A Twin Spiral Planar Antenna for UWB Medical Radars
File(s)
Published version
Author(s)
Zito, GA
Staderini, EM
Pisa, S
Type
Journal Article
Abstract
A planar-spiral antenna to be used in an ultrawideband (UWB) radar system for heart activity monitoring is presented. The antenna, named “twin,” is constituted by two spiral dipoles in a compact structure. The reflection coefficient at the feed point of the dipoles is lower than −8 dB over the 3–12 GHz band, while the two-dipoles coupling is about −20 dB. The radiated beam is perpendicular to the plane of the spiral, so the antenna is wearable and it may be an optimal radiator for a medical UWB radar for heart rate detection. The designed antenna has been also used to check some hypotheses about the UWB radar heart activity detection mechanism. The radiation impedance variation, caused by the thorax vibrations associated with heart activity, seems to be the most likely explanation of the UWB radar operation.
Date Issued
2013-12-31
Date Acceptance
2012-11-19
Citation
International Journal of Antennas and Propagation, 2013, 2013
ISSN
1687-5869
Publisher
Hindawi
Journal / Book Title
International Journal of Antennas and Propagation
Volume
2013
Copyright Statement
© 2013 Giuseppe A. Zito et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
License URL
Subjects
0906 Electrical And Electronic Engineering
1005 Communications Technologies
Publication Status
Published
Article Number
684185