A folded slot antenna with full ground plane for wearable waterproof wireless sensors

Author

Varnoosfaderani, Mohammad Vatankhah ; Thiel, David Victor ; Jun Wei Lu

Author_Institution

Griffith Sch. of Eng., Griffith Univ., Brisbane, QLD, Australia

fYear

2014

fDate

6-11 July 2014

Firstpage

838

Lastpage

839

Abstract

A 3D dual band slot antenna is presented for waterproof wearable wireless sensors. The size of the antenna is 52mm × 36mm × 12mm and the slot is etched on the internal walls of a waterproof plastic box which accommodates the sensor electronics. Numerical modeling of the structure against the body revealed a 10 dB impedance bandwidth of 12.3% at 2.45 GHz and 21% at 5.2 GHz respectively. The antenna features a full ground plane underneath which reduces the interaction between the human body and the radiator and so avoids the huge drop in antenna efficiency. The total efficiency of antenna is more than 90% in free space and reduces to 54% at 2.45 GHz and 70% at 5 GHz when located against the body.

Keywords

multifrequency antennas; numerical analysis; slot antennas; wearable antennas; wireless sensor networks; 3D dual band slot antenna; antenna efficiency; folded slot antenna; frequency 2.45 GHz; frequency 5.2 GHz; full ground plane; interaction reduction; numerical modeling; sensor electronics; waterproof plastic box; wearable waterproof wireless sensors; Dipole antennas; Sensors; Slot antennas; Wireless communication; Wireless sensor networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE

Conference_Location

Memphis, TN

ISSN

1522-3965

Print_ISBN

978-1-4799-3538-3

Type

conf

DOI

10.1109/APS.2014.6904747

Filename

6904747