Low-profile antenna with optimal polarization for 2.45 GHz on-body sensor nodes

Author

Berg, Markus ; Tuovinen, Tommi ; Salonen, Erkki T.

Author_Institution

Dept. of Commun. Eng., Univ. of Oulu, Oulu, Finland

fYear

2014

fDate

10-11 Nov. 2014

Firstpage

641

Lastpage

643

Abstract

In this paper, a low-profile on-body antenna is presented for wireless body area network (WBAN) use in 2.45 GHz frequency band. A new design philosophy, where the shape of the antenna structure forms the outer dimensions of the device and enables embedded electronics inside the antenna, is applied in the design. The antenna structure is optimized for vertical polarization and omnidirectional radiation pattern for on-body communication. A single-component impedance matching circuit is used to obtain reasonable impedance bandwidth below the fundamental resonance frequency of the antenna. The optimized antenna structure is evaluated for on-body use by using a tissue model. It is observed that the presented approach yield to high antenna performance on-body even with the total height of 6.6 mm.

Keywords

UHF antennas; antenna radiation patterns; biological tissues; body area networks; body sensor networks; electromagnetic wave polarisation; impedance matching; omnidirectional antennas; WBAN; embedded electronics; frequency 2.45 GHz; impedance bandwidth; low-profile on-body antenna; omnidirectional radiation pattern; on-body communication; on-body sensor node; optimal polarization; single-component impedance matching circuit; tissue model; vertical polarization; wireless body area network; Antenna accessories; Antenna radiation patterns; Dipole antennas; Impedance; Wireless communication; Body area network; miniaturization; on-body antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Conference (LAPC), 2014 Loughborough

Conference_Location

Loughborough

Type

conf

DOI

10.1109/LAPC.2014.6996474

Filename

6996474