New broadband button-shaped antenna on innovative magneto-dielectric material for wearable applications

Author

Aldrigo, Martino ; Bianchini, Devis ; Costanzo, Alessandra ; Masotti, Diego ; Galassi, C. ; Mitoseriu, L.

Author_Institution

D.E.I.S., Univ. of Bologna, Bologna, Italy

fYear

2012

Firstpage

723

Lastpage

726

Abstract

The design and characterization of a new broadband small patch antenna, based on an innovative magneto-dielectric material and suitable for wearable applications at 868 MHz, is presented. To reduce antenna dimensions while preserving its radiation and matching performances, a barium-strontium hexaferrite Ba_0.75Sr_0.25Fe₁₂O₁₉ has been synthesized to achieve a magnetic permeability double than vacuum in the band of interest. The material is first experimentally characterized and the dispersive permittivity and permeability behaviors are accounted for during the design of a small patch antenna with a shorting-plate. Very good agreement with measurements is demonstrated for both matching and radiation performances of the antenna.

Keywords

antenna radiation patterns; barium compounds; microstrip antennas; strontium compounds; wearable antennas; Ba_0.75Sr_0.25Fe₁₂O₁₉; antenna dimension reduction; barium-strontium hexaferrite; broadband button-shaped antenna; broadband small patch antenna; dispersive permittivity; frequency 868 MHz; magnetic permeability; magneto-dielectric material; wearable applications; Antenna measurements; Magnetic resonance; Patch antennas; Permittivity; Substrates; UHF antenna; magneto-dielectric material; wearable wireless systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2012 42nd European

Print_ISBN

978-1-4673-2215-7

Electronic_ISBN

978-2-87487-026-2

Type

conf

Filename

6459383