Exploitation of a novel magneto-dielectric substrate for miniaturization of wearable UHF antennas

被引：21

作者：

Aldrigo, Martino ^{[1
]}

Costanzo, Alessandra ^{[2
]}

Masotti, Diego ^{[1
]}

Galassi, Carmen ^{[3
]}

机构：

[1] Univ Bologna, DEIS, I-40136 Bologna, Italy

[2] Univ Bologna, Sch Engn 2, DEIS, I-47521 Cesena, Italy

[3] ISTEC CNR, I-48018 Faenza, RA, Italy

来源：

MATERIALS LETTERS | 2012年 / 87卷

关键词：

Antennas; Magnetic materials; Dielectrics; Ceramic composites; Electrical properties; Simulation and modeling;

D O I：

10.1016/j.matlet.2012.07.101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new magneto-dielectric material for wearable antenna applications at 868 MHz is presented. A barium-strontium hexaferrite is synthesized in order to achieve the best compromise between antenna dimensions and performances, exploiting the miniaturization properties offered by relative permeability greater than unity. The electrical properties of the substrate are then experimentally characterized and the corresponding material model is derived and used during the EM-simulation-based design of a patch antenna. The maximum antenna dimension is about;lambda/20 with a maximum directivity of 6.4 dBi. Broadband simulations and measurements of the reflection coefficient and of the radiated far-field are finally compared and demonstrate the reliability of the proposed design. A shielding solution by a conductive fabric allows to minimize back radiation and thus to avoid EM interference with human body tissues. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：127 / 130

页数：4

共 9 条

[1]

Chen HM, 2005, 2005 IEEE International Workshop on Antenna Technology: Small Antennas Novel MetaMaterials, Proceedings, P299

[2] Magnetoelectric ceramic composites with double-resonant permittivity and permeability in GHz range: A route towards isotropic metamaterials [J].