Radiation properties and ground-dependent response of compact printed sinusoidal antennas and arrays

Kakoyiannis, CG; Constantinou, P

dc.contributor.author	Kakoyiannis, CG	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T01:34:23Z
dc.date.available	2014-03-01T01:34:23Z
dc.date.issued	2010	en
dc.identifier.issn	1751-8725	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20723
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Active element patterns	en
dc.subject.other	Active impedance	en
dc.subject.other	Antenna performance	en
dc.subject.other	Bandwidth constraint	en
dc.subject.other	Broadband correlation	en
dc.subject.other	Broadband radiation	en
dc.subject.other	Compact arrays	en
dc.subject.other	Computational results	en
dc.subject.other	Correlation coefficient	en
dc.subject.other	Data-rate	en
dc.subject.other	Detunings	en
dc.subject.other	Fractional bandwidths	en
dc.subject.other	GHz band	en
dc.subject.other	Ground planes	en
dc.subject.other	Meander line antennas	en
dc.subject.other	Mutual coupling	en
dc.subject.other	Numerical results	en
dc.subject.other	Radiation properties	en
dc.subject.other	Scalar quantities	en
dc.subject.other	Wireless sensor node	en
dc.subject.other	Antenna grounds	en
dc.subject.other	Bandwidth	en
dc.subject.other	Butt welding	en
dc.subject.other	Electric network synthesis	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Sensor nodes	en
dc.subject.other	Telecommunication equipment	en
dc.subject.other	Monopole antennas	en
dc.title	Radiation properties and ground-dependent response of compact printed sinusoidal antennas and arrays	en
heal.type	journalArticle	en
heal.identifier.primary	10.1049/iet-map.2009.0162	en
heal.identifier.secondary	http://dx.doi.org/10.1049/iet-map.2009.0162	en
heal.identifier.secondary	IMAPCH000004000005000629000001	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Printed sinusoidal monopoles are enhanced meander-line antennas (MLAs). The antennas were designed in the 2.0-3.5-GHz band according to the size and bandwidth constraints of high data-rate wireless sensor nodes. Their performance was characterised in terms of electrical size, bandwidth and broadband radiation efficiency. A suitable scalar quantity was used to capture the overall performance. Numerical results show that sinusoidal monopoles can achieve 50% fractional bandwidth (FBW), which is a 60% improvement compared to an MLA of similar size and efficiency. Antenna performance depends heavily on electrical size, which depends on the size of the ground plane; its effect on radiation was also included. Compact printed arrays built with sinusoidal monopoles were also studied. Their performance was characterised in terms of active impedance bandwidth, broadband radiation efficiency, active element pattern, mutual coupling and broadband correlation coefficient. The results showed that densely packed compact arrays feature controllable element detuning, whereas correlation coefficient stayed below 0.5 even for λ/10 spacing. The computational results were supported by measurements on actual hardware. Antennas mirrored against the nominal 20-mm×30-mm ground plane achieved FBWs in the range 23-28%. Those that used the adapted ground plane (GNDP) size scored 24-34% FBWs. In the case of arrays, the active impedance FBW degraded gracefully with decreasing inter-element distance from 33% to 27%. © 2010 © The Institution of Engineering and Technology.	en
heal.publisher	INST ENGINEERING TECHNOLOGY-IET	en
heal.journalName	IET Microwaves, Antennas and Propagation	en
dc.identifier.doi	10.1049/iet-map.2009.0162	en
dc.identifier.isi	ISI:000279253600008	en
dc.identifier.volume	4	en
dc.identifier.issue	5	en
dc.identifier.spage	629	en
dc.identifier.epage	642	en