A dual-ISM-band antenna of small size using a spiral structure with parasitic element
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Date
2015-08-06
Authors
Buckley, John
McCarthy, Kevin G.
Loizou, Loizos
O'Flynn, Brendan
Ó Mathúna, S. Cian
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
This letter presents a compact, single-feed, dual-band antenna covering both the 433-MHz and 2.45-GHz Industrial Scientific and Medical (ISM) bands. The antenna has small dimensions of 51 ×28 mm². A square-spiral resonant element is printed on the top layer for the 433-MHz band. The remaining space within the spiral is used to introduce an additional parasitic monopole element on the bottom layer that is resonant at 2.45 GHz. Measured results show that the antenna has a 10-dB return-loss bandwidth of 2 MHz at 433 MHz and 132 MHz at 2.45 GHz, respectively. The antenna has omnidirectional radiation characteristics with a peak realized gain (measured) of -11.5 dBi at 433 MHz and +0.5 dBi at 2.45 GHz, respectively.
Description
Keywords
Antenna , Compact , Dual-band , Inverted-F antenna , IFA , Quality of service , QoS
Citation
Buckley, J. L., McCarthy, K. G., Loizou, L., O'Flynn, B. and O'Mathuna, C. (2016) 'A dual-ISM-band antenna of small size using a spiral structure with parasitic element', IEEE Antennas and Wireless Propagation Letters, 15, pp. 630-633. doi: 10.1109/LAWP.2015.2465831
Copyright
© 2015, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.