confidence: 99%

Scattering and Coupling Reduction of Dipole Antenna Using Gradient Index Metamaterial Based Cloak

Bisht¹,

Srivastava²

2020

PIER M

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A gradient index metamaterial (GIM) based conformal cloak is utilized to reduce the overall scattering of a dipole antenna and its blockage effect when being placed in close proximity of a horn antenna. The reduction in scattering is attributed to wave conversion properties of GIM cover, by virtue of which the propagating waves get converted to surface waves and vice versa, thus reducing the scattering signature of the dipole. The GIM cover also has the advantage of larger bandwidth than single metasurface based cloaks (mantle cloak). The proposed GIM based cloak proves to be effective in reducing the mutual interference between dipole and horn antenna without disrupting the performance of individual antennas in their respective frequency band of interest. The Ansys HFSS simulation results are presented to demonstrate the effectiveness of GIM based cover to reduce mutual blockage effect between a low band dipole and an S-band horn antenna.

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Magneto-Dielectric Nanocomposite for Antenna Miniaturization and SAR Reduction

Cited by 42 publications

References 11 publications

An Effective Sar Reduction Technique of a Compact Meander Line Antenna for Wearable Applications

An Effective Sar Reduction Technique of a Compact Meander Line Antenna for Wearable Applications

Applications of Microwave Materials: A Review

Scattering and Coupling Reduction of Dipole Antenna Using Gradient Index Metamaterial Based Cloak

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