Multi-Polarization Reconfigurable Antenna for Wireless Biomedical System

Wong, H; Lin, W; Huitema, L; Arnaud, E

Multi-Polarization Reconfigurable Antenna for Wireless Biomedical System

Wong, H Lin, W

Huitema, L Arnaud, E

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Publication Type:: Journal Article
Citation:: IEEE Transactions on Biomedical Circuits and Systems, 2017, 11 (3), pp. 652 - 660
Issue Date:: 2017-06-01

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Field	Value	Language
dc.contributor.author	Wong, H	en_US
dc.contributor.author	Lin, W https://orcid.org/0000-0003-0337-8554	en_US
dc.contributor.author	Huitema, L	en_US
dc.contributor.author	Arnaud, E	en_US
dc.date.issued	2017-06-01	en_US
dc.identifier.citation	IEEE Transactions on Biomedical Circuits and Systems, 2017, 11 (3), pp. 652 - 660	en_US
dc.identifier.issn	1932-4545	en_US
dc.identifier.uri	http://hdl.handle.net/10453/114999
dc.description.abstract	© 2007-2012 IEEE. This paper presents a multi-polarization reconfigurable antenna with four dipole radiators for biomedical applications in body-centric wireless communication system (BWCS). The proposed multi-dipole antenna with switchable 0°, +45°, 90° and -45° linear polarizations is able to overcome the polarization mismatching and multi-path distortion in complex wireless channels as in BWCS. To realize this reconfigurable feature for the first time among all the reported antenna designs, we assembled four dipoles together with 45° rotated sequential arrangements. These dipoles are excited by the same feeding source provided by a ground tapered Balun. A metallic reflector is placed below the dipoles to generate a broadside radiation. By introducing eight PIN diodes as RF switches between the excitation source and the four dipoles, we can control a specific dipole to operate. As the results, 0°, +45°, 90° and -45° linear polarizations can be switched correspondingly to different operating dipoles. Experimental results agree with the simulation and show that the proposed antenna well works in all polarization modes with desirable electrical characteristics. The antenna has a wide impedance bandwidth of 34% from 2.2 to 3.1 GHz (for the reflection coefficient ≤-10 dB) and exhibits a stable cardioid-shaped radiation pattern across the operating bandwidth with a peak gain of 5.2 dBi. To validate the effectiveness of the multi-dipole antenna for biomedical applications, we also designed a meandered PIFA as the implantable antenna. Finally, the communication link measurement shows that our proposed antenna is able to minimize the polarization mismatching and maintains the optimal communication link thanks to its polarization reconfigurability.	en_US
dc.relation.ispartof	IEEE Transactions on Biomedical Circuits and Systems	en_US
dc.relation.isbasedon	10.1109/TBCAS.2016.2636872	en_US
dc.subject.classification	Electrical & Electronic Engineering	en_US
dc.subject.mesh	Equipment Design	en_US
dc.subject.mesh	Electric Impedance	en_US
dc.subject.mesh	Wireless Technology	en_US
dc.subject.mesh	Electromagnetic Radiation	en_US
dc.title	Multi-Polarization Reconfigurable Antenna for Wireless Biomedical System	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	11	en_US
utslib.for	0903 Biomedical Engineering	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	11	en_US

Abstract:

© 2007-2012 IEEE. This paper presents a multi-polarization reconfigurable antenna with four dipole radiators for biomedical applications in body-centric wireless communication system (BWCS). The proposed multi-dipole antenna with switchable 0°, +45°, 90° and -45° linear polarizations is able to overcome the polarization mismatching and multi-path distortion in complex wireless channels as in BWCS. To realize this reconfigurable feature for the first time among all the reported antenna designs, we assembled four dipoles together with 45° rotated sequential arrangements. These dipoles are excited by the same feeding source provided by a ground tapered Balun. A metallic reflector is placed below the dipoles to generate a broadside radiation. By introducing eight PIN diodes as RF switches between the excitation source and the four dipoles, we can control a specific dipole to operate. As the results, 0°, +45°, 90° and -45° linear polarizations can be switched correspondingly to different operating dipoles. Experimental results agree with the simulation and show that the proposed antenna well works in all polarization modes with desirable electrical characteristics. The antenna has a wide impedance bandwidth of 34% from 2.2 to 3.1 GHz (for the reflection coefficient ≤-10 dB) and exhibits a stable cardioid-shaped radiation pattern across the operating bandwidth with a peak gain of 5.2 dBi. To validate the effectiveness of the multi-dipole antenna for biomedical applications, we also designed a meandered PIFA as the implantable antenna. Finally, the communication link measurement shows that our proposed antenna is able to minimize the polarization mismatching and maintains the optimal communication link thanks to its polarization reconfigurability.

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http://hdl.handle.net/10453/114999