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A bandwidth enhanced 915 MHz antenna for IoT wrist-watch applications
Kumar, Sanjeev; Buckley, John L.; Barton, John; Newberry, Robert; Dunlop, Gary; Rodencal, Matthew; Webster, Carlo; O'Flynn, Brendan
This paper presents a 915 MHz planar inverted-F antenna (PIFA) topology for a wrist-worn wireless sensor application. When compared with a conventional PIFA implementation, an impedance bandwidth enhancement of more than 100% is achieved. The bandwidth enhancement is realized with inclusion of a parasitic element that excites an additional mode close to the resonant frequency. A parametric analysis of the key parameters is performed in order to optimize the antenna for 915 MHz operation. The measured results for the on-body prototype antenna show a -10 dB bandwidth of 26.4 MHz and a Peak Realized Gain of -0.57 dBi at 915 MHz. The simulated peak radiation efficiency of 46.8% is achieved. In addition, the design exhibits a low specific absorption rate (SAR) value of 0.004 W/kg.
Keyword(s): Antenna; Bandwidth enhancement; Wristwatch; Sub-GHz; PIFA; Wearable
Publication Date:
Type: Conference item
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Enterprise Ireland; Science Foundation Ireland
Citation(s): Kumar, S., Buckley, J. L., Barton, J., Newberry, R., Dunlop, G., Rodencal, M., Webster, C. and O’Flynn, B. (2019) 'A bandwidth enhanced 915 MHz antenna for IoT wrist-watch applications', 13th European Conference on Antennas and Propagation (EuCAP 2019), Krakow, Poland, 31 March-5 April.
File Format(s): application/pdf
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First Indexed: 2019-05-09 06:31:01 Last Updated: 2019-05-10 06:30:55