Coupling and correlation reduction in compact arrays with embedded ground defects: Experimental verification

Kakoyiannis, CG; Constantinou, P

dc.contributor.author	Kakoyiannis, CG	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T02:46:44Z
dc.date.available	2014-03-01T02:46:44Z
dc.date.issued	2010	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32818
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77955321340&partnerID=40&md5=05c4560dc3233ced9bf248e8137f135f	en
dc.relation.uri	http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=05505241	en
dc.relation.uri	http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5505241	en
dc.subject	Mutual Coupling	en
dc.subject	Sensor Nodes	en
dc.subject	Wireless Sensor Network	en
dc.subject.other	Active impedance	en
dc.subject.other	Antenna efficiency	en
dc.subject.other	Compact arrays	en
dc.subject.other	Coupling suppression	en
dc.subject.other	Experimental verification	en
dc.subject.other	Future applications	en
dc.subject.other	Ground planes	en
dc.subject.other	In-band	en
dc.subject.other	Mutual coupling	en
dc.subject.other	Quasi-periodic	en
dc.subject.other	Sensor mobility	en
dc.subject.other	Signal correlation	en
dc.subject.other	Single defect	en
dc.subject.other	Small size	en
dc.subject.other	Defects	en
dc.subject.other	Receiving antennas	en
dc.subject.other	Sensor nodes	en
dc.subject.other	Sensors	en
dc.subject.other	Telecommunication equipment	en
dc.subject.other	Wireless sensor networks	en
dc.subject.other	Bandwidth	en
dc.title	Coupling and correlation reduction in compact arrays with embedded ground defects: Experimental verification	en
heal.type	conferenceItem	en
heal.identifier.secondary	5505241	en
heal.publicationDate	2010	en
heal.abstract	Future applications of wireless sensor networks (WSN) are multimedia-driven and include sensor mobility. Thus, sensor nodes must combine small size, large bandwidth, and diversity capabilities. Compact arrays, offering transmit/receive diversity, suffer from strong mutual coupling (MC), which causes lower antenna efficiency, loss of bandwidth, and signal correlation. The experimental results of an efficient technique to reduce coupling in compact arrays are described herein. A single defect was inserted in the ground plane (GNDP) area between each pair of elements, and disturbed the GNDP currents so as to offer multidecibel coupling suppression, bandwidth recovery, and reduction of in-band correlation. The bandwidth of non-defected arrays degraded gracefully from 38% to 28% with decreasing interelement distance (0.25λ to 0.10λ). Defect-loaded arrays exhibited active impedance bandwidths 37-45% respectively. Measured MC was reduced by 15-20 dB. Finally, the paper also discusses the extension of this method to quasi-periodic defects.	en
heal.journalName	EuCAP 2010 - The 4th European Conference on Antennas and Propagation	en