Passive monitoring using a combination of focused and phased array radiometry: A simulation study

Farantatos, P; Karanasiou, IS; Uzunoglu, N

dc.contributor.author	Farantatos, P	en
dc.contributor.author	Karanasiou, IS	en
dc.contributor.author	Uzunoglu, N	en
dc.date.accessioned	2014-03-01T02:47:26Z
dc.date.available	2014-03-01T02:47:26Z
dc.date.issued	2011	en
dc.identifier.issn	1557170X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33150
dc.subject.other	Antenna configurations	en
dc.subject.other	Brain areas	en
dc.subject.other	Conductive walls	en
dc.subject.other	Conductivity variation	en
dc.subject.other	Contact less	en
dc.subject.other	Electric field distributions	en
dc.subject.other	Element antenna	en
dc.subject.other	Extensive simulations	en
dc.subject.other	Focusing properties	en
dc.subject.other	Head model	en
dc.subject.other	Hot spot	en
dc.subject.other	Human head model	en
dc.subject.other	Main module	en
dc.subject.other	Micro-strip patch antennas	en
dc.subject.other	Microwave radiometry	en
dc.subject.other	Multiband	en
dc.subject.other	Non-invasive	en
dc.subject.other	Passive monitoring	en
dc.subject.other	Phase difference	en
dc.subject.other	Phased array antennas	en
dc.subject.other	Scanning properties	en
dc.subject.other	Simulation studies	en
dc.subject.other	Brain	en
dc.subject.other	Computer simulation	en
dc.subject.other	Electric fields	en
dc.subject.other	Focusing	en
dc.subject.other	Hyperthermia therapy	en
dc.subject.other	Microstrip antennas	en
dc.subject.other	Microwave antennas	en
dc.subject.other	Microwave devices	en
dc.subject.other	Monitoring	en
dc.subject.other	Radiometers	en
dc.subject.other	Radiometry	en
dc.subject.other	Receiving antennas	en
dc.subject.other	Reflection	en
dc.subject.other	Scanning	en
dc.subject.other	Antenna phased arrays	en
dc.title	Passive monitoring using a combination of focused and phased array radiometry: A simulation study	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/IEMBS.2011.6090090	en
heal.identifier.secondary	http://dx.doi.org/10.1109/IEMBS.2011.6090090	en
heal.identifier.secondary	6090090	en
heal.publicationDate	2011	en
heal.abstract	Aim of this simulation study is to use the focusing properties of a conductive ellipsoidal reflector in conjunction with directive phased microwave antenna configurations in order to achieve brain passive monitoring with microwave radiometry. One of the main modules of the proposed setup which ensures the necessary beamforming and focusing on the body and brain areas of interest is a symmetrical axis ellipsoidal conductive wall cavity. The proposed system operates in an entirely non-invasive contactless manner providing temperature and/or conductivity variations monitoring and is designed to also provide hyperthermia treatment. In the present paper, the effect of the use of patch antennas as receiving antennas on the system's focusing properties and specifically the use of phased array setups to achieve scanning of the areas under measurement is investigated. Extensive simulations to compute the electric field distributions inside the whole ellipsoidal reflector and inside two types of human head models were carried out using single and two element microstrip patch antennas. The results show that clear focusing (creation of hot spots) inside the head models is achieved at 1.53GHz. In the case of the two element antennas, the hot spot performs a linear scan around the brain area of interest while the phase difference of the two microstrip patch antennas significantly affects the way the scanning inside the head model is achieved. In the near future, phased array antennas with multiband and more elements will be used in order to enhance the system scanning properties toward the acquisition of tomography images without the need of subject movement. © 2011 IEEE.	en
heal.journalName	Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS	en
dc.identifier.doi	10.1109/IEMBS.2011.6090090	en
dc.identifier.volume	2011	en
dc.identifier.spage	501	en
dc.identifier.epage	504	en