Hostname: page-component-8448b6f56d-wq2xx Total loading time: 0 Render date: 2024-04-24T10:00:47.673Z Has data issue: false hasContentIssue false
  • English
  • Français

Numerical and experimental characterization of a button-shaped miniaturized UHF antenna on magneto-dielectric substrate

Published online by Cambridge University Press:  02 May 2013

Martino Aldrigo ,
Alessandra Costanzo ,
Diego Masotti ,
Carlo Baldisserri ,
Ioan Dumitru  and
Carmen Galassi
Martino Aldrigo
Affiliation:
D.E.I., University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy. Phone: +39 051 2093059
Alessandra Costanzo*
Affiliation:
D.E.I., University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy. Phone: +39 051 2093059
Diego Masotti
Affiliation:
D.E.I., University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy. Phone: +39 051 2093059
Carlo Baldisserri
Affiliation:
CNR – ISTEC, Via Granarolo 64, 48018 Faenza (RA), Italy
Ioan Dumitru
Affiliation:
CARPATH, Faculty of Physics University “Al. Ioan Cuza”, Carol I Boulevard 11, 700506 Iaşi, Romania
Carmen Galassi
Affiliation:
CNR – ISTEC, Via Granarolo 64, 48018 Faenza (RA), Italy
*
Corresponding author: A. Costanzo Email: alessandra.costanzo@unibo.it
Get access Rights & Permissions [Opens in a new window]

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 performance, a barium-strontium hexaferrite Ba0.75Sr0.25Fe12O19 has been synthesized as the antenna substrate to achieve magnetic permeability double than vacuum in the band of interest. First material realization is characterized and dispersive permittivity and permeability behaviors are included in the design of a small patch antenna with a shorting-plate. A button-size realization is obtained and its suitability for wearable applications is numerically and experimentally demonstrated on body with and without the presence of conductive shielding. Very good agreement with measurements is demonstrated for both matching and radiation performance of the antenna.

Keywords

UHF electrically small antennasMagneto-dielectric substratesWearable systemsHexaferrites
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 5 , Special Issue 3: European Microwave Week 2012 , June 2013 , pp. 231 - 239
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Waterhouse, R.B.; Targonski, S.D.; Kokotoff, D.M.: Design and performance of small printed antennas. IEEE Trans. Antennas Propag., 46 (11) (1998), 1629–1633.Google Scholar
[2]Mosallaei, H.; Sarabandi, K.: Engineered meta-substrates for antenna miniaturization, in URSI International Symposium on Electromagnetic Theory, Pisa (Italy), May 2004.Google Scholar
[3]Mosallaei, H.; Sarabandi, K.: Design and modeling of patch antenna printed on magneto-dielectric embedded-circuit metasubstrate. IEEE Trans. Antennas Propag., 55 (1) (2007), 45–52.Google Scholar
[4]Ozgur, U.; Alivov, Y.; Morkoc, H.: Microwave ferrites, part 1: fundamental properties. J Mater Sci: Mater Electron, 20 (9) (2009), 789–834.Google Scholar
[5]Aldrigo, M.; Costanzo, A.; Masotti, D.; Galassi, C.: Exploitation of a novel magneto-dielectric substrate for miniaturization of wearable UHF antennas. Mater. Lett., 87 (2012), 127–130.Google Scholar
[6]Pereira, F.M.M. et al. : Magnetic and dielectric properties of the M-type barium-strontium hexaferrite (BaxSr1−xFe12O19) in the RF microwave (MW) frequency range. J Mater. Sci., Mater. Electron., 20 (2009), 408–417.Google Scholar
[7]Rizzoli, V.: Resonance measurement of single- and coupled microstrip propagation constants. IEEE Trans. Microw. Theory Tech., 25 (2) (1977), 113–120.Google Scholar
[8]CST Microwave Studio 2011, www.cst.com.Google Scholar
[9]Dionne, G.F.: Magnetic relaxation and anisotropy effects on high-frequency permeability. IEEE Trans. Magn., 39 (5) (2003), 3121–3126.Google Scholar
[10]Karilainen, A.O.; Ikonen, P.M.T.; Simovski, C.R.; Tretyakov, S.A.: Choosing dielectric or magnetic material to optimize the bandwidth of miniaturized resonant antennas. IEEE Trans. Antennas Propag., 59 (11) (2011), 3991–3998.CrossRefGoogle Scholar
[11]Pacini, A.: Studio di topologie d'antenne su substrati magneto-dielettrici, B.Sc. thesis, Faculty of Engineering of Bologna, Cesena Campus, October 2012.Google Scholar
[12]Hansen, R.C.; Burke, M.: Antennas with magneto-dielectrics. Microw. Opt. Technol. Lett., 26 (2) (2000), 75–78.Google Scholar
[13]Aldrigo, M.; Bianchini, D.; Costanzo, A.; Masotti, D.; Galassi, C.; Mitoseriu, L.: New broadband button-shaped antenna on innovative magneto-dielectric material for wearable applications, in Proc. EuMW 2012, Amsterdam (NL), 28 October–2 November 2012.Google Scholar
[14]Costanzo, A.; Donzelli, F.; Masotti, D.; Rizzoli, V.: Rigorous design of RF multi-resonator power harvesters, in Proc. European Conf. Antennas and Propagation EUCAP 2010, Barcelona (Spain), April 2010.Google Scholar
[15]Ciomaga, C.E. et al. : Magnetoelectric ceramic composites with double-resonant permittivity and permeability in GHz range: a route towards isotropic materials. Scr. Mater., 62 (8) (2010), 610–612.Google Scholar