Influence of impairments due to dispersive propagation on the antenna design for body-based applications
| Autor: | Otman Agzhout, Erik Aguirre, David Alvarez Outerelo, Azzedin Naghar, Muhammad Dawood, Francisco Falcone, Ana Vazquez Alejos |
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| Rok vydání: | 2015 |
| Předmět: |
Optimal design
Electromagnetic field Frequency response Computer science business.industry Acoustics General Physics and Astronomy Signal Electronic Optical and Magnetic Materials Optics Feature (computer vision) Waveform Electrical and Electronic Engineering Antenna (radio) business Computer Science::Information Theory Communication channel |
| Zdroj: | Journal of Electromagnetic Waves and Applications. 29:2355-2364 |
| ISSN: | 1569-3937 0920-5071 |
| DOI: | 10.1080/09205071.2015.1103667 |
| Popis: | In this paper, we analyze the frequency-dependent feature of the human body as radio propagation channel and the influence of that characteristic on the design of antennas for body-based applications. We describe the main impairments due to the frequency dispersion propagation through the body channel. Firstly, we describe the formation of the electromagnetic fields called Brillouin precursors which are responsible for another vital impairment: broadening of the time width of a transmitted signal. Later, we show a theoretical radio channel characterization of a human tissue that is affected by the frequency dispersion. Following, we describe three solutions to the described problematic optimal design of waveforms matched to the body channel, anti-dispersive filtering, and optimal antenna design. We introduce two broadband antennas offering a flat frequency response, minimizing the formation of precursors that ensures optimal time domain performance for ultrawideband body-based applications. Finally, we di... |
| Databáze: | OpenAIRE |
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