GCPWG technique for measurement of dielectric properties of magneto-polymer composite at microwave frequencies

Borah, Subasit; Bhattacharyya, Nidhi S.

doi:10.1109/aemc.2009.5430594

Cited by 1 publication

(2 citation statements)

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“…The average crystallite size of the NiFe 2 O 4 nanoparticles, annealed at 400 • C, is determined from X-ray diffraction (XRD) study and is found to be about 6.63 nm [11]. Transmission electron micrographs (TEM) of the ferrite particles are taken to see the microstructural properties like shape and size using JEOL-TEM-100 CXII (Collidion Coated Copper Grids) as shown in Fig.…”

Section: Microstructural Study Of the Magnetic Nanoparticlesmentioning

confidence: 99%

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Em Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External Dc Magnetic Field

Borah¹,

Bhattacharyya²

2011

PIER M

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Abstract-A tunable microwave notch filter is developed on magnetodielectric material having low saturation magnetization to attain low external dc magnetic field for biasing. A simple microstrip line at 10 GHz is developed on nickel ferrite/low density polyethylene nanocomposite system as substrates and its microwave transmission response is studied in X-band. Composite system is developed by dispersing nano sized nickel ferrite (∼6.63 nm) in low density polyethylene to obtain a homogeneous flexible substrate. Saturation magnetization of 4% volume fraction of the composite is found to be 1.8745 emu/g. Tunability of Q value and insertion loss is studied with magnitude of external dc magnetic field and at different angles of its orientation with the axial plane. A very low field up to 250 G is sufficient to tune the selectivity. An insertion loss of ∼ −30 dB and Q ∼ 375 at 10.2 GHz is observed. The interaction of magneto static modes with orientation of the applied dc magnetic bias with respect to rf magnetic field is discussed with couple mode theory. Good cutoff behaviour of more than 28 dB is observed at magnetic field angles from 23.52 • to 34.21 • . The experimental and theoretical couplings show close proximity.

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Section: Microstructural Study Of the Magnetic Nanoparticlesmentioning

confidence: 99%

“…Nickel ferrite nanoparticles are prepared by wet synthesis method by annealing the precipitate precursor powders at 400 • C temperatures [11].…”

Section: Materials Synthesismentioning

confidence: 99%

Em Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External Dc Magnetic Field

Borah¹,

Bhattacharyya²

2011

PIER M

View full text Add to dashboard Cite

show abstract

GCPWG technique for measurement of dielectric properties of magneto-polymer composite at microwave frequencies

Cited by 1 publication

References 14 publications

Em Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External Dc Magnetic Field

Em Transmission Response of Microstrip Notch Filter on Obliquely Magnetized Magneto-Dielectric Substrate in Xband Under Influence of Low Magnitude of External Dc Magnetic Field

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