Design of a Six-Sector Switched Parasitic Planar Array Using the Method of Genetic Algorithms

Varlamos, PK; Capsalis, CN

dc.contributor.author	Varlamos, PK	en
dc.contributor.author	Capsalis, CN	en
dc.date.accessioned	2014-03-01T01:18:51Z
dc.date.available	2014-03-01T01:18:51Z
dc.date.issued	2003	en
dc.identifier.issn	0929-6212	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15221
dc.subject	Electronic beam steering	en
dc.subject	Genetic algorithms	en
dc.subject	Smart antennas	en
dc.subject	Switched parasitic arrays	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Antenna feeders	en
dc.subject.other	Bandwidth	en
dc.subject.other	Directional patterns (antenna)	en
dc.subject.other	Genetic algorithms	en
dc.subject.other	Smart antennas	en
dc.subject.other	Antenna arrays	en
dc.title	Design of a Six-Sector Switched Parasitic Planar Array Using the Method of Genetic Algorithms	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1025329912599	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1025329912599	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	Switched parasitic planar arrays, as possible implementations of smart antennas, and an efficient method of designing them are presented in this paper. The radiation pattern of an array can be controlled by a digital word, the insertion of which in the antenna feeding circuit achieves electronic beam steering. The 1s and the 0s in the digital word represent the active and short-circuited elements in the array, respectively. The aim of the design is to cover the azimuth plane with six radiation patterns, each one having 3 dB beamwidth equal to 60degrees and relative sidelobe level not more than -3 dB. The well-known genetic algorithms are used to optimize the antenna performance, determining the element positions and voltage phase values. This is made feasible by selecting the digital words, among the 2(N)-1 available (N-number of elements), which maximize the objective function containing the pattern requirements of the design. The numerical results presented show a possible application of this idea. An array of seven identical dipoles lambda/2 offers diagrams, with an average 3 dB beamwidth equal to 63degrees. Relative sidelobe levels lower than -3 dB are obtained. Simulations at different frequencies prove that the array designed here is a narrowband one and its bandwidth is 2.5% of the carrier frequency.	en
heal.publisher	KLUWER ACADEMIC PUBL	en
heal.journalName	Wireless Personal Communications	en
dc.identifier.doi	10.1023/A:1025329912599	en
dc.identifier.isi	ISI:000184874600005	en
dc.identifier.volume	26	en
dc.identifier.issue	1	en
dc.identifier.spage	77	en
dc.identifier.epage	88	en