Enhancement of a microwave radiometry imaging system's performance using left handed materials

Giamalaki, MI; Karanasiou, IS

dc.contributor.author	Giamalaki, MI	en
dc.contributor.author	Karanasiou, IS	en
dc.date.accessioned	2014-03-01T01:35:38Z
dc.date.available	2014-03-01T01:35:38Z
dc.date.issued	2011	en
dc.identifier.issn	1559-8985	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21136
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-79959616465&partnerID=40&md5=746f7d16da70af2be20f2b16a32513a0	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Double layered	en
dc.subject.other	Electric field distributions	en
dc.subject.other	Electromagnetic properties	en
dc.subject.other	Focusing properties	en
dc.subject.other	Green's function technique	en
dc.subject.other	Head model	en
dc.subject.other	Human head model	en
dc.subject.other	Left handed materials	en
dc.subject.other	Left-handed material	en
dc.subject.other	Matching layer	en
dc.subject.other	Microwave radiometry	en
dc.subject.other	Negative permeability	en
dc.subject.other	Negative permittivity	en
dc.subject.other	Non-invasive	en
dc.subject.other	Numerical code	en
dc.subject.other	Numerical results	en
dc.subject.other	Operating frequency	en
dc.subject.other	Semi-analytical	en
dc.subject.other	System's performance	en
dc.subject.other	Cylinders (shapes)	en
dc.subject.other	Electric fields	en
dc.subject.other	Electric properties	en
dc.subject.other	Focusing	en
dc.subject.other	Green's function	en
dc.subject.other	Imaging systems	en
dc.subject.other	Metamaterials	en
dc.subject.other	Radiometers	en
dc.subject.other	Radiometry	en
dc.subject.other	Microwaves	en
dc.title	Enhancement of a microwave radiometry imaging system's performance using left handed materials	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Aiming at the enhancement of a non invasive Microwave Radiometry Imaging System's (MiRaIS) attributes, Left Handed Materials (LHM) with negative permittivity and negative permeability simultaneously, have been utilized. The optimization of the system focusing properties is being theoretically explored, implementing a semi-analytical Green's function technique and different matching structures. In the framework of this analysis the head is modeled by a double layered cylinder while a dielectric cylindrical layer consisting of LHM is placed on the surface of the human head model with a view to achieve focusing improvement inside the brain. Numerical code executions have been conducted for two different operating frequencies (0.5 GHz and 1.0 GHz) and for matching layers of various values of thicknesses and electromagnetic properties. The numerical results for the electric field distribution inside the head model, presented in this paper, verify that the LHM can provide an increased sensitivity of the system focusing properties and thus improve its overall performance.	en
heal.publisher	E M W PUBLISHING	en
heal.journalName	Progress in Electromagnetics Research	en
dc.identifier.isi	ISI:000291930100015	en
dc.identifier.volume	117	en
dc.identifier.spage	253	en
dc.identifier.epage	265	en