On array failure mitigation using genetic algorithms and a priori joint optimization

Mitilineos, SA; Capsalis, CN

dc.contributor.author	Mitilineos, SA	en
dc.contributor.author	Capsalis, CN	en
dc.date.accessioned	2014-03-01T01:22:51Z
dc.date.available	2014-03-01T01:22:51Z
dc.date.issued	2005	en
dc.identifier.issn	1045-9243	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16683
dc.subject	Antenna array feeds	en
dc.subject	Antenna arrays	en
dc.subject	Circular arrays	en
dc.subject	Dipole arrays	en
dc.subject	Failure analysis	en
dc.subject	Genetic algorithms	en
dc.subject	Optimization methods	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Antenna lobes	en
dc.subject.other	Bandwidth	en
dc.subject.other	Failure analysis	en
dc.subject.other	Genetic algorithms	en
dc.subject.other	Numerical methods	en
dc.subject.other	Optimization	en
dc.subject.other	Circular arrays	en
dc.subject.other	Dipole arrays	en
dc.subject.other	Relative side lobe level (RSLL)	en
dc.subject.other	Antenna arrays	en
dc.title	On array failure mitigation using genetic algorithms and a priori joint optimization	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/MAP.2005.1599213	en
heal.identifier.secondary	http://dx.doi.org/10.1109/MAP.2005.1599213	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Antenna arrays are widely used in communications systems, especially in base-station installations, mainly for improvement of system capacity and spectral efficiency. The possibility of an antenna-array element failure is examined in this paper. If an element fails during operation, a significant degradation in the array's performance is observed, even after the redistribution of the excitation coefficients of the remaining elements. In recent research in the field, the redistribution of the elements' excitation coefficients is performed after the array failure, and the possibility of failure is not taken into account during the design of the array. In this paper, the possibility of a one-element failure is predicted and properly treated in early design stages. If the array is initially designed taking into account the possibility of a one-element failure, the elements' coefficients are redistributed more efficiently and the failure mitigation is superior. In order to demonstrate the applicability of the proposed technique, two eight-element, switched-beam circular arrays, covering the horizontal plane, were designed using the method of genetic algorithms (GAs). The array elements were considered to be identical dipoles, placed vertically to the x-y plane. The beamwidth of the main-beam lobe was 450 (2 pi/N, where N is the number of the array elements), the while maximum relative side lobe level (RSLL) was intended. Numerical results showed excellent agreement with the design goals.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Antennas and Propagation Magazine	en
dc.identifier.doi	10.1109/MAP.2005.1599213	en
dc.identifier.isi	ISI:000235321300021	en
dc.identifier.volume	47	en
dc.identifier.issue	5	en
dc.identifier.spage	227	en
dc.identifier.epage	232	en