Hexagonal Ba-ferrites are widely suggested as materials for small antennas. In this paper, the sintering behavior and magneto-electric properties of $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ ($0.1{\leq}x{\leq}0.5$) ceramics were investigated for small antenna application. All samples...
Hexagonal Ba-ferrites are widely suggested as materials for small antennas. In this paper, the sintering behavior and magneto-electric properties of $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ ($0.1{\leq}x{\leq}0.5$) ceramics were investigated for small antenna application. All samples of $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ ceramics were prepared by the solid-state reaction method and sintered at $1250^{\circ}C$. From the XRD patterns of the sintered $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ceramics, the Z-type phases were found to be the main phases. The real part of permittivity and permeability of the $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ceramics decreased with frequency. On the other hand, loss tangents of permittivity and permeability tended to behave opposite to real part of permittivity and permeability. The real part of permeability was affected by Mn additions. The real part of permittivity, the loss tangent of permittivity and the real part of permeability, the loss tangent of permeability of $Ba_3Co_{0.2}Mn_{0.8}Fe_{24}O_{41}$ ceramics were 19.774, 0.176 and 15.183, 0.073, respectively, at 510 MHz. In order to investigate the effect of magneto-dielectric ceramics on antenna, PIFA (Planar Inverted F Antenna) was simulated with CST (Computer Simulation Technology). The operating frequency of antenna was decreased without considerable change of bandwidth by using the $Ba_3Co_{0.2}Mn_{0.8}Fe_{24}O_{41}$ ceramics as the carrier.
Hexagonal Ba-ferrites are widely suggested as materials for small antennas. In this paper, the sintering behavior and magneto-electric properties of $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ ($0.1{\leq}x{\leq}0.5$) ceramics were investigated for small antenna application. All samples of $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ ceramics were prepared by the solid-state reaction method and sintered at $1250^{\circ}C$. From the XRD patterns of the sintered $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ceramics, the Z-type phases were found to be the main phases. The real part of permittivity and permeability of the $Ba_3Co_{2-2x}Mn_{2x}Fe_{24}O_{41}$ceramics decreased with frequency. On the other hand, loss tangents of permittivity and permeability tended to behave opposite to real part of permittivity and permeability. The real part of permeability was affected by Mn additions. The real part of permittivity, the loss tangent of permittivity and the real part of permeability, the loss tangent of permeability of $Ba_3Co_{0.2}Mn_{0.8}Fe_{24}O_{41}$ ceramics were 19.774, 0.176 and 15.183, 0.073, respectively, at 510 MHz. In order to investigate the effect of magneto-dielectric ceramics on antenna, PIFA (Planar Inverted F Antenna) was simulated with CST (Computer Simulation Technology). The operating frequency of antenna was decreased without considerable change of bandwidth by using the $Ba_3Co_{0.2}Mn_{0.8}Fe_{24}O_{41}$ ceramics as the carrier.
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제안 방법
In this paper, all samples of Ba3Co2-2xMn2xFe24O41 ceramics were manufactured by the solid-state reaction method and their microwave characteristics were estimated by using the HP network analyzer.
4, permeability: 1) is mostly used as the dielectric material, especially as the carrier material in PIFA, because of its low price. In this paper, we changed the carrier material from FR4 to the Ba3Co0.2Mn0.8Fe24O41 ceramics to confirm the effect of magneto-dielectric ceramics on antenna performance. The size of the designed antenna was 50× 10× 3 mm3 and that of the ground was 50 × 90× 1 mm3.
All magnetic ceramics were prepared by the solid-state reaction method. Microstructural and microwave properties were investigated using X-ray diffraction patterns (XRD), scanning electron microscopy (SEM) and a network analyzer.
대상 데이터
In this study, the structural and microwave properties of Ba3Co2-2xMn2xFe24O41 ceramics were investigated. All Ba3Co2-2xMn2xFe24O41 ceramics were prepared by the solidstate reaction method and sintered at 1250℃.
The starting materials for the synthesis of the samples were highly purified BaCO3, CoO, MnO and Fe2O3 with purity higher than 99.9%. The purified BaCO3, CoO, MnO and Fe2O3 were stoichiometrically weighed and ball-milled for 24 hours with alcohol medium and zirconia balls to form the Ba3Co2-2xMn2xFe24O41 (0.
이론/모형
5), according to sintering temperature and amount of Mn addition. All magnetic ceramics were prepared by the solid-state reaction method. Microstructural and microwave properties were investigated using X-ray diffraction patterns (XRD), scanning electron microscopy (SEM) and a network analyzer.
The bulk densities of the polished samples were measured using the Archimedes method with distilled water. The crystalline structures were analyzed by X-ray diffraction patterns using CuKα emission.
The relative permittivity (ε´), relative permeability (μ´) and loss tangents (ε˝/ε´, μ˝/ μ´) were measured using the coaxial air-line method [6] and calculated by the NRW algorithm [7, 8].
To investigate the feasibility of magneto-dielectric ceramics as materials for the antenna component, the antenna was simulated with CST (Computer Simulation Technology), which is used as a 3D electro-magnetic analysis tool. Fig.
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