Title :
Switchable on/off-body communication at 2.45 GHz using textile microstrip patch antenna on stripline
Author :
Langley, Richard J. ; Ford, Keneth L. ; Lee, Hyung-Joo
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Sheffield, Sheffield, UK
Abstract :
The potential of using a textile microstrip patch antenna on stripline to realise a switchable on/off-body communication system at 2.45GHz is presented. Two PIN diodes are employed to achieve a reconfigurable stripline network with two output striplines, one for feeding the antenna through an aperture electromagnetically (off-body mode), and the other for propagating signals along the transmission line (on-body mode). The state of the PIN diodes is controlled by DC bias voltages supplied through bias-T connectors on both ends of the stripline. Simulations and measurements are presented for S-parameter characteristics of two samples of different length (100mm and 600mm) and they show transmission loss of around 2dB and 5dB in their on-body mode, and antenna gain of 2dBi in the off-body mode of operation.
Keywords :
S-parameters; UHF antennas; UHF diodes; antenna feeds; body area networks; microstrip antennas; p-i-n diodes; strip lines; textiles; wearable antennas; DC bias voltages; PIN diodes; S-parameter characteristics; antenna feeds; bias-T connectors; body area networks; frequency 2.45 GHz; off-body mode; on-body mode; reconfigurable stripline network; size 100 mm; size 600 mm; switchable on-off-body communication system; textile microstrip patch antenna; transmission line; transmission loss; Microstrip; Microstrip antennas; Patch antennas; Stripline; Textiles; off-body communication; on-body communication; switchable body-centric communication; textile microstrip patch antenna; textile stripline;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6206518
