Paper Info
Title
Flexible, Polarization-Diverse UWB Antennas for Implantable Neural Recording Systems.
Abstract
Implanted antennas for implant-to-air data communications must be composed of material compatible with biological tissues. We design single and dual-polarization antennas for wireless ultra-wideband neural recording systems using an inhomogeneous multi-layer model of the human head. Antennas made from flexible materials are more easily adapted to implantation; we investigate both flexible and rigid materials and examine performance trade-offs. The proposed antennas are designed to operate in a frequency range of 2-11 GHz (having S11 below -10 dB) covering both the 2.45 GHz (ISM) band and the 3.1-10.6 GHz UWB band. Measurements confirm simulation results showing flexible antennas have little performance degradation due to bending effects (in terms of impedance matching). Our miniaturized flexible antennas are 12 mm×12 mm and 10 mm×9 mm for single- and dual-polarizations, respectively. Finally, a comparison is made of four implantable antennas covering the 2-11 GHz range: 1) rigid, single polarization, 2) rigid, dual polarization, 3) flexible, single polarization and 4) flexible, dual polarization. In all cases a rigid antenna is used outside the body, with an appropriate polarization. Several advantages were confirmed for dual polarization antennas: 1) smaller size, 2) lower sensitivity to angular misalignments, and 3) higher fidelity.
Year
DOI
Venue
2016
10.1109/TBCAS.2015.2393878
IEEE Trans. Biomed. Circuits and Systems
Keywords
DocType
Volume
neural recording system,near-field,flexible antenna,ultra-wideband,dual-polarization,implantable antenna,single-polarization,average specific absorption rate (asar),biological tissues
Journal
PP
Issue
ISSN
Citations 
99
1940-9990
9
PageRank 
References 
Authors
0.88
10
5
Name
Order
Citations
PageRank
Hadi Bahrami1769.55
Seyed Abdollah Mirbozorgi2738.61
Reza Ameli390.88
Leslie A. Rusch416733.74
B Gosselin535360.22