A study on miniaturization of a handset antenna utilizing magnetic materials

Tanaka, T.; Hayashida, Shinsaku; Imamura, K.; Morishita, H.; Koyanagi, Yoshio

doi:10.1109/apcc.2004.1391800

Cited by 9 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, a method for preparing magnetic composites that involves adding an electrical insulator to a ferromagnetic powder has been investigated to reduce the magnetic losses at high frequencies [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

The electric properties of low-magnetic-loss magnetic composites containing Zn–Ni–Fe particles

Hidaka

Ishitsuka

Shirakata

et al. 2009

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Recently, magnetic composites consisting of magnetic particles dispersed in a polymer matrix have been widely discussed for miniaturizing high-frequency electronic components such as antennae. Previously, we investigated the influence of the manufacturing process on the homogeneous dispersion of magnetic particles in the polymer and on the magnetic properties of the magnetic composites. In order to miniaturize electronic components, it is crucial to be able to independently control the permeability and permittivity in magnetic composites. This paper investigates the anisotropy and frequency dependence of the dielectric properties of magnetic composites fabricated from 20 vol% Zn(5)Ni(75)Fe(20) flaked particles. The permittivity of magnetic composites fabricated from Zn(5)Ni(75)Fe(20) flaked particles is anisotropic: at 1 GHz, the relative permittivities parallel and perpendicular to the plane of the specimens are 27.2 and 16.9, respectively. The permittivity varied little between frequencies of 50 MHz and 10 GHz.

show abstract

Section: Introductionmentioning

confidence: 99%

The electric properties of low-magnetic-loss magnetic composites containing Zn–Ni–Fe particles

Hidaka

Ishitsuka

Shirakata

et al. 2009

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Modern material manufacturing technology has made possible to design composite substrates with magnetic inclusions mixed with dielectric host materials. Antennas with magneto-dielectric materials are studied experimentally in [4][5][6][7][8][9][10][11][12][13]. Known magnetic materials tend to be lossy, and in antenna applications the radiation efficiency becomes the main figure of merit in addition to the unloaded quality factor or impedance bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Antenna Miniaturization Using Magneto-Dielectric and Dielectric Materials

Karilainen,

Ikonen,

Simovski

et al. 2009

Preprint

View full text Add to dashboard Cite

Measurement results for a meandered planar inverted-F antenna (PIFA) loaded with magnetodielectric and dielectric materials are presented. Figures of merit and ways to compare antennas with different fillings materials are discussed. The used magneto-dielectric material is described, the radiation mechanism of the meandered PIFA is studied, and the proper position for dielectric and magneto-dielectric filling is discussed and identified. Identical-size antennas with dielectric and magneto-dielectric fillings are compared at the same resonance frequency using the radiation quality factor as the figure of merit. It is seen, that the benefit from the magneto-dielectric filling material is moderate and strongly dependent on the positioning of the filling.

show abstract

“…Recently, the low loss magnetic materials are developed for the application in the UHF frequencies [3]. Tanaka et al have analyzed the magnetic material loaded planar inverted F antenna and showed that the fragmentary magnetic material inserted around the short-pin is mostly effective to miniaturize antenna size [4].…”

Section: Introductionmentioning

confidence: 99%