Design of a corner-reflector reactively controlled antenna for maximum directivity and multiple beam forming at 2.4 GHz

Dimousios, TD; Mitilineos, SA; Panagiotou, SC; Capsalis, CN

dc.contributor.author	Dimousios, TD	en
dc.contributor.author	Mitilineos, SA	en
dc.contributor.author	Panagiotou, SC	en
dc.contributor.author	Capsalis, CN	en
dc.date.accessioned	2014-03-01T01:35:29Z
dc.date.available	2014-03-01T01:35:29Z
dc.date.issued	2011	en
dc.identifier.issn	0018-926X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21078
dc.subject	Beam steering	en
dc.subject	corner reflector-electronically steerable passive array radiator CR-ESPAR	en
dc.subject	radiation pattern oscillation	en
dc.subject	reflector	en
dc.subject	transmit diversity	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Beam-steering	en
dc.subject.other	Corner reflector	en
dc.subject.other	radiation pattern oscillation	en
dc.subject.other	reflector	en
dc.subject.other	Transmit diversity	en
dc.subject.other	Electric impedance	en
dc.subject.other	Genetic algorithms	en
dc.subject.other	Multibeam antennas	en
dc.subject.other	Optimization	en
dc.subject.other	Radiators	en
dc.subject.other	Reflection	en
dc.subject.other	Resonance	en
dc.subject.other	Steerable antennas	en
dc.subject.other	Wireless telecommunication systems	en
dc.subject.other	Directional patterns (antenna)	en
dc.title	Design of a corner-reflector reactively controlled antenna for maximum directivity and multiple beam forming at 2.4 GHz	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TAP.2011.2109348	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TAP.2011.2109348	en
heal.identifier.secondary	5704179	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Electronically steerable passive array radiator (ESPAR) antennas constitute a promising research field and are expected to play important role in future wireless communications. In this paper, a new approach in ESPAR antenna design for base station applications is proposed. A corner-plate reflector is combined with active and passive (reactively loaded) elements in order to implement a corner-reflector ESPAR (CR-ESPAR) configuration. It is shown that when combined with corner reflectors in order to sectorize the coverage area, an ESPAR antenna offers multiple radiation patterns with higher directivity and resolution. A case study of a CR-ESPAR suitable for 2.4 GHz ISM applications is demonstrated, where the performance of the structure is optimized with respect to resonance frequency, input impedance, and multiple switched-beam patterns configuration. The optimization of the array is performed using a Genetic Algorithm (GA) tool as a method of choice, achieving a maximum gain equal to 14 dBi for a 30 degrees 3 dB-beamwidth and a gain of 11 dBi for a 45 degrees 3 dB-beamwidth, while the VSWR is kept below 1.7 in all cases. Due to its limited physical size, the proposed CR-ESPAR can be used as a portable antenna for deployment in WiFi, WLAN and other applications.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Antennas and Propagation	en
dc.identifier.doi	10.1109/TAP.2011.2109348	en
dc.identifier.isi	ISI:000289205200008	en
dc.identifier.volume	59	en
dc.identifier.issue	4	en
dc.identifier.spage	1132	en
dc.identifier.epage	1139	en