EFFECT OF PARTICLE SIZE OF BaFe&lt;sub&gt;12&lt;/sub&gt;O&lt;sub&gt;19&lt;/sub&gt; ON THE MICROWAVE ABSORPTION CHARACTERISTICS IN X-BAND

Kumar, Abhishek; Agarwala, Vijaya; Singh, and Dharmendra

doi:10.2528/pierm13011604

Cited by 53 publications

(12 citation statements)

References 25 publications

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“…Though conventional spinel ferrites also possess equivalent magnetic properties but, the better microwave absorption property of hexagonal ferrites make them superior than the former. To reduce the radiation pollution caused by increasing number of electromagnetic sources and to suppress electromagnetic interference, barium hexaferrite (BaM) is emerged as an important class of microwave absorber [7][8][9][10][11]. BaM system retains hexagonal structure consists of a closepacked stacking of oxygen layers, with the iron (Fe) atoms distributed within three kinds of octahedral sites (12k, 2a and 4f2), one tetrahedral site (4f1), and one bi-pyramidal site (2b) which are coupled by super exchange interactions through the O 2 À ions [12].…”

Section: Introductionmentioning

confidence: 99%

Electric transport properties study of bulk BaFe12O19 by complex impedance spectroscopy

Pattanayak

Panigrahi

Dash

et al. 2015

Physica B: Condensed Matter

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Section: Introductionmentioning

confidence: 99%

Electric transport properties study of bulk BaFe12O19 by complex impedance spectroscopy

Pattanayak

Panigrahi

Dash

et al. 2015

Physica B: Condensed Matter

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“…The permittivity and permeability values of developed materials have been measured through Poly Reflection/transmission method in the 8. 2-12.4 GHz frequency range at room temperature [11]. Si-Ti based ceramic powder S-T 3.…”

Section: Methodsmentioning

confidence: 99%

Design and experimental verification of a thin broadband nanocomposite multilayer microwave absorber using genetic algorithm based approach

Panwar

Agarwala

Singh

2014

AIP Conference Proceedings

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Articles you may be interested inDesign of an acoustic metamaterial lens using genetic algorithms J. Acoust. Soc. Am. 132, 2823 (2012); 10.1121/1.4744942 Experimental verification of metamaterial based subwavelength microwave absorbersAbstract. The bandwidth-thickness tradeoff of single layer microwave wave absorber has become challenge for researchers. This paper presents experimental results of thin broadband multilayer microwave wave absorbing structures using magnetic ceramic based nano-composites for absorption at X-band. A genetic algorithm (GA) based approach has been used to optimize thickness of different material layers and selection of suitable material to ensure minimum reflection. The parameters optimized through genetic algorithm have been simulated through Ansoft High Frequency structural simulator (HFSS) and experimentally verified through Absorption Testing device (ATD). It has been found that the peak value of reflection loss is -24.53 dB for 1.3 mm absorber layer coating thickness, which shows the effectiveness of absorber for various applications..

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“…Step 2: The comparative weights are calculated using the eigenvalues from the matrix as in Eqn. (2).…”

Section: Analytic Hierarchy Process Based Weightmentioning

confidence: 99%

Selection of Core shell Material based Electromagnetic Wave Absorbers in 2 to18 GHz using TOPSIS and VIKOR Ranking Methods

Singh¹,

Kumar²

2019

Def. Sc. Jl.

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Electromagnetic (EM) wave has become an integral part of this electronics dominated era with extensive application in wireless communication, health care, and military applications. This has led to the development of EM wave absorbers for camouflaging the military warheads from the enemy radar tracking systems. The development of these absorbers requires considerable resources viz. time, energy, raw materials and cost. This creates a need for selection of a better absorber from the existing ones rather than the development of a new one to save the valuable resources. The judicious selection of an efficient microwave absorber requires ranking the existing absorbers based on selection criteria. For the first time, an attempt has been made to apply the concept of multi-criteria decisionmaking methods viz. VIKOR and TOPSIS in ranking the microwave absorbers. Core-shell materials provides enhanced EM wave attenuation owing to their hierarchical composite structure which provides a better approach to tune the dielectric and magnetic properties of the composite for obtaining good impedance matching resulting into enhanced absorption. In the present work, magnitude of minimum reflection co-efficient value, absorber thickness, deviation from the central frequency (i.e. 10 GHz) and -10 dB bandwidth have been selected as the criteria for judiciously selecting suitable core-shell based EM wave absorbers in 2-18 GHz. The selected criterion has been assigned distinct weights using Analytic Hierarchy Process (AHP). The AHP derived weights have been employed in TOPSIS and VIKOR analysis for the absorbers ranking and selection.

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EFFECT OF PARTICLE SIZE OF BaFe<sub>12</sub>O<sub>19</sub> ON THE MICROWAVE ABSORPTION CHARACTERISTICS IN X-BAND

Cited by 53 publications

References 25 publications

Electric transport properties study of bulk BaFe12O19 by complex impedance spectroscopy

Electric transport properties study of bulk BaFe12O19 by complex impedance spectroscopy

Design and experimental verification of a thin broadband nanocomposite multilayer microwave absorber using genetic algorithm based approach

Selection of Core shell Material based Electromagnetic Wave Absorbers in 2 to18 GHz using TOPSIS and VIKOR Ranking Methods

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