Human Body Effect on Static UWB WBAN Off-Body Radio Channels
| Autor: | Matti Hämäläinen, Juha-Pekka Makela, Timo Kumpuniemi, Jari Iinatti, Kamya Yekeh Yazdandoost |
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| Rok vydání: | 2020 |
| Předmět: |
Anechoic chamber
Computer science Frequency band Acoustics 020208 electrical & electronic engineering Ultra-wideband 020206 networking & telecommunications 02 engineering and technology Impulse (physics) Dipole Body area network 0202 electrical engineering electronic engineering information engineering Path loss Time domain |
| Zdroj: | 13th EAI International Conference on Body Area Networks ISBN: 9783030298968 BODYNETS |
| DOI: | 10.1007/978-3-030-29897-5_2 |
| Popis: | This paper presents the effect of a human body on ultra-wideband off-body wireless body area network radio channels. The work is based on static measurements in an anechoic chamber by using a vector network analyzer in a 2–8 GHz frequency band. Thirteen antenna locations on a human body are used while the off-body node is attached to a pole at a distance 1 and 2 m from the test subject. Two planar prototype antennas are applied: dipole and double loop. The data analysis is carried out in time domain by observing the first arriving signal components of the channel impulse responses. The classical path loss model fitting results in path loss exponents of 1.7 and 1.4 for the dipole and double loop, respectively. The classical path loss model is not found to be suitable in all cases in wireless body area networks as the path loss exponent varies greatly depending on the antenna site under examination. The absolute path losses reach values between 50.6…66.5 dB (dipole) and 49.9…68.2 dB (double loop) depending on the antenna location. In most of the cases, the double loop performs better than the dipole. When averaged over all antenna sites, the mean path losses lie in the range of 57.6…61.3 dB, and their standard deviation is approximately 4…5 dB depending on the distance and antenna focus. |
| Databáze: | OpenAIRE |
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